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483 Commits
patch_22Se
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patch_5Feb
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@ -37,6 +37,10 @@ enable_language(CXX)
|
||||
#####################################################################
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||||
include(CheckCCompilerFlag)
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||||
|
||||
if (${CMAKE_CXX_COMPILER_ID} STREQUAL "Intel")
|
||||
set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -restrict")
|
||||
endif()
|
||||
|
||||
########################################################################
|
||||
# User input options #
|
||||
########################################################################
|
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@ -76,7 +80,7 @@ add_definitions(-DLAMMPS_MEMALIGN=${LAMMPS_MEMALIGN})
|
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option(LAMMPS_EXCEPTIONS "enable the use of C++ exceptions for error messages (useful for library interface)" OFF)
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if(LAMMPS_EXCEPTIONS)
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add_definitions(-DLAMMPS_EXCEPTIONS)
|
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set(LAMMPS_API_DEFINES "${LAMMPS_API_DEFINES -DLAMMPS_EXCEPTIONS")
|
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set(LAMMPS_API_DEFINES "${LAMMPS_API_DEFINES} -DLAMMPS_EXCEPTIONS")
|
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endif()
|
||||
|
||||
set(LAMMPS_MACHINE "" CACHE STRING "Suffix to append to lmp binary and liblammps (WON'T enable any features automatically")
|
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@ -100,8 +104,8 @@ set(OTHER_PACKAGES KIM PYTHON MSCG MPIIO VORONOI POEMS LATTE
|
||||
USER-ATC USER-AWPMD USER-CGDNA USER-MESO
|
||||
USER-CGSDK USER-COLVARS USER-DIFFRACTION USER-DPD USER-DRUDE USER-EFF
|
||||
USER-FEP USER-H5MD USER-LB USER-MANIFOLD USER-MEAMC USER-MGPT USER-MISC
|
||||
USER-MOLFILE USER-NETCDF USER-PHONON USER-QTB USER-REAXC USER-SMD
|
||||
USER-SMTBQ USER-SPH USER-TALLY USER-VTK USER-QUIP USER-QMMM)
|
||||
USER-MOFFF USER-MOLFILE USER-NETCDF USER-PHONON USER-QTB USER-REAXC USER-SMD
|
||||
USER-SMTBQ USER-SPH USER-TALLY USER-UEF USER-VTK USER-QUIP USER-QMMM)
|
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set(ACCEL_PACKAGES USER-OMP KOKKOS OPT USER-INTEL GPU)
|
||||
foreach(PKG ${DEFAULT_PACKAGES})
|
||||
option(ENABLE_${PKG} "Build ${PKG} Package" ${ENABLE_ALL})
|
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@ -166,13 +170,6 @@ if(ENABLE_KSPACE)
|
||||
endif()
|
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endif()
|
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if(ENABLE_MISC)
|
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option(LAMMPS_XDR "include XDR compatibility files for doing particle dumps in XTC format" OFF)
|
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if(LAMMPS_XDR)
|
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add_definitions(-DLAMMPS_XDR) # for liblammps
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endif()
|
||||
endif()
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if(ENABLE_MSCG OR ENABLE_USER-ATC OR ENABLE_USER-AWPMD OR ENABLE_USER-QUIP OR ENABLE_LATTE)
|
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find_package(LAPACK)
|
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if(NOT LAPACK_FOUND)
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@ -194,14 +191,13 @@ if(ENABLE_PYTHON)
|
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add_definitions(-DLMP_PYTHON)
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include_directories(${PYTHON_INCLUDE_DIR})
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list(APPEND LAMMPS_LINK_LIBS ${PYTHON_LIBRARY})
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if(BUILD_SHARED_LIBS)
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if(NOT PYTHON_INSTDIR)
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execute_process(COMMAND ${PYTHON_EXECUTABLE}
|
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-c "import distutils.sysconfig as cg; print(cg.get_python_lib(1,0,prefix='${CMAKE_INSTALL_PREFIX}'))"
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OUTPUT_VARIABLE PYTHON_INSTDIR OUTPUT_STRIP_TRAILING_WHITESPACE)
|
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endif()
|
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install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/../python/lammps.py DESTINATION ${PYTHON_INSTDIR})
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if(NOT BUILD_SHARED_LIBS)
|
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message(FATAL_ERROR "Python package need lammps to be build shared, use -DBUILD_SHARED_LIBS=ON")
|
||||
endif()
|
||||
endif()
|
||||
|
||||
@ -397,6 +393,10 @@ foreach(SIMPLE_LIB REAX MEAM POEMS USER-ATC USER-AWPMD USER-COLVARS USER-H5MD
|
||||
target_include_directories(awpmd PUBLIC ${LAMMPS_LIB_SOURCE_DIR}/awpmd/systems/interact ${LAMMPS_LIB_SOURCE_DIR}/awpmd/ivutils/include)
|
||||
elseif(PKG_LIB STREQUAL h5md)
|
||||
target_include_directories(h5md PUBLIC ${LAMMPS_LIB_SOURCE_DIR}/h5md/include)
|
||||
elseif(PKG_LIB STREQUAL colvars)
|
||||
target_compile_options(colvars PRIVATE -DLEPTON)
|
||||
target_include_directories(colvars PRIVATE ${LAMMPS_LIB_SOURCE_DIR}/colvars/lepton/include)
|
||||
target_include_directories(colvars PUBLIC ${LAMMPS_LIB_SOURCE_DIR}/colvars)
|
||||
else()
|
||||
target_include_directories(${PKG_LIB} PUBLIC ${LAMMPS_LIB_SOURCE_DIR}/${PKG_LIB})
|
||||
endif()
|
||||
@ -476,6 +476,8 @@ if(ENABLE_KOKKOS)
|
||||
${KOKKOS_PKG_SOURCES_DIR}/neigh_list_kokkos.cpp
|
||||
${KOKKOS_PKG_SOURCES_DIR}/neigh_bond_kokkos.cpp
|
||||
${KOKKOS_PKG_SOURCES_DIR}/fix_nh_kokkos.cpp
|
||||
${KOKKOS_PKG_SOURCES_DIR}/nbin_kokkos.cpp
|
||||
${KOKKOS_PKG_SOURCES_DIR}/npair_kokkos.cpp
|
||||
${KOKKOS_PKG_SOURCES_DIR}/domain_kokkos.cpp
|
||||
${KOKKOS_PKG_SOURCES_DIR}/modify_kokkos.cpp)
|
||||
set_property(GLOBAL PROPERTY "KOKKOS_PKG_SOURCES" "${KOKKOS_PKG_SOURCES}")
|
||||
@ -483,6 +485,17 @@ if(ENABLE_KOKKOS)
|
||||
# detects styles which have KOKKOS version
|
||||
RegisterStylesExt(${KOKKOS_PKG_SOURCES_DIR} kokkos KOKKOS_PKG_SOURCES)
|
||||
|
||||
# register kokkos-only styles
|
||||
RegisterNBinStyle(${KOKKOS_PKG_SOURCES_DIR}/nbin_kokkos.h)
|
||||
RegisterNPairStyle(${KOKKOS_PKG_SOURCES_DIR}/npair_kokkos.h)
|
||||
|
||||
if(ENABLE_USER-DPD)
|
||||
get_property(KOKKOS_PKG_SOURCES GLOBAL PROPERTY KOKKOS_PKG_SOURCES)
|
||||
list(APPEND KOKKOS_PKG_SOURCES ${KOKKOS_PKG_SOURCES_DIR}/npair_ssa_kokkos.cpp)
|
||||
RegisterNPairStyle(${KOKKOS_PKG_SOURCES_DIR}/npair_ssa_kokkos.h)
|
||||
set_property(GLOBAL PROPERTY "KOKKOS_PKG_SOURCES" "${KOKKOS_PKG_SOURCES}")
|
||||
endif()
|
||||
|
||||
get_property(KOKKOS_PKG_SOURCES GLOBAL PROPERTY KOKKOS_PKG_SOURCES)
|
||||
|
||||
list(APPEND LIB_SOURCES ${KOKKOS_PKG_SOURCES})
|
||||
@ -665,7 +678,9 @@ include_directories(${LAMMPS_STYLE_HEADERS_DIR})
|
||||
############################################
|
||||
add_library(lammps ${LIB_SOURCES})
|
||||
target_link_libraries(lammps ${LAMMPS_LINK_LIBS})
|
||||
if(LAMMPS_DEPS)
|
||||
add_dependencies(lammps ${LAMMPS_DEPS})
|
||||
endif()
|
||||
set_target_properties(lammps PROPERTIES OUTPUT_NAME lammps${LAMMPS_MACHINE})
|
||||
if(BUILD_SHARED_LIBS)
|
||||
set_target_properties(lammps PROPERTIES SOVERSION ${SOVERSION})
|
||||
|
||||
@ -11,6 +11,12 @@ function(FindStyleHeaders path style_class file_pattern headers)
|
||||
set_property(GLOBAL PROPERTY ${headers} "${hlist}")
|
||||
endfunction(FindStyleHeaders)
|
||||
|
||||
function(AddStyleHeader path headers)
|
||||
get_property(hlist GLOBAL PROPERTY ${headers})
|
||||
list(APPEND hlist ${path})
|
||||
set_property(GLOBAL PROPERTY ${headers} "${hlist}")
|
||||
endfunction(AddStyleHeader)
|
||||
|
||||
function(FindStyleHeadersExt path style_class extension headers sources)
|
||||
get_property(hlist GLOBAL PROPERTY ${headers})
|
||||
get_property(slist GLOBAL PROPERTY ${sources})
|
||||
@ -62,6 +68,22 @@ function(GenerateStyleHeader path property style)
|
||||
CreateStyleHeader("${path}" "style_${style}.h" ${files})
|
||||
endfunction(GenerateStyleHeader)
|
||||
|
||||
function(RegisterNBinStyles search_path)
|
||||
FindStyleHeaders(${search_path} NBIN_CLASS nbin_ NBIN ) # nbin ) # neighbor
|
||||
endfunction(RegisterNBinStyles)
|
||||
|
||||
function(RegisterNPairStyles search_path)
|
||||
FindStyleHeaders(${search_path} NPAIR_CLASS npair_ NPAIR ) # npair ) # neighbor
|
||||
endfunction(RegisterNPairStyles)
|
||||
|
||||
function(RegisterNBinStyle path)
|
||||
AddStyleHeader(${path} NBIN)
|
||||
endfunction(RegisterNBinStyle)
|
||||
|
||||
function(RegisterNPairStyle path)
|
||||
AddStyleHeader(${path} NPAIR)
|
||||
endfunction(RegisterNPairStyle)
|
||||
|
||||
function(RegisterStyles search_path)
|
||||
FindStyleHeaders(${search_path} ANGLE_CLASS angle_ ANGLE ) # angle ) # force
|
||||
FindStyleHeaders(${search_path} ATOM_CLASS atom_vec_ ATOM_VEC ) # atom ) # atom atom_vec_hybrid
|
||||
|
||||
@ -20,6 +20,7 @@ ifeq ($(shell which virtualenv >/dev/null 2>&1; echo $$?), 0)
|
||||
HAS_VIRTUALENV = YES
|
||||
endif
|
||||
|
||||
SPHINXEXTRA = -j $(shell $(PYTHON) -c 'import multiprocessing;print(multiprocessing.cpu_count())')
|
||||
SOURCES=$(wildcard src/*.txt)
|
||||
OBJECTS=$(SOURCES:src/%.txt=$(RSTDIR)/%.rst)
|
||||
|
||||
@ -55,7 +56,7 @@ html: $(OBJECTS) $(ANCHORCHECK)
|
||||
@(\
|
||||
. $(VENV)/bin/activate ;\
|
||||
cp -r src/* $(RSTDIR)/ ;\
|
||||
sphinx-build -j 8 -b html -c utils/sphinx-config -d $(BUILDDIR)/doctrees $(RSTDIR) html ;\
|
||||
sphinx-build $(SPHINXEXTRA) -b html -c utils/sphinx-config -d $(BUILDDIR)/doctrees $(RSTDIR) html ;\
|
||||
echo "############################################" ;\
|
||||
doc_anchor_check src/*.txt ;\
|
||||
echo "############################################" ;\
|
||||
@ -91,7 +92,7 @@ epub: $(OBJECTS)
|
||||
@(\
|
||||
. $(VENV)/bin/activate ;\
|
||||
cp -r src/* $(RSTDIR)/ ;\
|
||||
sphinx-build -j 8 -b epub -c utils/sphinx-config -d $(BUILDDIR)/doctrees $(RSTDIR) epub ;\
|
||||
sphinx-build $(SPHINXEXTRA) -b epub -c utils/sphinx-config -d $(BUILDDIR)/doctrees $(RSTDIR) epub ;\
|
||||
deactivate ;\
|
||||
)
|
||||
@mv epub/LAMMPS.epub .
|
||||
@ -159,7 +160,7 @@ $(VENV):
|
||||
@( \
|
||||
virtualenv -p $(PYTHON) $(VENV); \
|
||||
. $(VENV)/bin/activate; \
|
||||
pip install Sphinx==1.5.6; \
|
||||
pip install Sphinx; \
|
||||
pip install sphinxcontrib-images; \
|
||||
deactivate;\
|
||||
)
|
||||
|
||||
BIN
doc/src/Eqs/angle_class2_p6.jpg
Normal file
|
After Width: | Height: | Size: 14 KiB |
BIN
doc/src/Eqs/angle_cosine_buck6d.jpg
Normal file
|
After Width: | Height: | Size: 5.2 KiB |
BIN
doc/src/Eqs/bond_gromos.jpg
Normal file
|
After Width: | Height: | Size: 2.1 KiB |
10
doc/src/Eqs/bond_gromos.tex
Normal file
@ -0,0 +1,10 @@
|
||||
\documentclass[12pt]{article}
|
||||
\pagestyle{empty}
|
||||
|
||||
\begin{document}
|
||||
|
||||
$$
|
||||
E = K (r^2 - r_0^2)^2
|
||||
$$
|
||||
|
||||
\end{document}
|
||||
BIN
doc/src/Eqs/fix_rhok.jpg
Normal file
|
After Width: | Height: | Size: 18 KiB |
11
doc/src/Eqs/fix_rhok.tex
Normal file
@ -0,0 +1,11 @@
|
||||
\documentclass[12pt]{article}
|
||||
|
||||
\begin{document}
|
||||
|
||||
\begin{eqnarray*}
|
||||
U &=& \frac{1}{2} K (|\rho_{\vec{k}}| - a)^2 \\
|
||||
\rho_{\vec{k}} &=& \sum_j^N \exp(-i\vec{k} \cdot \vec{r}_j )/\sqrt{N} \\
|
||||
\vec{k} &=& (2\pi n_x /L_x , 2\pi n_y /L_y , 2\pi n_z/L_z )
|
||||
\end{eqnarray*}
|
||||
|
||||
\end{document}
|
||||
BIN
doc/src/Eqs/improper_inversion_harmonic.jpg
Normal file
|
After Width: | Height: | Size: 4.5 KiB |
BIN
doc/src/Eqs/pair_buck6d.jpg
Normal file
|
After Width: | Height: | Size: 6.9 KiB |
9
doc/src/Eqs/pair_buck6d.txt
Normal file
@ -0,0 +1,9 @@
|
||||
\documentclass[12pt]{article}
|
||||
|
||||
\begin{document}
|
||||
|
||||
\begin{eqnarray*}
|
||||
E = A e^{-\kappa r} - \frac{C}{r^6} \cdot \frac{1}{1 + D r^{14}} \qquad r < r_c \\
|
||||
\end{eqnarray*}
|
||||
|
||||
\end{document}
|
||||
BIN
doc/src/Eqs/pair_coul_gauss.jpg
Normal file
|
After Width: | Height: | Size: 7.1 KiB |
BIN
doc/src/Eqs/pair_ufm.jpg
Normal file
|
After Width: | Height: | Size: 17 KiB |
14
doc/src/Eqs/pair_ufm.tex
Normal file
@ -0,0 +1,14 @@
|
||||
\documentclass[12pt]{article}
|
||||
|
||||
\begin{document}
|
||||
|
||||
$$
|
||||
E = -\varepsilon\, \ln{\left[1-\exp{\left(-r^{2}/\sigma^{2}\right)}\right]} \qquad r < r_c
|
||||
$$
|
||||
|
||||
$$
|
||||
\varepsilon = p\,k_B\,T
|
||||
$$
|
||||
|
||||
\end{document}
|
||||
|
||||
BIN
doc/src/JPG/uef_frames.jpg
Normal file
|
After Width: | Height: | Size: 12 KiB |
|
Before Width: | Height: | Size: 20 KiB After Width: | Height: | Size: 19 KiB |
@ -1,7 +1,7 @@
|
||||
<!-- HTML_ONLY -->
|
||||
<HEAD>
|
||||
<TITLE>LAMMPS Users Manual</TITLE>
|
||||
<META NAME="docnumber" CONTENT="22 Sep 2017 version">
|
||||
<META NAME="docnumber" CONTENT="5 Feb 2018 version">
|
||||
<META NAME="author" CONTENT="http://lammps.sandia.gov - Sandia National Laboratories">
|
||||
<META NAME="copyright" CONTENT="Copyright (2003) Sandia Corporation. This software and manual is distributed under the GNU General Public License.">
|
||||
</HEAD>
|
||||
@ -21,7 +21,7 @@
|
||||
<H1></H1>
|
||||
|
||||
LAMMPS Documentation :c,h3
|
||||
22 Sep 2017 version :c,h4
|
||||
5 Feb 2018 version :c,h4
|
||||
|
||||
Version info: :h4
|
||||
|
||||
|
||||
@ -619,8 +619,9 @@ USER-INTEL, k = KOKKOS, o = USER-OMP, t = OPT.
|
||||
"pour"_fix_pour.html,
|
||||
"press/berendsen"_fix_press_berendsen.html,
|
||||
"print"_fix_print.html,
|
||||
"property/atom"_fix_property_atom.html,
|
||||
"python"_fix_python.html,
|
||||
"property/atom (k)"_fix_property_atom.html,
|
||||
"python/invoke"_fix_python_invoke.html,
|
||||
"python/move"_fix_python_move.html,
|
||||
"qeq/comb (o)"_fix_qeq_comb.html,
|
||||
"qeq/dynamic"_fix_qeq.html,
|
||||
"qeq/fire"_fix_qeq.html,
|
||||
@ -637,10 +638,10 @@ USER-INTEL, k = KOKKOS, o = USER-OMP, t = OPT.
|
||||
"rigid/nve (o)"_fix_rigid.html,
|
||||
"rigid/nvt (o)"_fix_rigid.html,
|
||||
"rigid/small (o)"_fix_rigid.html,
|
||||
"rigid/small/nph (o)"_fix_rigid.html,
|
||||
"rigid/small/npt (o)"_fix_rigid.html,
|
||||
"rigid/small/nve (o)"_fix_rigid.html,
|
||||
"rigid/small/nvt (o)"_fix_rigid.html,
|
||||
"rigid/small/nph"_fix_rigid.html,
|
||||
"rigid/small/npt"_fix_rigid.html,
|
||||
"rigid/small/nve"_fix_rigid.html,
|
||||
"rigid/small/nvt"_fix_rigid.html,
|
||||
"setforce (k)"_fix_setforce.html,
|
||||
"shake"_fix_shake.html,
|
||||
"spring"_fix_spring.html,
|
||||
@ -668,7 +669,7 @@ USER-INTEL, k = KOKKOS, o = USER-OMP, t = OPT.
|
||||
"wall/harmonic"_fix_wall.html,
|
||||
"wall/lj1043"_fix_wall.html,
|
||||
"wall/lj126"_fix_wall.html,
|
||||
"wall/lj93"_fix_wall.html,
|
||||
"wall/lj93 (k)"_fix_wall.html,
|
||||
"wall/piston"_fix_wall_piston.html,
|
||||
"wall/reflect (k)"_fix_wall_reflect.html,
|
||||
"wall/region"_fix_wall_region.html,
|
||||
@ -683,14 +684,14 @@ package"_Section_start.html#start_3.
|
||||
"atc"_fix_atc.html,
|
||||
"ave/correlate/long"_fix_ave_correlate_long.html,
|
||||
"colvars"_fix_colvars.html,
|
||||
"dpd/energy"_fix_dpd_energy.html,
|
||||
"dpd/energy (k)"_fix_dpd_energy.html,
|
||||
"drude"_fix_drude.html,
|
||||
"drude/transform/direct"_fix_drude_transform.html,
|
||||
"drude/transform/reverse"_fix_drude_transform.html,
|
||||
"edpd/source"_fix_dpd_source.html,
|
||||
"eos/cv"_fix_eos_cv.html,
|
||||
"eos/table"_fix_eos_table.html,
|
||||
"eos/table/rx"_fix_eos_table_rx.html,
|
||||
"eos/table/rx (k)"_fix_eos_table_rx.html,
|
||||
"filter/corotate"_fix_filter_corotate.html,
|
||||
"flow/gauss"_fix_flow_gauss.html,
|
||||
"gle"_fix_gle.html,
|
||||
@ -720,17 +721,20 @@ package"_Section_start.html#start_3.
|
||||
"nve/eff"_fix_nve_eff.html,
|
||||
"nvt/eff"_fix_nh_eff.html,
|
||||
"nvt/sllod/eff"_fix_nvt_sllod_eff.html,
|
||||
"npt/uef"_fix_nh_uef.html,
|
||||
"nvt/uef"_fix_nh_uef.html,
|
||||
"phonon"_fix_phonon.html,
|
||||
"pimd"_fix_pimd.html,
|
||||
"qbmsst"_fix_qbmsst.html,
|
||||
"qeq/reax (ko)"_fix_qeq_reax.html,
|
||||
"qmmm"_fix_qmmm.html,
|
||||
"qtb"_fix_qtb.html,
|
||||
"reax/c/bonds"_fix_reax_bonds.html,
|
||||
"reax/c/species"_fix_reaxc_species.html,
|
||||
"rx"_fix_rx.html,
|
||||
"reax/c/bonds (k)"_fix_reax_bonds.html,
|
||||
"reax/c/species (k)"_fix_reaxc_species.html,
|
||||
"rhok"_fix_rhok.html,
|
||||
"rx (k)"_fix_rx.html,
|
||||
"saed/vtk"_fix_saed_vtk.html,
|
||||
"shardlow"_fix_shardlow.html,
|
||||
"shardlow (k)"_fix_shardlow.html,
|
||||
"smd"_fix_smd.html,
|
||||
"smd/adjust/dt"_fix_smd_adjust_dt.html,
|
||||
"smd/integrate/tlsph"_fix_smd_integrate_tlsph.html,
|
||||
@ -856,6 +860,7 @@ package"_Section_start.html#start_3.
|
||||
"meso/t/atom"_compute_meso_t_atom.html,
|
||||
"pe/tally"_compute_tally.html,
|
||||
"pe/mol/tally"_compute_tally.html,
|
||||
"pressure/uef"_compute_pressure_uef.html,
|
||||
"saed"_compute_saed.html,
|
||||
"smd/contact/radius"_compute_smd_contact_radius.html,
|
||||
"smd/damage"_compute_smd_damage.html,
|
||||
@ -884,6 +889,7 @@ package"_Section_start.html#start_3.
|
||||
"temp/deform/eff"_compute_temp_deform_eff.html,
|
||||
"temp/region/eff"_compute_temp_region_eff.html,
|
||||
"temp/rotate"_compute_temp_rotate.html,
|
||||
"temp/uef"_compute_temp_uef.html,
|
||||
"xrd"_compute_xrd.html :tb(c=6,ea=c)
|
||||
|
||||
:line
|
||||
@ -901,7 +907,7 @@ KOKKOS, o = USER-OMP, t = OPT.
|
||||
"none"_pair_none.html,
|
||||
"zero"_pair_zero.html,
|
||||
"hybrid"_pair_hybrid.html,
|
||||
"hybrid/overlay"_pair_hybrid.html,
|
||||
"hybrid/overlay (k)"_pair_hybrid.html,
|
||||
"adp (o)"_pair_adp.html,
|
||||
"airebo (oi)"_pair_airebo.html,
|
||||
"airebo/morse (oi)"_pair_airebo.html,
|
||||
@ -915,11 +921,12 @@ KOKKOS, o = USER-OMP, t = OPT.
|
||||
"born/coul/long/cs"_pair_born.html,
|
||||
"born/coul/msm (o)"_pair_born.html,
|
||||
"born/coul/wolf (go)"_pair_born.html,
|
||||
"born/coul/wolf/cs"_pair_born.html,
|
||||
"brownian (o)"_pair_brownian.html,
|
||||
"brownian/poly (o)"_pair_brownian.html,
|
||||
"buck (gkio)"_pair_buck.html,
|
||||
"buck/coul/cut (gkio)"_pair_buck.html,
|
||||
"buck/coul/long (gkio)"_pair_buck.html,
|
||||
"buck (giko)"_pair_buck.html,
|
||||
"buck/coul/cut (giko)"_pair_buck.html,
|
||||
"buck/coul/long (giko)"_pair_buck.html,
|
||||
"buck/coul/long/cs"_pair_buck.html,
|
||||
"buck/coul/msm (o)"_pair_buck.html,
|
||||
"buck/long/coul/long (o)"_pair_buck_long.html,
|
||||
@ -934,12 +941,13 @@ KOKKOS, o = USER-OMP, t = OPT.
|
||||
"coul/msm"_pair_coul.html,
|
||||
"coul/streitz"_pair_coul.html,
|
||||
"coul/wolf (ko)"_pair_coul.html,
|
||||
"dpd (go)"_pair_dpd.html,
|
||||
"coul/wolf/cs"_pair_coul.html,
|
||||
"dpd (gio)"_pair_dpd.html,
|
||||
"dpd/tstat (go)"_pair_dpd.html,
|
||||
"dsmc"_pair_dsmc.html,
|
||||
"eam (gkiot)"_pair_eam.html,
|
||||
"eam/alloy (gkiot)"_pair_eam.html,
|
||||
"eam/fs (gkiot)"_pair_eam.html,
|
||||
"eam (gikot)"_pair_eam.html,
|
||||
"eam/alloy (gikot)"_pair_eam.html,
|
||||
"eam/fs (gikot)"_pair_eam.html,
|
||||
"eim (o)"_pair_eim.html,
|
||||
"gauss (go)"_pair_gauss.html,
|
||||
"gayberne (gio)"_pair_gayberne.html,
|
||||
@ -953,9 +961,9 @@ KOKKOS, o = USER-OMP, t = OPT.
|
||||
"kim"_pair_kim.html,
|
||||
"lcbop"_pair_lcbop.html,
|
||||
"line/lj"_pair_line_lj.html,
|
||||
"lj/charmm/coul/charmm (kio)"_pair_charmm.html,
|
||||
"lj/charmm/coul/charmm (iko)"_pair_charmm.html,
|
||||
"lj/charmm/coul/charmm/implicit (ko)"_pair_charmm.html,
|
||||
"lj/charmm/coul/long (gkio)"_pair_charmm.html,
|
||||
"lj/charmm/coul/long (giko)"_pair_charmm.html,
|
||||
"lj/charmm/coul/msm"_pair_charmm.html,
|
||||
"lj/charmmfsw/coul/charmmfsh"_pair_charmm.html,
|
||||
"lj/charmmfsw/coul/long"_pair_charmm.html,
|
||||
@ -1005,20 +1013,21 @@ KOKKOS, o = USER-OMP, t = OPT.
|
||||
"resquared (go)"_pair_resquared.html,
|
||||
"snap"_pair_snap.html,
|
||||
"soft (go)"_pair_soft.html,
|
||||
"sw (gkio)"_pair_sw.html,
|
||||
"sw (giko)"_pair_sw.html,
|
||||
"table (gko)"_pair_table.html,
|
||||
"tersoff (gkio)"_pair_tersoff.html,
|
||||
"tersoff (giko)"_pair_tersoff.html,
|
||||
"tersoff/mod (gko)"_pair_tersoff_mod.html,
|
||||
"tersoff/mod/c (o)"_pair_tersoff_mod.html,
|
||||
"tersoff/zbl (gko)"_pair_tersoff_zbl.html,
|
||||
"tip4p/cut (o)"_pair_coul.html,
|
||||
"tip4p/long (o)"_pair_coul.html,
|
||||
"tri/lj"_pair_tri_lj.html,
|
||||
"ufm (got)"_pair_ufm.html,
|
||||
"vashishta (ko)"_pair_vashishta.html,
|
||||
"vashishta/table (o)"_pair_vashishta.html,
|
||||
"yukawa (go)"_pair_yukawa.html,
|
||||
"yukawa (gok)"_pair_yukawa.html,
|
||||
"yukawa/colloid (go)"_pair_yukawa_colloid.html,
|
||||
"zbl (go)"_pair_zbl.html :tb(c=4,ea=c)
|
||||
"zbl (gok)"_pair_zbl.html :tb(c=4,ea=c)
|
||||
|
||||
These are additional pair styles in USER packages, which can be used
|
||||
if "LAMMPS is built with the appropriate
|
||||
@ -1031,13 +1040,14 @@ package"_Section_start.html#start_3.
|
||||
"coul/diel (o)"_pair_coul_diel.html,
|
||||
"coul/long/soft (o)"_pair_lj_soft.html,
|
||||
"dpd/fdt"_pair_dpd_fdt.html,
|
||||
"dpd/fdt/energy"_pair_dpd_fdt.html,
|
||||
"dpd/fdt/energy (k)"_pair_dpd_fdt.html,
|
||||
"eam/cd (o)"_pair_eam.html,
|
||||
"edip (o)"_pair_edip.html,
|
||||
"edip/multi"_pair_edip.html,
|
||||
"edpd"_pair_meso.html,
|
||||
"eff/cut"_pair_eff.html,
|
||||
"exp6/rx"_pair_exp6_rx.html,
|
||||
"exp6/rx (k)"_pair_exp6_rx.html,
|
||||
"extep"_pair_extep.html,
|
||||
"gauss/cut"_pair_gauss.html,
|
||||
"kolmogorov/crespi/z"_pair_kolmogorov_crespi_z.html,
|
||||
"lennard/mdf"_pair_mdf.html,
|
||||
@ -1063,7 +1073,7 @@ package"_Section_start.html#start_3.
|
||||
"morse/smooth/linear"_pair_morse.html,
|
||||
"morse/soft"_pair_morse.html,
|
||||
"multi/lucy"_pair_multi_lucy.html,
|
||||
"multi/lucy/rx"_pair_multi_lucy_rx.html,
|
||||
"multi/lucy/rx (k)"_pair_multi_lucy_rx.html,
|
||||
"oxdna/coaxstk"_pair_oxdna.html,
|
||||
"oxdna/excv"_pair_oxdna.html,
|
||||
"oxdna/hbond"_pair_oxdna.html,
|
||||
@ -1080,6 +1090,7 @@ package"_Section_start.html#start_3.
|
||||
"smd/triangulated/surface"_pair_smd_triangulated_surface.html,
|
||||
"smd/ulsph"_pair_smd_ulsph.html,
|
||||
"smtbq"_pair_smtbq.html,
|
||||
"snap (k)"_pair_snap.html,
|
||||
"sph/heatconduction"_pair_sph_heatconduction.html,
|
||||
"sph/idealgas"_pair_sph_idealgas.html,
|
||||
"sph/lj"_pair_sph_lj.html,
|
||||
@ -1087,7 +1098,7 @@ package"_Section_start.html#start_3.
|
||||
"sph/taitwater"_pair_sph_taitwater.html,
|
||||
"sph/taitwater/morris"_pair_sph_taitwater_morris.html,
|
||||
"srp"_pair_srp.html,
|
||||
"table/rx"_pair_table_rx.html,
|
||||
"table/rx (k)"_pair_table_rx.html,
|
||||
"tdpd"_pair_meso.html,
|
||||
"tersoff/table (o)"_pair_tersoff.html,
|
||||
"thole"_pair_thole.html,
|
||||
@ -1111,6 +1122,7 @@ KOKKOS, o = USER-OMP, t = OPT.
|
||||
"class2 (ko)"_bond_class2.html,
|
||||
"fene (iko)"_bond_fene.html,
|
||||
"fene/expand (o)"_bond_fene_expand.html,
|
||||
"gromos (o)"_bond_gromos.html,
|
||||
"harmonic (ko)"_bond_harmonic.html,
|
||||
"morse (o)"_bond_morse.html,
|
||||
"nonlinear (o)"_bond_nonlinear.html,
|
||||
@ -1177,7 +1189,7 @@ USER-OMP, t = OPT.
|
||||
"none"_dihedral_none.html,
|
||||
"zero"_dihedral_zero.html,
|
||||
"hybrid"_dihedral_hybrid.html,
|
||||
"charmm (ko)"_dihedral_charmm.html,
|
||||
"charmm (iko)"_dihedral_charmm.html,
|
||||
"charmmfsw"_dihedral_charmm.html,
|
||||
"class2 (ko)"_dihedral_class2.html,
|
||||
"harmonic (io)"_dihedral_harmonic.html,
|
||||
@ -1190,7 +1202,7 @@ used if "LAMMPS is built with the appropriate
|
||||
package"_Section_start.html#start_3.
|
||||
|
||||
"cosine/shift/exp (o)"_dihedral_cosine_shift_exp.html,
|
||||
"fourier (o)"_dihedral_fourier.html,
|
||||
"fourier (io)"_dihedral_fourier.html,
|
||||
"nharmonic (o)"_dihedral_nharmonic.html,
|
||||
"quadratic (o)"_dihedral_quadratic.html,
|
||||
"spherical (o)"_dihedral_spherical.html,
|
||||
@ -1213,7 +1225,7 @@ USER-OMP, t = OPT.
|
||||
"hybrid"_improper_hybrid.html,
|
||||
"class2 (ko)"_improper_class2.html,
|
||||
"cvff (io)"_improper_cvff.html,
|
||||
"harmonic (ko)"_improper_harmonic.html,
|
||||
"harmonic (iko)"_improper_harmonic.html,
|
||||
"umbrella (o)"_improper_umbrella.html :tb(c=4,ea=c)
|
||||
|
||||
These are additional improper styles in USER packages, which can be
|
||||
@ -1241,7 +1253,7 @@ USER-OMP, t = OPT.
|
||||
"ewald/disp"_kspace_style.html,
|
||||
"msm (o)"_kspace_style.html,
|
||||
"msm/cg (o)"_kspace_style.html,
|
||||
"pppm (go)"_kspace_style.html,
|
||||
"pppm (gok)"_kspace_style.html,
|
||||
"pppm/cg (o)"_kspace_style.html,
|
||||
"pppm/disp (i)"_kspace_style.html,
|
||||
"pppm/disp/tip4p"_kspace_style.html,
|
||||
|
||||
@ -454,7 +454,7 @@ NOTE: By default, for 2d systems, granular particles are still modeled
|
||||
as 3d spheres, not 2d discs (circles), meaning their moment of inertia
|
||||
will be the same as in 3d. If you wish to model granular particles in
|
||||
2d as 2d discs, see the note on this topic in "Section
|
||||
6.2"_Section_howto.html#howto_2, where 2d simulations are disussed.
|
||||
6.2"_Section_howto.html#howto_2, where 2d simulations are discussed.
|
||||
|
||||
:line
|
||||
|
||||
|
||||
@ -138,6 +138,7 @@ Package, Description, Doc page, Example, Library
|
||||
"USER-MESO"_#USER-MESO, mesoscale DPD models, "pair_style edpd"_pair_meso.html, USER/meso, -
|
||||
"USER-MGPT"_#USER-MGPT, fast MGPT multi-ion potentials, "pair_style mgpt"_pair_mgpt.html, USER/mgpt, -
|
||||
"USER-MISC"_#USER-MISC, single-file contributions, USER-MISC/README, USER/misc, -
|
||||
"USER-MOFFF"_#USER-MOFFF, styles for "MOF-FF"_MOFplus force field, "pair_style buck6d/coul/gauss"_pair_buck6d_coul_gauss.html, USER/mofff, -
|
||||
"USER-MOLFILE"_#USER-MOLFILE, "VMD"_vmd_home molfile plug-ins,"dump molfile"_dump_molfile.html, -, ext
|
||||
"USER-NETCDF"_#USER-NETCDF, dump output via NetCDF,"dump netcdf"_dump_netcdf.html, -, ext
|
||||
"USER-OMP"_#USER-OMP, OpenMP-enabled styles,"Section 5.3.4"_accelerate_omp.html, "Benchmarks"_http://lammps.sandia.gov/bench.html, -
|
||||
@ -150,6 +151,7 @@ Package, Description, Doc page, Example, Library
|
||||
"USER-SMTBQ"_#USER-SMTBQ, second moment tight binding QEq potential,"pair_style smtbq"_pair_smtbq.html, USER/smtbq, -
|
||||
"USER-SPH"_#USER-SPH, smoothed particle hydrodynamics,"SPH User Guide"_PDF/SPH_LAMMPS_userguide.pdf, USER/sph, -
|
||||
"USER-TALLY"_#USER-TALLY, pairwise tally computes,"compute XXX/tally"_compute_tally.html, USER/tally, -
|
||||
"USER-UEF"_#USER-UEF, extensional flow,"fix nvt/uef"_fix_nh_uef.html, USER/uef, -
|
||||
"USER-VTK"_#USER-VTK, dump output via VTK, "compute vtk"_dump_vtk.html, -, ext :tb(ea=c,ca1=l)
|
||||
|
||||
:line
|
||||
@ -242,7 +244,7 @@ COLLOID package :link(COLLOID),h4
|
||||
|
||||
[Contents:]
|
||||
|
||||
Coarse-grained finite-size colloidal particles. Pair stayle and fix
|
||||
Coarse-grained finite-size colloidal particles. Pair styles and fix
|
||||
wall styles for colloidal interactions. Includes the Fast Lubrication
|
||||
Dynamics (FLD) method for hydrodynamic interactions, which is a
|
||||
simplified approximation to Stokesian dynamics.
|
||||
@ -705,7 +707,7 @@ dynamics can be run with LAMMPS using density-functional tight-binding
|
||||
quantum forces calculated by LATTE.
|
||||
|
||||
More information on LATTE can be found at this web site:
|
||||
"https://github.com/lanl/LATTE"_#latte_home. A brief technical
|
||||
"https://github.com/lanl/LATTE"_latte_home. A brief technical
|
||||
description is given with the "fix latte"_fix_latte.html command.
|
||||
|
||||
:link(latte_home,https://github.com/lanl/LATTE)
|
||||
@ -728,11 +730,12 @@ make lib-latte args="-b" # download and build in lib/latte/LATTE-
|
||||
make lib-latte args="-p $HOME/latte" # use existing LATTE installation in $HOME/latte
|
||||
make lib-latte args="-b -m gfortran" # download and build in lib/latte and
|
||||
# copy Makefile.lammps.gfortran to Makefile.lammps
|
||||
:pre
|
||||
|
||||
Note that 3 symbolic (soft) links, "includelink" and "liblink" and
|
||||
"filelink", are created in lib/latte to point into the LATTE home dir.
|
||||
"filelink.o", are created in lib/latte to point into the LATTE home dir.
|
||||
When LAMMPS builds in src it will use these links. You should
|
||||
also check that the Makefile.lammps file you create is apporpriate
|
||||
also check that the Makefile.lammps file you create is appropriate
|
||||
for the compiler you use on your system to build LATTE.
|
||||
|
||||
You can then install/un-install the package and build LAMMPS in the
|
||||
@ -982,7 +985,7 @@ MSCG package :link(mscg),h4
|
||||
[Contents:]
|
||||
|
||||
A "fix mscg"_fix_mscg.html command which can parameterize a
|
||||
Mulit-Scale Coarse-Graining (MSCG) model using the open-source "MS-CG
|
||||
Multi-Scale Coarse-Graining (MSCG) model using the open-source "MS-CG
|
||||
library"_mscg_home.
|
||||
|
||||
:link(mscg_home,https://github.com/uchicago-voth/MSCG-release)
|
||||
@ -1779,7 +1782,7 @@ coarse-grained DPD-based models for energetic, reactive molecular
|
||||
crystalline materials. It includes many pair styles specific to these
|
||||
systems, including for reactive DPD, where each particle has internal
|
||||
state for multiple species and a coupled set of chemical reaction ODEs
|
||||
are integrated each timestep. Highly accurate time intergrators for
|
||||
are integrated each timestep. Highly accurate time integrators for
|
||||
isothermal, isoenergetic, isobaric and isenthalpic conditions are
|
||||
included. These enable long timesteps via the Shardlow splitting
|
||||
algorithm.
|
||||
@ -2229,7 +2232,7 @@ Several extensions of the the dissipative particle dynamics (DPD)
|
||||
method. Specifically, energy-conserving DPD (eDPD) that can model
|
||||
non-isothermal processes, many-body DPD (mDPD) for simulating
|
||||
vapor-liquid coexistence, and transport DPD (tDPD) for modeling
|
||||
advection-diffuion-reaction systems. The equations of motion of these
|
||||
advection-diffusion-reaction systems. The equations of motion of these
|
||||
DPD extensions are integrated through a modified velocity-Verlet (MVV)
|
||||
algorithm.
|
||||
|
||||
@ -2257,6 +2260,44 @@ http://lammps.sandia.gov/movies.html#mesodpd :ul
|
||||
|
||||
:line
|
||||
|
||||
USER-MOFFF package :link(USER-MOFFF),h4
|
||||
|
||||
[Contents:]
|
||||
|
||||
Pair, angle and improper styles needed to employ the MOF-FF
|
||||
force field by Schmid and coworkers with LAMMPS.
|
||||
MOF-FF is a first principles derived force field with the primary aim
|
||||
to simulate MOFs and related porous framework materials, using spherical
|
||||
Gaussian charges. It is described in S. Bureekaew et al., Phys. Stat. Sol. B
|
||||
2013, 250, 1128-1141.
|
||||
For the usage of MOF-FF see the example in the example directory as
|
||||
well as the "MOF+"_MOFplus website.
|
||||
|
||||
:link(MOFplus,https://www.mofplus.org/content/show/MOF-FF)
|
||||
|
||||
[Author:] Hendrik Heenen (Technical U of Munich),
|
||||
Rochus Schmid (Ruhr-University Bochum).
|
||||
|
||||
[Install or un-install:]
|
||||
|
||||
make yes-user-mofff
|
||||
make machine :pre
|
||||
|
||||
make no-user-mofff
|
||||
make machine :pre
|
||||
|
||||
[Supporting info:]
|
||||
|
||||
src/USER-MOFFF: filenames -> commands
|
||||
src/USER-MOFFF/README
|
||||
"pair_style buck6d/coul/gauss"_pair_buck6d_coul_gauss.html
|
||||
"angle_style class2"_angle_class2.html
|
||||
"angle_style cosine/buck6d"_angle_cosine_buck6d.html
|
||||
"improper_style inversion/harmonic"_improper_inversion_harmonic.html
|
||||
examples/USER/mofff :ul
|
||||
|
||||
:line
|
||||
|
||||
USER-MOLFILE package :link(USER-MOLFILE),h4
|
||||
|
||||
[Contents:]
|
||||
@ -2493,7 +2534,7 @@ make machine :pre
|
||||
|
||||
NOTE: The LAMMPS executable these steps produce is not yet functional
|
||||
for a QM/MM simulation. You must also build Quantum ESPRESSO and
|
||||
create a new executable which links LAMMPS and Quanutm ESPRESSO
|
||||
create a new executable which links LAMMPS and Quantum ESPRESSO
|
||||
together. These are steps 3 and 4 described in the lib/qmmm/README
|
||||
file.
|
||||
|
||||
@ -2552,7 +2593,7 @@ developed by the Cambridge University group.
|
||||
|
||||
:link(quip,https://github.com/libAtoms/QUIP)
|
||||
|
||||
To use this package you must have the QUIP libAatoms library available
|
||||
To use this package you must have the QUIP libAtoms library available
|
||||
on your system.
|
||||
|
||||
[Author:] Albert Bartok (Cambridge University)
|
||||
@ -2770,13 +2811,44 @@ examples/USER/tally :ul
|
||||
|
||||
:line
|
||||
|
||||
USER-UEF package :link(USER-UEF),h4
|
||||
|
||||
[Contents:]
|
||||
|
||||
A fix style for the integration of the equations of motion under
|
||||
extensional flow with proper boundary conditions, as well as several
|
||||
supporting compute styles and an output option.
|
||||
|
||||
[Author:] David Nicholson (MIT).
|
||||
|
||||
[Install or un-install:]
|
||||
|
||||
make yes-user-uef
|
||||
make machine :pre
|
||||
|
||||
make no-user-uef
|
||||
make machine :pre
|
||||
|
||||
[Supporting info:]
|
||||
|
||||
src/USER-UEF: filenames -> commands
|
||||
src/USER-UEF/README
|
||||
"fix nvt/uef"_fix_nh_uef.html
|
||||
"fix npt/uef"_fix_nh_uef.html
|
||||
"compute pressure/uef"_compute_pressure_uef.html
|
||||
"compute temp/uef"_compute_temp_uef.html
|
||||
"dump cfg/uef"_dump_cfg_uef.html
|
||||
examples/uef :ul
|
||||
|
||||
:line
|
||||
|
||||
USER-VTK package :link(USER-VTK),h4
|
||||
|
||||
[Contents:]
|
||||
|
||||
A "dump vtk"_dump_vtk.html command which outputs
|
||||
snapshot info in the "VTK format"_vtk, enabling visualization by
|
||||
"Paraview"_paraview or other visuzlization packages.
|
||||
A "dump vtk"_dump_vtk.html command which outputs snapshot info in the
|
||||
"VTK format"_vtk, enabling visualization by "Paraview"_paraview or
|
||||
other visualization packages.
|
||||
|
||||
:link(vtk,http://www.vtk.org)
|
||||
:link(paraview,http://www.paraview.org)
|
||||
|
||||
@ -123,7 +123,7 @@ code directly from an input script:
|
||||
|
||||
"python"_python.html
|
||||
"variable python"_variable.html
|
||||
"fix python"_fix_python.html
|
||||
"fix python/invoke"_fix_python_invoke.html
|
||||
"pair_style python"_pair_python.html :ul
|
||||
|
||||
The "python"_python.html command which can be used to define and
|
||||
@ -165,7 +165,7 @@ doc page for its python-style variables for more info, including
|
||||
examples of Python code you can write for both pure Python operations
|
||||
and callbacks to LAMMPS.
|
||||
|
||||
The "fix python"_fix_python.html command can execute
|
||||
The "fix python/invoke"_fix_python_invoke.html command can execute
|
||||
Python code at selected timesteps during a simulation run.
|
||||
|
||||
The "pair_style python"_pair_python command allows you to define
|
||||
|
||||
@ -79,7 +79,7 @@ This section has the following sub-sections:
|
||||
|
||||
Read this first :h5,link(start_2_1)
|
||||
|
||||
If you want to avoid building LAMMPS yourself, read the preceeding
|
||||
If you want to avoid building LAMMPS yourself, read the preceding
|
||||
section about options available for downloading and installing
|
||||
executables. Details are discussed on the "download"_download page.
|
||||
|
||||
@ -252,14 +252,13 @@ re-compile, after typing "make clean" (which will describe different
|
||||
clean options).
|
||||
|
||||
The LMP_INC variable is used to include options that turn on ifdefs
|
||||
within the LAMMPS code. The options that are currently recogized are:
|
||||
within the LAMMPS code. The options that are currently recognized are:
|
||||
|
||||
-DLAMMPS_GZIP
|
||||
-DLAMMPS_JPEG
|
||||
-DLAMMPS_PNG
|
||||
-DLAMMPS_FFMPEG
|
||||
-DLAMMPS_MEMALIGN
|
||||
-DLAMMPS_XDR
|
||||
-DLAMMPS_SMALLBIG
|
||||
-DLAMMPS_BIGBIG
|
||||
-DLAMMPS_SMALLSMALL
|
||||
@ -308,11 +307,6 @@ has to be aligned on larger than default byte boundaries (e.g. 16
|
||||
bytes instead of 8 bytes on x86 type platforms) for optimal
|
||||
performance.
|
||||
|
||||
If you use -DLAMMPS_XDR, the build will include XDR compatibility
|
||||
files for doing particle dumps in XTC format. This is only necessary
|
||||
if your platform does have its own XDR files available. See the
|
||||
Restrictions section of the "dump"_dump.html command for details.
|
||||
|
||||
Use at most one of the -DLAMMPS_SMALLBIG, -DLAMMPS_BIGBIG,
|
||||
-DLAMMPS_SMALLSMALL settings. The default is -DLAMMPS_SMALLBIG. These
|
||||
settings refer to use of 4-byte (small) vs 8-byte (big) integers
|
||||
@ -363,7 +357,7 @@ installed on your platform. If MPI is installed on your system in the
|
||||
usual place (under /usr/local), you also may not need to specify these
|
||||
3 variables, assuming /usr/local is in your path. On some large
|
||||
parallel machines which use "modules" for their compile/link
|
||||
environements, you may simply need to include the correct module in
|
||||
environments, you may simply need to include the correct module in
|
||||
your build environment, before building LAMMPS. Or the parallel
|
||||
machine may have a vendor-provided MPI which the compiler has no
|
||||
trouble finding.
|
||||
@ -431,7 +425,7 @@ use the KISS library described above.
|
||||
You may also need to set the FFT_INC, FFT_PATH, and FFT_LIB variables,
|
||||
so the compiler and linker can find the needed FFT header and library
|
||||
files. Note that on some large parallel machines which use "modules"
|
||||
for their compile/link environements, you may simply need to include
|
||||
for their compile/link environments, you may simply need to include
|
||||
the correct module in your build environment. Or the parallel machine
|
||||
may have a vendor-provided FFT library which the compiler has no
|
||||
trouble finding. See the src/MAKE/OPTIONS/Makefile.fftw file for an
|
||||
@ -470,7 +464,7 @@ precision.
|
||||
|
||||
The FFT_INC variable also allows for a -DFFT_SINGLE setting that will
|
||||
use single-precision FFTs with PPPM, which can speed-up long-range
|
||||
calulations, particularly in parallel or on GPUs. Fourier transform
|
||||
calculations, particularly in parallel or on GPUs. Fourier transform
|
||||
and related PPPM operations are somewhat insensitive to floating point
|
||||
truncation errors and thus do not always need to be performed in
|
||||
double precision. Using the -DFFT_SINGLE setting trades off a little
|
||||
@ -483,7 +477,7 @@ with support for single-precision, as explained above. For FFTW3 you
|
||||
also need to include -lfftw3f with the FFT_LIB setting, in addition to
|
||||
-lfftw3. For FFTW2, you also need to specify -DFFT_SIZE with the
|
||||
FFT_INC setting and -lsfftw with the FFT_LIB setting (in place of
|
||||
-lfftw). Similarly, if FFTW2 has been preinstalled with an explicit
|
||||
-lfftw). Similarly, if FFTW2 has been pre-installed with an explicit
|
||||
double-precision library (libdfftw.a and not the default libfftw.a),
|
||||
then you can specify -DFFT_SIZE (and not -DFFT_SINGLE), and specify
|
||||
-ldfftw to use double-precision FFTs.
|
||||
@ -714,7 +708,7 @@ list various make commands that can be used to manage packages.
|
||||
If you use a command in a LAMMPS input script that is part of a
|
||||
package, you must have built LAMMPS with that package, else you will
|
||||
get an error that the style is invalid or the command is unknown.
|
||||
Every command's doc page specfies if it is part of a package. You can
|
||||
Every command's doc page specifies if it is part of a package. You can
|
||||
type
|
||||
|
||||
lmp_machine -h :pre
|
||||
@ -859,7 +853,7 @@ details for each package.
|
||||
[External libraries:]
|
||||
|
||||
Packages in the tables "Section 4"_Section_packages.html with an "ext"
|
||||
in the last column link to exernal libraries whose source code is not
|
||||
in the last column link to external libraries whose source code is not
|
||||
included with LAMMPS. You must first download and install the library
|
||||
before building LAMMPS with that package installed. E.g. the voronoi
|
||||
package links to the freely available "Voro++ library"_voro_home2. You
|
||||
@ -963,7 +957,7 @@ src/MAKE/Makefile.foo and perform the build in the directory
|
||||
Obj_shared_foo. This is so that each file can be compiled with the
|
||||
-fPIC flag which is required for inclusion in a shared library. The
|
||||
build will create the file liblammps_foo.so which another application
|
||||
can link to dyamically. It will also create a soft link liblammps.so,
|
||||
can link to dynamically. It will also create a soft link liblammps.so,
|
||||
which will point to the most recently built shared library. This is
|
||||
the file the Python wrapper loads by default.
|
||||
|
||||
@ -1329,8 +1323,8 @@ LAMMPS is compiled with CUDA=yes.
|
||||
numa Nm :pre
|
||||
|
||||
This option is only relevant when using pthreads with hwloc support.
|
||||
In this case Nm defines the number of NUMA regions (typicaly sockets)
|
||||
on a node which will be utilizied by a single MPI rank. By default Nm
|
||||
In this case Nm defines the number of NUMA regions (typically sockets)
|
||||
on a node which will be utilized by a single MPI rank. By default Nm
|
||||
= 1. If this option is used the total number of worker-threads per
|
||||
MPI rank is threads*numa. Currently it is always almost better to
|
||||
assign at least one MPI rank per NUMA region, and leave numa set to
|
||||
@ -1394,7 +1388,7 @@ replica runs on on one or a few processors. Note that with MPI
|
||||
installed on a machine (e.g. your desktop), you can run on more
|
||||
(virtual) processors than you have physical processors.
|
||||
|
||||
To run multiple independent simulatoins from one input script, using
|
||||
To run multiple independent simulations from one input script, using
|
||||
multiple partitions, see "Section 6.4"_Section_howto.html#howto_4
|
||||
of the manual. World- and universe-style "variables"_variable.html
|
||||
are useful in this context.
|
||||
@ -1673,7 +1667,7 @@ The first section provides a global loop timing summary. The {loop time}
|
||||
is the total wall time for the section. The {Performance} line is
|
||||
provided for convenience to help predicting the number of loop
|
||||
continuations required and for comparing performance with other,
|
||||
similar MD codes. The {CPU use} line provides the CPU utilzation per
|
||||
similar MD codes. The {CPU use} line provides the CPU utilization per
|
||||
MPI task; it should be close to 100% times the number of OpenMP
|
||||
threads (or 1 of no OpenMP). Lower numbers correspond to delays due
|
||||
to file I/O or insufficient thread utilization.
|
||||
|
||||
@ -48,6 +48,7 @@ own sub-directories with their own Makefiles and/or README files.
|
||||
"chain"_#chain
|
||||
"colvars"_#colvars
|
||||
"createatoms"_#createatoms
|
||||
"doxygen"_#doxygen
|
||||
"drude"_#drude
|
||||
"eam database"_#eamdb
|
||||
"eam generate"_#eamgn
|
||||
@ -110,14 +111,21 @@ back-and-forth between the CHARMM MD code and LAMMPS.
|
||||
They are intended to make it easy to use CHARMM as a builder and as a
|
||||
post-processor for LAMMPS. Using charmm2lammps.pl, you can convert a
|
||||
PDB file with associated CHARMM info, including CHARMM force field
|
||||
data, into its LAMMPS equivalent. Using lammps2pdb.pl you can convert
|
||||
LAMMPS atom dumps into PDB files.
|
||||
data, into its LAMMPS equivalent. Support for the CMAP correction of
|
||||
CHARMM22 and later is available as an option. This tool can also add
|
||||
solvent water molecules and Na+ or Cl- ions to the system.
|
||||
Using lammps2pdb.pl you can convert LAMMPS atom dumps into PDB files.
|
||||
|
||||
See the README file in the ch2lmp sub-directory for more information.
|
||||
|
||||
These tools were created by Pieter in't Veld (pjintve at sandia.gov)
|
||||
and Paul Crozier (pscrozi at sandia.gov) at Sandia.
|
||||
|
||||
CMAP support added and tested by Xiaohu Hu (hux2 at ornl.gov) and
|
||||
Robert A. Latour (latourr at clemson.edu), David Hyde-Volpe, and
|
||||
Tigran Abramyan, (Clemson University) and
|
||||
Chris Lorenz (chris.lorenz at kcl.ac.uk), King's College London.
|
||||
|
||||
:line
|
||||
|
||||
chain tool :h4,link(chain)
|
||||
@ -172,6 +180,18 @@ The tool is authored by Xiaowang Zhou (Sandia), xzhou at sandia.gov.
|
||||
|
||||
:line
|
||||
|
||||
doxygen tool :h4,link(doxygen)
|
||||
|
||||
The tools/doxygen directory contains a shell script called
|
||||
doxygen.sh which can generate a call graph and API lists using
|
||||
the "Doxygen"_http://doxygen.org software.
|
||||
|
||||
See the included README file for details.
|
||||
|
||||
The tool is authored by Nandor Tamaskovics, numericalfreedom at googlemail.com.
|
||||
|
||||
:line
|
||||
|
||||
drude tool :h4,link(drude)
|
||||
|
||||
The tools/drude directory contains a Python script called
|
||||
|
||||
@ -25,14 +25,14 @@ LAMMPS to run on the CPU cores and coprocessor cores simultaneously.
|
||||
[Currently Available USER-INTEL Styles:]
|
||||
|
||||
Angle Styles: charmm, harmonic :ulb,l
|
||||
Bond Styles: fene, harmonic :l
|
||||
Bond Styles: fene, fourier, harmonic :l
|
||||
Dihedral Styles: charmm, harmonic, opls :l
|
||||
Fixes: nve, npt, nvt, nvt/sllod :l
|
||||
Fixes: nve, npt, nvt, nvt/sllod, nve/asphere :l
|
||||
Improper Styles: cvff, harmonic :l
|
||||
Pair Styles: airebo, airebo/morse, buck/coul/cut, buck/coul/long,
|
||||
buck, eam, eam/alloy, eam/fs, gayberne, lj/charmm/coul/charmm,
|
||||
lj/charmm/coul/long, lj/cut, lj/cut/coul/long, lj/long/coul/long, rebo,
|
||||
sw, tersoff :l
|
||||
buck, dpd, eam, eam/alloy, eam/fs, gayberne, lj/charmm/coul/charmm,
|
||||
lj/charmm/coul/long, lj/cut, lj/cut/coul/long, lj/long/coul/long,
|
||||
rebo, sw, tersoff :l
|
||||
K-Space Styles: pppm, pppm/disp :l
|
||||
:ule
|
||||
|
||||
@ -54,11 +54,12 @@ warmup run (for use with offload benchmarks).
|
||||
:c,image(JPG/user_intel.png)
|
||||
|
||||
Results are speedups obtained on Intel Xeon E5-2697v4 processors
|
||||
(code-named Broadwell) and Intel Xeon Phi 7250 processors
|
||||
(code-named Knights Landing) with "June 2017" LAMMPS built with
|
||||
Intel Parallel Studio 2017 update 2. Results are with 1 MPI task
|
||||
per physical core. See {src/USER-INTEL/TEST/README} for the raw
|
||||
simulation rates and instructions to reproduce.
|
||||
(code-named Broadwell), Intel Xeon Phi 7250 processors (code-named
|
||||
Knights Landing), and Intel Xeon Gold 6148 processors (code-named
|
||||
Skylake) with "June 2017" LAMMPS built with Intel Parallel Studio
|
||||
2017 update 2. Results are with 1 MPI task per physical core. See
|
||||
{src/USER-INTEL/TEST/README} for the raw simulation rates and
|
||||
instructions to reproduce.
|
||||
|
||||
:line
|
||||
|
||||
@ -77,11 +78,16 @@ order of operations compared to LAMMPS without acceleration:
|
||||
Neighbor lists can be created in a different order :ulb,l
|
||||
Bins used for sorting atoms can be oriented differently :l
|
||||
The default stencil order for PPPM is 7. By default, LAMMPS will
|
||||
calculate other PPPM parameters to fit the desired acuracy with
|
||||
calculate other PPPM parameters to fit the desired accuracy with
|
||||
this order :l
|
||||
The {newton} setting applies to all atoms, not just atoms shared
|
||||
between MPI tasks :l
|
||||
Vectorization can change the order for adding pairwise forces :l
|
||||
When using the -DLMP_USE_MKL_RNG define (all included intel optimized
|
||||
makefiles do) at build time, the random number generator for
|
||||
dissipative particle dynamics (pair style dpd/intel) uses the Mersenne
|
||||
Twister generator included in the Intel MKL library (that should be
|
||||
more robust than the default Masaglia random number generator) :l
|
||||
:ule
|
||||
|
||||
The precision mode (described below) used with the USER-INTEL
|
||||
@ -119,8 +125,8 @@ For Intel Xeon Phi CPUs:
|
||||
Runs should be performed using MCDRAM. :ulb,l
|
||||
:ule
|
||||
|
||||
For simulations using {kspace_style pppm} on Intel CPUs
|
||||
supporting AVX-512:
|
||||
For simulations using {kspace_style pppm} on Intel CPUs supporting
|
||||
AVX-512:
|
||||
|
||||
Add "kspace_modify diff ad" to the input script :ulb,l
|
||||
The command-line option should be changed to
|
||||
@ -237,14 +243,17 @@ However, if you do not have coprocessors on your system, building
|
||||
without offload support will produce a smaller binary.
|
||||
|
||||
The general requirements for Makefiles with the USER-INTEL package
|
||||
are as follows. "-DLAMMPS_MEMALIGN=64" is required for CCFLAGS. When
|
||||
using Intel compilers, "-restrict" is required and "-qopenmp" is
|
||||
highly recommended for CCFLAGS and LINKFLAGS. LIB should include
|
||||
"-ltbbmalloc". For builds supporting offload, "-DLMP_INTEL_OFFLOAD"
|
||||
is required for CCFLAGS and "-qoffload" is required for LINKFLAGS.
|
||||
Other recommended CCFLAG options for best performance are
|
||||
"-O2 -fno-alias -ansi-alias -qoverride-limits fp-model fast=2
|
||||
-no-prec-div".
|
||||
are as follows. When using Intel compilers, "-restrict" is required
|
||||
and "-qopenmp" is highly recommended for CCFLAGS and LINKFLAGS.
|
||||
CCFLAGS should include "-DLMP_INTEL_USELRT" (unless POSIX Threads
|
||||
are not supported in the build environment) and "-DLMP_USE_MKL_RNG"
|
||||
(unless Intel Math Kernel Library (MKL) is not available in the build
|
||||
environment). For Intel compilers, LIB should include "-ltbbmalloc"
|
||||
or if the library is not available, "-DLMP_INTEL_NO_TBB" can be added
|
||||
to CCFLAGS. For builds supporting offload, "-DLMP_INTEL_OFFLOAD" is
|
||||
required for CCFLAGS and "-qoffload" is required for LINKFLAGS. Other
|
||||
recommended CCFLAG options for best performance are "-O2 -fno-alias
|
||||
-ansi-alias -qoverride-limits fp-model fast=2 -no-prec-div".
|
||||
|
||||
NOTE: The vectorization and math capabilities can differ depending on
|
||||
the CPU. For Intel compilers, the "-x" flag specifies the type of
|
||||
|
||||
@ -11,336 +11,346 @@
|
||||
|
||||
5.3.3 KOKKOS package :h5
|
||||
|
||||
The KOKKOS package was developed primarily by Christian Trott (Sandia)
|
||||
with contributions of various styles by others, including Sikandar
|
||||
Mashayak (UIUC), Stan Moore (Sandia), and Ray Shan (Sandia). The
|
||||
underlying Kokkos library was written primarily by Carter Edwards,
|
||||
Kokkos is a templated C++ library that provides abstractions to allow
|
||||
a single implementation of an application kernel (e.g. a pair style) to run efficiently on
|
||||
different kinds of hardware, such as GPUs, Intel Xeon Phis, or many-core
|
||||
CPUs. Kokkos maps the C++ kernel onto different backend languages such as CUDA, OpenMP, or Pthreads.
|
||||
The Kokkos library also provides data abstractions to adjust (at
|
||||
compile time) the memory layout of data structures like 2d and
|
||||
3d arrays to optimize performance on different hardware. For more information on Kokkos, see
|
||||
"Github"_https://github.com/kokkos/kokkos. Kokkos is part of
|
||||
"Trilinos"_http://trilinos.sandia.gov/packages/kokkos. The Kokkos library was written primarily by Carter Edwards,
|
||||
Christian Trott, and Dan Sunderland (all Sandia).
|
||||
|
||||
The KOKKOS package contains versions of pair, fix, and atom styles
|
||||
The LAMMPS KOKKOS package contains versions of pair, fix, and atom styles
|
||||
that use data structures and macros provided by the Kokkos library,
|
||||
which is included with LAMMPS in lib/kokkos.
|
||||
|
||||
The Kokkos library is part of
|
||||
"Trilinos"_http://trilinos.sandia.gov/packages/kokkos and can also be
|
||||
downloaded from "Github"_https://github.com/kokkos/kokkos. Kokkos is a
|
||||
templated C++ library that provides two key abstractions for an
|
||||
application like LAMMPS. First, it allows a single implementation of
|
||||
an application kernel (e.g. a pair style) to run efficiently on
|
||||
different kinds of hardware, such as a GPU, Intel Phi, or many-core
|
||||
CPU.
|
||||
|
||||
The Kokkos library also provides data abstractions to adjust (at
|
||||
compile time) the memory layout of basic data structures like 2d and
|
||||
3d arrays and allow the transparent utilization of special hardware
|
||||
load and store operations. Such data structures are used in LAMMPS to
|
||||
store atom coordinates or forces or neighbor lists. The layout is
|
||||
chosen to optimize performance on different platforms. Again this
|
||||
functionality is hidden from the developer, and does not affect how
|
||||
the kernel is coded.
|
||||
|
||||
These abstractions are set at build time, when LAMMPS is compiled with
|
||||
the KOKKOS package installed. All Kokkos operations occur within the
|
||||
context of an individual MPI task running on a single node of the
|
||||
machine. The total number of MPI tasks used by LAMMPS (one or
|
||||
multiple per compute node) is set in the usual manner via the mpirun
|
||||
or mpiexec commands, and is independent of Kokkos.
|
||||
which is included with LAMMPS in /lib/kokkos. The KOKKOS package was developed primarily by Christian Trott (Sandia)
|
||||
and Stan Moore (Sandia) with contributions of various styles by others, including Sikandar
|
||||
Mashayak (UIUC), Ray Shan (Sandia), and Dan Ibanez (Sandia). For more information on developing using Kokkos abstractions
|
||||
see the Kokkos programmers' guide at /lib/kokkos/doc/Kokkos_PG.pdf.
|
||||
|
||||
Kokkos currently provides support for 3 modes of execution (per MPI
|
||||
task). These are OpenMP (for many-core CPUs), Cuda (for NVIDIA GPUs),
|
||||
and OpenMP (for Intel Phi). Note that the KOKKOS package supports
|
||||
running on the Phi in native mode, not offload mode like the
|
||||
USER-INTEL package supports. You choose the mode at build time to
|
||||
task). These are Serial (MPI-only for CPUs and Intel Phi), OpenMP (threading
|
||||
for many-core CPUs and Intel Phi), and CUDA (for NVIDIA GPUs). You choose the mode at build time to
|
||||
produce an executable compatible with specific hardware.
|
||||
|
||||
Here is a quick overview of how to use the KOKKOS package
|
||||
for CPU acceleration, assuming one or more 16-core nodes.
|
||||
More details follow.
|
||||
[Building LAMMPS with the KOKKOS package:]
|
||||
|
||||
use a C++11 compatible compiler
|
||||
NOTE: Kokkos support within LAMMPS must be built with a C++11 compatible
|
||||
compiler. This means GCC version 4.7.2 or later, Intel 14.0.4 or later, or
|
||||
Clang 3.5.2 or later is required.
|
||||
|
||||
The recommended method of building the KOKKOS package is to start with the provided Kokkos
|
||||
Makefiles in /src/MAKE/OPTIONS/. You may need to modify the KOKKOS_ARCH variable in the Makefile
|
||||
to match your specific hardware. For example:
|
||||
|
||||
for Sandy Bridge CPUs, set KOKKOS_ARCH=SNB
|
||||
for Broadwell CPUs, set KOKKOS_ARCH=BWD
|
||||
for K80 GPUs, set KOKKOS_ARCH=Kepler37
|
||||
for P100 GPUs and Power8 CPUs, set KOKKOS_ARCH=Pascal60,Power8 :ul
|
||||
|
||||
See the [Advanced Kokkos Options] section below for a listing of all KOKKOS_ARCH options.
|
||||
|
||||
[Compile for CPU-only (MPI only, no threading):]
|
||||
|
||||
use a C++11 compatible compiler and set KOKKOS_ARCH variable in
|
||||
/src/MAKE/OPTIONS/Makefile.kokkos_mpi_only as described above. Then do the
|
||||
following:
|
||||
|
||||
cd lammps/src
|
||||
make yes-kokkos
|
||||
make mpi KOKKOS_DEVICES=OpenMP # build with the KOKKOS package
|
||||
make kokkos_omp # or Makefile.kokkos_omp already has variable set :pre
|
||||
make kokkos_mpi_only :pre
|
||||
|
||||
mpirun -np 16 lmp_mpi -k on -sf kk -in in.lj # 1 node, 16 MPI tasks/node, no threads
|
||||
mpirun -np 2 -ppn 1 lmp_mpi -k on t 16 -sf kk -in in.lj # 2 nodes, 1 MPI task/node, 16 threads/task
|
||||
mpirun -np 2 lmp_mpi -k on t 8 -sf kk -in in.lj # 1 node, 2 MPI tasks/node, 8 threads/task
|
||||
mpirun -np 32 -ppn 4 lmp_mpi -k on t 4 -sf kk -in in.lj # 8 nodes, 4 MPI tasks/node, 4 threads/task :pre
|
||||
[Compile for CPU-only (MPI plus OpenMP threading):]
|
||||
|
||||
specify variables and settings in your Makefile.machine that enable OpenMP, GPU, or Phi support
|
||||
include the KOKKOS package and build LAMMPS
|
||||
enable the KOKKOS package and its hardware options via the "-k on" command-line switch use KOKKOS styles in your input script :ul
|
||||
|
||||
Here is a quick overview of how to use the KOKKOS package for GPUs,
|
||||
assuming one or more nodes, each with 16 cores and a GPU. More
|
||||
details follow.
|
||||
|
||||
discuss use of NVCC, which Makefiles to examine
|
||||
|
||||
use a C++11 compatible compiler
|
||||
KOKKOS_DEVICES = Cuda, OpenMP
|
||||
KOKKOS_ARCH = Kepler35
|
||||
make yes-kokkos
|
||||
make machine :pre
|
||||
|
||||
mpirun -np 1 lmp_cuda -k on t 6 -sf kk -in in.lj # one MPI task, 6 threads on CPU
|
||||
mpirun -np 4 -ppn 1 lmp_cuda -k on t 6 -sf kk -in in.lj # ditto on 4 nodes :pre
|
||||
|
||||
mpirun -np 2 lmp_cuda -k on t 8 g 2 -sf kk -in in.lj # two MPI tasks, 8 threads per CPU
|
||||
mpirun -np 32 -ppn 2 lmp_cuda -k on t 8 g 2 -sf kk -in in.lj # ditto on 16 nodes :pre
|
||||
|
||||
Here is a quick overview of how to use the KOKKOS package
|
||||
for the Intel Phi:
|
||||
|
||||
use a C++11 compatible compiler
|
||||
KOKKOS_DEVICES = OpenMP
|
||||
KOKKOS_ARCH = KNC
|
||||
make yes-kokkos
|
||||
make machine :pre
|
||||
|
||||
host=MIC, Intel Phi with 61 cores (240 threads/phi via 4x hardware threading):
|
||||
mpirun -np 1 lmp_g++ -k on t 240 -sf kk -in in.lj # 1 MPI task on 1 Phi, 1*240 = 240
|
||||
mpirun -np 30 lmp_g++ -k on t 8 -sf kk -in in.lj # 30 MPI tasks on 1 Phi, 30*8 = 240
|
||||
mpirun -np 12 lmp_g++ -k on t 20 -sf kk -in in.lj # 12 MPI tasks on 1 Phi, 12*20 = 240
|
||||
mpirun -np 96 -ppn 12 lmp_g++ -k on t 20 -sf kk -in in.lj # ditto on 8 Phis :pre
|
||||
|
||||
[Required hardware/software:]
|
||||
|
||||
Kokkos support within LAMMPS must be built with a C++11 compatible
|
||||
compiler. If using gcc, version 4.7.2 or later is required.
|
||||
|
||||
To build with Kokkos support for CPUs, your compiler must support the
|
||||
NOTE: To build with Kokkos support for OpenMP threading, your compiler must support the
|
||||
OpenMP interface. You should have one or more multi-core CPUs so that
|
||||
multiple threads can be launched by each MPI task running on a CPU.
|
||||
|
||||
To build with Kokkos support for NVIDIA GPUs, NVIDIA CUDA software
|
||||
use a C++11 compatible compiler and set KOKKOS_ARCH variable in
|
||||
/src/MAKE/OPTIONS/Makefile.kokkos_omp as described above. Then do the
|
||||
following:
|
||||
|
||||
cd lammps/src
|
||||
make yes-kokkos
|
||||
make kokkos_omp :pre
|
||||
|
||||
[Compile for Intel KNL Xeon Phi (Intel Compiler, OpenMPI):]
|
||||
|
||||
use a C++11 compatible compiler and do the following:
|
||||
|
||||
cd lammps/src
|
||||
make yes-kokkos
|
||||
make kokkos_phi :pre
|
||||
|
||||
[Compile for CPUs and GPUs (with OpenMPI or MPICH):]
|
||||
|
||||
NOTE: To build with Kokkos support for NVIDIA GPUs, NVIDIA CUDA software
|
||||
version 7.5 or later must be installed on your system. See the
|
||||
discussion for the "GPU"_accelerate_gpu.html package for details of
|
||||
how to check and do this.
|
||||
|
||||
use a C++11 compatible compiler and set KOKKOS_ARCH variable in
|
||||
/src/MAKE/OPTIONS/Makefile.kokkos_cuda_mpi for both GPU and CPU as described
|
||||
above. Then do the following:
|
||||
|
||||
cd lammps/src
|
||||
make yes-kokkos
|
||||
make kokkos_cuda_mpi :pre
|
||||
|
||||
[Alternative Methods of Compiling:]
|
||||
|
||||
Alternatively, the KOKKOS package can be built by specifying Kokkos variables
|
||||
on the make command line. For example:
|
||||
|
||||
make mpi KOKKOS_DEVICES=OpenMP KOKKOS_ARCH=SNB # set the KOKKOS_DEVICES and KOKKOS_ARCH variable explicitly
|
||||
make kokkos_cuda_mpi KOKKOS_ARCH=Pascal60,Power8 # set the KOKKOS_ARCH variable explicitly :pre
|
||||
|
||||
Setting the KOKKOS_DEVICES and KOKKOS_ARCH variables on the
|
||||
make command line requires a GNU-compatible make command. Try
|
||||
"gmake" if your system's standard make complains.
|
||||
|
||||
NOTE: If you build using make line variables and re-build LAMMPS twice
|
||||
with different KOKKOS options and the *same* target, then you *must* perform a "make clean-all"
|
||||
or "make clean-machine" before each build. This is to force all the
|
||||
KOKKOS-dependent files to be re-compiled with the new options.
|
||||
|
||||
[Running LAMMPS with the KOKKOS package:]
|
||||
|
||||
All Kokkos operations occur within the
|
||||
context of an individual MPI task running on a single node of the
|
||||
machine. The total number of MPI tasks used by LAMMPS (one or
|
||||
multiple per compute node) is set in the usual manner via the mpirun
|
||||
or mpiexec commands, and is independent of Kokkos. E.g. the mpirun
|
||||
command in OpenMPI does this via its
|
||||
-np and -npernode switches. Ditto for MPICH via -np and -ppn.
|
||||
|
||||
[Running on a multi-core CPU:]
|
||||
|
||||
Here is a quick overview of how to use the KOKKOS package
|
||||
for CPU acceleration, assuming one or more 16-core nodes.
|
||||
|
||||
mpirun -np 16 lmp_kokkos_mpi_only -k on -sf kk -in in.lj # 1 node, 16 MPI tasks/node, no multi-threading
|
||||
mpirun -np 2 -ppn 1 lmp_kokkos_omp -k on t 16 -sf kk -in in.lj # 2 nodes, 1 MPI task/node, 16 threads/task
|
||||
mpirun -np 2 lmp_kokkos_omp -k on t 8 -sf kk -in in.lj # 1 node, 2 MPI tasks/node, 8 threads/task
|
||||
mpirun -np 32 -ppn 4 lmp_kokkos_omp -k on t 4 -sf kk -in in.lj # 8 nodes, 4 MPI tasks/node, 4 threads/task :pre
|
||||
|
||||
To run using the KOKKOS package, use the "-k on", "-sf kk" and "-pk kokkos" "command-line switches"_Section_start.html#start_7 in your mpirun command.
|
||||
You must use the "-k on" "command-line
|
||||
switch"_Section_start.html#start_7 to enable the KOKKOS package. It
|
||||
takes additional arguments for hardware settings appropriate to your
|
||||
system. Those arguments are "documented
|
||||
here"_Section_start.html#start_7. For OpenMP use:
|
||||
|
||||
-k on t Nt :pre
|
||||
|
||||
The "t Nt" option specifies how many OpenMP threads per MPI
|
||||
task to use with a node. The default is Nt = 1, which is MPI-only mode.
|
||||
Note that the product of MPI tasks * OpenMP
|
||||
threads/task should not exceed the physical number of cores (on a
|
||||
node), otherwise performance will suffer. If hyperthreading is enabled, then
|
||||
the product of MPI tasks * OpenMP threads/task should not exceed the
|
||||
physical number of cores * hardware threads.
|
||||
The "-k on" switch also issues a "package kokkos" command (with no
|
||||
additional arguments) which sets various KOKKOS options to default
|
||||
values, as discussed on the "package"_package.html command doc page.
|
||||
|
||||
The "-sf kk" "command-line switch"_Section_start.html#start_7
|
||||
will automatically append the "/kk" suffix to styles that support it.
|
||||
In this manner no modification to the input script is needed. Alternatively,
|
||||
one can run with the KOKKOS package by editing the input script as described below.
|
||||
|
||||
NOTE: The default for the "package kokkos"_package.html command is
|
||||
to use "full" neighbor lists and set the Newton flag to "off" for both
|
||||
pairwise and bonded interactions. However, when running on CPUs, it
|
||||
will typically be faster to use "half" neighbor lists and set the
|
||||
Newton flag to "on", just as is the case for non-accelerated pair
|
||||
styles. It can also be faster to use non-threaded communication.
|
||||
Use the "-pk kokkos" "command-line switch"_Section_start.html#start_7 to
|
||||
change the default "package kokkos"_package.html
|
||||
options. See its doc page for details and default settings. Experimenting with
|
||||
its options can provide a speed-up for specific calculations. For example:
|
||||
|
||||
mpirun -np 16 lmp_kokkos_mpi_only -k on -sf kk -pk kokkos newton on neigh half comm no -in in.lj # Newton on, Half neighbor list, non-threaded comm :pre
|
||||
|
||||
If the "newton"_newton.html command is used in the input
|
||||
script, it can also override the Newton flag defaults.
|
||||
|
||||
[Core and Thread Affinity:]
|
||||
|
||||
When using multi-threading, it is important for
|
||||
performance to bind both MPI tasks to physical cores, and threads to
|
||||
physical cores, so they do not migrate during a simulation.
|
||||
|
||||
If you are not certain MPI tasks are being bound (check the defaults
|
||||
for your MPI installation), binding can be forced with these flags:
|
||||
|
||||
OpenMPI 1.8: mpirun -np 2 --bind-to socket --map-by socket ./lmp_openmpi ...
|
||||
Mvapich2 2.0: mpiexec -np 2 --bind-to socket --map-by socket ./lmp_mvapich ... :pre
|
||||
|
||||
For binding threads with KOKKOS OpenMP, use thread affinity
|
||||
environment variables to force binding. With OpenMP 3.1 (gcc 4.7 or
|
||||
later, intel 12 or later) setting the environment variable
|
||||
OMP_PROC_BIND=true should be sufficient. In general, for best performance
|
||||
with OpenMP 4.0 or better set OMP_PROC_BIND=spread and OMP_PLACES=threads.
|
||||
For binding threads with the
|
||||
KOKKOS pthreads option, compile LAMMPS the KOKKOS HWLOC=yes option
|
||||
as described below.
|
||||
|
||||
[Running on Knight's Landing (KNL) Intel Xeon Phi:]
|
||||
|
||||
Here is a quick overview of how to use the KOKKOS package
|
||||
for the Intel Knight's Landing (KNL) Xeon Phi:
|
||||
|
||||
KNL Intel Phi chips have 68 physical cores. Typically 1 to 4 cores
|
||||
are reserved for the OS, and only 64 or 66 cores are used. Each core
|
||||
has 4 hyperthreads,so there are effectively N = 256 (4*64) or
|
||||
N = 264 (4*66) cores to run on. The product of MPI tasks * OpenMP threads/task should not exceed this limit,
|
||||
otherwise performance will suffer. Note that with the KOKKOS package you do not need to
|
||||
specify how many KNLs there are per node; each
|
||||
KNL is simply treated as running some number of MPI tasks.
|
||||
|
||||
Examples of mpirun commands that follow these rules are shown below.
|
||||
|
||||
Intel KNL node with 68 cores (272 threads/node via 4x hardware threading):
|
||||
mpirun -np 64 lmp_kokkos_phi -k on t 4 -sf kk -in in.lj # 1 node, 64 MPI tasks/node, 4 threads/task
|
||||
mpirun -np 66 lmp_kokkos_phi -k on t 4 -sf kk -in in.lj # 1 node, 66 MPI tasks/node, 4 threads/task
|
||||
mpirun -np 32 lmp_kokkos_phi -k on t 8 -sf kk -in in.lj # 1 node, 32 MPI tasks/node, 8 threads/task
|
||||
mpirun -np 512 -ppn 64 lmp_kokkos_phi -k on t 4 -sf kk -in in.lj # 8 nodes, 64 MPI tasks/node, 4 threads/task :pre
|
||||
|
||||
The -np setting of the mpirun command sets the number of MPI
|
||||
tasks/node. The "-k on t Nt" command-line switch sets the number of
|
||||
threads/task as Nt. The product of these two values should be N, i.e.
|
||||
256 or 264.
|
||||
|
||||
NOTE: The default for the "package kokkos"_package.html command is
|
||||
to use "full" neighbor lists and set the Newton flag to "off" for both
|
||||
pairwise and bonded interactions. When running on KNL, this
|
||||
will typically be best for pair-wise potentials. For manybody potentials,
|
||||
using "half" neighbor lists and setting the
|
||||
Newton flag to "on" may be faster. It can also be faster to use non-threaded communication.
|
||||
Use the "-pk kokkos" "command-line switch"_Section_start.html#start_7 to
|
||||
change the default "package kokkos"_package.html
|
||||
options. See its doc page for details and default settings. Experimenting with
|
||||
its options can provide a speed-up for specific calculations. For example:
|
||||
|
||||
mpirun -np 64 lmp_kokkos_phi -k on t 4 -sf kk -pk kokkos comm no -in in.lj # Newton off, full neighbor list, non-threaded comm
|
||||
mpirun -np 64 lmp_kokkos_phi -k on t 4 -sf kk -pk kokkos newton on neigh half comm no -in in.reax # Newton on, half neighbor list, non-threaded comm :pre
|
||||
|
||||
NOTE: MPI tasks and threads should be bound to cores as described above for CPUs.
|
||||
|
||||
NOTE: To build with Kokkos support for Intel Xeon Phi coprocessors such as Knight's Corner (KNC), your
|
||||
system must be configured to use them in "native" mode, not "offload"
|
||||
mode like the USER-INTEL package supports.
|
||||
|
||||
[Running on GPUs:]
|
||||
|
||||
Use the "-k" "command-line switch"_Section_commands.html#start_7 to
|
||||
specify the number of GPUs per node. Typically the -np setting
|
||||
of the mpirun command should set the number of MPI
|
||||
tasks/node to be equal to the # of physical GPUs on the node.
|
||||
You can assign multiple MPI tasks to the same GPU with the
|
||||
KOKKOS package, but this is usually only faster if significant portions
|
||||
of the input script have not been ported to use Kokkos. Using CUDA MPS
|
||||
is recommended in this scenario. As above for multi-core CPUs (and no GPU), if N is the number
|
||||
of physical cores/node, then the number of MPI tasks/node should not exceed N.
|
||||
|
||||
-k on g Ng :pre
|
||||
|
||||
Here are examples of how to use the KOKKOS package for GPUs,
|
||||
assuming one or more nodes, each with two GPUs:
|
||||
|
||||
mpirun -np 2 lmp_kokkos_cuda_openmpi -k on g 2 -sf kk -in in.lj # 1 node, 2 MPI tasks/node, 2 GPUs/node
|
||||
mpirun -np 32 -ppn 2 lmp_kokkos_cuda_openmpi -k on g 2 -sf kk -in in.lj # 16 nodes, 2 MPI tasks/node, 2 GPUs/node (32 GPUs total) :pre
|
||||
|
||||
NOTE: The default for the "package kokkos"_package.html command is
|
||||
to use "full" neighbor lists and set the Newton flag to "off" for both
|
||||
pairwise and bonded interactions, along with threaded communication.
|
||||
When running on Maxwell or Kepler GPUs, this will typically be best. For Pascal GPUs,
|
||||
using "half" neighbor lists and setting the
|
||||
Newton flag to "on" may be faster. For many pair styles, setting the neighbor binsize
|
||||
equal to the ghost atom cutoff will give speedup.
|
||||
Use the "-pk kokkos" "command-line switch"_Section_start.html#start_7 to
|
||||
change the default "package kokkos"_package.html
|
||||
options. See its doc page for details and default settings. Experimenting with
|
||||
its options can provide a speed-up for specific calculations. For example:
|
||||
|
||||
mpirun -np 2 lmp_kokkos_cuda_openmpi -k on g 2 -sf kk -pk kokkos binsize 2.8 -in in.lj # Set binsize = neighbor ghost cutoff
|
||||
mpirun -np 2 lmp_kokkos_cuda_openmpi -k on g 2 -sf kk -pk kokkos newton on neigh half binsize 2.8 -in in.lj # Newton on, half neighborlist, set binsize = neighbor ghost cutoff :pre
|
||||
|
||||
NOTE: For good performance of the KOKKOS package on GPUs, you must
|
||||
have Kepler generation GPUs (or later). The Kokkos library exploits
|
||||
texture cache options not supported by Telsa generation GPUs (or
|
||||
older).
|
||||
|
||||
To build with Kokkos support for Intel Xeon Phi coprocessors, your
|
||||
sysmte must be configured to use them in "native" mode, not "offload"
|
||||
mode like the USER-INTEL package supports.
|
||||
NOTE: When using a GPU, you will achieve the best performance if your
|
||||
input script does not use fix or compute styles which are not yet
|
||||
Kokkos-enabled. This allows data to stay on the GPU for multiple
|
||||
timesteps, without being copied back to the host CPU. Invoking a
|
||||
non-Kokkos fix or compute, or performing I/O for
|
||||
"thermo"_thermo_style.html or "dump"_dump.html output will cause data
|
||||
to be copied back to the CPU incurring a performance penalty.
|
||||
|
||||
[Building LAMMPS with the KOKKOS package:]
|
||||
NOTE: To get an accurate timing breakdown between time spend in pair,
|
||||
kspace, etc., you must set the environment variable CUDA_LAUNCH_BLOCKING=1.
|
||||
However, this will reduce performance and is not recommended for production runs.
|
||||
|
||||
You must choose at build time whether to build for CPUs (OpenMP),
|
||||
GPUs, or Phi.
|
||||
[Run with the KOKKOS package by editing an input script:]
|
||||
|
||||
You can do any of these in one line, using the suitable make command
|
||||
line flags as described in "Section 4"_Section_packages.html of the
|
||||
manual. If run from the src directory, these
|
||||
commands will create src/lmp_kokkos_omp, lmp_kokkos_cuda_mpi, and
|
||||
lmp_kokkos_phi. Note that the OMP and PHI options use
|
||||
src/MAKE/Makefile.mpi as the starting Makefile.machine. The CUDA
|
||||
option uses src/MAKE/OPTIONS/Makefile.kokkos_cuda_mpi.
|
||||
|
||||
The latter two steps can be done using the "-k on", "-pk kokkos" and
|
||||
"-sf kk" "command-line switches"_Section_start.html#start_6
|
||||
respectively. Or the effect of the "-pk" or "-sf" switches can be
|
||||
Alternatively the effect of the "-sf" or "-pk" switches can be
|
||||
duplicated by adding the "package kokkos"_package.html or "suffix
|
||||
kk"_suffix.html commands respectively to your input script.
|
||||
kk"_suffix.html commands to your input script.
|
||||
|
||||
|
||||
Or you can follow these steps:
|
||||
|
||||
CPU-only (run all-MPI or with OpenMP threading):
|
||||
|
||||
cd lammps/src
|
||||
make yes-kokkos
|
||||
make kokkos_omp :pre
|
||||
|
||||
CPU-only (only MPI, no threading):
|
||||
|
||||
cd lammps/src
|
||||
make yes-kokkos
|
||||
make kokkos_mpi_only :pre
|
||||
|
||||
Intel Xeon Phi (Intel Compiler, Intel MPI):
|
||||
|
||||
cd lammps/src
|
||||
make yes-kokkos
|
||||
make kokkos_phi :pre
|
||||
|
||||
CPUs and GPUs (with MPICH or OpenMPI):
|
||||
|
||||
cd lammps/src
|
||||
make yes-kokkos
|
||||
make kokkos_cuda_mpi :pre
|
||||
|
||||
These examples set the KOKKOS-specific OMP, MIC, CUDA variables on the
|
||||
make command line which requires a GNU-compatible make command. Try
|
||||
"gmake" if your system's standard make complains.
|
||||
|
||||
NOTE: If you build using make line variables and re-build LAMMPS twice
|
||||
with different KOKKOS options and the *same* target, e.g. g++ in the
|
||||
first two examples above, then you *must* perform a "make clean-all"
|
||||
or "make clean-machine" before each build. This is to force all the
|
||||
KOKKOS-dependent files to be re-compiled with the new options.
|
||||
|
||||
NOTE: Currently, there are no precision options with the KOKKOS
|
||||
package. All compilation and computation is performed in double
|
||||
precision.
|
||||
|
||||
There are other allowed options when building with the KOKKOS package.
|
||||
As above, they can be set either as variables on the make command line
|
||||
or in Makefile.machine. This is the full list of options, including
|
||||
those discussed above, Each takes a value shown below. The
|
||||
default value is listed, which is set in the
|
||||
lib/kokkos/Makefile.kokkos file.
|
||||
|
||||
#Default settings specific options
|
||||
#Options: force_uvm,use_ldg,rdc
|
||||
|
||||
KOKKOS_DEVICES, values = {OpenMP}, {Serial}, {Pthreads}, {Cuda}, default = {OpenMP}
|
||||
KOKKOS_ARCH, values = {KNC}, {SNB}, {HSW}, {Kepler}, {Kepler30}, {Kepler32}, {Kepler35}, {Kepler37}, {Maxwell}, {Maxwell50}, {Maxwell52}, {Maxwell53}, {ARMv8}, {BGQ}, {Power7}, {Power8}, default = {none}
|
||||
KOKKOS_DEBUG, values = {yes}, {no}, default = {no}
|
||||
KOKKOS_USE_TPLS, values = {hwloc}, {librt}, default = {none}
|
||||
KOKKOS_CUDA_OPTIONS, values = {force_uvm}, {use_ldg}, {rdc} :ul
|
||||
|
||||
KOKKOS_DEVICE sets the parallelization method used for Kokkos code
|
||||
(within LAMMPS). KOKKOS_DEVICES=OpenMP means that OpenMP will be
|
||||
used. KOKKOS_DEVICES=Pthreads means that pthreads will be used.
|
||||
KOKKOS_DEVICES=Cuda means an NVIDIA GPU running CUDA will be used.
|
||||
|
||||
If KOKKOS_DEVICES=Cuda, then the lo-level Makefile in the src/MAKE
|
||||
directory must use "nvcc" as its compiler, via its CC setting. For
|
||||
best performance its CCFLAGS setting should use -O3 and have a
|
||||
KOKKOS_ARCH setting that matches the compute capability of your NVIDIA
|
||||
hardware and software installation, e.g. KOKKOS_ARCH=Kepler30. Note
|
||||
the minimal required compute capability is 2.0, but this will give
|
||||
significantly reduced performance compared to Kepler generation GPUs
|
||||
with compute capability 3.x. For the LINK setting, "nvcc" should not
|
||||
be used; instead use g++ or another compiler suitable for linking C++
|
||||
applications. Often you will want to use your MPI compiler wrapper
|
||||
for this setting (i.e. mpicxx). Finally, the lo-level Makefile must
|
||||
also have a "Compilation rule" for creating *.o files from *.cu files.
|
||||
See src/Makefile.cuda for an example of a lo-level Makefile with all
|
||||
of these settings.
|
||||
|
||||
KOKKOS_USE_TPLS=hwloc binds threads to hardware cores, so they do not
|
||||
migrate during a simulation. KOKKOS_USE_TPLS=hwloc should always be
|
||||
used if running with KOKKOS_DEVICES=Pthreads for pthreads. It is not
|
||||
necessary for KOKKOS_DEVICES=OpenMP for OpenMP, because OpenMP
|
||||
provides alternative methods via environment variables for binding
|
||||
threads to hardware cores. More info on binding threads to cores is
|
||||
given in "Section 5.3"_Section_accelerate.html#acc_3.
|
||||
|
||||
KOKKOS_ARCH=KNC enables compiler switches needed when compiling for an
|
||||
Intel Phi processor.
|
||||
|
||||
KOKKOS_USE_TPLS=librt enables use of a more accurate timer mechanism
|
||||
on most Unix platforms. This library is not available on all
|
||||
platforms.
|
||||
|
||||
KOKKOS_DEBUG is only useful when developing a Kokkos-enabled style
|
||||
within LAMMPS. KOKKOS_DEBUG=yes enables printing of run-time
|
||||
debugging information that can be useful. It also enables runtime
|
||||
bounds checking on Kokkos data structures.
|
||||
|
||||
KOKKOS_CUDA_OPTIONS are additional options for CUDA.
|
||||
|
||||
For more information on Kokkos see the Kokkos programmers' guide here:
|
||||
/lib/kokkos/doc/Kokkos_PG.pdf.
|
||||
|
||||
[Run with the KOKKOS package from the command line:]
|
||||
|
||||
The mpirun or mpiexec command sets the total number of MPI tasks used
|
||||
by LAMMPS (one or multiple per compute node) and the number of MPI
|
||||
tasks used per node. E.g. the mpirun command in MPICH does this via
|
||||
its -np and -ppn switches. Ditto for OpenMPI via -np and -npernode.
|
||||
|
||||
When using KOKKOS built with host=OMP, you need to choose how many
|
||||
OpenMP threads per MPI task will be used (via the "-k" command-line
|
||||
switch discussed below). Note that the product of MPI tasks * OpenMP
|
||||
threads/task should not exceed the physical number of cores (on a
|
||||
node), otherwise performance will suffer.
|
||||
|
||||
When using the KOKKOS package built with device=CUDA, you must use
|
||||
exactly one MPI task per physical GPU.
|
||||
|
||||
When using the KOKKOS package built with host=MIC for Intel Xeon Phi
|
||||
coprocessor support you need to insure there are one or more MPI tasks
|
||||
per coprocessor, and choose the number of coprocessor threads to use
|
||||
per MPI task (via the "-k" command-line switch discussed below). The
|
||||
product of MPI tasks * coprocessor threads/task should not exceed the
|
||||
maximum number of threads the coprocessor is designed to run,
|
||||
otherwise performance will suffer. This value is 240 for current
|
||||
generation Xeon Phi(TM) chips, which is 60 physical cores * 4
|
||||
threads/core. Note that with the KOKKOS package you do not need to
|
||||
specify how many Phi coprocessors there are per node; each
|
||||
coprocessors is simply treated as running some number of MPI tasks.
|
||||
|
||||
You must use the "-k on" "command-line
|
||||
switch"_Section_start.html#start_6 to enable the KOKKOS package. It
|
||||
takes additional arguments for hardware settings appropriate to your
|
||||
system. Those arguments are "documented
|
||||
here"_Section_start.html#start_6. The two most commonly used
|
||||
options are:
|
||||
|
||||
-k on t Nt g Ng :pre
|
||||
|
||||
The "t Nt" option applies to host=OMP (even if device=CUDA) and
|
||||
host=MIC. For host=OMP, it specifies how many OpenMP threads per MPI
|
||||
task to use with a node. For host=MIC, it specifies how many Xeon Phi
|
||||
threads per MPI task to use within a node. The default is Nt = 1.
|
||||
Note that for host=OMP this is effectively MPI-only mode which may be
|
||||
fine. But for host=MIC you will typically end up using far less than
|
||||
all the 240 available threads, which could give very poor performance.
|
||||
|
||||
The "g Ng" option applies to device=CUDA. It specifies how many GPUs
|
||||
per compute node to use. The default is 1, so this only needs to be
|
||||
specified is you have 2 or more GPUs per compute node.
|
||||
|
||||
The "-k on" switch also issues a "package kokkos" command (with no
|
||||
additional arguments) which sets various KOKKOS options to default
|
||||
values, as discussed on the "package"_package.html command doc page.
|
||||
|
||||
Use the "-sf kk" "command-line switch"_Section_start.html#start_6,
|
||||
which will automatically append "kk" to styles that support it. Use
|
||||
the "-pk kokkos" "command-line switch"_Section_start.html#start_6 if
|
||||
you wish to change any of the default "package kokkos"_package.html
|
||||
optionns set by the "-k on" "command-line
|
||||
switch"_Section_start.html#start_6.
|
||||
|
||||
|
||||
|
||||
Note that the default for the "package kokkos"_package.html command is
|
||||
to use "full" neighbor lists and set the Newton flag to "off" for both
|
||||
pairwise and bonded interactions. This typically gives fastest
|
||||
performance. If the "newton"_newton.html command is used in the input
|
||||
script, it can override the Newton flag defaults.
|
||||
|
||||
However, when running in MPI-only mode with 1 thread per MPI task, it
|
||||
will typically be faster to use "half" neighbor lists and set the
|
||||
Newton flag to "on", just as is the case for non-accelerated pair
|
||||
styles. You can do this with the "-pk" "command-line
|
||||
switch"_Section_start.html#start_6.
|
||||
|
||||
[Or run with the KOKKOS package by editing an input script:]
|
||||
|
||||
The discussion above for the mpirun/mpiexec command and setting
|
||||
appropriate thread and GPU values for host=OMP or host=MIC or
|
||||
device=CUDA are the same.
|
||||
The discussion above for building LAMMPS with the KOKKOS package, the mpirun/mpiexec command, and setting
|
||||
appropriate thread are the same.
|
||||
|
||||
You must still use the "-k on" "command-line
|
||||
switch"_Section_start.html#start_6 to enable the KOKKOS package, and
|
||||
switch"_Section_start.html#start_7 to enable the KOKKOS package, and
|
||||
specify its additional arguments for hardware options appropriate to
|
||||
your system, as documented above.
|
||||
|
||||
Use the "suffix kk"_suffix.html command, or you can explicitly add a
|
||||
You can use the "suffix kk"_suffix.html command, or you can explicitly add a
|
||||
"kk" suffix to individual styles in your input script, e.g.
|
||||
|
||||
pair_style lj/cut/kk 2.5 :pre
|
||||
|
||||
You only need to use the "package kokkos"_package.html command if you
|
||||
wish to change any of its option defaults, as set by the "-k on"
|
||||
"command-line switch"_Section_start.html#start_6.
|
||||
"command-line switch"_Section_start.html#start_7.
|
||||
|
||||
[Using OpenMP threading and CUDA together (experimental):]
|
||||
|
||||
With the KOKKOS package, both OpenMP multi-threading and GPUs can be used
|
||||
together in a few special cases. In the Makefile, the KOKKOS_DEVICES variable must
|
||||
include both "Cuda" and "OpenMP", as is the case for /src/MAKE/OPTIONS/Makefile.kokkos_cuda_mpi
|
||||
|
||||
KOKKOS_DEVICES=Cuda,OpenMP :pre
|
||||
|
||||
The suffix "/kk" is equivalent to "/kk/device", and for Kokkos CUDA,
|
||||
using the "-sf kk" in the command line gives the default CUDA version everywhere.
|
||||
However, if the "/kk/host" suffix is added to a specific style in the input
|
||||
script, the Kokkos OpenMP (CPU) version of that specific style will be used instead.
|
||||
Set the number of OpenMP threads as "t Nt" and the number of GPUs as "g Ng"
|
||||
|
||||
-k on t Nt g Ng :pre
|
||||
|
||||
For example, the command to run with 1 GPU and 8 OpenMP threads is then:
|
||||
|
||||
mpiexec -np 1 lmp_kokkos_cuda_openmpi -in in.lj -k on g 1 t 8 -sf kk :pre
|
||||
|
||||
Conversely, if the "-sf kk/host" is used in the command line and then the
|
||||
"/kk" or "/kk/device" suffix is added to a specific style in your input script,
|
||||
then only that specific style will run on the GPU while everything else will
|
||||
run on the CPU in OpenMP mode. Note that the execution of the CPU and GPU
|
||||
styles will NOT overlap, except for a special case:
|
||||
|
||||
A kspace style and/or molecular topology (bonds, angles, etc.) running on
|
||||
the host CPU can overlap with a pair style running on the GPU. First compile
|
||||
with "--default-stream per-thread" added to CCFLAGS in the Kokkos CUDA Makefile.
|
||||
Then explicitly use the "/kk/host" suffix for kspace and bonds, angles, etc.
|
||||
in the input file and the "kk" suffix (equal to "kk/device") on the command line.
|
||||
Also make sure the environment variable CUDA_LAUNCH_BLOCKING is not set to "1"
|
||||
so CPU/GPU overlap can occur.
|
||||
|
||||
[Speed-ups to expect:]
|
||||
|
||||
@ -363,7 +373,7 @@ package. :l
|
||||
When running large number of atoms per GPU, KOKKOS is typically faster
|
||||
than the GPU package. :l
|
||||
|
||||
When running on Intel Xeon Phi, KOKKOS is not as fast as
|
||||
When running on Intel hardware, KOKKOS is not as fast as
|
||||
the USER-INTEL package, which is optimized for that hardware. :l
|
||||
:ule
|
||||
|
||||
@ -371,123 +381,78 @@ See the "Benchmark page"_http://lammps.sandia.gov/bench.html of the
|
||||
LAMMPS web site for performance of the KOKKOS package on different
|
||||
hardware.
|
||||
|
||||
[Guidelines for best performance:]
|
||||
[Advanced Kokkos options:]
|
||||
|
||||
Here are guidline for using the KOKKOS package on the different
|
||||
hardware configurations listed above.
|
||||
There are other allowed options when building with the KOKKOS package.
|
||||
As above, they can be set either as variables on the make command line
|
||||
or in Makefile.machine. This is the full list of options, including
|
||||
those discussed above. Each takes a value shown below. The
|
||||
default value is listed, which is set in the
|
||||
/lib/kokkos/Makefile.kokkos file.
|
||||
|
||||
Many of the guidelines use the "package kokkos"_package.html command
|
||||
See its doc page for details and default settings. Experimenting with
|
||||
its options can provide a speed-up for specific calculations.
|
||||
KOKKOS_DEVICES, values = {Serial}, {OpenMP}, {Pthreads}, {Cuda}, default = {OpenMP}
|
||||
KOKKOS_ARCH, values = {KNC}, {SNB}, {HSW}, {Kepler30}, {Kepler32}, {Kepler35}, {Kepler37}, {Maxwell50}, {Maxwell52}, {Maxwell53}, {Pascal60}, {Pascal61}, {ARMv80}, {ARMv81}, {ARMv81}, {ARMv8-ThunderX}, {BGQ}, {Power7}, {Power8}, {Power9}, {KNL}, {BDW}, {SKX}, default = {none}
|
||||
KOKKOS_DEBUG, values = {yes}, {no}, default = {no}
|
||||
KOKKOS_USE_TPLS, values = {hwloc}, {librt}, {experimental_memkind}, default = {none}
|
||||
KOKKOS_CXX_STANDARD, values = {c++11}, {c++1z}, default = {c++11}
|
||||
KOKKOS_OPTIONS, values = {aggressive_vectorization}, {disable_profiling}, default = {none}
|
||||
KOKKOS_CUDA_OPTIONS, values = {force_uvm}, {use_ldg}, {rdc}, {enable_lambda}, default = {enable_lambda} :ul
|
||||
|
||||
[Running on a multi-core CPU:]
|
||||
KOKKOS_DEVICES sets the parallelization method used for Kokkos code
|
||||
(within LAMMPS). KOKKOS_DEVICES=Serial means that no threading will be used.
|
||||
KOKKOS_DEVICES=OpenMP means that OpenMP threading will be
|
||||
used. KOKKOS_DEVICES=Pthreads means that pthreads will be used.
|
||||
KOKKOS_DEVICES=Cuda means an NVIDIA GPU running CUDA will be used.
|
||||
|
||||
If N is the number of physical cores/node, then the number of MPI
|
||||
tasks/node * number of threads/task should not exceed N, and should
|
||||
typically equal N. Note that the default threads/task is 1, as set by
|
||||
the "t" keyword of the "-k" "command-line
|
||||
switch"_Section_start.html#start_6. If you do not change this, no
|
||||
additional parallelism (beyond MPI) will be invoked on the host
|
||||
CPU(s).
|
||||
KOKKOS_ARCH enables compiler switches needed when compiling for a
|
||||
specific hardware:
|
||||
|
||||
You can compare the performance running in different modes:
|
||||
ARMv80 = ARMv8.0 Compatible CPU
|
||||
ARMv81 = ARMv8.1 Compatible CPU
|
||||
ARMv8-ThunderX = ARMv8 Cavium ThunderX CPU
|
||||
SNB = Intel Sandy/Ivy Bridge CPUs
|
||||
HSW = Intel Haswell CPUs
|
||||
BDW = Intel Broadwell Xeon E-class CPUs
|
||||
SKX = Intel Sky Lake Xeon E-class HPC CPUs (AVX512)
|
||||
KNC = Intel Knights Corner Xeon Phi
|
||||
KNL = Intel Knights Landing Xeon Phi
|
||||
Kepler30 = NVIDIA Kepler generation CC 3.0
|
||||
Kepler32 = NVIDIA Kepler generation CC 3.2
|
||||
Kepler35 = NVIDIA Kepler generation CC 3.5
|
||||
Kepler37 = NVIDIA Kepler generation CC 3.7
|
||||
Maxwell50 = NVIDIA Maxwell generation CC 5.0
|
||||
Maxwell52 = NVIDIA Maxwell generation CC 5.2
|
||||
Maxwell53 = NVIDIA Maxwell generation CC 5.3
|
||||
Pascal60 = NVIDIA Pascal generation CC 6.0
|
||||
Pascal61 = NVIDIA Pascal generation CC 6.1
|
||||
BGQ = IBM Blue Gene/Q CPUs
|
||||
Power8 = IBM POWER8 CPUs
|
||||
Power9 = IBM POWER9 CPUs :ul
|
||||
|
||||
run with 1 MPI task/node and N threads/task
|
||||
run with N MPI tasks/node and 1 thread/task
|
||||
run with settings in between these extremes :ul
|
||||
KOKKOS_USE_TPLS=hwloc binds threads to hardware cores, so they do not
|
||||
migrate during a simulation. KOKKOS_USE_TPLS=hwloc should always be
|
||||
used if running with KOKKOS_DEVICES=Pthreads for pthreads. It is not
|
||||
necessary for KOKKOS_DEVICES=OpenMP for OpenMP, because OpenMP
|
||||
provides alternative methods via environment variables for binding
|
||||
threads to hardware cores. More info on binding threads to cores is
|
||||
given in "Section 5.3"_Section_accelerate.html#acc_3.
|
||||
|
||||
Examples of mpirun commands in these modes are shown above.
|
||||
KOKKOS_USE_TPLS=librt enables use of a more accurate timer mechanism
|
||||
on most Unix platforms. This library is not available on all
|
||||
platforms.
|
||||
|
||||
When using KOKKOS to perform multi-threading, it is important for
|
||||
performance to bind both MPI tasks to physical cores, and threads to
|
||||
physical cores, so they do not migrate during a simulation.
|
||||
KOKKOS_DEBUG is only useful when developing a Kokkos-enabled style
|
||||
within LAMMPS. KOKKOS_DEBUG=yes enables printing of run-time
|
||||
debugging information that can be useful. It also enables runtime
|
||||
bounds checking on Kokkos data structures.
|
||||
|
||||
If you are not certain MPI tasks are being bound (check the defaults
|
||||
for your MPI installation), binding can be forced with these flags:
|
||||
KOKKOS_CXX_STANDARD and KOKKOS_OPTIONS are typically not changed when building LAMMPS.
|
||||
|
||||
OpenMPI 1.8: mpirun -np 2 -bind-to socket -map-by socket ./lmp_openmpi ...
|
||||
Mvapich2 2.0: mpiexec -np 2 -bind-to socket -map-by socket ./lmp_mvapich ... :pre
|
||||
|
||||
For binding threads with the KOKKOS OMP option, use thread affinity
|
||||
environment variables to force binding. With OpenMP 3.1 (gcc 4.7 or
|
||||
later, intel 12 or later) setting the environment variable
|
||||
OMP_PROC_BIND=true should be sufficient. For binding threads with the
|
||||
KOKKOS pthreads option, compile LAMMPS the KOKKOS HWLOC=yes option
|
||||
(see "this section"_Section_packages.html#KOKKOS of the manual for
|
||||
details).
|
||||
|
||||
[Running on GPUs:]
|
||||
|
||||
Insure the -arch setting in the machine makefile you are using,
|
||||
e.g. src/MAKE/Makefile.cuda, is correct for your GPU hardware/software.
|
||||
(see "this section"_Section_packages.html#KOKKOS of the manual for
|
||||
details).
|
||||
|
||||
The -np setting of the mpirun command should set the number of MPI
|
||||
tasks/node to be equal to the # of physical GPUs on the node.
|
||||
|
||||
Use the "-k" "command-line switch"_Section_commands.html#start_6 to
|
||||
specify the number of GPUs per node, and the number of threads per MPI
|
||||
task. As above for multi-core CPUs (and no GPU), if N is the number
|
||||
of physical cores/node, then the number of MPI tasks/node * number of
|
||||
threads/task should not exceed N. With one GPU (and one MPI task) it
|
||||
may be faster to use less than all the available cores, by setting
|
||||
threads/task to a smaller value. This is because using all the cores
|
||||
on a dual-socket node will incur extra cost to copy memory from the
|
||||
2nd socket to the GPU.
|
||||
|
||||
Examples of mpirun commands that follow these rules are shown above.
|
||||
|
||||
NOTE: When using a GPU, you will achieve the best performance if your
|
||||
input script does not use any fix or compute styles which are not yet
|
||||
Kokkos-enabled. This allows data to stay on the GPU for multiple
|
||||
timesteps, without being copied back to the host CPU. Invoking a
|
||||
non-Kokkos fix or compute, or performing I/O for
|
||||
"thermo"_thermo_style.html or "dump"_dump.html output will cause data
|
||||
to be copied back to the CPU.
|
||||
|
||||
You cannot yet assign multiple MPI tasks to the same GPU with the
|
||||
KOKKOS package. We plan to support this in the future, similar to the
|
||||
GPU package in LAMMPS.
|
||||
|
||||
You cannot yet use both the host (multi-threaded) and device (GPU)
|
||||
together to compute pairwise interactions with the KOKKOS package. We
|
||||
hope to support this in the future, similar to the GPU package in
|
||||
LAMMPS.
|
||||
|
||||
[Running on an Intel Phi:]
|
||||
|
||||
Kokkos only uses Intel Phi processors in their "native" mode, i.e.
|
||||
not hosted by a CPU.
|
||||
|
||||
As illustrated above, build LAMMPS with OMP=yes (the default) and
|
||||
MIC=yes. The latter insures code is correctly compiled for the Intel
|
||||
Phi. The OMP setting means OpenMP will be used for parallelization on
|
||||
the Phi, which is currently the best option within Kokkos. In the
|
||||
future, other options may be added.
|
||||
|
||||
Current-generation Intel Phi chips have either 61 or 57 cores. One
|
||||
core should be excluded for running the OS, leaving 60 or 56 cores.
|
||||
Each core is hyperthreaded, so there are effectively N = 240 (4*60) or
|
||||
N = 224 (4*56) cores to run on.
|
||||
|
||||
The -np setting of the mpirun command sets the number of MPI
|
||||
tasks/node. The "-k on t Nt" command-line switch sets the number of
|
||||
threads/task as Nt. The product of these 2 values should be N, i.e.
|
||||
240 or 224. Also, the number of threads/task should be a multiple of
|
||||
4 so that logical threads from more than one MPI task do not run on
|
||||
the same physical core.
|
||||
|
||||
Examples of mpirun commands that follow these rules are shown above.
|
||||
KOKKOS_CUDA_OPTIONS are additional options for CUDA. The LAMMPS KOKKOS package must be compiled
|
||||
with the {enable_lambda} option when using GPUs.
|
||||
|
||||
[Restrictions:]
|
||||
|
||||
As noted above, if using GPUs, the number of MPI tasks per compute
|
||||
node should equal to the number of GPUs per compute node. In the
|
||||
future Kokkos will support assigning multiple MPI tasks to a single
|
||||
GPU.
|
||||
|
||||
Currently Kokkos does not support AMD GPUs due to limits in the
|
||||
available backend programming models. Specifically, Kokkos requires
|
||||
extensive C++ support from the Kernel language. This is expected to
|
||||
change in the future.
|
||||
Currently, there are no precision options with the KOKKOS
|
||||
package. All compilation and computation is performed in double
|
||||
precision.
|
||||
|
||||
@ -9,6 +9,7 @@
|
||||
angle_style class2 command :h3
|
||||
angle_style class2/omp command :h3
|
||||
angle_style class2/kk command :h3
|
||||
angle_style class2/p6 command :h3
|
||||
|
||||
[Syntax:]
|
||||
|
||||
@ -102,11 +103,29 @@ more instructions on how to use the accelerated styles effectively.
|
||||
|
||||
:line
|
||||
|
||||
The {class2/p6} angle style uses the {class2} potential expanded to sixth order:
|
||||
|
||||
:c,image(Eqs/angle_class2_p6.jpg)
|
||||
|
||||
In this expanded term 6 coefficients for the Ea formula need to be set:
|
||||
|
||||
theta0 (degrees)
|
||||
K2 (energy/radian^2)
|
||||
K3 (energy/radian^3)
|
||||
K4 (energy/radian^4)
|
||||
K5 (energy/radian^5)
|
||||
K6 (energy/radian^6) :ul
|
||||
|
||||
The bond-bond and bond-angle terms remain unchanged.
|
||||
|
||||
:line
|
||||
|
||||
[Restrictions:]
|
||||
|
||||
This angle style can only be used if LAMMPS was built with the CLASS2
|
||||
package. See the "Making LAMMPS"_Section_start.html#start_3 section
|
||||
for more info on packages.
|
||||
package. For the {class2/p6} style LAMMPS needs to be built with the
|
||||
USER-MOFFF package. See the "Making LAMMPS"_Section_start.html#start_3
|
||||
section for more info on packages.
|
||||
|
||||
[Related commands:]
|
||||
|
||||
|
||||
65
doc/src/angle_cosine_buck6d.txt
Normal file
@ -0,0 +1,65 @@
|
||||
"LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c
|
||||
|
||||
:link(lws,http://lammps.sandia.gov)
|
||||
:link(ld,Manual.html)
|
||||
:link(lc,Section_commands.html#comm)
|
||||
|
||||
:line
|
||||
|
||||
angle_style cosine/buck6d command :h3
|
||||
|
||||
[Syntax:]
|
||||
|
||||
angle_style cosine/buck6d :pre
|
||||
|
||||
[Examples:]
|
||||
|
||||
angle_style cosine/buck6d
|
||||
angle_coeff 1 cosine/buck6d 1.978350 4 180.000000 :pre
|
||||
|
||||
[Description:]
|
||||
|
||||
The {cosine/buck6d} angle style uses the potential
|
||||
|
||||
:c,image(Eqs/angle_cosine_buck6d.jpg)
|
||||
|
||||
where K is the energy constant, n is the periodic multiplicity and
|
||||
Theta0 is the equilibrium angle.
|
||||
|
||||
The coefficients must be defined for each angle type via the
|
||||
"angle_coeff"_angle_coeff.html command as in the example above, or in
|
||||
the data file or restart files read by the "read_data"_read_data.html
|
||||
or "read_restart"_read_restart.html commands in the following order:
|
||||
|
||||
K (energy)
|
||||
n
|
||||
Theta0 (degrees) :ul
|
||||
|
||||
Theta0 is specified in degrees, but LAMMPS converts it to radians
|
||||
internally.
|
||||
|
||||
Additional to the cosine term the {cosine/buck6d} angle style computes
|
||||
the short range (vdW) interaction belonging to the
|
||||
"pair_buck6d"_pair_buck6d_coul_gauss.html between the end atoms of
|
||||
the angle. For this reason this angle style only works in combination
|
||||
with the "pair_buck6d"_pair_buck6d_coul_gauss.html styles and needs
|
||||
the "special_bonds"_special_bonds.html 1-3 interactions to be weighted
|
||||
0.0 to prevent double counting.
|
||||
|
||||
:line
|
||||
|
||||
[Restrictions:]
|
||||
|
||||
{cosine/buck6d} can only be used in combination with the
|
||||
"pair_buck6d"_pair_buck6d_coul_gauss.html style and with a
|
||||
"special_bonds"_special_bonds.html 0.0 weighting of 1-3 interactions.
|
||||
|
||||
This angle style can only be used if LAMMPS was built with the
|
||||
USER-MOFFF package. See the "Making
|
||||
LAMMPS"_Section_start.html#start_3 section for more info on packages.
|
||||
|
||||
[Related commands:]
|
||||
|
||||
"angle_coeff"_angle_coeff.html
|
||||
|
||||
[Default:] none
|
||||
@ -8,6 +8,7 @@ Angle Styles :h1
|
||||
angle_charmm
|
||||
angle_class2
|
||||
angle_cosine
|
||||
angle_cosine_buck6d
|
||||
angle_cosine_delta
|
||||
angle_cosine_periodic
|
||||
angle_cosine_shift
|
||||
|
||||
@ -16,7 +16,7 @@ atom_modify keyword values ... :pre
|
||||
one or more keyword/value pairs may be appended :ulb,l
|
||||
keyword = {id} or {map} or {first} or {sort} :l
|
||||
{id} value = {yes} or {no}
|
||||
{map} value = {array} or {hash}
|
||||
{map} value = {yes} or {array} or {hash}
|
||||
{first} value = group-ID = group whose atoms will appear first in internal atom lists
|
||||
{sort} values = Nfreq binsize
|
||||
Nfreq = sort atoms spatially every this many time steps
|
||||
@ -25,8 +25,8 @@ keyword = {id} or {map} or {first} or {sort} :l
|
||||
|
||||
[Examples:]
|
||||
|
||||
atom_modify map hash
|
||||
atom_modify map array sort 10000 2.0
|
||||
atom_modify map yes
|
||||
atom_modify map hash sort 10000 2.0
|
||||
atom_modify first colloid :pre
|
||||
|
||||
[Description:]
|
||||
@ -62,29 +62,33 @@ switch. This is described in "Section 2.2"_Section_start.html#start_2
|
||||
of the manual. If atom IDs are not used, they must be specified as 0
|
||||
for all atoms, e.g. in a data or restart file.
|
||||
|
||||
The {map} keyword determines how atom ID lookup is done for molecular
|
||||
atom styles. Lookups are performed by bond (angle, etc) routines in
|
||||
LAMMPS to find the local atom index associated with a global atom ID.
|
||||
The {map} keyword determines how atoms with specific IDs are found
|
||||
when required. An example are the bond (angle, etc) methods which
|
||||
need to find the local index of an atom with a specific global ID
|
||||
which is a bond (angle, etc) partner. LAMMPS performs this operation
|
||||
efficiently by creating a "map", which is either an {array} or {hash}
|
||||
table, as descibed below.
|
||||
|
||||
When the {array} value is used, each processor stores a lookup table
|
||||
of length N, where N is the largest atom ID in the system. This is a
|
||||
When the {map} keyword is not specified in your input script, LAMMPS
|
||||
only creates a map for "atom_styles"_atom_style.html for molecular
|
||||
systems which have permanent bonds (angles, etc). No map is created
|
||||
for atomic systems, since it is normally not needed. However some
|
||||
LAMMPS commands require a map, even for atomic systems, and will
|
||||
generate an error if one does not exist. The {map} keyword thus
|
||||
allows you to force the creation of a map. The {yes} value will
|
||||
create either an {array} or {hash} style map, as explained in the next
|
||||
paragraph. The {array} and {hash} values create an atom-style or
|
||||
hash-style map respectively.
|
||||
|
||||
For an {array}-style map, each processor stores a lookup table of
|
||||
length N, where N is the largest atom ID in the system. This is a
|
||||
fast, simple method for many simulations, but requires too much memory
|
||||
for large simulations. The {hash} value uses a hash table to perform
|
||||
the lookups. This can be slightly slower than the {array} method, but
|
||||
its memory cost is proportional to the number of atoms owned by a
|
||||
processor, i.e. N/P when N is the total number of atoms in the system
|
||||
and P is the number of processors.
|
||||
|
||||
When this setting is not specified in your input script, LAMMPS
|
||||
creates a map, if one is needed, as an array or hash. See the
|
||||
discussion of default values below for how LAMMPS chooses which kind
|
||||
of map to build. Note that atomic systems do not normally need to
|
||||
create a map. However, even in this case some LAMMPS commands will
|
||||
create a map to find atoms (and then destroy it), or require a
|
||||
permanent map. An example of the former is the "velocity loop
|
||||
all"_velocity.html command, which uses a map when looping over all
|
||||
atoms and insuring the same velocity values are assigned to an atom
|
||||
ID, no matter which processor owns it.
|
||||
for large simulations. For a {hash}-style map, a hash table is
|
||||
created on each processor, which finds an atom ID in constant time
|
||||
(independent of the global number of atom IDs). It can be slightly
|
||||
slower than the {array} map, but its memory cost is proportional to
|
||||
the number of atoms owned by a processor, i.e. N/P when N is the total
|
||||
number of atoms in the system and P is the number of processors.
|
||||
|
||||
The {first} keyword allows a "group"_group.html to be specified whose
|
||||
atoms will be maintained as the first atoms in each processor's list
|
||||
|
||||
@ -261,7 +261,7 @@ For images created by the "dump image"_dump_image.html command, if the
|
||||
polygon consisting of N line segments. Note that the line segments
|
||||
are drawn between the N vertices, which does not correspond exactly to
|
||||
the physical extent of the body (because the "pair_style
|
||||
rounded/polygon"_pair_body_rounded_polygon.cpp defines finite-size
|
||||
rounded/polygon"_pair_body_rounded_polygon.html defines finite-size
|
||||
spheres at those point and the line segments between the spheres are
|
||||
tangent to the spheres). The drawn diameter of each line segment is
|
||||
determined by the {bflag1} parameter for the {body} keyword. The
|
||||
|
||||
73
doc/src/bond_gromos.txt
Normal file
@ -0,0 +1,73 @@
|
||||
"LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c
|
||||
|
||||
:link(lws,http://lammps.sandia.gov)
|
||||
:link(ld,Manual.html)
|
||||
:link(lc,Section_commands.html#comm)
|
||||
|
||||
:line
|
||||
|
||||
bond_style gromos command :h3
|
||||
bond_style gromos/omp command :h3
|
||||
|
||||
[Syntax:]
|
||||
|
||||
bond_style gromos :pre
|
||||
|
||||
[Examples:]
|
||||
|
||||
bond_style gromos
|
||||
bond_coeff 5 80.0 1.2 :pre
|
||||
|
||||
[Description:]
|
||||
|
||||
The {gromos} bond style uses the potential
|
||||
|
||||
:c,image(Eqs/bond_gromos.jpg)
|
||||
|
||||
where r0 is the equilibrium bond distance. Note that the usual 1/4
|
||||
factor is included in K.
|
||||
|
||||
The following coefficients must be defined for each bond type via the
|
||||
"bond_coeff"_bond_coeff.html command as in the example above, or in
|
||||
the data file or restart files read by the "read_data"_read_data.html
|
||||
or "read_restart"_read_restart.html commands:
|
||||
|
||||
K (energy/distance^4)
|
||||
r0 (distance) :ul
|
||||
|
||||
:line
|
||||
|
||||
Styles with a {gpu}, {intel}, {kk}, {omp}, or {opt} suffix are
|
||||
functionally the same as the corresponding style without the suffix.
|
||||
They have been optimized to run faster, depending on your available
|
||||
hardware, as discussed in "Section 5"_Section_accelerate.html
|
||||
of the manual. The accelerated styles take the same arguments and
|
||||
should produce the same results, except for round-off and precision
|
||||
issues.
|
||||
|
||||
These accelerated styles are part of the GPU, USER-INTEL, KOKKOS,
|
||||
USER-OMP and OPT packages, respectively. They are only enabled if
|
||||
LAMMPS was built with those packages. See the "Making
|
||||
LAMMPS"_Section_start.html#start_3 section for more info.
|
||||
|
||||
You can specify the accelerated styles explicitly in your input script
|
||||
by including their suffix, or you can use the "-suffix command-line
|
||||
switch"_Section_start.html#start_6 when you invoke LAMMPS, or you can
|
||||
use the "suffix"_suffix.html command in your input script.
|
||||
|
||||
See "Section 5"_Section_accelerate.html of the manual for
|
||||
more instructions on how to use the accelerated styles effectively.
|
||||
|
||||
:line
|
||||
|
||||
[Restrictions:]
|
||||
|
||||
This bond style can only be used if LAMMPS was built with the
|
||||
MOLECULE package. See the "Making
|
||||
LAMMPS"_Section_start.html#start_3 section for more info on packages.
|
||||
|
||||
[Related commands:]
|
||||
|
||||
"bond_coeff"_bond_coeff.html, "delete_bonds"_delete_bonds.html
|
||||
|
||||
[Default:] none
|
||||
@ -8,6 +8,7 @@ Bond Styles :h1
|
||||
bond_class2
|
||||
bond_fene
|
||||
bond_fene_expand
|
||||
bond_gromos
|
||||
bond_harmonic
|
||||
bond_harmonic_shift
|
||||
bond_harmonic_shift_cut
|
||||
|
||||
@ -32,6 +32,7 @@ Commands :h1
|
||||
dimension
|
||||
displace_atoms
|
||||
dump
|
||||
dump_cfg_uef
|
||||
dump_h5md
|
||||
dump_image
|
||||
dump_modify
|
||||
|
||||
@ -28,7 +28,7 @@ compute 1 all aggregate/atom 3.5 :pre
|
||||
|
||||
[Description:]
|
||||
|
||||
Define a computation that assigns each atom a cluster, fragement,
|
||||
Define a computation that assigns each atom a cluster, fragment,
|
||||
or aggregate ID.
|
||||
|
||||
A cluster is defined as a set of atoms, each of which is within the
|
||||
@ -53,7 +53,7 @@ like micelles.
|
||||
Only atoms in the compute group are clustered and assigned cluster
|
||||
IDs. Atoms not in the compute group are assigned a cluster ID = 0.
|
||||
For fragments, only bonds where [both] atoms of the bond are included
|
||||
in the compute group are assigned to fragments, so that only fragmets
|
||||
in the compute group are assigned to fragments, so that only fragments
|
||||
are detected where [all] atoms are in the compute group. Thus atoms
|
||||
may be included in the compute group, yes still have a fragment ID of 0.
|
||||
|
||||
|
||||
@ -27,8 +27,8 @@ compute 1 all dihedral/local phi :pre
|
||||
|
||||
Define a computation that calculates properties of individual dihedral
|
||||
interactions. The number of datums generated, aggregated across all
|
||||
processors, equals the number of angles in the system, modified by the
|
||||
group parameter as explained below.
|
||||
processors, equals the number of dihedral angles in the system, modified
|
||||
by the group parameter as explained below.
|
||||
|
||||
The value {phi} is the dihedral angle, as defined in the diagram on
|
||||
the "dihedral_style"_dihedral_style.html doc page.
|
||||
|
||||
61
doc/src/compute_pressure_uef.txt
Normal file
@ -0,0 +1,61 @@
|
||||
"LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c
|
||||
|
||||
:link(lws,http://lammps.sandia.gov)
|
||||
:link(ld,Manual.html)
|
||||
:link(lc,Section_commands.html#comm)
|
||||
|
||||
:line
|
||||
|
||||
compute pressure/uef command :h3
|
||||
|
||||
[Syntax:]
|
||||
|
||||
compute ID group-ID pressure/uef temp-ID keyword ... :pre
|
||||
|
||||
ID, group-ID are documented in "compute"_compute.html command
|
||||
pressure/uef = style name of this compute command
|
||||
temp-ID = ID of compute that calculates temperature, can be NULL if not needed
|
||||
zero or more keywords may be appended
|
||||
keyword = {ke} or {pair} or {bond} or {angle} or {dihedral} or {improper} or {kspace} or {fix} or {virial} :ul
|
||||
|
||||
[Examples:]
|
||||
|
||||
compute 1 all pressure/uef my_temp_uef
|
||||
compute 2 all pressure/uef my_temp_uef virial :pre
|
||||
|
||||
[Description:]
|
||||
|
||||
This command is used to compute the pressure tensor in
|
||||
the reference frame of the applied flow field when
|
||||
"fix nvt/uef"_fix_nh_uef.html" or
|
||||
"fix npt/uef"_fix_nh_uef.html" is used.
|
||||
It is not necessary to use this command to compute the scalar
|
||||
value of the pressure. A "compute pressure"_compute_pressure.html
|
||||
may be used for that purpose.
|
||||
|
||||
The keywords and output information are documented in
|
||||
"compute_pressure"_compute_pressure.html.
|
||||
|
||||
[Restrictions:]
|
||||
|
||||
This fix is part of the USER-UEF package. It is only enabled if
|
||||
LAMMPS was built with that package. See the
|
||||
"Making LAMMPS"_Section_start.html#start_3 section for more info.
|
||||
|
||||
This command can only be used when "fix nvt/uef"_fix_nh_uef.html
|
||||
or "fix npt/uef"_fix_nh_uef.html is active.
|
||||
|
||||
The kinetic contribution to the pressure tensor
|
||||
will be accurate only when
|
||||
the compute specified by {temp-ID} is a
|
||||
"compute temp/uef"_compute_temp_uef.html.
|
||||
|
||||
[Related commands:]
|
||||
|
||||
"compute pressure"_compute_pressure.html,
|
||||
"fix nvt/uef"_fix_nh_uef.html,
|
||||
"compute temp/uef"_compute_temp_uef.html
|
||||
|
||||
[Default:] none
|
||||
|
||||
|
||||
52
doc/src/compute_temp_uef.txt
Normal file
@ -0,0 +1,52 @@
|
||||
"LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c
|
||||
|
||||
:link(lws,http://lammps.sandia.gov)
|
||||
:link(ld,Manual.html)
|
||||
:link(lc,Section_commands.html#comm)
|
||||
|
||||
:line
|
||||
|
||||
compute temp/uef command :h3
|
||||
|
||||
[Syntax:]
|
||||
|
||||
compute ID group-ID temp/uef :pre
|
||||
|
||||
ID, group-ID are documented in "compute"_compute.html command
|
||||
temp/uef = style name of this compute command :ul
|
||||
|
||||
[Examples:]
|
||||
|
||||
compute 1 all temp/uef
|
||||
compute 2 sel temp/uef :pre
|
||||
|
||||
[Description:]
|
||||
|
||||
This command is used to compute the kinetic energy tensor in
|
||||
the reference frame of the applied flow field when
|
||||
"fix nvt/uef"_fix_nh_uef.html" or
|
||||
"fix npt/uef"_fix_nh_uef.html" is used.
|
||||
It is not necessary to use this command to compute the scalar
|
||||
value of the temperature. A "compute temp"_compute_temp.html
|
||||
may be used for that purpose.
|
||||
|
||||
Output information for this command can be found in the
|
||||
documentation for "compute temp"_compute_temp.html.
|
||||
|
||||
[Restrictions:]
|
||||
|
||||
This fix is part of the USER-UEF package. It is only enabled if
|
||||
LAMMPS was built with that package. See the
|
||||
"Making LAMMPS"_Section_start.html#start_3 section for more info.
|
||||
|
||||
This command can only be used when "fix nvt/uef"_fix_nh_uef.html
|
||||
or "fix npt/uef"_fix_nh_uef.html is active.
|
||||
|
||||
[Related commands:]
|
||||
|
||||
"compute temp"_compute_temp.html,
|
||||
"fix nvt/uef"_fix_nh_uef.html,
|
||||
"compute pressure/uef"_compute_pressure_uef.html
|
||||
|
||||
|
||||
[Default:] none
|
||||
@ -65,6 +65,7 @@ Computes :h1
|
||||
compute_pe_atom
|
||||
compute_plasticity_atom
|
||||
compute_pressure
|
||||
compute_pressure_uef
|
||||
compute_property_atom
|
||||
compute_property_chunk
|
||||
compute_property_local
|
||||
@ -114,6 +115,7 @@ Computes :h1
|
||||
compute_temp_region_eff
|
||||
compute_temp_rotate
|
||||
compute_temp_sphere
|
||||
compute_temp_uef
|
||||
compute_ti
|
||||
compute_torque_chunk
|
||||
compute_vacf
|
||||
|
||||
@ -36,9 +36,9 @@ keyword = {mol} or {basis} or {remap} or {var} or {set} or {units} :l
|
||||
{set} values = dim name
|
||||
dim = {x} or {y} or {z}
|
||||
name = name of variable to set with x, y, or z atom position
|
||||
{rotate} values = Rx Ry Rz theta
|
||||
Rx,Ry,Rz = rotation vector for single molecule
|
||||
{rotate} values = theta Rx Ry Rz
|
||||
theta = rotation angle for single molecule (degrees)
|
||||
Rx,Ry,Rz = rotation vector for single molecule
|
||||
{units} value = {lattice} or {box}
|
||||
{lattice} = the geometry is defined in lattice units
|
||||
{box} = the geometry is defined in simulation box units :pre
|
||||
@ -227,28 +227,30 @@ the sinusoid would appear to be "smoother". Also note the use of the
|
||||
converts lattice spacings to distance. Click on the image for a
|
||||
larger version.
|
||||
|
||||
dimension 2
|
||||
variable x equal 100
|
||||
variable y equal 25
|
||||
lattice hex 0.8442
|
||||
region box block 0 $x 0 $y -0.5 0.5
|
||||
create_box 1 box :pre
|
||||
|
||||
variable xx equal 0.0
|
||||
variable yy equal 0.0
|
||||
variable xx internal 0.0
|
||||
variable yy internal 0.0
|
||||
variable v equal "(0.2*v_y*ylat * cos(v_xx/xlat * 2.0*PI*4.0/v_x) + 0.5*v_y*ylat - v_yy) > 0.0"
|
||||
create_atoms 1 box var v set x xx set y yy :pre
|
||||
create_atoms 1 box var v set x xx set y yy
|
||||
write_dump all atom sinusoid.lammpstrj :pre
|
||||
|
||||
:c,image(JPG/sinusoid_small.jpg,JPG/sinusoid.jpg)
|
||||
|
||||
The {rotate} keyword can be used with the {single} style, when adding
|
||||
a single molecule to specify the orientation at which the molecule is
|
||||
inserted. The axis of rotation is determined by the rotation vector
|
||||
(Rx,Ry,Rz) that goes through the insertion point. The specified
|
||||
{theta} determines the angle of rotation around that axis. Note that
|
||||
the direction of rotation for the atoms around the rotation axis is
|
||||
consistent with the right-hand rule: if your right-hand's thumb points
|
||||
along {R}, then your fingers wrap around the axis in the direction of
|
||||
rotation.
|
||||
The {rotate} keyword can only be used with the {single} style and
|
||||
when adding a single molecule. It allows to specify the orientation
|
||||
at which the molecule is inserted. The axis of rotation is
|
||||
determined by the rotation vector (Rx,Ry,Rz) that goes through the
|
||||
insertion point. The specified {theta} determines the angle of
|
||||
rotation around that axis. Note that the direction of rotation for
|
||||
the atoms around the rotation axis is consistent with the right-hand
|
||||
rule: if your right-hand's thumb points along {R}, then your fingers
|
||||
wrap around the axis in the direction of rotation.
|
||||
|
||||
The {units} keyword determines the meaning of the distance units used
|
||||
to specify the coordinates of the one particle created by the {single}
|
||||
|
||||
@ -18,7 +18,7 @@ style = {many} or {single/bond} or {single/angle} or {single/dihedral} :ule,l
|
||||
group2-ID = ID of second group, bonds will be between atoms in the 2 groups
|
||||
btype = bond type of created bonds
|
||||
rmin = minimum distance between pair of atoms to bond together
|
||||
rmax = minimum distance between pair of atoms to bond together
|
||||
rmax = maximum distance between pair of atoms to bond together
|
||||
{single/bond} args = btype batom1 batom2
|
||||
btype = bond type of new bond
|
||||
batom1,batom2 = atom IDs for two atoms in bond
|
||||
|
||||
@ -7,6 +7,7 @@
|
||||
:line
|
||||
|
||||
dihedral_style fourier command :h3
|
||||
dihedral_style fourier/intel command :h3
|
||||
dihedral_style fourier/omp command :h3
|
||||
|
||||
[Syntax:]
|
||||
|
||||
@ -45,7 +45,7 @@ args = list of arguments for a particular style :l
|
||||
{xyz/gz} args = none
|
||||
{xyz/mpiio} args = none :pre
|
||||
|
||||
{custom} or {custom/gz} or {custom/mpiio} args = list of atom attributes :l
|
||||
{custom} or {custom/gz} or {custom/mpiio} or {netcdf} or {netcdf/mpiio} args = list of atom attributes :l
|
||||
possible attributes = id, mol, proc, procp1, type, element, mass,
|
||||
x, y, z, xs, ys, zs, xu, yu, zu,
|
||||
xsu, ysu, zsu, ix, iy, iz,
|
||||
@ -649,20 +649,7 @@ LAMMPS"_Section_start.html#start_3 section for more info.
|
||||
|
||||
The {xtc} style is part of the MISC package. It is only enabled if
|
||||
LAMMPS was built with that package. See the "Making
|
||||
LAMMPS"_Section_start.html#start_3 section for more info. This is
|
||||
because some machines may not support the low-level XDR data format
|
||||
that XTC files are written with, which will result in a compile-time
|
||||
error when a low-level include file is not found. Putting this style
|
||||
in a package makes it easy to exclude from a LAMMPS build for those
|
||||
machines. However, the MISC package also includes two compatibility
|
||||
header files and associated functions, which should be a suitable
|
||||
substitute on machines that do not have the appropriate native header
|
||||
files. This option can be invoked at build time by adding
|
||||
-DLAMMPS_XDR to the CCFLAGS variable in the appropriate low-level
|
||||
Makefile, e.g. src/MAKE/Makefile.foo. This compatibility mode has
|
||||
been tested successfully on Cray XT3/XT4/XT5 and IBM BlueGene/L
|
||||
machines and should also work on IBM BG/P, and Windows XP/Vista/7
|
||||
machines.
|
||||
LAMMPS"_Section_start.html#start_3 section for more info.
|
||||
|
||||
[Related commands:]
|
||||
|
||||
|
||||
53
doc/src/dump_cfg_uef.txt
Normal file
@ -0,0 +1,53 @@
|
||||
"LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c
|
||||
|
||||
:link(lws,http://lammps.sandia.gov)
|
||||
:link(ld,Manual.html)
|
||||
:link(lc,Section_commands.html#comm)
|
||||
|
||||
:line
|
||||
|
||||
dump cfg/uef command :h3
|
||||
|
||||
[Syntax:]
|
||||
|
||||
dump ID group-ID cfg/uef N file mass type xs ys zs args :pre
|
||||
|
||||
ID = user-assigned name for the dump :ulb,l
|
||||
group-ID = ID of the group of atoms to be dumped :l
|
||||
N = dump every this many timesteps :l
|
||||
file = name of file to write dump info to :l
|
||||
args = same as args for "dump custom"_dump.html :pre
|
||||
|
||||
:ule
|
||||
|
||||
[Examples:]
|
||||
|
||||
dump 1 all cfg/uef 10 dump.*.cfg mass type xs ys zs
|
||||
dump 2 all cfg/uef 100 dump.*.cfg mass type xs ys zs id c_stress :pre
|
||||
|
||||
[Description:]
|
||||
|
||||
This command is used to dump atomic coordinates in the
|
||||
reference frame of the applied flow field when
|
||||
"fix nvt/uef"_fix_nh_uef.html or
|
||||
"fix npt/uef"_fix_nh_uef.html or is used. Only the atomic
|
||||
coordinates and frame-invariant scalar quantities
|
||||
will be in the flow frame. If velocities are selected
|
||||
as output, for example, they will not be in the same
|
||||
reference frame as the atomic positions.
|
||||
|
||||
[Restrictions:]
|
||||
|
||||
This fix is part of the USER-UEF package. It is only enabled if
|
||||
LAMMPS was built with that package. See the
|
||||
"Making LAMMPS"_Section_start.html#start_3 section for more info.
|
||||
|
||||
This command can only be used when "fix nvt/uef"_fix_nh_uef.html
|
||||
or "fix npt/uef"_fix_nh_uef.html is active.
|
||||
|
||||
[Related commands:]
|
||||
|
||||
"dump"_dump.html,
|
||||
"fix nvt/uef"_fix_nh_uef.html
|
||||
|
||||
[Default:] none
|
||||
@ -15,8 +15,9 @@ dump_modify dump-ID keyword values ... :pre
|
||||
dump-ID = ID of dump to modify :ulb,l
|
||||
one or more keyword/value pairs may be appended :l
|
||||
these keywords apply to various dump styles :l
|
||||
keyword = {append} or {buffer} or {element} or {every} or {fileper} or {first} or {flush} or {format} or {image} or {label} or {nfile} or {pad} or {precision} or {region} or {scale} or {sort} or {thresh} or {unwrap} :l
|
||||
{append} arg = {yes} or {no} or {at} N
|
||||
keyword = {append} or {at} or {buffer} or {element} or {every} or {fileper} or {first} or {flush} or {format} or {image} or {label} or {nfile} or {pad} or {precision} or {region} or {scale} or {sort} or {thresh} or {unwrap} :l
|
||||
{append} arg = {yes} or {no}
|
||||
{at} arg = N
|
||||
N = index of frame written upon first dump
|
||||
{buffer} arg = {yes} or {no}
|
||||
{element} args = E1 E2 ... EN, where N = # of atom types
|
||||
@ -141,13 +142,18 @@ and {dcd}. It also applies only to text output files, not to binary
|
||||
or gzipped or image/movie files. If specified as {yes}, then dump
|
||||
snapshots are appended to the end of an existing dump file. If
|
||||
specified as {no}, then a new dump file will be created which will
|
||||
overwrite an existing file with the same name. If the {at} option is present
|
||||
({netcdf} only), then the frame to append to can be specified. Negative values
|
||||
are counted from the end of the file. This keyword can only take effect if the
|
||||
dump_modify command is used after the "dump"_dump.html command, but before the
|
||||
first command that causes dump snapshots to be output, e.g. a "run"_run.html or
|
||||
"minimize"_minimize.html command. Once the dump file has been opened, this
|
||||
keyword has no further effect.
|
||||
overwrite an existing file with the same name.
|
||||
|
||||
:line
|
||||
|
||||
The {at} keyword only applies to the {netcdf} dump style. It can only
|
||||
be used if the {append yes} keyword is also used. The {N} argument is
|
||||
the index of which frame to append to. A negative value can be
|
||||
specified for {N}, which means a frame counted from the end of the
|
||||
file. The {at} keyword can only be used if the dump_modify command is
|
||||
before the first command that causes dump snapshots to be output,
|
||||
e.g. a "run"_run.html or "minimize"_minimize.html command. Once the
|
||||
dump file has been opened, this keyword has no further effect.
|
||||
|
||||
:line
|
||||
|
||||
|
||||
@ -25,7 +25,8 @@ args = list of atom attributes, same as for "dump_style custom"_dump.html :l,ule
|
||||
|
||||
dump 1 all netcdf 100 traj.nc type x y z vx vy vz
|
||||
dump_modify 1 append yes at -1 thermo yes
|
||||
dump 1 all netcdf/mpiio 1000 traj.nc id type x y z :pre
|
||||
dump 1 all netcdf/mpiio 1000 traj.nc id type x y z
|
||||
dump 1 all netcdf 1000 traj.*.nc id type x y z :pre
|
||||
|
||||
[Description:]
|
||||
|
||||
@ -73,4 +74,3 @@ section for more info.
|
||||
[Related commands:]
|
||||
|
||||
"dump"_dump.html, "dump_modify"_dump_modify.html, "undump"_undump.html
|
||||
|
||||
|
||||
@ -120,6 +120,10 @@ quantity being minimized), you MUST enable the
|
||||
|
||||
[Restrictions:]
|
||||
|
||||
To function as expected this fix command must be issued {before} a
|
||||
"read_data"_read_data.html command but {after} a
|
||||
"read_restart"_read_restart.html command.
|
||||
|
||||
This fix can only be used if LAMMPS was built with the MOLECULE
|
||||
package. See the "Making
|
||||
LAMMPS"_Section_start.html#start_3 section for more info on packages.
|
||||
|
||||
@ -86,11 +86,16 @@ Change the volume and/or shape of the simulation box during a dynamics
|
||||
run. Orthogonal simulation boxes have 3 adjustable parameters
|
||||
(x,y,z). Triclinic (non-orthogonal) simulation boxes have 6
|
||||
adjustable parameters (x,y,z,xy,xz,yz). Any or all of them can be
|
||||
adjusted independently and simultaneously by this command. This fix
|
||||
can be used to perform non-equilibrium MD (NEMD) simulations of a
|
||||
continuously strained system. See the "fix
|
||||
adjusted independently and simultaneously by this command.
|
||||
|
||||
This fix can be used to perform non-equilibrium MD (NEMD) simulations
|
||||
of a continuously strained system. See the "fix
|
||||
nvt/sllod"_fix_nvt_sllod.html and "compute
|
||||
temp/deform"_compute_temp_deform.html commands for more details.
|
||||
temp/deform"_compute_temp_deform.html commands for more details. Note
|
||||
that simulation of a continuously extended system (extensional flow)
|
||||
can be modeled using the "USER-UEF
|
||||
package"_Section_packages.html#USER-UEF and its "fix
|
||||
commands"_fix_nh_uef.html.
|
||||
|
||||
For the {x}, {y}, {z} parameters, the associated dimension cannot be
|
||||
shrink-wrapped. For the {xy}, {yz}, {xz} parameters, the associated
|
||||
|
||||
@ -26,16 +26,20 @@ zero or more keyword/value pairs may be appended to args :l
|
||||
keyword = {mol}, {region}, {maxangle}, {pressure}, {fugacity_coeff}, {full_energy}, {charge}, {group}, {grouptype}, {intra_energy}, {tfac_insert}, or {overlap_cutoff}
|
||||
{mol} value = template-ID
|
||||
template-ID = ID of molecule template specified in a separate "molecule"_molecule.html command
|
||||
{mcmoves} values = Patomtrans Pmoltrans Pmolrotate
|
||||
Patomtrans = proportion of atom translation MC moves
|
||||
Pmoltrans = proportion of molecule translation MC moves
|
||||
Pmolrotate = proportion of molecule rotation MC moves
|
||||
{rigid} value = fix-ID
|
||||
fix-ID = ID of "fix rigid/small"_fix_rigid.html command
|
||||
{shake} value = fix-ID
|
||||
fix-ID = ID of "fix shake"_fix_shake.html command
|
||||
{region} value = region-ID
|
||||
region-ID = ID of region where MC moves are allowed
|
||||
region-ID = ID of region where GCMC exchanges and MC moves are allowed
|
||||
{maxangle} value = maximum molecular rotation angle (degrees)
|
||||
{pressure} value = pressure of the gas reservoir (pressure units)
|
||||
{fugacity_coeff} value = fugacity coefficient of the gas reservoir (unitless)
|
||||
{full_energy} = compute the entire system energy when performing MC moves
|
||||
{full_energy} = compute the entire system energy when performing GCMC exchanges and MC moves
|
||||
{charge} value = charge of inserted atoms (charge units)
|
||||
{group} value = group-ID
|
||||
group-ID = group-ID for inserted atoms (string)
|
||||
@ -56,34 +60,42 @@ fix 4 my_gas gcmc 1 10 10 1 123456543 300.0 -12.5 1.0 region disk :pre
|
||||
[Description:]
|
||||
|
||||
This fix performs grand canonical Monte Carlo (GCMC) exchanges of
|
||||
atoms or molecules of the given type with an imaginary ideal gas
|
||||
atoms or molecules with an imaginary ideal gas
|
||||
reservoir at the specified T and chemical potential (mu) as discussed
|
||||
in "(Frenkel)"_#Frenkel. If used with the "fix nvt"_fix_nh.html
|
||||
in "(Frenkel)"_#Frenkel. It also
|
||||
attempts Monte Carlo (MC) moves (translations and molecule
|
||||
rotations) within the simulation cell or
|
||||
region. If used with the "fix nvt"_fix_nh.html
|
||||
command, simulations in the grand canonical ensemble (muVT, constant
|
||||
chemical potential, constant volume, and constant temperature) can be
|
||||
performed. Specific uses include computing isotherms in microporous
|
||||
materials, or computing vapor-liquid coexistence curves.
|
||||
|
||||
Every N timesteps the fix attempts a number of GCMC exchanges
|
||||
(insertions or deletions) of gas atoms or molecules of the given type
|
||||
between the simulation cell and the imaginary reservoir. It also
|
||||
attempts a number of Monte Carlo moves (translations and molecule
|
||||
rotations) of gas of the given type within the simulation cell or
|
||||
region. The average number of attempted GCMC exchanges is X. The
|
||||
average number of attempted MC moves is M. M should typically be
|
||||
Every N timesteps the fix attempts both GCMC exchanges
|
||||
(insertions or deletions) and MC moves of gas atoms or molecules.
|
||||
On those timesteps, the average number of attempted GCMC exchanges is X,
|
||||
while the average number of attempted MC moves is M.
|
||||
For GCMC exchanges of either molecular or atomic gasses,
|
||||
these exchanges can be either deletions or insertions,
|
||||
with equal probability.
|
||||
|
||||
The possible choices for MC moves are translation of an atom,
|
||||
translation of a molecule, and rotation of a molecule.
|
||||
The relative amounts of each are determined by the optional
|
||||
{mcmoves} keyword (see below).
|
||||
The default behavior is as follows.
|
||||
If the {mol} keyword is used, only molecule translations
|
||||
and molecule rotations are performed with equal probability.
|
||||
Conversely, if the {mol} keyword is not used, only atom
|
||||
translations are performed.
|
||||
M should typically be
|
||||
chosen to be approximately equal to the expected number of gas atoms
|
||||
or molecules of the given type within the simulation cell or region,
|
||||
which will result in roughly one MC translation per atom or molecule
|
||||
which will result in roughly one MC move per atom or molecule
|
||||
per MC cycle.
|
||||
|
||||
For MC moves of molecular gasses, rotations and translations are each
|
||||
attempted with 50% probability. For MC moves of atomic gasses,
|
||||
translations are attempted 100% of the time. For MC exchanges of
|
||||
either molecular or atomic gasses, deletions and insertions are each
|
||||
attempted with 50% probability.
|
||||
|
||||
All inserted particles are always assigned to two groups: the default
|
||||
group "all" and the group specified in the fix gcmc command (which can
|
||||
All inserted particles are always added to two groups: the default
|
||||
group "all" and the fix group specified in the fix command (which can
|
||||
also be "all"). In addition, particles are also added to any groups
|
||||
specified by the {group} and {grouptype} keywords. If inserted
|
||||
particles are individual atoms, they are assigned the atom type given
|
||||
@ -92,9 +104,9 @@ effect and must be set to zero. Instead, the type of each atom in the
|
||||
inserted molecule is specified in the file read by the
|
||||
"molecule"_molecule.html command.
|
||||
|
||||
This fix cannot be used to perform MC insertions of gas atoms or
|
||||
molecules other than the exchanged type, but MC deletions,
|
||||
translations, and rotations can be performed on any atom/molecule in
|
||||
This fix cannot be used to perform GCMC insertions of gas atoms or
|
||||
molecules other than the exchanged type, but GCMC deletions,
|
||||
and MC translations, and rotations can be performed on any atom/molecule in
|
||||
the fix group. All atoms in the simulation cell can be moved using
|
||||
regular time integration translations, e.g. via "fix nvt"_fix_nh.html,
|
||||
resulting in a hybrid GCMC+MD simulation. A smaller-than-usual
|
||||
@ -150,8 +162,8 @@ about this point.
|
||||
Individual atoms are inserted, unless the {mol} keyword is used. It
|
||||
specifies a {template-ID} previously defined using the
|
||||
"molecule"_molecule.html command, which reads a file that defines the
|
||||
molecule. The coordinates, atom types, charges, etc, as well as any
|
||||
bond/angle/etc and special neighbor information for the molecule can
|
||||
molecule. The coordinates, atom types, charges, etc., as well as any
|
||||
bonding and special neighbor information for the molecule can
|
||||
be specified in the molecule file. See the "molecule"_molecule.html
|
||||
command for details. The only settings required to be in this file
|
||||
are the coordinates and types of atoms in the molecule.
|
||||
@ -162,7 +174,7 @@ error when it tries to find bonded neighbors. LAMMPS will warn you if
|
||||
any of the atoms eligible for deletion have a non-zero molecule ID,
|
||||
but does not check for this at the time of deletion.
|
||||
|
||||
If you wish to insert molecules via the {mol} keyword, that will be
|
||||
If you wish to insert molecules using the {mol} keyword that will be
|
||||
treated as rigid bodies, use the {rigid} keyword, specifying as its
|
||||
value the ID of a separate "fix rigid/small"_fix_rigid.html command
|
||||
which also appears in your input script.
|
||||
@ -178,6 +190,15 @@ their bonds or angles constrained via SHAKE, use the {shake} keyword,
|
||||
specifying as its value the ID of a separate "fix
|
||||
shake"_fix_shake.html command which also appears in your input script.
|
||||
|
||||
Optionally, users may specify the relative amounts of different MC
|
||||
moves using the {mcmoves} keyword. The values {Patomtrans},
|
||||
{Pmoltrans}, {Pmolrotate} specify the average proportion of
|
||||
atom translations, molecule translations, and molecule rotations,
|
||||
respectively. The values must be non-negative integers or real
|
||||
numbers, with at least one non-zero value. For example, (10,30,0)
|
||||
would result in 25% of the MC moves being atomic translations, 75%
|
||||
molecular translations, and no molecular rotations.
|
||||
|
||||
Optionally, users may specify the maximum rotation angle for molecular
|
||||
rotations using the {maxangle} keyword and specifying the angle in
|
||||
degrees. Rotations are performed by generating a random point on the
|
||||
@ -188,19 +209,19 @@ to the unit vector defined by the point on the unit sphere. The same
|
||||
procedure is used for randomly rotating molecules when they are
|
||||
inserted, except that the maximum angle is 360 degrees.
|
||||
|
||||
Note that fix GCMC does not use configurational bias MC or any other
|
||||
Note that fix gcmc does not use configurational bias MC or any other
|
||||
kind of sampling of intramolecular degrees of freedom. Inserted
|
||||
molecules can have different orientations, but they will all have the
|
||||
same intramolecular configuration, which was specified in the molecule
|
||||
command input.
|
||||
|
||||
For atomic gasses, inserted atoms have the specified atom type, but
|
||||
deleted atoms are any atoms that have been inserted or that belong to
|
||||
the user-specified fix group. For molecular gasses, exchanged
|
||||
deleted atoms are any atoms that have been inserted or that already
|
||||
belong to the fix group. For molecular gasses, exchanged
|
||||
molecules use the same atom types as in the template molecule supplied
|
||||
by the user. In both cases, exchanged atoms/molecules are assigned to
|
||||
two groups: the default group "all" and the group specified in the fix
|
||||
gcmc command (which can also be "all").
|
||||
two groups: the default group "all" and the fix group
|
||||
(which can also be "all").
|
||||
|
||||
The chemical potential is a user-specified input parameter defined
|
||||
as:
|
||||
@ -241,13 +262,16 @@ which case the user-specified chemical potential is ignored. The user
|
||||
may also specify the fugacity coefficient phi using the
|
||||
{fugacity_coeff} keyword, which defaults to unity.
|
||||
|
||||
The {full_energy} option means that fix GCMC will compute the total
|
||||
potential energy of the entire simulated system. The total system
|
||||
energy before and after the proposed GCMC move is then used in the
|
||||
The {full_energy} option means that the fix calculates the total
|
||||
potential energy of the entire simulated system, instead of just
|
||||
the energy of the part that is changed. The total system
|
||||
energy before and after the proposed GCMC exchange or MC move
|
||||
is then used in the
|
||||
Metropolis criterion to determine whether or not to accept the
|
||||
proposed GCMC move. By default, this option is off, in which case only
|
||||
partial energies are computed to determine the difference in energy
|
||||
that would be caused by the proposed GCMC move.
|
||||
proposed change. By default, this option is off,
|
||||
in which case only
|
||||
partial energies are computed to determine the energy difference
|
||||
due to the proposed change.
|
||||
|
||||
The {full_energy} option is needed for systems with complicated
|
||||
potential energy calculations, including the following:
|
||||
@ -263,10 +287,11 @@ In these cases, LAMMPS will automatically apply the {full_energy}
|
||||
keyword and issue a warning message.
|
||||
|
||||
When the {mol} keyword is used, the {full_energy} option also includes
|
||||
the intramolecular energy of inserted and deleted molecules. If this
|
||||
the intramolecular energy of inserted and deleted molecules, whereas
|
||||
this energy is not included when {full_energy} is not used. If this
|
||||
is not desired, the {intra_energy} keyword can be used to define an
|
||||
amount of energy that is subtracted from the final energy when a
|
||||
molecule is inserted, and added to the initial energy when a molecule
|
||||
molecule is inserted, and subtracted from the initial energy when a molecule
|
||||
is deleted. For molecules that have a non-zero intramolecular energy,
|
||||
this will ensure roughly the same behavior whether or not the
|
||||
{full_energy} option is used.
|
||||
@ -291,7 +316,8 @@ include: "efield"_fix_efield.html, "gravity"_fix_gravity.html,
|
||||
"temp/berendsen"_fix_temp_berendsen.html,
|
||||
"temp/rescale"_fix_temp_rescale.html, and "wall fixes"_fix_wall.html.
|
||||
For that energy to be included in the total potential energy of the
|
||||
system (the quantity used when performing GCMC moves), you MUST enable
|
||||
system (the quantity used when performing GCMC exchange and MC moves),
|
||||
you MUST enable
|
||||
the "fix_modify"_fix_modify.html {energy} option for that fix. The
|
||||
doc pages for individual "fix"_fix.html commands specify if this
|
||||
should be done.
|
||||
@ -305,9 +331,14 @@ about simulating non-neutral systems with kspace on.
|
||||
|
||||
Use of this fix typically will cause the number of atoms to fluctuate,
|
||||
therefore, you will want to use the
|
||||
"compute_modify"_compute_modify.html command to insure that the
|
||||
"compute_modify dynamic/dof"_compute_modify.html command to insure that the
|
||||
current number of atoms is used as a normalizing factor each time
|
||||
temperature is computed. Here is the necessary command:
|
||||
temperature is computed. A simple example of this is:
|
||||
|
||||
compute_modify thermo_temp dynamic yes :pre
|
||||
|
||||
A more complicated example is listed earlier on this page
|
||||
in the context of NVT dynamics.
|
||||
|
||||
NOTE: If the density of the cell is initially very small or zero, and
|
||||
increases to a much larger density after a period of equilibration,
|
||||
@ -327,17 +358,9 @@ assigning an infinite positive energy to all new configurations that
|
||||
place any pair of atoms closer than the specified overlap cutoff
|
||||
distance.
|
||||
|
||||
compute_modify thermo_temp dynamic yes :pre
|
||||
|
||||
If LJ units are used, note that a value of 0.18292026 is used by this
|
||||
fix as the reduced value for Planck's constant. This value was
|
||||
derived from LJ parameters for argon, where h* = h/sqrt(sigma^2 *
|
||||
epsilon * mass), sigma = 3.429 angstroms, epsilon/k = 121.85 K, and
|
||||
mass = 39.948 amu.
|
||||
|
||||
The {group} keyword assigns all inserted atoms to the
|
||||
The {group} keyword adds all inserted atoms to the
|
||||
"group"_group.html of the group-ID value. The {grouptype} keyword
|
||||
assigns all inserted atoms of the specified type to the
|
||||
adds all inserted atoms of the specified type to the
|
||||
"group"_group.html of the group-ID value.
|
||||
|
||||
[Restart, fix_modify, output, run start/stop, minimize info:]
|
||||
@ -384,7 +407,8 @@ Can be run in parallel, but aspects of the GCMC part will not scale
|
||||
well in parallel. Only usable for 3D simulations.
|
||||
|
||||
When using fix gcmc in combination with fix shake or fix rigid,
|
||||
only gcmc exchange moves are supported.
|
||||
only GCMC exchange moves are supported, so the argument
|
||||
{M} must be zero.
|
||||
|
||||
Note that very lengthy simulations involving insertions/deletions of
|
||||
billions of gas molecules may run out of atom or molecule IDs and
|
||||
@ -409,7 +433,9 @@ the user for each subsequent fix gcmc command.
|
||||
[Default:]
|
||||
|
||||
The option defaults are mol = no, maxangle = 10, overlap_cutoff = 0.0,
|
||||
fugacity_coeff = 1, and full_energy = no,
|
||||
fugacity_coeff = 1.0, intra_energy = 0.0, tfac_insert = 1.0.
|
||||
(Patomtrans, Pmoltrans, Pmolrotate) = (1, 0, 0) for mol = no and
|
||||
(0, 1, 1) for mol = yes. full_energy = no,
|
||||
except for the situations where full_energy is required, as
|
||||
listed above.
|
||||
|
||||
|
||||
@ -64,10 +64,10 @@ not performed once every {N} steps by this command. Instead it is
|
||||
performed (typically) only a small number of times and the elapsed
|
||||
times are used to predict when the end-of-the-run will be. Both of
|
||||
these attributes can be useful when performing benchmark calculations
|
||||
for a desired length of time with minmimal overhead. For example, if
|
||||
for a desired length of time with minimal overhead. For example, if
|
||||
a run is performing 1000s of timesteps/sec, the overhead for syncing
|
||||
the timer frequently across a large number of processors may be
|
||||
non-negligble.
|
||||
non-negligible.
|
||||
|
||||
Equal-style variables evaluate to a numeric value. See the
|
||||
"variable"_variable.html command for a description. They calculate
|
||||
@ -125,7 +125,7 @@ to the screen and logfile when the halt condition is triggered. If
|
||||
{message} is set to yes, a one line message with the values that
|
||||
triggered the halt is printed. If {message} is set to no, no message
|
||||
is printed; the run simply exits. The latter may be desirable for
|
||||
post-processing tools that extract thermodyanmic information from log
|
||||
post-processing tools that extract thermodynamic information from log
|
||||
files.
|
||||
|
||||
[Restart, fix_modify, output, run start/stop, minimize info:]
|
||||
|
||||
@ -66,7 +66,7 @@ reference charge of overlapping atom-centered densities and bond
|
||||
integrals are parameterized using a Slater-Koster tight-binding
|
||||
approach. This procedure, which usually is referred to as the DFTB
|
||||
method has been described in detail by ("Elstner"_#Elstner) and
|
||||
("Finnis"_#Finnis) and coworkers.
|
||||
("Finnis"_#Finnis2) and coworkers.
|
||||
|
||||
The work of the LATTE developers follows that of Elstner closely with
|
||||
respect to the physical model. However, the development of LATTE is
|
||||
@ -173,7 +173,7 @@ M. Haugk, T. Frauenheim, S. Suhai, and G. Seifert, Phys. Rev. B, 58,
|
||||
M. Haugk, T. Frauenheim, S. Suhai, and G. Seifert, Phys. Rev. B, 58,
|
||||
7260 (1998).
|
||||
|
||||
:link(Finnis)
|
||||
:link(Finnis2)
|
||||
[(Finnis)] M. W. Finnis, A. T. Paxton, M. Methfessel, and M. van
|
||||
Schilfgarde, Phys. Rev. Lett., 81, 5149 (1998).
|
||||
|
||||
@ -197,11 +197,11 @@ J. Sci. Comput. 36 (2), 147-170, (2014).
|
||||
[(Niklasson2014)] A. M. N. Niklasson and M. Cawkwell, J. Chem. Phys.,
|
||||
141, 164123, (2014).
|
||||
|
||||
:link(Niklasson2014)
|
||||
:link(Niklasson2017)
|
||||
[(Niklasson2017)] A. M. N. Niklasson, J. Chem. Phys., 147, 054103 (2017).
|
||||
|
||||
:link(Niklasson2012)
|
||||
[(Niklasson2017)] A. M. N. Niklasson, M. J. Cawkwell, Phys. Rev. B, 86
|
||||
:link(Cawkwell2012)
|
||||
[(Cawkwell2012)] A. M. N. Niklasson, M. J. Cawkwell, Phys. Rev. B, 86
|
||||
(17), 174308 (2012).
|
||||
|
||||
:link(Negre2016)
|
||||
|
||||
@ -44,7 +44,7 @@ the velocity for the force evaluation:
|
||||
|
||||
where the parameter <font size="4">λ</font> depends on the
|
||||
specific choice of DPD parameters, and needs to be tuned on a
|
||||
case-by-case basis. Specification of a {lambda} value is opttional.
|
||||
case-by-case basis. Specification of a {lambda} value is optional.
|
||||
If specified, the setting must be from 0.0 to 1.0. If not specified,
|
||||
a default value of 0.5 is used, which effectively reproduces the
|
||||
standard velocity-Verlet (VV) scheme. For more details, see
|
||||
|
||||
@ -93,7 +93,7 @@ intermediate replica with the previous and the next image:
|
||||
|
||||
Fnudge_parallel = {Kspring} * (|Ri+1 - Ri| - |Ri - Ri-1|) :pre
|
||||
|
||||
Note that in this case the specified {Kspring) is in force/distance
|
||||
Note that in this case the specified {Kspring} is in force/distance
|
||||
units.
|
||||
|
||||
With a value of {ideal}, the spring force is computed as suggested in
|
||||
@ -105,7 +105,7 @@ where RD is the "reaction coordinate" see "neb"_neb.html section, and
|
||||
RDideal is the ideal RD for which all the images are equally spaced.
|
||||
I.e. RDideal = (I-1)*meanDist when the climbing replica is off, where
|
||||
I is the replica number). The meanDist is the average distance
|
||||
between replicas. Note that in this case the specified {Kspring) is
|
||||
between replicas. Note that in this case the specified {Kspring} is
|
||||
in force units.
|
||||
|
||||
Note that the {ideal} form of nudging can often be more effective at
|
||||
@ -113,9 +113,9 @@ keeping the replicas equally spaced.
|
||||
|
||||
:line
|
||||
|
||||
The keyword {perp} specifies if and how a perpendicual nudging force
|
||||
The keyword {perp} specifies if and how a perpendicular nudging force
|
||||
is computed. It adds a spring force perpendicular to the path in
|
||||
order to prevent the path from becoming too kinky. It can
|
||||
order to prevent the path from becoming too strongly kinked. It can
|
||||
significantly improve the convergence of the NEB calculation when the
|
||||
resolution is poor. I.e. when few replicas are used; see
|
||||
"(Maras)"_#Maras1 for details.
|
||||
@ -138,17 +138,17 @@ By default, no additional forces act on the first and last replicas
|
||||
during the NEB relaxation, so these replicas simply relax toward their
|
||||
respective local minima. By using the key word {end}, additional
|
||||
forces can be applied to the first and/or last replicas, to enable
|
||||
them to relax toward a MEP while constraining their energy.
|
||||
them to relax toward a MEP while constraining their energy E to the
|
||||
target energy ETarget.
|
||||
|
||||
The interatomic force Fi for the specified replica becomes:
|
||||
If ETarget>E, the interatomic force Fi for the specified replica becomes:
|
||||
|
||||
Fi = -Grad(V) + (Grad(V) dot T' + (E-ETarget)*Kspring3) T', {when} Grad(V) dot T' < 0
|
||||
Fi = -Grad(V) + (Grad(V) dot T' + (ETarget- E)*Kspring3) T', {when} Grad(V) dot T' > 0
|
||||
:pre
|
||||
|
||||
where E is the current energy of the replica and ETarget is the target
|
||||
energy. The "spring" constant on the difference in energies is the
|
||||
specified {Kspring3} value.
|
||||
The "spring" constant on the difference in energies is the specified
|
||||
{Kspring3} value.
|
||||
|
||||
When {estyle} is specified as {first}, the force is applied to the
|
||||
first replica. When {estyle} is specified as {last}, the force is
|
||||
@ -183,10 +183,9 @@ After converging a NEB calculation using an {estyle} of
|
||||
have a larger energy than the first replica. If this is not the case,
|
||||
the path is probably not a MEP.
|
||||
|
||||
Finally, note that if the last replica converges toward a local
|
||||
minimum which has a larger energy than the energy of the first
|
||||
replica, a NEB calculation using an {estyle} of {last/efirst} or
|
||||
{last/efirst/middle} cannot reach final convergence.
|
||||
Finally, note that the last replica may never reach the target energy
|
||||
if it is stuck in a local minima which has a larger energy than the
|
||||
target energy.
|
||||
|
||||
[Restart, fix_modify, output, run start/stop, minimize info:]
|
||||
|
||||
|
||||
@ -393,32 +393,36 @@ thermostatting and barostatting.
|
||||
:line
|
||||
|
||||
These fixes compute a temperature and pressure each timestep. To do
|
||||
this, the fix creates its own computes of style "temp" and "pressure",
|
||||
as if one of these two sets of commands had been issued:
|
||||
this, the thermostat and barostat fixes create their own computes of
|
||||
style "temp" and "pressure", as if one of these sets of commands had
|
||||
been issued:
|
||||
|
||||
For fix nvt:
|
||||
compute fix-ID_temp group-ID temp
|
||||
compute fix-ID_press group-ID pressure fix-ID_temp :pre
|
||||
|
||||
For fix npt and fix nph:
|
||||
compute fix-ID_temp all temp
|
||||
compute fix-ID_press all pressure fix-ID_temp :pre
|
||||
|
||||
See the "compute temp"_compute_temp.html and "compute
|
||||
pressure"_compute_pressure.html commands for details. Note that the
|
||||
IDs of the new computes are the fix-ID + underscore + "temp" or fix_ID
|
||||
+ underscore + "press". For fix nvt, the group for the new computes
|
||||
is the same as the fix group. For fix nph and fix npt, the group for
|
||||
the new computes is "all" since pressure is computed for the entire
|
||||
system.
|
||||
For fix nvt, the group for the new temperature compute is the same as
|
||||
the fix group. For fix npt and fix nph, the group for both the new
|
||||
temperature and pressure compute is "all" since pressure is computed
|
||||
for the entire system. In the case of fix nph, the temperature
|
||||
compute is not used for thermostatting, but just for a kinetic-energy
|
||||
contribution to the pressure. See the "compute
|
||||
temp"_compute_temp.html and "compute pressure"_compute_pressure.html
|
||||
commands for details. Note that the IDs of the new computes are the
|
||||
fix-ID + underscore + "temp" or fix_ID + underscore + "press".
|
||||
|
||||
Note that these are NOT the computes used by thermodynamic output (see
|
||||
the "thermo_style"_thermo_style.html command) with ID = {thermo_temp}
|
||||
and {thermo_press}. This means you can change the attributes of this
|
||||
and {thermo_press}. This means you can change the attributes of these
|
||||
fix's temperature or pressure via the
|
||||
"compute_modify"_compute_modify.html command or print this temperature
|
||||
or pressure during thermodynamic output via the "thermo_style
|
||||
custom"_thermo_style.html command using the appropriate compute-ID.
|
||||
It also means that changing attributes of {thermo_temp} or
|
||||
{thermo_press} will have no effect on this fix.
|
||||
"compute_modify"_compute_modify.html command. Or you can print this
|
||||
temperature or pressure during thermodynamic output via the
|
||||
"thermo_style custom"_thermo_style.html command using the appropriate
|
||||
compute-ID. It also means that changing attributes of {thermo_temp}
|
||||
or {thermo_press} will have no effect on this fix.
|
||||
|
||||
Like other fixes that perform thermostatting, fix nvt and fix npt can
|
||||
be used with "compute commands"_compute.html that calculate a
|
||||
|
||||
228
doc/src/fix_nh_uef.txt
Normal file
@ -0,0 +1,228 @@
|
||||
<"LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c
|
||||
|
||||
:link(lws,http://lammps.sandia.gov)
|
||||
:link(ld,Manual.html)
|
||||
:link(lc,Section_commands.html#comm)
|
||||
|
||||
:line
|
||||
|
||||
fix nvt/uef command :h3
|
||||
fix npt/uef command :h3
|
||||
|
||||
[Syntax:]
|
||||
|
||||
fix ID group-ID style_name erate edot_x edot_y temp Tstart Tstop Tdamp keyword value ... :pre
|
||||
|
||||
ID, group-ID are documented in "fix"_fix.html command :ulb,l
|
||||
style_name = {nvt/uef} or {npt/uef} :l
|
||||
{Tstart}, {Tstop}, and {Tdamp} are documented in the "fix npt"_fix_nh.html command :l
|
||||
{edot_x} and {edot_y} are the strain rates in the x and y directions (1/(time units)) :l
|
||||
one or more keyword/value pairs may be appended :l
|
||||
keyword = {ext} or {strain} or {iso} or {x} or {y} or {z} or {tchain} or {pchain} or {tloop} or {ploop} or {mtk}
|
||||
{ext} value = {x} or {y} or {z} or {xy} or {yz} or {xz} = external dimensions
|
||||
sets the external dimensions used to calculate the scalar pressure
|
||||
{strain} values = e_x e_y = initial strain
|
||||
usually not needed, but may be needed to resume a run with a data file.
|
||||
{iso}, {x}, {y}, {z}, {tchain}, {pchain}, {tloop}, {ploop}, {mtk} keywords
|
||||
documented by the "fix npt"_fix_nh.html command :pre
|
||||
:ule
|
||||
|
||||
[Examples:]
|
||||
|
||||
fix uniax_nvt all nvt/uef temp 400 400 100 erate 0.00001 -0.000005
|
||||
fix biax_nvt all nvt/uef temp 400 400 100 erate 0.000005 0.000005
|
||||
fix uniax_npt all npt/uef temp 400 400 300 iso 1 1 3000 erate 0.00001 -0.000005 ext yz
|
||||
fix biax_npt all npt/uef temp 400 400 100 erate -0.00001 0.000005 x 1 1 3000 :pre
|
||||
|
||||
[Description:]
|
||||
|
||||
This fix can be used to simulate non-equilibrium molecular dynamics
|
||||
(NEMD) under diagonal flow fields, including uniaxial and biaxial
|
||||
flow. Simulations under continuous extensional flow may be carried
|
||||
out for an indefinite amount of time. It is an implementation of the
|
||||
boundary conditions from "(Dobson)"_#Dobson, and also uses numerical
|
||||
lattice reduction as was proposed by "(Hunt)"_#Hunt. The lattice
|
||||
reduction algorithm is from "(Semaev)"_Semaev. The fix is intended for
|
||||
simulations of homogeneous flows, and integrates the SLLOD equations
|
||||
of motion, originally proposed by Hoover and Ladd (see "(Evans and
|
||||
Morriss)"_#Sllod). Additional detail about this implementation can be
|
||||
found in "(Nicholson and Rutledge)"_#Nicholson.
|
||||
|
||||
Note that NEMD simulations of a continuously strained system can be
|
||||
performed using the "fix deform"_fix_deform.html, "fix
|
||||
nvt/sllod"_fix_nvt_sllod.html, and "compute
|
||||
temp/deform"_compute_temp_deform.html commands.
|
||||
|
||||
The applied flow field is set by the {eps} keyword. The values
|
||||
{edot_x} and {edot_y} correspond to the strain rates in the xx and yy
|
||||
directions. It is implicitly assumed that the flow field is
|
||||
traceless, and therefore the strain rate in the zz direction is eqal
|
||||
to -({edot_x} + {edot_y}).
|
||||
|
||||
NOTE: Due to an instability in the SLLOD equations under extension,
|
||||
"fix momentum"_fix_momentum.html should be used to regularly reset the
|
||||
linear momentum.
|
||||
|
||||
The boundary conditions require a simulation box that does not have a
|
||||
consistent alignment relative to the applied flow field. Since LAMMPS
|
||||
utilizes an upper-triangular simulation box, it is not possible to
|
||||
express the evolving simulation box in the same coordinate system as
|
||||
the flow field. This fix keeps track of two coordinate systems: the
|
||||
flow frame, and the upper triangular LAMMPS frame. The coordinate
|
||||
systems are related to each other through the QR decomposition, as is
|
||||
illustrated in the image below.
|
||||
|
||||
:c,image(JPG/uef_frames.jpg)
|
||||
|
||||
During most molecular dynamics operations, the system is represented
|
||||
in the LAMMPS frame. Only when the positions and velocities are
|
||||
updated is the system rotated to the flow frame, and it is rotated
|
||||
back to the LAMMPS frame immediately afterwards. For this reason, all
|
||||
vector-valued quantities (except for the tensors from
|
||||
"compute_pressure/uef"_compute_pressure_uef.html and
|
||||
"compute_temp/uef"_compute_temp_uef.html) will be computed in the
|
||||
LAMMPS frame. Rotationally invariant scalar quantities like the
|
||||
temperature and hydrostatic pressure are frame-invariant and will be
|
||||
computed correctly. Additionally, the system is in the LAMMPS frame
|
||||
during all of the output steps, and therefore trajectory files made
|
||||
using the dump command will be in the LAMMPS frame unless the
|
||||
"dump_cfg/uef"_dump_cfg_uef.html command is used.
|
||||
|
||||
:line
|
||||
|
||||
Temperature control is achieved with the default Nose-Hoover style
|
||||
thermostat documented in "fix npt"_fix_nh.html. When this fix is
|
||||
active, only the peculiar velocity of each atom is stored, defined as
|
||||
the velocity relative to the streaming velocity. This is in contrast
|
||||
to "fix nvt/sllod"_fix_nvt_sllod.html, which uses a lab-frame
|
||||
velocity, and removes the contribution from the streaming velocity in
|
||||
order to compute the temperature.
|
||||
|
||||
Pressure control is achieved using the default Nose-Hoover barostat
|
||||
documented in "fix npt"_fix_nh.html. There are two ways to control the
|
||||
pressure using this fix. The first method involves using the {ext}
|
||||
keyword along with the {iso} pressure style. With this method, the
|
||||
pressure is controlled by scaling the simulation box isotropically to
|
||||
achieve the average pressure only in the directions specified by
|
||||
{ext}. For example, if the {ext} value is set to {xy}, the average
|
||||
pressure (Pxx+Pyy)/2 will be controlled.
|
||||
|
||||
This example command will control the total hydrostatic pressure under
|
||||
uniaxial tension:
|
||||
|
||||
fix f1 all npt/uef temp 0.7 0.7 0.5 iso 1 1 5 erate -0.5 -0.5 ext xyz :pre
|
||||
|
||||
This example command will control the average stress in compression
|
||||
directions, which would typically correspond to free surfaces under
|
||||
drawing with uniaxial tension:
|
||||
|
||||
fix f2 all npt/uef temp 0.7 0.7 0.5 iso 1 1 5 erate -0.5 -0.5 ext xy :pre
|
||||
|
||||
The second method for pressure control involves setting the normal
|
||||
stresses using the {x}, {y} , and/or {z} keywords. When using this
|
||||
method, the same pressure must be specified via {Pstart} and {Pstop}
|
||||
for all dimensions controlled. Any choice of pressure conditions that
|
||||
would cause LAMMPS to compute a deviatoric stress are not permissible
|
||||
and will result in an error. Additionally, all dimensions with
|
||||
controlled stress must have the same applied strain rate. The {ext}
|
||||
keyword must be set to the default value ({xyz}) when using this
|
||||
method.
|
||||
|
||||
For example, the following commands will work:
|
||||
|
||||
fix f3 all npt/uef temp 0.7 0.7 0.5 x 1 1 5 y 1 1 5 erate -0.5 -0.5
|
||||
fix f4 all npt/uef temp 0.7 0.7 0.5 z 1 1 5 erate 0.5 0.5 :pre
|
||||
|
||||
The following commands will not work:
|
||||
|
||||
fix f5 all npt/uef temp 0.7 0.7 0.5 x 1 1 5 z 1 1 5 erate -0.5 -0.5
|
||||
fix f6 all npt/uef temp 0.7 0.7 0.5 x 1 1 5 z 2 2 5 erate 0.5 0.5 :pre
|
||||
|
||||
:line
|
||||
|
||||
These fix computes a temperature and pressure each timestep. To do
|
||||
this, it creates its own computes of style "temp/uef" and
|
||||
"pressure/uef", as if one of these two sets of commands had been
|
||||
issued:
|
||||
|
||||
compute fix-ID_temp group-ID temp/uef
|
||||
compute fix-ID_press group-ID pressure/uef fix-ID_temp :pre
|
||||
|
||||
compute fix-ID_temp all temp/uef
|
||||
compute fix-ID_press all pressure/uef fix-ID_temp :pre
|
||||
|
||||
See the "compute temp/uef"_compute_temp_uef.html and "compute
|
||||
pressure/uef"_compute_pressure_uef.html commands for details. Note
|
||||
that the IDs of the new computes are the fix-ID + underscore + "temp"
|
||||
or fix_ID + underscore + "press".
|
||||
|
||||
[Restart, fix_modify, output, run start/stop, minimize info:]
|
||||
|
||||
The fix writes the state of all the thermostat and barostat variables,
|
||||
as well as the cumulative strain applied, to "binary restart
|
||||
files"_restart.html. See the "read_restart"_read_restart.html command
|
||||
for info on how to re-specify a fix in an input script that reads a
|
||||
restart file, so that the operation of the fix continues in an
|
||||
uninterrupted fashion.
|
||||
|
||||
NOTE: It is not necessary to set the {strain} keyword when resuming a
|
||||
run from a restart file. Only for resuming from data files, which do
|
||||
not contain the cumulative applied strain, will this keyword be
|
||||
necessary.
|
||||
|
||||
This fix can be used with the "fix_modify"_fix_modify.html {temp} and
|
||||
{press} options. The temperature and pressure computes used must be of
|
||||
type {temp/uef} and {pressure/uef}.
|
||||
|
||||
This fix computes the same global scalar and vecor quantities as "fix
|
||||
npt"_fix_nh.html.
|
||||
|
||||
The fix is not invoked during "energy minimization"_minimize.html.
|
||||
|
||||
[Restrictions:]
|
||||
|
||||
This fix is part of the USER-UEF package. It is only enabled if LAMMPS
|
||||
was built with that package. See the "Making
|
||||
LAMMPS"_Section_start.html#start_3 section for more info.
|
||||
|
||||
Due to requirements of the boundary conditions, when the {strain}
|
||||
keyword is set to zero (or unset), the initial simulation box must be
|
||||
cubic and have style triclinic. If the box is initially of type ortho,
|
||||
use "change_box"_change_box.html before invoking the fix.
|
||||
|
||||
NOTE: When resuming from restart files, you may need to use "box tilt
|
||||
large"_box.html since lammps has internal criteria from lattice
|
||||
reduction that are not the same as the criteria in the numerical
|
||||
lattice reduction algorithm.
|
||||
|
||||
[Related commands:]
|
||||
|
||||
"fix nvt"_fix_nh.html, "fix nvt/sllod"_fix_nvt_sllod.html, "compute
|
||||
temp/uef"_compute_temp_uef.html, "compute
|
||||
pressure/uef"_compute_pressure_uef.html, "dump
|
||||
cfg/uef"_dump_cfg_uef.html
|
||||
|
||||
[Default:]
|
||||
|
||||
The default keyword values specific to this fix are exy = xyz, strain
|
||||
= 0 0. The remaining defaults are the same as for {fix
|
||||
npt}_fix_nh.html except tchain = 1. The reason for this change is
|
||||
given in "fix nvt/sllod"_fix_nvt_sllod.html.
|
||||
|
||||
:line
|
||||
|
||||
:link(Dobson)
|
||||
[(Dobson)] Dobson, J Chem Phys, 141, 184103 (2014).
|
||||
|
||||
:link(Hunt)
|
||||
[(Hunt)] Hunt, Mol Simul, 42, 347 (2016).
|
||||
|
||||
:link(Semaev)
|
||||
[(Semaev)] Semaev, Cryptography and Lattices, 181 (2001).
|
||||
|
||||
:link(Sllod)
|
||||
[(Evans and Morriss)] Evans and Morriss, Phys Rev A, 30, 1528 (1984).
|
||||
|
||||
:link(Nicholson)
|
||||
[(Nicholson and Rutledge)] Nicholson and Rutledge, J Chem Phys, 145,
|
||||
244903 (2016).
|
||||
@ -111,6 +111,10 @@ need to communicate their new values to/from ghost atoms, an operation
|
||||
that can be invoked from within a "pair style"_pair_style.html or
|
||||
"fix"_fix.html or "compute"_compute.html that you write.
|
||||
|
||||
NOTE: If this fix is defined [after] the simulation box is created,
|
||||
a 'run 0' command should be issued to properly initialize the storage
|
||||
created by this fix.
|
||||
|
||||
:line
|
||||
|
||||
This fix is one of a small number that can be defined in an input
|
||||
@ -155,7 +159,7 @@ these commands could be used:
|
||||
|
||||
fix prop all property/atom mol
|
||||
variable cluster atom ((id-1)/10)+1
|
||||
set id * mol v_cluster :pre
|
||||
set atom * mol v_cluster :pre
|
||||
|
||||
The "atom-style variable"_variable.html will create values for atoms
|
||||
with IDs 31,32,33,...40 that are 4.0,4.1,4.2,...,4.9. When the
|
||||
|
||||
@ -6,14 +6,14 @@
|
||||
|
||||
:line
|
||||
|
||||
fix python command :h3
|
||||
fix python/invoke command :h3
|
||||
|
||||
[Syntax:]
|
||||
|
||||
fix ID group-ID python N callback function_name :pre
|
||||
fix ID group-ID python/invoke N callback function_name :pre
|
||||
|
||||
ID, group-ID are ignored by this fix :ulb,l
|
||||
python = style name of this fix command :l
|
||||
python/invoke = style name of this fix command :l
|
||||
N = execute every N steps :l
|
||||
callback = {post_force} or {end_of_step} :l
|
||||
{post_force} = callback after force computations on atoms every N time steps
|
||||
@ -36,8 +36,8 @@ def end_of_step_callback(lammps_ptr):
|
||||
# access LAMMPS state using Python interface
|
||||
""" :pre
|
||||
|
||||
fix pf all python 50 post_force post_force_callback
|
||||
fix eos all python 50 end_of_step end_of_step_callback :pre
|
||||
fix pf all python/invoke 50 post_force post_force_callback
|
||||
fix eos all python/invoke 50 end_of_step end_of_step_callback :pre
|
||||
|
||||
[Description:]
|
||||
|
||||
102
doc/src/fix_python_move.txt
Normal file
@ -0,0 +1,102 @@
|
||||
"LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c
|
||||
|
||||
:link(lws,http://lammps.sandia.gov)
|
||||
:link(ld,Manual.html)
|
||||
:link(lc,Section_commands.html#comm)
|
||||
|
||||
:line
|
||||
|
||||
fix python/move command :h3
|
||||
|
||||
[Syntax:]
|
||||
|
||||
fix python/move pymodule.CLASS :pre
|
||||
|
||||
pymodule.CLASS = use class [CLASS] in module/file [pymodule] to compute how to move atoms
|
||||
|
||||
[Examples:]
|
||||
|
||||
fix 1 all python/move py_nve.NVE
|
||||
fix 1 all python/move py_nve.NVE_OPT :pre
|
||||
|
||||
[Description:]
|
||||
|
||||
The {python/move} fix style provides a way to define ways how particles
|
||||
are moved during an MD run from python script code, that is loaded from
|
||||
a file into LAMMPS and executed at the various steps where other fixes
|
||||
can be executed. This python script must contain specific python class
|
||||
definitions.
|
||||
|
||||
This allows to implement complex position updates and also modified
|
||||
time integration methods. Due to python being an interpreted language,
|
||||
however, the performance of this fix can be moderately to significantly
|
||||
slower than the corresponding C++ code. For specific cases, this
|
||||
performance penalty can be limited through effective use of NumPy.
|
||||
|
||||
:line
|
||||
|
||||
The python module file has to start with the following code:
|
||||
|
||||
from __future__ import print_function
|
||||
import lammps
|
||||
import ctypes
|
||||
import traceback
|
||||
import numpy as np
|
||||
#
|
||||
class LAMMPSFix(object):
|
||||
def __init__(self, ptr, group_name="all"):
|
||||
self.lmp = lammps.lammps(ptr=ptr)
|
||||
self.group_name = group_name
|
||||
#
|
||||
class LAMMPSFixMove(LAMMPSFix):
|
||||
def __init__(self, ptr, group_name="all"):
|
||||
super(LAMMPSFixMove, self).__init__(ptr, group_name)
|
||||
#
|
||||
def init(self):
|
||||
pass
|
||||
#
|
||||
def initial_integrate(self, vflag):
|
||||
pass
|
||||
#
|
||||
def final_integrate(self):
|
||||
pass
|
||||
#
|
||||
def initial_integrate_respa(self, vflag, ilevel, iloop):
|
||||
pass
|
||||
#
|
||||
def final_integrate_respa(self, ilevel, iloop):
|
||||
pass
|
||||
#
|
||||
def reset_dt(self):
|
||||
pass :pre
|
||||
|
||||
Any classes implementing new atom motion functionality have to be
|
||||
derived from the [LAMMPSFixMove] class, overriding the available
|
||||
methods as needed.
|
||||
|
||||
Examples for how to do this are in the {examples/python} folder.
|
||||
|
||||
:line
|
||||
|
||||
[Restart, fix_modify, output, run start/stop, minimize info:]
|
||||
|
||||
No information about this fix is written to "binary restart
|
||||
files"_restart.html. None of the "fix_modify"_fix_modify.html options
|
||||
are relevant to this fix. No global or per-atom quantities are stored
|
||||
by this fix for access by various "output
|
||||
commands"_Section_howto.html#howto_15. No parameter of this fix can
|
||||
be used with the {start/stop} keywords of the "run"_run.html command.
|
||||
This fix is not invoked during "energy minimization"_minimize.html.
|
||||
|
||||
[Restrictions:]
|
||||
|
||||
This pair style is part of the PYTHON package. It is only enabled if
|
||||
LAMMPS was built with that package. See the "Making
|
||||
LAMMPS"_Section_start.html#start_3 section for more info.
|
||||
|
||||
[Related commands:]
|
||||
|
||||
"fix nve"_fix_nve.html, "fix python/invoke"_fix_python_invoke.html
|
||||
|
||||
[Default:] none
|
||||
|
||||
56
doc/src/fix_rhok.txt
Normal file
@ -0,0 +1,56 @@
|
||||
"LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c
|
||||
|
||||
:link(lws,http://lammps.sandia.gov)
|
||||
:link(ld,Manual.html)
|
||||
:link(lc,Section_commands.html#comm)
|
||||
|
||||
:line
|
||||
|
||||
fix rhok command :h3
|
||||
|
||||
fix ID group-ID rhok nx ny nz K a :pre
|
||||
|
||||
ID, group-ID are documented in "fix"_fix.html command
|
||||
nx, ny, nz = k-vektor of collective density field
|
||||
K = spring constant of bias potential
|
||||
a = anchor point of bias potential :ul
|
||||
|
||||
[Examples:]
|
||||
|
||||
fix bias all rhok 16 0 0 4.0 16.0
|
||||
fix 1 all npt temp 0.8 0.8 4.0 z 2.2 2.2 8.0
|
||||
# output of 4 values from fix rhok: U_bias rho_k_RE rho_k_IM |rho_k|
|
||||
thermo_style custom step temp pzz lz f_bias f_bias\[1\] f_bias\[2\] f_bias\[3\] :pre
|
||||
|
||||
[Description:]
|
||||
|
||||
The fix applies a force to atoms given by the potential
|
||||
|
||||
:c,image(Eqs/fix_rhok.jpg)
|
||||
|
||||
as described in "(Pedersen)"_#Pedersen.
|
||||
|
||||
This field, which biases configurations with long-range order, can be
|
||||
used to study crystal-liquid interfaces and determine melting
|
||||
temperatures "(Pedersen)"_#Pedersen.
|
||||
|
||||
An example of using the interface pinning method is located in the
|
||||
{examples/USER/misc/rhok} directory.
|
||||
|
||||
[Restrictions:]
|
||||
|
||||
This fix is part of the MISC package. It is only enabled if LAMMPS
|
||||
was built with that package. See the "Making
|
||||
LAMMPS"_Section_start.html#start_3 section for more info.
|
||||
|
||||
[Related commands:]
|
||||
|
||||
"thermo_style"_thermo_style.html
|
||||
|
||||
[Default:] none
|
||||
|
||||
:line
|
||||
|
||||
:link(Pedersen)
|
||||
[(Pedersen)] Pedersen, J. Chem. Phys., 139, 104102 (2013).
|
||||
|
||||
@ -7,11 +7,17 @@
|
||||
:line
|
||||
|
||||
fix rigid command :h3
|
||||
fix rigid/omp command :h3
|
||||
fix rigid/nve command :h3
|
||||
fix rigid/nve/omp command :h3
|
||||
fix rigid/nvt command :h3
|
||||
fix rigid/nvt/omp command :h3
|
||||
fix rigid/npt command :h3
|
||||
fix rigid/npt/omp command :h3
|
||||
fix rigid/nph command :h3
|
||||
fix rigid/nph/omp command :h3
|
||||
fix rigid/small command :h3
|
||||
fix rigid/small/omp command :h3
|
||||
fix rigid/nve/small command :h3
|
||||
fix rigid/nvt/small command :h3
|
||||
fix rigid/npt/small command :h3
|
||||
@ -26,6 +32,9 @@ style = {rigid} or {rigid/nve} or {rigid/nvt} or {rigid/npt} or {rigid/nph} or {
|
||||
bodystyle = {single} or {molecule} or {group} :l
|
||||
{single} args = none
|
||||
{molecule} args = none
|
||||
{custom} args = {i_propname} or {v_varname}
|
||||
i_propname = an integer property defined via fix property/atom
|
||||
v_varname = an atom-style or atomfile-style variable
|
||||
{group} args = N groupID1 groupID2 ...
|
||||
N = # of groups
|
||||
groupID1, groupID2, ... = list of N group IDs :pre
|
||||
@ -81,6 +90,16 @@ fix 1 particles rigid/npt molecule temp 1.0 1.0 5.0 x 0.5 0.5 1.0 z 0.5 0.5 1.0
|
||||
fix 1 water rigid/nph molecule iso 0.5 0.5 1.0
|
||||
fix 1 particles rigid/npt/small molecule temp 1.0 1.0 1.0 iso 0.5 0.5 1.0 :pre
|
||||
|
||||
variable bodyid atom 1.0*gmask(clump1)+2.0*gmask(clump2)+3.0*gmask(clump3)
|
||||
fix 1 clump rigid custom v_bodyid :pre
|
||||
|
||||
variable bodyid atomfile bodies.txt
|
||||
fix 1 clump rigid custom v_bodyid :pre
|
||||
|
||||
fix 0 all property/atom i_bodyid
|
||||
read_restart data.rigid fix 0 NULL Bodies
|
||||
fix 1 clump rigid/small custom i_bodyid :pre
|
||||
|
||||
[Description:]
|
||||
|
||||
Treat one or more sets of atoms as independent rigid bodies. This
|
||||
@ -100,7 +119,7 @@ of a biomolecule such as a protein.
|
||||
|
||||
Example of small rigid bodies are patchy nanoparticles, such as those
|
||||
modeled in "this paper"_#Zhang1 by Sharon Glotzer's group, clumps of
|
||||
granular particles, lipid molecules consiting of one or more point
|
||||
granular particles, lipid molecules consisting of one or more point
|
||||
dipoles connected to other spheroids or ellipsoids, irregular
|
||||
particles built from line segments (2d) or triangles (3d), and
|
||||
coarse-grain models of nano or colloidal particles consisting of a
|
||||
@ -203,11 +222,11 @@ most one rigid body. Which atoms are in which bodies can be defined
|
||||
via several options.
|
||||
|
||||
NOTE: With the {rigid/small} styles, which require that {bodystyle} be
|
||||
specified as {molecule}, you can define a system that has no rigid
|
||||
bodies initially. This is useful when you are using the {mol} keyword
|
||||
in conjunction with another fix that is adding rigid bodies on-the-fly
|
||||
as molecules, such as "fix deposit"_fix_deposit.html or "fix
|
||||
pour"_fix_pour.html.
|
||||
specified as {molecule} or {custom}, you can define a system that has
|
||||
no rigid bodies initially. This is useful when you are using the {mol}
|
||||
keyword in conjunction with another fix that is adding rigid bodies
|
||||
on-the-fly as molecules, such as "fix deposit"_fix_deposit.html or
|
||||
"fix pour"_fix_pour.html.
|
||||
|
||||
For bodystyle {single} the entire fix group of atoms is treated as one
|
||||
rigid body. This option is only allowed for the {rigid} styles.
|
||||
@ -222,6 +241,15 @@ molecule ID = 0) surrounding rigid bodies, this may not be what you
|
||||
want. Thus you should be careful to use a fix group that only
|
||||
includes atoms you want to be part of rigid bodies.
|
||||
|
||||
Bodystyle {custom} is similar to bodystyle {molecule}, however some
|
||||
custom properties are used to group atoms into rigid bodies. The
|
||||
special case for molecule/body ID = 0 is not available. Possible
|
||||
custom properties are an integer property associated with atoms through
|
||||
"fix property/atom"_fix_property_atom.html or an atom style variable
|
||||
or an atomfile style variable. For the latter two, the variable value
|
||||
will be rounded to an integer and then rigid bodies defined from
|
||||
those values.
|
||||
|
||||
For bodystyle {group}, each of the listed groups is treated as a
|
||||
separate rigid body. Only atoms that are also in the fix group are
|
||||
included in each rigid body. This option is only allowed for the
|
||||
|
||||
@ -14,15 +14,12 @@ fix ID group-ID smd/integrate_tlsph keyword values :pre
|
||||
|
||||
ID, group-ID are documented in "fix"_fix.html command
|
||||
smd/integrate_tlsph = style name of this fix command
|
||||
zero or more keyword/value pairs may be appended :ul
|
||||
|
||||
keyword = {limit_velocity} :l
|
||||
zero or more keyword/value pairs may be appended
|
||||
keyword = {limit_velocity} :ul
|
||||
|
||||
{limit_velocity} value = max_vel
|
||||
max_vel = maximum allowed velocity :pre
|
||||
|
||||
:ule
|
||||
|
||||
[Examples:]
|
||||
|
||||
fix 1 all smd/integrate_tlsph
|
||||
|
||||
@ -14,9 +14,8 @@ fix ID group-ID smd/integrate_ulsph keyword :pre
|
||||
|
||||
ID, group-ID are documented in "fix"_fix.html command
|
||||
smd/integrate_ulsph = style name of this fix command
|
||||
zero or more keyword/value pairs may be appended :ul
|
||||
|
||||
keyword = adjust_radius or limit_velocity
|
||||
zero or more keyword/value pairs may be appended
|
||||
keyword = adjust_radius or limit_velocity :ul
|
||||
|
||||
adjust_radius values = adjust_radius_factor min_nn max_nn
|
||||
adjust_radius_factor = factor which scale the smooth/kernel radius
|
||||
@ -28,7 +27,7 @@ limit_velocity values = max_velocity
|
||||
|
||||
[Examples:]
|
||||
|
||||
fix 1 all smd/integrate_ulsph adjust_radius 1.02 25 50 :pre
|
||||
fix 1 all smd/integrate_ulsph adjust_radius 1.02 25 50
|
||||
fix 1 all smd/integrate_ulsph limit_velocity 1000 :pre
|
||||
|
||||
[Description:]
|
||||
|
||||
19
doc/src/fix_surface_global.txt
Normal file
@ -0,0 +1,19 @@
|
||||
"LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c
|
||||
|
||||
:link(lws,http://lammps.sandia.gov)
|
||||
:link(ld,Manual.html)
|
||||
:link(lc,Section_commands.html#comm)
|
||||
|
||||
:line
|
||||
|
||||
fix wall/surface/globale command :h3
|
||||
|
||||
[Description:]
|
||||
|
||||
This feature is not yet implemented.
|
||||
|
||||
[Related commands:]
|
||||
|
||||
"dump image"_dump_image.html
|
||||
|
||||
|
||||
@ -34,7 +34,7 @@ by performing a nonequilibrium thermodynamic integration between the
|
||||
solid of interest and an Einstein crystal. A detailed explanation of
|
||||
how to use this command and choose its parameters for optimal
|
||||
performance and accuracy is given in the paper by
|
||||
"Freitas"_#Freitas. The paper also presents a short summary of the
|
||||
"Freitas"_#Freitas1. The paper also presents a short summary of the
|
||||
theory of nonequilibrium thermodynamic integrations.
|
||||
|
||||
The thermodynamic integration procedure is performed by rescaling the
|
||||
@ -67,13 +67,13 @@ of lambda is kept equal to zero and the fix has no other effect on the
|
||||
dynamics of the system.
|
||||
|
||||
The processes described above is known as nonequilibrium thermodynamic
|
||||
integration and is has been shown ("Freitas"_#Freitas) to present a
|
||||
integration and is has been shown ("Freitas"_#Freitas1) to present a
|
||||
much superior efficiency when compared to standard equilibrium
|
||||
methods. The reason why the switching it is made in both directions
|
||||
(potential to Einstein crystal and back) is to eliminate the
|
||||
dissipated heat due to the nonequilibrium process. Further details
|
||||
about nonequilibrium thermodynamic integration and its implementation
|
||||
in LAMMPS is available in "Freitas"_#Freitas.
|
||||
in LAMMPS is available in "Freitas"_#Freitas1.
|
||||
|
||||
The {function} keyword allows the use of two different lambda
|
||||
paths. Option {1} results in a constant rate of change of lambda with
|
||||
@ -94,7 +94,7 @@ thermodynamic integration. The use of option {2} is recommended since
|
||||
it results in better accuracy and less dissipation without any
|
||||
increase in computational resources cost.
|
||||
|
||||
NOTE: As described in "Freitas"_#Freitas, it is important to keep the
|
||||
NOTE: As described in "Freitas"_#Freitas1, it is important to keep the
|
||||
center-of-mass fixed during the thermodynamic integration. A nonzero
|
||||
total velocity will result in divergences during the integration due
|
||||
to the fact that the atoms are 'attached' to their equilibrium
|
||||
@ -156,7 +156,7 @@ The keyword default is function = 1.
|
||||
|
||||
:line
|
||||
|
||||
:link(Freitas)
|
||||
:link(Freitas1)
|
||||
[(Freitas)] Freitas, Asta, and de Koning, Computational Materials
|
||||
Science, 112, 333 (2016).
|
||||
|
||||
|
||||
@ -59,6 +59,7 @@ Fixes :h1
|
||||
fix_langevin
|
||||
fix_langevin_drude
|
||||
fix_langevin_eff
|
||||
fix_latte
|
||||
fix_lb_fluid
|
||||
fix_lb_momentum
|
||||
fix_lb_pc
|
||||
@ -76,6 +77,7 @@ Fixes :h1
|
||||
fix_neb
|
||||
fix_nh
|
||||
fix_nh_eff
|
||||
fix_nh_uef
|
||||
fix_nph_asphere
|
||||
fix_nph_body
|
||||
fix_nph_sphere
|
||||
@ -113,7 +115,8 @@ Fixes :h1
|
||||
fix_press_berendsen
|
||||
fix_print
|
||||
fix_property_atom
|
||||
fix_python
|
||||
fix_python_invoke
|
||||
fix_python_move
|
||||
fix_qbmsst
|
||||
fix_qeq
|
||||
fix_qeq_comb
|
||||
@ -124,6 +127,7 @@ Fixes :h1
|
||||
fix_reaxc_species
|
||||
fix_recenter
|
||||
fix_restrain
|
||||
fix_rhok
|
||||
fix_rigid
|
||||
fix_rx
|
||||
fix_saed_vtk
|
||||
@ -144,6 +148,7 @@ Fixes :h1
|
||||
fix_srd
|
||||
fix_store_force
|
||||
fix_store_state
|
||||
fix_surface_global
|
||||
fix_temp_berendsen
|
||||
fix_temp_csvr
|
||||
fix_temp_rescale
|
||||
|
||||
65
doc/src/improper_inversion_harmonic.txt
Normal file
@ -0,0 +1,65 @@
|
||||
"LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c
|
||||
|
||||
:link(lws,http://lammps.sandia.gov)
|
||||
:link(ld,Manual.html)
|
||||
:link(lc,Section_commands.html#comm)
|
||||
|
||||
:line
|
||||
|
||||
improper_style inversion/harmonic command :h3
|
||||
|
||||
[Syntax:]
|
||||
|
||||
improper_style inversion/harmonic :pre
|
||||
|
||||
[Examples:]
|
||||
|
||||
improper_style inversion/harmonic
|
||||
improper_coeff 1 18.776340 0.000000 :pre
|
||||
|
||||
[Description:]
|
||||
|
||||
The {inversion/harmonic} improper style follows the Wilson-Decius
|
||||
out-of-plane angle definition and uses an harmonic potential:
|
||||
|
||||
:c,image(Eqs/improper_inversion_harmonic.jpg)
|
||||
|
||||
where K is the force constant and omega is the angle evaluated for
|
||||
all three axis-plane combinations centered around the atom I. For
|
||||
the IL axis and the IJK plane omega looks as follows:
|
||||
|
||||
:c,image(Eqs/umbrella.jpg)
|
||||
|
||||
Note that the {inversion/harmonic} angle term evaluation differs to
|
||||
the "improper_umbrella"_improper_umbrella.html due to the cyclic
|
||||
evaluation of all possible angles omega.
|
||||
|
||||
The following coefficients must be defined for each improper type via
|
||||
the "improper_coeff"_improper_coeff.html command as in the example
|
||||
above, or in the data file or restart files read by the
|
||||
"read_data"_read_data.html or "read_restart"_read_restart.html
|
||||
commands:
|
||||
|
||||
K (energy)
|
||||
omega0 (degrees) :ul
|
||||
|
||||
If omega0 = 0 the potential term has a minimum for the planar
|
||||
structure. Otherwise it has two minima at +/- omega0, with a barrier
|
||||
in between.
|
||||
|
||||
:line
|
||||
|
||||
[Restrictions:]
|
||||
|
||||
This improper style can only be used if LAMMPS was built with the
|
||||
USER-MOFFF package. See the "Making
|
||||
LAMMPS"_Section_start.html#start_3 section for more info on packages.
|
||||
|
||||
[Related commands:]
|
||||
|
||||
"improper_coeff"_improper_coeff.html
|
||||
|
||||
[Default:] none
|
||||
|
||||
:line
|
||||
|
||||
@ -12,6 +12,7 @@ Improper Styles :h1
|
||||
improper_fourier
|
||||
improper_harmonic
|
||||
improper_hybrid
|
||||
improper_inversion_harmonic
|
||||
improper_none
|
||||
improper_ring
|
||||
improper_umbrella
|
||||
|
||||
@ -12,7 +12,7 @@ info command :h3
|
||||
|
||||
info args :pre
|
||||
|
||||
args = one or more of the following keywords: {out}, {all}, {system}, {memory}, {communication}, {computes}, {dumps}, {fixes}, {groups}, {regions}, {variables}, {styles}, {time}, or {configuration}
|
||||
args = one or more of the following keywords: {out}, {all}, {system}, {memory}, {communication}, {computes}, {dumps}, {fixes}, {groups}, {regions}, {variables}, {coeffs}, {styles}, {time}, or {configuration}
|
||||
{out} values = {screen}, {log}, {append} filename, {overwrite} filename
|
||||
{styles} values = {all}, {angle}, {atom}, {bond}, {compute}, {command}, {dump}, {dihedral}, {fix}, {improper}, {integrate}, {kspace}, {minimize}, {pair}, {region} :ul
|
||||
|
||||
@ -81,6 +81,11 @@ The {variables} category prints a list of all currently defined
|
||||
variables, their names, styles, definition and last computed value, if
|
||||
available.
|
||||
|
||||
The {coeffs} category prints a list for each defined force style
|
||||
(pair, bond, angle, dihedral, improper) indicating which of the
|
||||
corresponding coefficients have been set. This can be very helpful
|
||||
to debug error messages like "All pair coeffs are not set".
|
||||
|
||||
The {styles} category prints the list of styles available in the
|
||||
current LAMMPS binary. It supports one of the following options
|
||||
to control which category of styles is printed out:
|
||||
|
||||
@ -1,6 +1,5 @@
|
||||
#HTMLDOC 1.8.27
|
||||
-t pdf14 -f "../Manual.pdf" --book --toclevels 4 --no-numbered --toctitle "Table of Contents" --title --textcolor #000000 --linkcolor #0000ff --linkstyle plain --bodycolor #ffffff --size Universal --left 1.00in --right 0.50in --top 0.50in --bottom 0.50in --header .t. --header1 ... --footer ..1 --nup 1 --tocheader .t. --tocfooter ..i --portrait --color --no-pscommands --no-xrxcomments --compression=1 --jpeg=0 --fontsize 11.0 --fontspacing 1.2 --headingfont helvetica --bodyfont times --headfootsize 11.0 --headfootfont helvetica --charset iso-8859-1 --links --embedfonts --pagemode document --pagelayout single --firstpage c1 --pageeffect none --pageduration 10 --effectduration 1.0 --no-encryption --permissions all --owner-password "" --user-password "" --browserwidth 680 --no-strict --no-overflow
|
||||
|
||||
#HTMLDOC 1.8.28
|
||||
-t pdf14 -f "../Manual.pdf" --book --toclevels 4 --no-numbered --toctitle "Table of Contents" --title --textcolor #000000 --linkcolor #0000ff --linkstyle plain --bodycolor #ffffff --size Universal --left 1.00in --right 0.50in --top 0.50in --bottom 0.50in --header .t. --header1 ... --footer ..1 --nup 1 --tocheader .t. --tocfooter ..i --portrait --color --no-pscommands --no-xrxcomments --compression=9 --jpeg=0 --fontsize 11.0 --fontspacing 1.2 --headingfont Sans --bodyfont Serif --headfootsize 11.0 --headfootfont Sans-Bold --charset iso-8859-15 --links --embedfonts --pagemode document --pagelayout single --firstpage c1 --pageeffect none --pageduration 10 --effectduration 1.0 --no-encryption --permissions all --owner-password "" --user-password "" --browserwidth 680 --no-strict --no-overflow
|
||||
Manual.html
|
||||
Section_intro.html
|
||||
Section_start.html
|
||||
@ -62,6 +61,7 @@ dump_modify.html
|
||||
dump_molfile.html
|
||||
dump_netcdf.html
|
||||
dump_vtk.html
|
||||
dump_cfg_uef.html
|
||||
echo.html
|
||||
fix.html
|
||||
fix_modify.html
|
||||
@ -187,6 +187,7 @@ fix_ipi.html
|
||||
fix_langevin.html
|
||||
fix_langevin_drude.html
|
||||
fix_langevin_eff.html
|
||||
fix_latte.html
|
||||
fix_lb_fluid.html
|
||||
fix_lb_momentum.html
|
||||
fix_lb_pc.html
|
||||
@ -231,6 +232,7 @@ fix_nvt_manifold_rattle.html
|
||||
fix_nvt_sllod.html
|
||||
fix_nvt_sllod_eff.html
|
||||
fix_nvt_sphere.html
|
||||
fix_nh_uef.html
|
||||
fix_oneway.html
|
||||
fix_orient.html
|
||||
fix_phonon.html
|
||||
@ -241,7 +243,8 @@ fix_pour.html
|
||||
fix_press_berendsen.html
|
||||
fix_print.html
|
||||
fix_property_atom.html
|
||||
fix_python.html
|
||||
fix_python_invoke.html
|
||||
fix_python_move.html
|
||||
fix_qbmsst.html
|
||||
fix_qeq.html
|
||||
fix_qeq_comb.html
|
||||
@ -253,6 +256,7 @@ fix_reaxc_species.html
|
||||
fix_recenter.html
|
||||
fix_restrain.html
|
||||
fix_rigid.html
|
||||
fix_rhok.html
|
||||
fix_rx.html
|
||||
fix_saed_vtk.html
|
||||
fix_setforce.html
|
||||
@ -354,6 +358,7 @@ compute_pe.html
|
||||
compute_pe_atom.html
|
||||
compute_plasticity_atom.html
|
||||
compute_pressure.html
|
||||
compute_pressure_uef.html
|
||||
compute_property_atom.html
|
||||
compute_property_chunk.html
|
||||
compute_property_local.html
|
||||
@ -403,6 +408,7 @@ compute_temp_region.html
|
||||
compute_temp_region_eff.html
|
||||
compute_temp_rotate.html
|
||||
compute_temp_sphere.html
|
||||
compute_temp_uef.html
|
||||
compute_ti.html
|
||||
compute_torque_chunk.html
|
||||
compute_vacf.html
|
||||
@ -437,6 +443,7 @@ pair_edip.html
|
||||
pair_eff.html
|
||||
pair_eim.html
|
||||
pair_exp6_rx.html
|
||||
pair_extep.html
|
||||
pair_gauss.html
|
||||
pair_gayberne.html
|
||||
pair_gran.html
|
||||
@ -505,6 +512,7 @@ pair_tersoff_mod.html
|
||||
pair_tersoff_zbl.html
|
||||
pair_thole.html
|
||||
pair_tri_lj.html
|
||||
pair_ufm.html
|
||||
pair_vashishta.html
|
||||
pair_yukawa.html
|
||||
pair_yukawa_colloid.html
|
||||
@ -514,7 +522,7 @@ pair_zero.html
|
||||
bond_class2.html
|
||||
bond_fene.html
|
||||
bond_fene_expand.html
|
||||
bond_oxdna.html
|
||||
bond_gromos.html
|
||||
bond_harmonic.html
|
||||
bond_harmonic_shift.html
|
||||
bond_harmonic_shift_cut.html
|
||||
@ -522,6 +530,7 @@ bond_hybrid.html
|
||||
bond_morse.html
|
||||
bond_none.html
|
||||
bond_nonlinear.html
|
||||
bond_oxdna.html
|
||||
bond_quartic.html
|
||||
bond_table.html
|
||||
bond_zero.html
|
||||
|
||||
@ -322,9 +322,9 @@ the fix neb command.
|
||||
The forward (reverse) energy barrier is the potential energy of the
|
||||
highest replica minus the energy of the first (last) replica.
|
||||
|
||||
Supplementary informations for all replicas can be printed out to the
|
||||
screen and master log.lammps file by adding the verbose keyword. These
|
||||
informations include the following. The "path angle" (pathangle) for
|
||||
Supplementary information for all replicas can be printed out to the
|
||||
screen and master log.lammps file by adding the verbose keyword. This
|
||||
information include the following. The "path angle" (pathangle) for
|
||||
the replica i which is the angle between the 3N-length vectors (Ri-1 -
|
||||
Ri) and (Ri+1 - Ri) (where Ri is the atomic coordinates of replica
|
||||
i). A "path angle" of 180 indicates that replicas i-1, i and i+1 are
|
||||
@ -339,8 +339,8 @@ energy gradient of image i. ReplicaForce is the two-norm of the
|
||||
3N-length force vector (including nudging forces) for replica i.
|
||||
MaxAtomForce is the maximum force component of any atom in replica i.
|
||||
|
||||
When a NEB calculation does not converge properly, these suplementary
|
||||
informations can help understanding what is going wrong. For instance
|
||||
When a NEB calculation does not converge properly, the suplementary
|
||||
information can help understanding what is going wrong. For instance
|
||||
when the path angle becomes accute the definition of tangent used in
|
||||
the NEB calculation is questionable and the NEB cannot may diverge
|
||||
"(Maras)"_#Maras2.
|
||||
|
||||
@ -62,7 +62,7 @@ args = arguments specific to the style :l
|
||||
{no_affinity} values = none
|
||||
{kokkos} args = keyword value ...
|
||||
zero or more keyword/value pairs may be appended
|
||||
keywords = {neigh} or {neigh/qeq} or {newton} or {binsize} or {comm} or {comm/exchange} or {comm/forward}
|
||||
keywords = {neigh} or {neigh/qeq} or {newton} or {binsize} or {comm} or {comm/exchange} or {comm/forward} or {comm/reverse}
|
||||
{neigh} value = {full} or {half}
|
||||
full = full neighbor list
|
||||
half = half neighbor list built in thread-safe manner
|
||||
@ -75,9 +75,10 @@ args = arguments specific to the style :l
|
||||
{binsize} value = size
|
||||
size = bin size for neighbor list construction (distance units)
|
||||
{comm} value = {no} or {host} or {device}
|
||||
use value for both comm/exchange and comm/forward
|
||||
use value for comm/exchange and comm/forward and comm/reverse
|
||||
{comm/exchange} value = {no} or {host} or {device}
|
||||
{comm/forward} value = {no} or {host} or {device}
|
||||
{comm/reverse} value = {no} or {host} or {device}
|
||||
no = perform communication pack/unpack in non-KOKKOS mode
|
||||
host = perform pack/unpack on host (e.g. with OpenMP threading)
|
||||
device = perform pack/unpack on device (e.g. on GPU)
|
||||
@ -429,17 +430,18 @@ Coulombic solver"_kspace_style.html because the GPU is faster at
|
||||
performing pairwise interactions, then this rule of thumb may give too
|
||||
large a binsize.
|
||||
|
||||
The {comm} and {comm/exchange} and {comm/forward} keywords determine
|
||||
The {comm} and {comm/exchange} and {comm/forward} and {comm/reverse} keywords determine
|
||||
whether the host or device performs the packing and unpacking of data
|
||||
when communicating per-atom data between processors. "Exchange"
|
||||
communication happens only on timesteps that neighbor lists are
|
||||
rebuilt. The data is only for atoms that migrate to new processors.
|
||||
"Forward" communication happens every timestep. The data is for atom
|
||||
"Forward" communication happens every timestep. "Reverse" communication
|
||||
happens every timestep if the {newton} option is on. The data is for atom
|
||||
coordinates and any other atom properties that needs to be updated for
|
||||
ghost atoms owned by each processor.
|
||||
|
||||
The {comm} keyword is simply a short-cut to set the same value
|
||||
for both the {comm/exchange} and {comm/forward} keywords.
|
||||
for both the {comm/exchange} and {comm/forward} and {comm/reverse} keywords.
|
||||
|
||||
The value options for all 3 keywords are {no} or {host} or {device}.
|
||||
A value of {no} means to use the standard non-KOKKOS method of
|
||||
|
||||
19
doc/src/pair_body_rounded_polygon.txt
Normal file
@ -0,0 +1,19 @@
|
||||
"LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c
|
||||
|
||||
:link(lws,http://lammps.sandia.gov)
|
||||
:link(ld,Manual.html)
|
||||
:link(lc,Section_commands.html#comm)
|
||||
|
||||
:line
|
||||
|
||||
pair_style body/rounded/polygon command :h3
|
||||
|
||||
[Description:]
|
||||
|
||||
Note: This feature is not yet implemented.
|
||||
|
||||
[Related commands:]
|
||||
|
||||
"pair_style body"_pair_body.html
|
||||
|
||||
[Default:] none
|
||||
@ -17,6 +17,7 @@ pair_style born/coul/long/omp command :h3
|
||||
pair_style born/coul/msm command :h3
|
||||
pair_style born/coul/msm/omp command :h3
|
||||
pair_style born/coul/wolf command :h3
|
||||
pair_style born/coul/wolf/cs command :h3
|
||||
pair_style born/coul/wolf/gpu command :h3
|
||||
pair_style born/coul/wolf/omp command :h3
|
||||
pair_style born/coul/dsf command :h3
|
||||
@ -36,7 +37,7 @@ args = list of arguments for a particular style :ul
|
||||
{born/coul/msm} args = cutoff (cutoff2)
|
||||
cutoff = global cutoff for non-Coulombic (and Coulombic if only 1 arg) (distance units)
|
||||
cutoff2 = global cutoff for Coulombic (optional) (distance units)
|
||||
{born/coul/wolf} args = alpha cutoff (cutoff2)
|
||||
{born/coul/wolf} or {born/coul/wolf/cs} args = alpha cutoff (cutoff2)
|
||||
alpha = damping parameter (inverse distance units)
|
||||
cutoff = global cutoff for non-Coulombic (and Coulombic if only 1 arg) (distance units)
|
||||
cutoff2 = global cutoff for Coulombic (optional) (distance units)
|
||||
@ -65,6 +66,7 @@ pair_coeff 1 1 6.08 0.317 2.340 24.18 11.51 :pre
|
||||
|
||||
pair_style born/coul/wolf 0.25 10.0
|
||||
pair_style born/coul/wolf 0.25 10.0 9.0
|
||||
pair_style born/coul/wolf/cs 0.25 10.0 9.0
|
||||
pair_coeff * * 6.08 0.317 2.340 24.18 11.51
|
||||
pair_coeff 1 1 6.08 0.317 2.340 24.18 11.51 :pre
|
||||
|
||||
@ -106,8 +108,9 @@ damped shifted force model as in the "coul/dsf"_pair_coul.html style.
|
||||
Style {born/coul/long/cs} is identical to {born/coul/long} except that
|
||||
a term is added for the "core/shell model"_Section_howto.html#howto_25
|
||||
to allow charges on core and shell particles to be separated by r =
|
||||
0.0. The same correction is introduced for {born/coul/dsf/cs} style
|
||||
which is identical to {born/coul/dsf}.
|
||||
0.0. The same correction is introduced for the {born/coul/dsf/cs}
|
||||
style which is identical to {born/coul/dsf}. And likewise for
|
||||
{born/coul/wolf/cs} style which is identical to {born/coul/wolf}.
|
||||
|
||||
Note that these potentials are related to the "Buckingham
|
||||
potential"_pair_buck.html.
|
||||
|
||||
138
doc/src/pair_buck6d_coul_gauss.txt
Normal file
@ -0,0 +1,138 @@
|
||||
"LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c
|
||||
|
||||
:link(lws,http://lammps.sandia.gov)
|
||||
:link(ld,Manual.html)
|
||||
:link(lc,Section_commands.html#comm)
|
||||
|
||||
:line
|
||||
|
||||
pair_style buck6d/coul/gauss/dsf :h3
|
||||
pair_style buck6d/coul/gauss/long :h3
|
||||
|
||||
[Syntax:]
|
||||
|
||||
pair_style style args :pre
|
||||
|
||||
style = {buck6d/coul/gauss/dsf} or {buck6d/coul/gauss/long}
|
||||
args = list of arguments for a particular style :ul
|
||||
{buck6d/coul/gauss/dsf} args = smooth cutoff (cutoff2)
|
||||
smooth = smoothing onset within Buckingham cutoff (ratio)
|
||||
cutoff = global cutoff for Buckingham (and Coulombic if only 1 arg) (distance units)
|
||||
cutoff2 = global cutoff for Coulombic (optional) (distance units)
|
||||
{buck6d/coul/gauss/long} args = smooth smooth2 cutoff (cutoff2)
|
||||
smooth = smoothing onset within Buckingham cutoff (ratio)
|
||||
smooth2 = smoothing onset within Coulombic cutoff (ratio)
|
||||
cutoff = global cutoff for Buckingham (and Coulombic if only 1 arg) (distance units)
|
||||
cutoff2 = global cutoff for Coulombic (optional) (distance units) :pre
|
||||
|
||||
[Examples:]
|
||||
|
||||
pair_style buck6d/coul/gauss/dsf 0.9000 12.0000
|
||||
pair_coeff 1 1 1030. 3.061 457.179 4.521 0.608 :pre
|
||||
|
||||
pair_style buck6d/coul/gauss/long 0.9000 1.0000 12.0000
|
||||
pair_coeff 1 1 1030. 3.061 457.179 4.521 0.608 :pre
|
||||
|
||||
[Description:]
|
||||
|
||||
The {buck6d/coul/gauss} styles evaluate vdW and Coulomb
|
||||
interactions following the MOF-FF force field after
|
||||
"(Schmid)"_#Schmid. The vdW term of the {buck6d} styles
|
||||
computes a dispersion damped Buckingham potential:
|
||||
|
||||
:c,image(Eqs/pair_buck6d.jpg)
|
||||
|
||||
where A and C are a force constant, kappa is an ionic-pair dependent
|
||||
reciprocal length parameter, D is a dispersion correction parameter,
|
||||
and the cutoff Rc truncates the interaction distance.
|
||||
The first term in the potential corresponds to the Buckingham
|
||||
repulsion term and the second term to the dispersion attraction with
|
||||
a damping correction analog to the Grimme correction used in DFT.
|
||||
The latter corrects for artifacts occurring at short distances which
|
||||
become an issue for soft vdW potentials.
|
||||
|
||||
The {buck6d} styles include a smoothing function which is invoked
|
||||
according to the global smooting parameter within the specified
|
||||
cutoff. Hereby a parameter of i.e. 0.9 invokes the smoothing
|
||||
within 90% of the cutoff. No smoothing is applied at a value
|
||||
of 1.0. For the {gauss/dsf} style this smoothing is only applicable
|
||||
for the dispersion damped Buckingham potential. For the {gauss/long}
|
||||
styles the smoothing function can also be invoked for the real
|
||||
space coulomb interactions which enforce continous energies and
|
||||
forces at the cutoff.
|
||||
|
||||
Both styles {buck6d/coul/gauss/dsf} and {buck6d/coul/gauss/long}
|
||||
evaluate a Coulomb potential using spherical Gaussian type charge
|
||||
distributions which effectively dampen electrostatic ineractions
|
||||
for high charges at close distances. The electrostatic potential
|
||||
is thus evaluated as:
|
||||
|
||||
:c,image(Eqs/pair_coul_gauss.jpg)
|
||||
|
||||
where C is an energy-conversion constant, Qi and Qj are the
|
||||
charges on the 2 atoms, epsilon is the dielectric constant which
|
||||
can be set by the "dielectric"_dielectric.html command, alpha is
|
||||
ion pair dependent damping parameter and erf() is the error-function.
|
||||
The cutoff Rc truncates the interaction distance.
|
||||
|
||||
The style {buck6d/coul/gauss/dsf} computes the Coulomb interaction
|
||||
via the damped shifted force model described in "(Fennell)"_#Fennell
|
||||
approximating an Ewald sum similar to the "pair coul/dsf"_pair_coul.html
|
||||
styles. In {buck6d/coul/gauss/long} an additional damping factor is
|
||||
applied to the Coulombic term so it can be used in conjunction with the
|
||||
"kspace_style"_kspace_style.html command and its {ewald} or {pppm}
|
||||
options. The Coulombic cutoff in this case separates the real and
|
||||
reciprocal space evaluation of the Ewald sum.
|
||||
|
||||
If one cutoff is specified it is used for both the vdW and Coulomb
|
||||
terms. If two cutoffs are specified, the first is used as the cutoff
|
||||
for the vdW terms, and the second is the cutoff for the Coulombic term.
|
||||
|
||||
The following coefficients must be defined for each pair of atoms
|
||||
types via the "pair_coeff"_pair_coeff.html command as in the examples
|
||||
above, or in the data file or restart files read by the
|
||||
"read_data"_read_data.html or "read_restart"_read_restart.html
|
||||
commands:
|
||||
|
||||
A (energy units)
|
||||
rho (distance^-1 units)
|
||||
C (energy-distance^6 units)
|
||||
D (distance^14 units)
|
||||
alpha (distance^-1 units)
|
||||
cutoff (distance units) :ul
|
||||
|
||||
The second coefficient, rho, must be greater than zero. The latter
|
||||
coefficient is optional. If not specified, the global vdW cutoff
|
||||
is used.
|
||||
|
||||
:line
|
||||
|
||||
[Mixing, shift, table, tail correction, restart, rRESPA info]:
|
||||
|
||||
These pair styles do not support mixing. Thus, coefficients for all
|
||||
I,J pairs must be specified explicitly.
|
||||
|
||||
These styles do not support the "pair_modify"_pair_modify.html shift
|
||||
option for the energy. Instead the smoothing function should be applied
|
||||
by setting the global smoothing parameter to a value < 1.0.
|
||||
|
||||
These styles write their information to "binary restart
|
||||
files"_restart.html, so pair_style and pair_coeff commands do not need
|
||||
to be specified in an input script that reads a restart file.
|
||||
|
||||
[Restrictions:]
|
||||
|
||||
These styles are part of the USER-MOFFF package. They are only enabled
|
||||
if LAMMPS was built with that package. See the
|
||||
"Making LAMMPS"_Section_start.html#start_3 section for more info.
|
||||
|
||||
[Related commands:]
|
||||
|
||||
"pair_coeff"_pair_coeff.html
|
||||
|
||||
[Default:] none
|
||||
|
||||
:link(Schmid)
|
||||
[(Schmid)] S. Bureekaew, S. Amirjalayer, M. Tafipolsky, C. Spickermann, T.K. Roy and R. Schmid, Phys. Status Solidi B, 6, 1128 (2013).
|
||||
:link(Fennell)
|
||||
[(Fennell)] C. J. Fennell, J. D. Gezelter, J Chem Phys, 124, 234104 (2006).
|
||||
@ -29,6 +29,7 @@ pair_style coul/streitz command :h3
|
||||
pair_style coul/wolf command :h3
|
||||
pair_style coul/wolf/kk command :h3
|
||||
pair_style coul/wolf/omp command :h3
|
||||
pair_style coul/wolf/cs command :h3
|
||||
pair_style tip4p/cut command :h3
|
||||
pair_style tip4p/long command :h3
|
||||
pair_style tip4p/cut/omp command :h3
|
||||
@ -43,6 +44,7 @@ pair_style coul/long cutoff
|
||||
pair_style coul/long/cs cutoff
|
||||
pair_style coul/long/gpu cutoff
|
||||
pair_style coul/wolf alpha cutoff
|
||||
pair_style coul/wolf/cs alpha cutoff
|
||||
pair_style coul/streitz cutoff keyword alpha
|
||||
pair_style tip4p/cut otype htype btype atype qdist cutoff
|
||||
pair_style tip4p/long otype htype btype atype qdist cutoff :pre
|
||||
@ -72,6 +74,7 @@ pair_style coul/msm 10.0
|
||||
pair_coeff * * :pre
|
||||
|
||||
pair_style coul/wolf 0.2 9.0
|
||||
pair_style coul/wolf/cs 0.2 9.0
|
||||
pair_coeff * * :pre
|
||||
|
||||
pair_style coul/streitz 12.0 ewald
|
||||
@ -202,7 +205,9 @@ interactions outside that distance are computed in reciprocal space.
|
||||
|
||||
Style {coul/long/cs} is identical to {coul/long} except that a term is
|
||||
added for the "core/shell model"_Section_howto.html#howto_25 to allow
|
||||
charges on core and shell particles to be separated by r = 0.0.
|
||||
charges on core and shell particles to be separated by r = 0.0. The
|
||||
same correction is introduced for the {coul/wolf/cs} style which is
|
||||
identical to {coul/wolf}.
|
||||
|
||||
Styles {tip4p/cut} and {tip4p/long} implement the coulomb part of
|
||||
the TIP4P water model of "(Jorgensen)"_#Jorgensen3, which introduces
|
||||
|
||||
@ -9,12 +9,13 @@
|
||||
pair_style born/coul/long/cs command :h3
|
||||
pair_style buck/coul/long/cs command :h3
|
||||
pair_style born/coul/dsf/cs command :h3
|
||||
pair_style born/coul/wolf/cs command :h3
|
||||
|
||||
[Syntax:]
|
||||
|
||||
pair_style style args :pre
|
||||
|
||||
style = {born/coul/long/cs} or {buck/coul/long/cs} or {born/coul/dsf/cs}
|
||||
style = {born/coul/long/cs} or {buck/coul/long/cs} or {born/coul/dsf/cs} or {born/coul/wolf/cs}
|
||||
args = list of arguments for a particular style :ul
|
||||
{born/coul/long/cs} args = cutoff (cutoff2)
|
||||
cutoff = global cutoff for non-Coulombic (and Coulombic if only 1 arg) (distance units)
|
||||
@ -26,6 +27,10 @@ args = list of arguments for a particular style :ul
|
||||
alpha = damping parameter (inverse distance units)
|
||||
cutoff = global cutoff for non-Coulombic (and Coulombic if only 1 arg) (distance units)
|
||||
cutoff2 = global cutoff for Coulombic (distance units) :pre
|
||||
{born/coul/wolf/cs} args = alpha cutoff (cutoff2)
|
||||
alpha = damping parameter (inverse distance units)
|
||||
cutoff = global cutoff for Buckingham (and Coulombic if only 1 arg) (distance units)
|
||||
cutoff2 = global cutoff for Coulombic (optional) (distance units)
|
||||
|
||||
[Examples:]
|
||||
|
||||
@ -41,6 +46,10 @@ pair_style born/coul/dsf/cs 0.1 10.0 12.0
|
||||
pair_coeff * * 0.0 1.00 0.00 0.00 0.00
|
||||
pair_coeff 1 1 480.0 0.25 0.00 1.05 0.50 :pre
|
||||
|
||||
pair_style born/coul/wolf/cs 0.25 10.0 12.0
|
||||
pair_coeff * * 0.0 1.00 0.00 0.00 0.00
|
||||
pair_coeff 1 1 480.0 0.25 0.00 1.05 0.50 :pre
|
||||
|
||||
[Description:]
|
||||
|
||||
These pair styles are designed to be used with the adiabatic
|
||||
@ -73,13 +82,21 @@ the core and shell, epsilon is the dielectric constant and r_min is the
|
||||
minimal distance.
|
||||
|
||||
The pair style {born/coul/dsf/cs} is identical to the
|
||||
"pair_style born/coul/dsf"_pair_born.html style, which uses the
|
||||
"pair_style born/coul/dsf"_pair_born.html style, which uses
|
||||
the damped shifted force model as in "coul/dsf"_pair_coul.html
|
||||
to compute the Coulomb contribution. This approach does not require
|
||||
a long-range solver, thus the only correction is the addition of a
|
||||
minimal distance to avoid the possible r = 0.0 case for a
|
||||
core/shell pair.
|
||||
|
||||
The pair style {born/coul/wolf/cs} is identical to the
|
||||
"pair_style born/coul/wolf"_pair_born.html style, which uses
|
||||
the Wolf summation as in "coul/wolf"_pair_coul.html to compute
|
||||
the Coulomb contribution. This approach does not require
|
||||
a long-range solver, thus the only correction is the addition of a
|
||||
minimal distance to avoid the possible r = 0.0 case for a
|
||||
core/shell pair.
|
||||
|
||||
[Restrictions:]
|
||||
|
||||
These pair styles are part of the CORESHELL package. They are only
|
||||
|
||||
@ -8,6 +8,7 @@
|
||||
|
||||
pair_style dpd command :h3
|
||||
pair_style dpd/gpu command :h3
|
||||
pair_style dpd/intel command :h3
|
||||
pair_style dpd/omp command :h3
|
||||
pair_style dpd/tstat command :h3
|
||||
pair_style dpd/tstat/gpu command :h3
|
||||
|
||||
@ -294,7 +294,7 @@ distribution have a ".cdeam" suffix.
|
||||
|
||||
Style {eam/fs} computes pairwise interactions for metals and metal
|
||||
alloys using a generalized form of EAM potentials due to Finnis and
|
||||
Sinclair "(Finnis)"_#Finnis. The total energy Ei of an atom I is
|
||||
Sinclair "(Finnis)"_#Finnis1. The total energy Ei of an atom I is
|
||||
given by
|
||||
|
||||
:c,image(Eqs/pair_eam_fs.jpg)
|
||||
@ -442,7 +442,7 @@ of Physics: Condensed Matter, 16, S2629 (2004).
|
||||
[(Daw)] Daw, Baskes, Phys Rev Lett, 50, 1285 (1983).
|
||||
Daw, Baskes, Phys Rev B, 29, 6443 (1984).
|
||||
|
||||
:link(Finnis)
|
||||
:link(Finnis1)
|
||||
[(Finnis)] Finnis, Sinclair, Philosophical Magazine A, 50, 45 (1984).
|
||||
|
||||
:link(Stukowski)
|
||||
|
||||
40
doc/src/pair_extep.txt
Normal file
@ -0,0 +1,40 @@
|
||||
"LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c
|
||||
|
||||
:link(lws,http://lammps.sandia.gov)
|
||||
:link(ld,Manual.html)
|
||||
:link(lc,Section_commands.html#comm)
|
||||
|
||||
:line
|
||||
|
||||
pair_style extep command :h3
|
||||
|
||||
[Syntax:]
|
||||
|
||||
pair_style extep :pre
|
||||
|
||||
[Examples:]
|
||||
|
||||
pair_style extep
|
||||
pair_coeff * * BN.extep B N :pre
|
||||
|
||||
[Description:]
|
||||
|
||||
Style {extep} computes the Extended Tersoff Potential (ExTeP)
|
||||
interactions as described in "(Los2017)"_#Los2017.
|
||||
|
||||
:line
|
||||
|
||||
[Restrictions:] none
|
||||
|
||||
[Related commands:]
|
||||
|
||||
"pair_tersoff" pair_tersoff.html
|
||||
|
||||
[Default:] none
|
||||
|
||||
:line
|
||||
|
||||
:link(Los2017)
|
||||
[(Los2017)] J. H. Los et al. "Extended Tersoff potential for boron nitride:
|
||||
Energetics and elastic properties of pristine and defective h-BN",
|
||||
Phys. Rev. B 96 (184108), 2017.
|
||||
@ -12,8 +12,8 @@ pair_style smd/ulsph command :h3
|
||||
|
||||
pair_style smd/ulsph args :pre
|
||||
|
||||
these keywords must be given :l
|
||||
keyword = {*DENSITY_SUMMATION} or {*DENSITY_CONTINUITY} and {*VELOCITY_GRADIENT} or {*NO_VELOCITY_GRADIENT} and {*GRADIENT_CORRECTION} or {*NO_GRADIENT_CORRECTION}
|
||||
these keywords must be given :ul
|
||||
keyword = {*DENSITY_SUMMATION} or {*DENSITY_CONTINUITY} and {*VELOCITY_GRADIENT} or {*NO_VELOCITY_GRADIENT} and {*GRADIENT_CORRECTION} or {*NO_GRADIENT_CORRECTION} :pre
|
||||
|
||||
[Examples:]
|
||||
|
||||
|
||||
@ -7,6 +7,7 @@
|
||||
:line
|
||||
|
||||
pair_style snap command :h3
|
||||
pair_style snap/kk command :h3
|
||||
|
||||
[Syntax:]
|
||||
|
||||
@ -171,6 +172,29 @@ This pair style can only be used via the {pair} keyword of the
|
||||
|
||||
:line
|
||||
|
||||
Styles with a {gpu}, {intel}, {kk}, {omp}, or {opt} suffix are
|
||||
functionally the same as the corresponding style without the suffix.
|
||||
They have been optimized to run faster, depending on your available
|
||||
hardware, as discussed in "Section 5"_Section_accelerate.html
|
||||
of the manual. The accelerated styles take the same arguments and
|
||||
should produce the same results, except for round-off and precision
|
||||
issues.
|
||||
|
||||
These accelerated styles are part of the GPU, USER-INTEL, KOKKOS,
|
||||
USER-OMP and OPT packages, respectively. They are only enabled if
|
||||
LAMMPS was built with those packages. See the "Making
|
||||
LAMMPS"_Section_start.html#start_3 section for more info.
|
||||
|
||||
You can specify the accelerated styles explicitly in your input script
|
||||
by including their suffix, or you can use the "-suffix command-line
|
||||
switch"_Section_start.html#start_6 when you invoke LAMMPS, or you can
|
||||
use the "suffix"_suffix.html command in your input script.
|
||||
|
||||
See "Section 5"_Section_accelerate.html of the manual for
|
||||
more instructions on how to use the accelerated styles effectively.
|
||||
|
||||
:line
|
||||
|
||||
[Restrictions:]
|
||||
|
||||
This style is part of the SNAP package. It is only enabled if
|
||||
|
||||
135
doc/src/pair_ufm.txt
Normal file
@ -0,0 +1,135 @@
|
||||
"LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c
|
||||
|
||||
:link(lws,http://lammps.sandia.gov)
|
||||
:link(ld,Manual.html)
|
||||
:link(lc,Section_commands.html#comm)
|
||||
|
||||
:line
|
||||
|
||||
pair_style ufm command :h3
|
||||
pair_style ufm/gpu command :h3
|
||||
pair_style ufm/omp command :h3
|
||||
pair_style ufm/opt command :h3
|
||||
|
||||
[Syntax:]
|
||||
|
||||
pair_style ufm cutoff :pre
|
||||
|
||||
cutoff = global cutoff for {ufm} interactions (distance units) :ul
|
||||
|
||||
[Examples:]
|
||||
|
||||
pair_style ufm 4.0
|
||||
pair_coeff 1 1 100.0 1.0 2.5
|
||||
pair_coeff * * 100.0 1.0 :pre
|
||||
|
||||
|
||||
pair_style ufm 4.0
|
||||
pair_coeff * * 10.0 1.0
|
||||
variable prefactor equal ramp(10,100)
|
||||
fix 1 all adapt 1 pair ufm epsilon * * v_prefactor :pre
|
||||
|
||||
[Description:]
|
||||
|
||||
Style {ufm} computes pairwise interactions using the Uhlenbeck-Ford model (UFM) potential "(Paula Leite2016)"_#PL2 which is given by
|
||||
|
||||
:c,image(Eqs/pair_ufm.jpg)
|
||||
|
||||
where rc is the cutoff, sigma is a distance-scale and epsilon is an energy-scale, i.e., a product of Boltzmann constant kB, temperature T and the Uhlenbeck-Ford p-parameter which is responsible
|
||||
to control the softness of the interactions "(Paula Leite2017)"_#PL1.
|
||||
This model is useful as a reference system for fluid-phase free-energy calculations "(Paula Leite2016)"_#PL2.
|
||||
|
||||
The following coefficients must be defined for each pair of atom types
|
||||
via the "pair_coeff"_pair_coeff.html command as in the examples above,
|
||||
or in the data file or restart files read by the
|
||||
"read_data"_read_data.html or "read_restart"_read_restart.html
|
||||
commands, or by mixing as described below:
|
||||
|
||||
epsilon (energy units)
|
||||
sigma (distance units)
|
||||
cutoff (distance units) :ul
|
||||
|
||||
The last coefficient is optional. If not specified, the global {ufm}
|
||||
cutoff is used.
|
||||
|
||||
|
||||
The "fix adapt"_fix_adapt.html command can be used to vary epsilon and sigma for this pair style over the course of a simulation, in which case
|
||||
pair_coeff settings for epsilon and sigma must still be specified, but will be
|
||||
overridden. For example these commands will vary the prefactor epsilon for
|
||||
all pairwise interactions from 10.0 at the beginning to 100.0 at the end
|
||||
of a run:
|
||||
|
||||
variable prefactor equal ramp(10,100)
|
||||
fix 1 all adapt 1 pair ufm epsilon * * v_prefactor :pre
|
||||
|
||||
NOTE: The thermodynamic integration procedure can be performed with this potential using "fix adapt"_fix_adapt.html. This command will rescale the force on each atom by varying a scale variable, which always starts with value 1.0. The syntax is the same described above, however, changing epsilon to scale. A detailed explanation of how to use this command and perform nonequilibrium thermodynamic integration in LAMMPS is given in the paper by "(Freitas)"_#Freitas2.
|
||||
|
||||
:line
|
||||
|
||||
Styles with a {gpu}, {intel}, {kk}, {omp}, or {opt} suffix are
|
||||
functionally the same as the corresponding style without the suffix.
|
||||
They have been optimized to run faster, depending on your available
|
||||
hardware, as discussed in "Section 5"_Section_accelerate.html
|
||||
of the manual. The accelerated styles take the same arguments and
|
||||
should produce the same results, except for round-off and precision
|
||||
issues.
|
||||
|
||||
These accelerated styles are part of the GPU, USER-INTEL, KOKKOS,
|
||||
USER-OMP and OPT packages, respectively. They are only enabled if
|
||||
LAMMPS was built with those packages. See the "Making
|
||||
LAMMPS"_Section_start.html#start_3 section for more info.
|
||||
|
||||
You can specify the accelerated styles explicitly in your input script
|
||||
by including their suffix, or you can use the "-suffix command-line
|
||||
switch"_Section_start.html#start_6 when you invoke LAMMPS, or you can
|
||||
use the "suffix"_suffix.html command in your input script.
|
||||
|
||||
See "Section 5"_Section_accelerate.html of the manual for
|
||||
more instructions on how to use the accelerated styles effectively.
|
||||
|
||||
:line
|
||||
|
||||
[Mixing, shift, table, tail correction, restart, rRESPA info]:
|
||||
|
||||
For atom type pairs I,J and I != J, the A coefficient and cutoff
|
||||
distance for this pair style can be mixed. A is always mixed via a
|
||||
{geometric} rule. The cutoff is mixed according to the pair_modify
|
||||
mix value. The default mix value is {geometric}. See the
|
||||
"pair_modify" command for details.
|
||||
|
||||
This pair style support the "pair_modify"_pair_modify.html shift option for the energy of the pair interaction.
|
||||
|
||||
The "pair_modify"_pair_modify.html table and tail are not relevant for this
|
||||
pair style.
|
||||
|
||||
This pair style does not support the "pair_modify"_pair_modify.html tail option for adding long-range tail corrections to energy and pressure.
|
||||
|
||||
This pair style writes its information to "binary restart
|
||||
files"_restart.html, so pair_style and pair_coeff commands do not need
|
||||
to be specified in an input script that reads a restart file.
|
||||
|
||||
This pair style can only be used via the {pair} keyword of the
|
||||
"run_style respa"_run_style.html command. It does not support the
|
||||
{inner}, {middle}, {outer} keywords.
|
||||
|
||||
:line
|
||||
|
||||
[Restrictions:] none
|
||||
|
||||
[Related commands:]
|
||||
|
||||
"pair_coeff"_pair_coeff.html, "fix adapt"_fix_adapt.html
|
||||
|
||||
[Default:] none
|
||||
|
||||
|
||||
:link(PL1)
|
||||
[(Paula Leite2017)] Paula Leite, Santos-Florez, and de Koning, Phys Rev E, 96,
|
||||
32115 (2017).
|
||||
|
||||
:link(PL2)
|
||||
[(Paula Leite2016)] Paula Leite , Freitas, Azevedo, and de Koning, J Chem Phys, 126,
|
||||
044509 (2016).
|
||||
|
||||
:link(Freitas2)
|
||||
[(Freitas)] Freitas, Asta, and de Koning, Computational Materials Science, 112, 333 (2016).
|
||||
@ -9,6 +9,7 @@
|
||||
pair_style yukawa command :h3
|
||||
pair_style yukawa/gpu command :h3
|
||||
pair_style yukawa/omp command :h3
|
||||
pair_style yukawa/kk command :h3
|
||||
|
||||
[Syntax:]
|
||||
|
||||
|
||||
@ -8,6 +8,7 @@
|
||||
|
||||
pair_style zbl command :h3
|
||||
pair_style zbl/gpu command :h3
|
||||
pair_style zbl/kk command :h3
|
||||
pair_style zbl/omp command :h3
|
||||
|
||||
[Syntax:]
|
||||
|
||||
@ -11,11 +11,13 @@ Pair Styles :h1
|
||||
pair_awpmd
|
||||
pair_beck
|
||||
pair_body
|
||||
pair_body_rounded_polygon
|
||||
pair_bop
|
||||
pair_born
|
||||
pair_brownian
|
||||
pair_buck
|
||||
pair_buck_long
|
||||
pair_buck6d_coul_gauss
|
||||
pair_charmm
|
||||
pair_class2
|
||||
pair_colloid
|
||||
@ -32,6 +34,7 @@ Pair Styles :h1
|
||||
pair_eff
|
||||
pair_eim
|
||||
pair_exp6_rx
|
||||
pair_extep
|
||||
pair_gauss
|
||||
pair_gayberne
|
||||
pair_gran
|
||||
@ -100,6 +103,7 @@ Pair Styles :h1
|
||||
pair_tersoff_zbl
|
||||
pair_thole
|
||||
pair_tri_lj
|
||||
pair_ufm
|
||||
pair_vashishta
|
||||
pair_yukawa
|
||||
pair_yukawa_colloid
|
||||
|
||||
@ -14,10 +14,11 @@ print string keyword value :pre
|
||||
|
||||
string = text string to print, which may contain variables :ulb,l
|
||||
zero or more keyword/value pairs may be appended :l
|
||||
keyword = {file} or {append} or {screen} :l
|
||||
keyword = {file} or {append} or {screen} or {universe} :l
|
||||
{file} value = filename
|
||||
{append} value = filename
|
||||
{screen} value = {yes} or {no} :pre
|
||||
{screen} value = {yes} or {no}
|
||||
{universe} value = {yes} or {no} :pre
|
||||
:ule
|
||||
|
||||
[Examples:]
|
||||
@ -26,6 +27,7 @@ print "Done with equilibration" file info.dat
|
||||
print Vol=$v append info.dat screen no
|
||||
print "The system volume is now $v"
|
||||
print 'The system volume is now $v'
|
||||
print "NEB calculation 1 complete" screen no universe yes
|
||||
print """
|
||||
System volume = $v
|
||||
System temperature = $t
|
||||
@ -49,6 +51,11 @@ it does not exist.
|
||||
If the {screen} keyword is used, output to the screen and logfile can
|
||||
be turned on or off as desired.
|
||||
|
||||
If the {universe} keyword is used, output to the global screen and
|
||||
logfile can be turned on or off as desired. In multi-partition
|
||||
calculations, the {screen} option and the corresponding output only
|
||||
apply to the screen and logfile of the individual partition.
|
||||
|
||||
If you want the print command to be executed multiple times (with
|
||||
changing variable values), there are 3 options. First, consider using
|
||||
the "fix print"_fix_print.html command, which will print a string
|
||||
@ -74,4 +81,4 @@ thermodynamic properties, global values calculated by a
|
||||
|
||||
[Default:]
|
||||
|
||||
The option defaults are no file output and screen = yes.
|
||||
The option defaults are no file output, screen = yes, and universe = no.
|
||||
|
||||
@ -406,7 +406,7 @@ cases, LAMMPS has no simple way to check that something illogical is
|
||||
being attempted.
|
||||
|
||||
The same applies to Python functions called during a simulation run at
|
||||
each time step using "fix python"_fix_python.html.
|
||||
each time step using "fix python/invoke"_fix_python_invoke.html.
|
||||
|
||||
:line
|
||||
|
||||
@ -493,6 +493,6 @@ different source files, problems may occur.
|
||||
|
||||
[Related commands:]
|
||||
|
||||
"shell"_shell.html, "variable"_variable.html, "fix python"_fix_python.html
|
||||
"shell"_shell.html, "variable"_variable.html, "fix python/invoke"_fix_python_invoke.html
|
||||
|
||||
[Default:] none
|
||||
|
||||
@ -10,9 +10,11 @@ replicate command :h3
|
||||
|
||||
[Syntax:]
|
||||
|
||||
replicate nx ny nz :pre
|
||||
replicate nx ny nz {keyword} :pre
|
||||
|
||||
nx,ny,nz = replication factors in each dimension :ul
|
||||
nx,ny,nz = replication factors in each dimension :ulb
|
||||
optional {keyword} = {bbox} :l
|
||||
{bbox} = only check atoms in replicas that overlap with a processor's subdomain :ule
|
||||
|
||||
[Examples:]
|
||||
|
||||
@ -43,6 +45,12 @@ file that crosses a periodic boundary should be between two atoms with
|
||||
image flags that differ by 1. This will allow the bond to be
|
||||
unwrapped appropriately.
|
||||
|
||||
The optional keyword {bbox} uses a bounding box to only check atoms
|
||||
in replicas that overlap with a processor's subdomain when assigning
|
||||
atoms to processors, and thus can result in substantial speedups for
|
||||
calculations using a large number of processors. It does require
|
||||
temporarily using more memory.
|
||||
|
||||
[Restrictions:]
|
||||
|
||||
A 2d simulation cannot be replicated in the z dimension.
|
||||
|
||||
@ -67,7 +67,8 @@ class RSTMarkup(Markup):
|
||||
text = text.replace('*', '\\*')
|
||||
text = text.replace('^', '\\^')
|
||||
text = text.replace('|', '\\|')
|
||||
text = re.sub(r'([^"])_', r'\1\\_', text)
|
||||
text = re.sub(r'([^"])_([ \t\n\r\f])', r'\1\\\\_\2', text)
|
||||
text = re.sub(r'([^"])_([^ \t\n\r\f])', r'\1\\_\2', text)
|
||||
return text
|
||||
|
||||
def unescape_rst_chars(self, text):
|
||||
@ -148,12 +149,15 @@ class RSTFormatting(Formatting):
|
||||
return "\n----------\n\n" + content.strip()
|
||||
|
||||
def image(self, content, file, link=None):
|
||||
if link and (link.lower().endswith('.jpg') or
|
||||
link.lower().endswith('.jpeg') or
|
||||
link.lower().endswith('.png') or
|
||||
link.lower().endswith('.gif')):
|
||||
converted = ".. thumbnail:: " + self.markup.unescape_rst_chars(link) + "\n"
|
||||
else:
|
||||
# 2017-12-07: commented out to disable thumbnail processing due to dropping
|
||||
# support for obsolete sphinxcontrib.images extension
|
||||
#
|
||||
#if link and (link.lower().endswith('.jpg') or
|
||||
# link.lower().endswith('.jpeg') or
|
||||
# link.lower().endswith('.png') or
|
||||
# link.lower().endswith('.gif')):
|
||||
# converted = ".. thumbnail:: " + self.markup.unescape_rst_chars(link) + "\n"
|
||||
#else:
|
||||
converted = ".. image:: " + self.markup.unescape_rst_chars(file) + "\n"
|
||||
if link:
|
||||
converted += " :target: " + self.markup.unescape_rst_chars(link) + "\n"
|
||||
|
||||
@ -31,8 +31,11 @@ import os
|
||||
# ones.
|
||||
extensions = [
|
||||
'sphinx.ext.mathjax',
|
||||
'sphinxcontrib.images',
|
||||
]
|
||||
# 2017-12-07: commented out, since this package is broken with Sphinx 16.x
|
||||
# yet we can no longer use Sphinx 15.x, since that breaks with
|
||||
# newer version of the multiprocessor module.
|
||||
# 'sphinxcontrib.images',
|
||||
|
||||
images_config = {
|
||||
'default_image_width' : '25%',
|
||||
|
||||
@ -17,33 +17,36 @@ additional wrapper library that interfaces the C interface of the
|
||||
LAMMPS library to Fortran and also translates the MPI communicator
|
||||
from Fortran to C.
|
||||
|
||||
Once you have built LAMMPS as a library (see examples/COUPLE/README),
|
||||
you can then build any of the driver codes with compile lines like
|
||||
these, which include paths to the LAMMPS library interface, MPI (an
|
||||
installed MPICH in this case), and FFTW (assuming you built LAMMPS as
|
||||
a library with its PPPM solver).
|
||||
First build LAMMPS as a library (see examples/COUPLE/README), e.g.
|
||||
|
||||
This builds the C++ driver with the LAMMPS library using a C++ compiler:
|
||||
make mode=shlib mpi
|
||||
|
||||
g++ -I/home/sjplimp/lammps/src -c simple.cpp
|
||||
g++ -L/home/sjplimp/lammps/src simple.o \
|
||||
-llammps -lfftw -lmpich -lmpl -lpthread -o simpleCC
|
||||
You can then build any of the driver codes with compile lines like
|
||||
these, which include paths to the LAMMPS library interface, and
|
||||
linking with FFTW (only needed if you built LAMMPS as a library with
|
||||
its PPPM solver).
|
||||
|
||||
This builds the C driver with the LAMMPS library using a C compiler:
|
||||
This builds the C++ driver with the LAMMPS library using the mpiCC
|
||||
(C++) compiler:
|
||||
|
||||
gcc -I/home/sjplimp/lammps/src -c simple.c
|
||||
gcc -L/home/sjplimp/lammps/src simple.o \
|
||||
-llammps -lfftw -lmpich -lmpl -lpthread -lstdc++ -o simpleC
|
||||
mpiCC -I/home/sjplimp/lammps/src -c simple.cpp
|
||||
mpiCC -L/home/sjplimp/lammps/src simple.o -llammps -lfftw -o simpleCC
|
||||
|
||||
This builds the C driver with the LAMMPS library using the mpicc (C)
|
||||
compiler:
|
||||
|
||||
mpicc -I/home/sjplimp/lammps/src -c simple.c
|
||||
mpicc -L/home/sjplimp/lammps/src simple.o -llammps -lfftw -o simpleC
|
||||
|
||||
This builds the Fortran wrapper and driver with the LAMMPS library
|
||||
using a Fortran and C compiler, using the wrapper in the fortran
|
||||
directory:
|
||||
using the mpicc (C) and mpifort (Fortran) compilers, using the wrapper
|
||||
in the fortran directory:
|
||||
|
||||
cp ../fortran/libfwrapper.c .
|
||||
gcc -I/home/sjplimp/lammps/src -c libfwrapper.c
|
||||
gfortran -I/home/sjplimp/lammps/src -c simple.f90
|
||||
gfortran -L/home/sjplimp/lammps/src simple.o libfwrapper.o \
|
||||
-llammps -lfftw -lfmpich -lmpich -lpthread -lstdc++ -o simpleF
|
||||
mpicc -I/home/sjplimp/lammps/src -c libfwrapper.c
|
||||
mpifort -c simple.f90
|
||||
mpifort -L/home/sjplimp/lammps/src simple.o libfwrapper.o \
|
||||
-llammps -lfftw -o simpleF
|
||||
|
||||
You then run simpleCC, simpleC, or simpleF on a parallel machine
|
||||
on some number of processors Q with 2 arguments:
|
||||
|
||||
@ -145,7 +145,7 @@ int main(int narg, char **arg)
|
||||
for (i = 0; i < natoms; i++) type[i] = 1;
|
||||
|
||||
lammps_command(lmp,"delete_atoms group all");
|
||||
lammps_create_atoms(lmp,natoms,NULL,type,x,v);
|
||||
lammps_create_atoms(lmp,natoms,NULL,type,x,v,NULL,0);
|
||||
lammps_command(lmp,"run 10");
|
||||
}
|
||||
|
||||
|
||||
@ -109,11 +109,11 @@ int main(int narg, char **arg)
|
||||
int natoms = static_cast<int> (lmp->atom->natoms);
|
||||
x = new double[3*natoms];
|
||||
v = new double[3*natoms];
|
||||
lammps_gather_atoms(lmp,"x",1,3,x);
|
||||
lammps_gather_atoms(lmp,"v",1,3,v);
|
||||
lammps_gather_atoms(lmp,(char *) "x",1,3,x);
|
||||
lammps_gather_atoms(lmp,(char *) "v",1,3,v);
|
||||
double epsilon = 0.1;
|
||||
x[0] += epsilon;
|
||||
lammps_scatter_atoms(lmp,"x",1,3,x);
|
||||
lammps_scatter_atoms(lmp,(char *) "x",1,3,x);
|
||||
|
||||
// these 2 lines are the same
|
||||
|
||||
@ -124,21 +124,22 @@ int main(int narg, char **arg)
|
||||
// extract force on single atom two different ways
|
||||
|
||||
if (lammps == 1) {
|
||||
double **f = (double **) lammps_extract_atom(lmp,"f");
|
||||
double **f = (double **) lammps_extract_atom(lmp,(char *) "f");
|
||||
printf("Force on 1 atom via extract_atom: %g\n",f[0][0]);
|
||||
|
||||
double *fx = (double *) lammps_extract_variable(lmp,"fx","all");
|
||||
double *fx = (double *)
|
||||
lammps_extract_variable(lmp,(char *) "fx",(char *) "all");
|
||||
printf("Force on 1 atom via extract_variable: %g\n",fx[0]);
|
||||
}
|
||||
|
||||
// use commands_string() and commands_list() to invoke more commands
|
||||
|
||||
char *strtwo = "run 10\nrun 20";
|
||||
char *strtwo = (char *) "run 10\nrun 20";
|
||||
if (lammps == 1) lammps_commands_string(lmp,strtwo);
|
||||
|
||||
char *cmds[2];
|
||||
cmds[0] = "run 10";
|
||||
cmds[1] = "run 20";
|
||||
cmds[0] = (char *) "run 10";
|
||||
cmds[1] = (char *) "run 20";
|
||||
if (lammps == 1) lammps_commands_list(lmp,2,cmds);
|
||||
|
||||
// delete all atoms
|
||||
|
||||
@ -115,9 +115,12 @@ PROGRAM f_driver
|
||||
CALL lammps_get_natoms(ptr,natoms)
|
||||
ALLOCATE(x(3*natoms))
|
||||
|
||||
CALL lammps_gather_atoms(ptr,'x',1,3,x);
|
||||
x(1) = x(1) + epsilon
|
||||
CALL lammps_scatter_atoms(ptr,'x',1,3,x);
|
||||
! these calls are commented out, b/c libfwrapper.c
|
||||
! needs to be updated to use gather_atoms and scatter_atoms
|
||||
|
||||
!CALL lammps_gather_atoms(ptr,'x',1,3,x);
|
||||
!x(1) = x(1) + epsilon
|
||||
!CALL lammps_scatter_atoms(ptr,'x',1,3,x);
|
||||
|
||||
DEALLOCATE(x)
|
||||
|
||||
|
||||
116
examples/USER/misc/extep/BN.data
Normal file
@ -0,0 +1,116 @@
|
||||
info: BN sample with r_BN=1.45
|
||||
|
||||
100 atoms
|
||||
2 atom types
|
||||
|
||||
0.0 21.75000000 xlo xhi
|
||||
0.0 12.55736835 ylo yhi
|
||||
0.0 50.00000000 zlo zhi
|
||||
|
||||
Masses
|
||||
|
||||
1 10.811
|
||||
2 14.0067
|
||||
|
||||
Atoms
|
||||
|
||||
1 1 0.00000000 0.00000000 0.00000000
|
||||
2 2 1.45000000 0.00000000 0.00000000
|
||||
3 1 2.17500000 1.25573684 0.00000000
|
||||
4 2 3.62500000 1.25573684 0.00000000
|
||||
5 1 0.00000000 2.51147367 0.00000000
|
||||
6 2 1.45000000 2.51147367 0.00000000
|
||||
7 1 2.17500000 3.76721051 0.00000000
|
||||
8 2 3.62500000 3.76721051 0.00000000
|
||||
9 1 0.00000000 5.02294734 0.00000000
|
||||
10 2 1.45000000 5.02294734 0.00000000
|
||||
11 1 2.17500000 6.27868418 0.00000000
|
||||
12 2 3.62500000 6.27868418 0.00000000
|
||||
13 1 0.00000000 7.53442101 0.00000000
|
||||
14 2 1.45000000 7.53442101 0.00000000
|
||||
15 1 2.17500000 8.79015785 0.00000000
|
||||
16 2 3.62500000 8.79015785 0.00000000
|
||||
17 1 0.00000000 10.04589468 0.00000000
|
||||
18 2 1.45000000 10.04589468 0.00000000
|
||||
19 1 2.17500000 11.30163152 0.00000000
|
||||
20 2 3.62500000 11.30163152 0.00000000
|
||||
21 1 4.35000000 0.00000000 0.00000000
|
||||
22 2 5.80000000 0.00000000 0.00000000
|
||||
23 1 6.52500000 1.25573684 0.00000000
|
||||
24 2 7.97500000 1.25573684 0.00000000
|
||||
25 1 4.35000000 2.51147367 0.00000000
|
||||
26 2 5.80000000 2.51147367 0.00000000
|
||||
27 1 6.52500000 3.76721051 0.00000000
|
||||
28 2 7.97500000 3.76721051 0.00000000
|
||||
29 1 4.35000000 5.02294734 0.00000000
|
||||
30 2 5.80000000 5.02294734 0.00000000
|
||||
31 1 6.52500000 6.27868418 0.00000000
|
||||
32 2 7.97500000 6.27868418 0.00000000
|
||||
33 1 4.35000000 7.53442101 0.00000000
|
||||
34 2 5.80000000 7.53442101 0.00000000
|
||||
35 1 6.52500000 8.79015785 0.00000000
|
||||
36 2 7.97500000 8.79015785 0.00000000
|
||||
37 1 4.35000000 10.04589468 0.00000000
|
||||
38 2 5.80000000 10.04589468 0.00000000
|
||||
39 1 6.52500000 11.30163152 0.00000000
|
||||
40 2 7.97500000 11.30163152 0.00000000
|
||||
41 1 8.70000000 0.00000000 0.00000000
|
||||
42 2 10.15000000 0.00000000 0.00000000
|
||||
43 1 10.87500000 1.25573684 0.00000000
|
||||
44 2 12.32500000 1.25573684 0.00000000
|
||||
45 1 8.70000000 2.51147367 0.00000000
|
||||
46 2 10.15000000 2.51147367 0.00000000
|
||||
47 1 10.87500000 3.76721051 0.00000000
|
||||
48 2 12.32500000 3.76721051 0.00000000
|
||||
49 1 8.70000000 5.02294734 0.00000000
|
||||
50 2 10.15000000 5.02294734 0.00000000
|
||||
51 1 10.87500000 6.27868418 0.00000000
|
||||
52 2 12.32500000 6.27868418 0.00000000
|
||||
53 1 8.70000000 7.53442101 0.00000000
|
||||
54 2 10.15000000 7.53442101 0.00000000
|
||||
55 1 10.87500000 8.79015785 0.00000000
|
||||
56 2 12.32500000 8.79015785 0.00000000
|
||||
57 1 8.70000000 10.04589468 0.00000000
|
||||
58 2 10.15000000 10.04589468 0.00000000
|
||||
59 1 10.87500000 11.30163152 0.00000000
|
||||
60 2 12.32500000 11.30163152 0.00000000
|
||||
61 1 13.05000000 0.00000000 0.00000000
|
||||
62 2 14.50000000 0.00000000 0.00000000
|
||||
63 1 15.22500000 1.25573684 0.00000000
|
||||
64 2 16.67500000 1.25573684 0.00000000
|
||||
65 1 13.05000000 2.51147367 0.00000000
|
||||
66 2 14.50000000 2.51147367 0.00000000
|
||||
67 1 15.22500000 3.76721051 0.00000000
|
||||
68 2 16.67500000 3.76721051 0.00000000
|
||||
69 1 13.05000000 5.02294734 0.00000000
|
||||
70 2 14.50000000 5.02294734 0.00000000
|
||||
71 1 15.22500000 6.27868418 0.00000000
|
||||
72 2 16.67500000 6.27868418 0.00000000
|
||||
73 1 13.05000000 7.53442101 0.00000000
|
||||
74 2 14.50000000 7.53442101 0.00000000
|
||||
75 1 15.22500000 8.79015785 0.00000000
|
||||
76 2 16.67500000 8.79015785 0.00000000
|
||||
77 1 13.05000000 10.04589468 0.00000000
|
||||
78 2 14.50000000 10.04589468 0.00000000
|
||||
79 1 15.22500000 11.30163152 0.00000000
|
||||
80 2 16.67500000 11.30163152 0.00000000
|
||||
81 1 17.40000000 0.00000000 0.00000000
|
||||
82 2 18.85000000 0.00000000 0.00000000
|
||||
83 1 19.57500000 1.25573684 0.00000000
|
||||
84 2 21.02500000 1.25573684 0.00000000
|
||||
85 1 17.40000000 2.51147367 0.00000000
|
||||
86 2 18.85000000 2.51147367 0.00000000
|
||||
87 1 19.57500000 3.76721051 0.00000000
|
||||
88 2 21.02500000 3.76721051 0.00000000
|
||||
89 1 17.40000000 5.02294734 0.00000000
|
||||
90 2 18.85000000 5.02294734 0.00000000
|
||||
91 1 19.57500000 6.27868418 0.00000000
|
||||
92 2 21.02500000 6.27868418 0.00000000
|
||||
93 1 17.40000000 7.53442101 0.00000000
|
||||
94 2 18.85000000 7.53442101 0.00000000
|
||||
95 1 19.57500000 8.79015785 0.00000000
|
||||
96 2 21.02500000 8.79015785 0.00000000
|
||||
97 1 17.40000000 10.04589468 0.00000000
|
||||
98 2 18.85000000 10.04589468 0.00000000
|
||||
99 1 19.57500000 11.30163152 0.00000000
|
||||
100 2 21.02500000 11.30163152 0.00000000
|
||||
29
examples/USER/misc/extep/in.extep-bn
Normal file
@ -0,0 +1,29 @@
|
||||
# Initialization
|
||||
units metal
|
||||
boundary p p p
|
||||
atom_style atomic
|
||||
processors * * 1
|
||||
|
||||
# System and atom definition
|
||||
read_data BN.data # read lammps data file
|
||||
|
||||
# Neighbor update settings
|
||||
neighbor 2.0 bin
|
||||
neigh_modify every 1
|
||||
neigh_modify delay 0
|
||||
neigh_modify check yes
|
||||
|
||||
# Potential
|
||||
pair_style extep
|
||||
pair_coeff * * ../../../../potentials/BN.extep B N
|
||||
|
||||
# Output
|
||||
thermo 10
|
||||
thermo_style custom step time etotal pe temp lx ly lz pxx pyy pzz
|
||||
thermo_modify line one format float %14.8g
|
||||
|
||||
# Setup NPT MD run
|
||||
timestep 0.0001 # ps
|
||||
velocity all create 300.0 12345
|
||||
fix thermos all npt temp 300 300 1.0 x 0 0 1.0 y 0 0 1.0
|
||||
run 1000
|
||||
180
examples/USER/misc/extep/log.23Oct17.extep-bn.g++.1
Normal file
@ -0,0 +1,180 @@
|
||||
LAMMPS (23 Oct 2017)
|
||||
using 1 OpenMP thread(s) per MPI task
|
||||
# Initialization
|
||||
units metal
|
||||
boundary p p p
|
||||
atom_style atomic
|
||||
processors * * 1
|
||||
|
||||
# System and atom definition
|
||||
read_data BN.data # read lammps data file
|
||||
orthogonal box = (0 0 0) to (21.75 12.5574 50)
|
||||
1 by 1 by 1 MPI processor grid
|
||||
reading atoms ...
|
||||
100 atoms
|
||||
|
||||
# Neighbor update settings
|
||||
neighbor 2.0 bin
|
||||
neigh_modify every 1
|
||||
neigh_modify delay 0
|
||||
neigh_modify check yes
|
||||
|
||||
# Potential
|
||||
pair_style extep
|
||||
pair_coeff * * ../../../../potentials/BN.extep B N
|
||||
Reading potential file ../../../../potentials/BN.extep with DATE: 2017-11-28
|
||||
|
||||
# Output
|
||||
thermo 10
|
||||
thermo_style custom step time etotal pe temp lx ly lz pxx pyy pzz
|
||||
thermo_modify line one format float %14.8g
|
||||
|
||||
# Setup NPT MD run
|
||||
timestep 0.0001 # ps
|
||||
velocity all create 300.0 12345
|
||||
fix thermos all npt temp 300 300 1.0 x 0 0 1.0 y 0 0 1.0
|
||||
run 1000
|
||||
Neighbor list info ...
|
||||
update every 1 steps, delay 0 steps, check yes
|
||||
max neighbors/atom: 2000, page size: 100000
|
||||
master list distance cutoff = 4.2
|
||||
ghost atom cutoff = 4.2
|
||||
binsize = 2.1, bins = 11 6 24
|
||||
1 neighbor lists, perpetual/occasional/extra = 1 0 0
|
||||
(1) pair extep, perpetual
|
||||
attributes: full, newton on, ghost
|
||||
pair build: full/bin/ghost
|
||||
stencil: full/ghost/bin/3d
|
||||
bin: standard
|
||||
Per MPI rank memory allocation (min/avg/max) = 2.97 | 2.97 | 2.97 Mbytes
|
||||
Step Time TotEng PotEng Temp Lx Ly Lz Pxx Pyy Pzz
|
||||
0 0 -665.11189 -668.95092 300 21.75 12.557368 50 -1638.8315 -1636.7368 321.73163
|
||||
10 0.001 -665.11194 -668.81065 289.03491 21.749944 12.557333 50 -1391.3771 -1841.1723 316.66669
|
||||
20 0.002 -665.1121 -668.4273 259.06599 21.749789 12.557222 50 -1137.0171 -1980.5977 301.79466
|
||||
30 0.003 -665.11237 -667.90117 217.93027 21.749552 12.557029 50 -912.51949 -2055.822 278.00774
|
||||
40 0.004 -665.11278 -667.36471 175.97662 21.74925 12.556752 50 -755.38643 -2078.0669 246.62816
|
||||
50 0.005 -665.11333 -666.94254 142.94321 21.748894 12.556389 50 -694.93153 -2062.1349 209.26356
|
||||
60 0.006 -665.11405 -666.71476 125.08741 21.748487 12.55594 50 -744.6962 -2019.9093 167.70563
|
||||
70 0.007 -665.11494 -666.69555 123.51632 21.748026 12.555408 50 -898.67863 -1956.2845 123.88845
|
||||
80 0.008 -665.116 -666.83408 134.25892 21.7475 12.554796 50 -1132.5952 -1868.738 79.87581
|
||||
90 0.009 -665.1172 -667.03647 149.98053 21.746893 12.554106 50 -1409.6896 -1750.4875 37.821017
|
||||
100 0.01 -665.11853 -667.20002 162.65705 21.746185 12.553344 50 -1689.1599 -1595.9411 -0.14399002
|
||||
110 0.011 -665.11997 -667.24752 166.25742 21.745356 12.552516 50 -1934.6334 -1406.3665 -32.091026
|
||||
120 0.012 -665.12148 -667.15088 158.58671 21.744389 12.55163 50 -2120.4014 -1193.6117 -56.50543
|
||||
130 0.013 -665.12306 -666.93754 141.7922 21.743271 12.550694 50 -2234.0841 -980.32815 -72.45885
|
||||
140 0.014 -665.1247 -666.67903 121.4631 21.741993 12.549719 50 -2275.5656 -796.26701 -79.693692
|
||||
150 0.015 -665.1264 -666.46562 104.65306 21.740553 12.54871 50 -2253.08 -671.5409 -78.603431
|
||||
160 0.016 -665.1282 -666.37541 97.462619 21.738952 12.547674 50 -2178.0108 -628.83531 -70.130423
|
||||
170 0.017 -665.13011 -666.44775 102.96665 21.737195 12.546611 50 -2060.2073 -677.02227 -55.623931
|
||||
180 0.018 -665.13215 -666.67004 120.17784 21.735292 12.54552 50 -1905.36 -808.22824 -36.699042
|
||||
190 0.019 -665.13431 -666.98201 144.38814 21.733253 12.544396 50 -1715.2526 -999.2481 -15.117617
|
||||
200 0.02 -665.13656 -667.29591 168.74214 21.731091 12.543231 50 -1490.6934 -1216.735 7.3107732
|
||||
210 0.021 -665.13885 -667.52511 186.47391 21.728823 12.542015 50 -1235.9283 -1424.4324 28.822782
|
||||
220 0.022 -665.14112 -667.61153 193.0492 21.726467 12.540741 50 -962.70697 -1590.2885 47.801678
|
||||
230 0.023 -665.14332 -667.54317 187.53534 21.724043 12.539402 50 -692.12856 -1691.6537 62.881768
|
||||
240 0.024 -665.1454 -667.35665 172.79772 21.72157 12.537993 50 -453.02755 -1717.6064 73.041858
|
||||
250 0.025 -665.14735 -667.12424 154.48373 21.719064 12.536514 50 -276.81709 -1668.3598 77.670868
|
||||
260 0.026 -665.14918 -666.92939 139.11409 21.716539 12.534967 50 -190.03656 -1552.4049 76.59734
|
||||
270 0.027 -665.15091 -666.83859 131.88391 21.714 12.533357 50 -206.85537 -1382.4915 70.085105
|
||||
280 0.028 -665.15258 -666.87889 134.90214 21.711446 12.53169 50 -324.01795 -1171.7578 58.801327
|
||||
290 0.029 -665.15421 -667.02881 146.49028 21.708869 12.529975 50 -520.0146 -931.26466 43.758636
|
||||
300 0.03 -665.1558 -667.22646 161.81084 21.706255 12.528222 50 -758.87113 -669.74523 26.225956
|
||||
310 0.031 -665.15734 -667.39183 174.61368 21.703587 12.526442 50 -997.42782 -395.56111 7.601897
|
||||
320 0.032 -665.15878 -667.45546 179.47345 21.700849 12.524646 50 -1193.9402 -119.86797 -10.744258
|
||||
330 0.033 -665.16008 -667.38312 173.71901 21.698026 12.522846 50 -1315.6446 140.7451 -27.638433
|
||||
340 0.034 -665.16118 -667.18792 158.37888 21.695112 12.521051 50 -1343.5396 363.95099 -42.231049
|
||||
350 0.035 -665.16207 -666.92571 137.81938 21.692103 12.519271 50 -1273.6625 524.73453 -54.046178
|
||||
360 0.036 -665.16274 -666.67543 118.20885 21.689004 12.517514 50 -1115.1514 601.37143 -62.932702
|
||||
370 0.037 -665.1632 -666.5115 105.36258 21.685827 12.515781 50 -886.11568 582.42087 -68.942158
|
||||
380 0.038 -665.16348 -666.47849 102.76116 21.682589 12.514072 50 -608.71321 472.04732 -72.193259
|
||||
390 0.039 -665.1636 -666.57728 110.47178 21.679308 12.512382 50 -304.85697 291.41908 -72.787214
|
||||
400 0.04 -665.16356 -666.76741 125.33244 21.676006 12.510704 50 6.3732307 75.407852 -70.806087
|
||||
410 0.041 -665.16336 -666.98363 142.24457 21.672705 12.50903 50 309.23046 -134.40319 -66.378966
|
||||
420 0.042 -665.16298 -667.15939 156.00935 21.669426 12.507351 50 590.16982 -298.16702 -59.767469
|
||||
430 0.043 -665.16239 -667.24843 163.01313 21.66619 12.50566 50 836.19535 -385.22443 -51.420249
|
||||
440 0.044 -665.16157 -667.23746 162.2204 21.663014 12.503955 50 1033.943 -378.7816 -41.969885
|
||||
450 0.045 -665.1605 -667.14707 155.24066 21.659911 12.502234 50 1170.3399 -277.11556 -32.175503
|
||||
460 0.046 -665.15917 -667.0218 145.55489 21.656891 12.500503 50 1234.9026 -91.620499 -22.833423
|
||||
470 0.047 -665.15761 -666.91366 137.22578 21.65396 12.498768 50 1222.9519 157.31306 -14.680548
|
||||
480 0.048 -665.15585 -666.86462 133.53159 21.651114 12.497041 50 1138.5551 445.2926 -8.3071781
|
||||
490 0.049 -665.15393 -666.89359 135.9458 21.64835 12.495333 50 996.00682 748.51842 -4.0872169
|
||||
500 0.05 -665.15188 -666.99142 143.75058 21.645657 12.493655 50 819.08561 1046.9785 -2.1306918
|
||||
510 0.051 -665.14975 -667.12519 154.36991 21.643022 12.49202 50 637.99022 1325.7112 -2.2650822
|
||||
520 0.052 -665.14756 -667.25 164.29491 21.640432 12.49044 50 484.54509 1574.1916 -4.0528391
|
||||
530 0.053 -665.14531 -667.32459 170.29969 21.637878 12.488923 50 386.77357 1784.4858 -6.8479114
|
||||
540 0.054 -665.143 -667.32552 170.55254 21.635352 12.48748 50 364.14599 1949.2189 -9.8841824
|
||||
550 0.055 -665.14064 -667.25527 165.24765 21.632853 12.486117 50 424.6565 2060.4607 -12.37851
|
||||
560 0.056 -665.13822 -667.14127 156.52756 21.630385 12.484837 50 564.3912 2110.2547 -13.62742
|
||||
570 0.057 -665.13576 -667.0259 147.70502 21.627958 12.483643 50 769.54354 2092.8157 -13.082914
|
||||
580 0.058 -665.13327 -666.95107 142.05154 21.625586 12.482535 50 1020.1218 2007.6508 -10.405617
|
||||
590 0.059 -665.13079 -666.94279 141.59877 21.623287 12.481508 50 1294.1274 1862.3568 -5.5031153
|
||||
600 0.06 -665.12832 -667.00189 146.40928 21.621079 12.480557 50 1570.9478 1673.8456 1.4410957
|
||||
610 0.061 -665.12591 -667.10417 154.59072 21.618982 12.479674 50 1833.1388 1467.2639 9.9561573
|
||||
620 0.062 -665.12355 -667.20973 163.02368 21.617015 12.478851 50 2066.4951 1272.6732 19.310607
|
||||
630 0.063 -665.12128 -667.27744 168.49239 21.615193 12.47808 50 2259.0193 1120.2758 28.59477
|
||||
640 0.064 -665.11911 -667.27898 168.7823 21.613531 12.477355 50 2399.792 1035.3525 36.8539
|
||||
650 0.065 -665.11707 -667.20773 163.37438 21.612037 12.476673 50 2478.6675 1034.0481 43.239368
|
||||
660 0.066 -665.11518 -667.0802 153.55598 21.610718 12.476033 50 2487.2505 1120.8274 47.131883
|
||||
670 0.067 -665.11345 -666.93026 141.97434 21.609573 12.475439 50 2420.9786 1288.0136 48.201717
|
||||
680 0.068 -665.11191 -666.79864 131.80955 21.608598 12.474897 50 2281.6131 1517.4002 46.399066
|
||||
690 0.069 -665.11056 -666.72065 125.82027 21.607784 12.474418 50 2079.2055 1783.5346 41.895586
|
||||
700 0.07 -665.10941 -666.71578 125.5291 21.607116 12.474011 50 1832.7039 2057.9076 35.011051
|
||||
710 0.071 -665.10848 -666.78203 130.77932 21.606577 12.473687 50 1568.7275 2313.0601 26.153491
|
||||
720 0.072 -665.10776 -666.89681 139.80468 21.606148 12.473458 50 1318.5189 2525.6808 15.783637
|
||||
730 0.073 -665.10727 -667.0243 149.80574 21.605812 12.47333 50 1113.5537 2678.1859 4.3967762
|
||||
740 0.074 -665.10701 -667.12698 157.85016 21.605555 12.473311 50 980.633 2758.9123 -7.4930622
|
||||
750 0.075 -665.10697 -667.17729 161.78497 21.605368 12.473404 50 937.45086 2761.5936 -19.376492
|
||||
760 0.076 -665.10714 -667.1654 160.84249 21.605247 12.473609 50 989.5724 2684.9256 -30.776106
|
||||
770 0.077 -665.1075 -667.10061 155.75086 21.605196 12.473922 50 1129.4775 2532.7048 -41.263677
|
||||
780 0.078 -665.10803 -667.00654 148.35835 21.605226 12.474338 50 1337.8663 2314.4556 -50.455407
|
||||
790 0.079 -665.10869 -666.91242 140.9515 21.605349 12.474848 50 1586.9099 2045.9808 -57.988114
|
||||
800 0.08 -665.10946 -666.84375 135.52533 21.605585 12.475441 50 1844.7038 1749.1281 -63.495405
|
||||
810 0.081 -665.11032 -666.81538 133.24173 21.60595 12.476105 50 2079.9601 1450.3113 -66.60795
|
||||
820 0.082 -665.11127 -666.82877 134.21424 21.606461 12.476828 50 2266.0059 1177.7937 -66.990929
|
||||
830 0.083 -665.1123 -666.87353 137.6312 21.607131 12.477599 50 2383.4351 958.19752 -64.411861
|
||||
840 0.084 -665.11343 -666.93214 142.12323 21.607968 12.478409 50 2421.1969 812.91475 -58.816538
|
||||
850 0.085 -665.11467 -666.98597 146.2321 21.608975 12.479253 50 2376.3483 755.06052 -50.389393
|
||||
860 0.086 -665.11603 -667.02075 148.84448 21.610149 12.480128 50 2252.9811 787.43069 -39.585062
|
||||
870 0.087 -665.1175 -667.03045 149.48743 21.611481 12.481034 50 2060.884 901.76342 -27.129117
|
||||
880 0.088 -665.11907 -667.01838 148.42091 21.612958 12.481978 50 1814.3354 1079.4855 -13.988401
|
||||
890 0.089 -665.12073 -666.99552 146.50471 21.614562 12.482966 50 1531.1565 1293.9709 -1.305884
|
||||
900 0.09 -665.12247 -666.97639 144.87389 21.616275 12.484007 50 1231.9005 1514.0741 9.7083525
|
||||
910 0.091 -665.12426 -666.97371 144.52455 21.618074 12.485109 50 938.90089 1708.364 17.929974
|
||||
920 0.092 -665.12609 -666.99389 145.95889 21.61994 12.486281 50 674.90767 1849.2415 22.497207
|
||||
930 0.093 -665.12794 -667.03498 149.02559 21.621853 12.487528 50 461.18604 1916.1468 22.971745
|
||||
940 0.094 -665.12977 -667.08777 153.00718 21.6238 12.488852 50 315.19601 1897.3867 19.43758
|
||||
950 0.095 -665.13156 -667.13925 156.8903 21.62577 12.490254 50 248.20946 1790.5667 12.504818
|
||||
960 0.096 -665.13326 -667.17668 159.68273 21.627757 12.491728 50 263.35912 1601.9528 3.2123256
|
||||
970 0.097 -665.13485 -667.19079 160.6611 21.629764 12.493267 50 354.58496 1345.1489 -7.1487162
|
||||
980 0.098 -665.13628 -667.17758 159.5175 21.631796 12.494862 50 506.7626 1039.346 -17.249179
|
||||
990 0.099 -665.13753 -667.13942 156.43758 21.633864 12.496499 50 697.06054 707.26671 -25.92737
|
||||
1000 0.1 -665.13859 -667.0853 152.12472 21.635982 12.498164 50 897.38498 372.94791 -32.344697
|
||||
Loop time of 0.463574 on 1 procs for 1000 steps with 100 atoms
|
||||
|
||||
Performance: 18.638 ns/day, 1.288 hours/ns, 2157.152 timesteps/s
|
||||
99.0% CPU use with 1 MPI tasks x 1 OpenMP threads
|
||||
|
||||
MPI task timing breakdown:
|
||||
Section | min time | avg time | max time |%varavg| %total
|
||||
---------------------------------------------------------------
|
||||
Pair | 0.44776 | 0.44776 | 0.44776 | 0.0 | 96.59
|
||||
Neigh | 0 | 0 | 0 | 0.0 | 0.00
|
||||
Comm | 0.0023057 | 0.0023057 | 0.0023057 | 0.0 | 0.50
|
||||
Output | 0.0015752 | 0.0015752 | 0.0015752 | 0.0 | 0.34
|
||||
Modify | 0.010602 | 0.010602 | 0.010602 | 0.0 | 2.29
|
||||
Other | | 0.001331 | | | 0.29
|
||||
|
||||
Nlocal: 100 ave 100 max 100 min
|
||||
Histogram: 1 0 0 0 0 0 0 0 0 0
|
||||
Nghost: 360 ave 360 max 360 min
|
||||
Histogram: 1 0 0 0 0 0 0 0 0 0
|
||||
Neighs: 0 ave 0 max 0 min
|
||||
Histogram: 1 0 0 0 0 0 0 0 0 0
|
||||
FullNghs: 1800 ave 1800 max 1800 min
|
||||
Histogram: 1 0 0 0 0 0 0 0 0 0
|
||||
|
||||
Total # of neighbors = 1800
|
||||
Ave neighs/atom = 18
|
||||
Neighbor list builds = 0
|
||||
Dangerous builds = 0
|
||||
Total wall time: 0:00:00
|
||||
180
examples/USER/misc/extep/log.23Oct17.extep-bn.g++.4
Normal file
@ -0,0 +1,180 @@
|
||||
LAMMPS (23 Oct 2017)
|
||||
using 1 OpenMP thread(s) per MPI task
|
||||
# Initialization
|
||||
units metal
|
||||
boundary p p p
|
||||
atom_style atomic
|
||||
processors * * 1
|
||||
|
||||
# System and atom definition
|
||||
read_data BN.data # read lammps data file
|
||||
orthogonal box = (0 0 0) to (21.75 12.5574 50)
|
||||
2 by 2 by 1 MPI processor grid
|
||||
reading atoms ...
|
||||
100 atoms
|
||||
|
||||
# Neighbor update settings
|
||||
neighbor 2.0 bin
|
||||
neigh_modify every 1
|
||||
neigh_modify delay 0
|
||||
neigh_modify check yes
|
||||
|
||||
# Potential
|
||||
pair_style extep
|
||||
pair_coeff * * ../../../../potentials/BN.extep B N
|
||||
Reading potential file ../../../../potentials/BN.extep with DATE: 2017-11-28
|
||||
|
||||
# Output
|
||||
thermo 10
|
||||
thermo_style custom step time etotal pe temp lx ly lz pxx pyy pzz
|
||||
thermo_modify line one format float %14.8g
|
||||
|
||||
# Setup NPT MD run
|
||||
timestep 0.0001 # ps
|
||||
velocity all create 300.0 12345
|
||||
fix thermos all npt temp 300 300 1.0 x 0 0 1.0 y 0 0 1.0
|
||||
run 1000
|
||||
Neighbor list info ...
|
||||
update every 1 steps, delay 0 steps, check yes
|
||||
max neighbors/atom: 2000, page size: 100000
|
||||
master list distance cutoff = 4.2
|
||||
ghost atom cutoff = 4.2
|
||||
binsize = 2.1, bins = 11 6 24
|
||||
1 neighbor lists, perpetual/occasional/extra = 1 0 0
|
||||
(1) pair extep, perpetual
|
||||
attributes: full, newton on, ghost
|
||||
pair build: full/bin/ghost
|
||||
stencil: full/ghost/bin/3d
|
||||
bin: standard
|
||||
Per MPI rank memory allocation (min/avg/max) = 2.943 | 2.943 | 2.943 Mbytes
|
||||
Step Time TotEng PotEng Temp Lx Ly Lz Pxx Pyy Pzz
|
||||
0 0 -665.11189 -668.95092 300 21.75 12.557368 50 -1638.8315 -1636.7368 321.73163
|
||||
10 0.001 -665.11194 -668.81065 289.03491 21.749944 12.557333 50 -1391.3771 -1841.1723 316.66669
|
||||
20 0.002 -665.1121 -668.4273 259.06599 21.749789 12.557222 50 -1137.0171 -1980.5977 301.79466
|
||||
30 0.003 -665.11237 -667.90117 217.93027 21.749552 12.557029 50 -912.51949 -2055.822 278.00774
|
||||
40 0.004 -665.11278 -667.36471 175.97662 21.74925 12.556752 50 -755.38643 -2078.0669 246.62816
|
||||
50 0.005 -665.11333 -666.94254 142.94321 21.748894 12.556389 50 -694.93153 -2062.1349 209.26356
|
||||
60 0.006 -665.11405 -666.71476 125.08741 21.748487 12.55594 50 -744.6962 -2019.9093 167.70563
|
||||
70 0.007 -665.11494 -666.69555 123.51632 21.748026 12.555408 50 -898.67863 -1956.2845 123.88845
|
||||
80 0.008 -665.116 -666.83408 134.25892 21.7475 12.554796 50 -1132.5952 -1868.738 79.87581
|
||||
90 0.009 -665.1172 -667.03647 149.98053 21.746893 12.554106 50 -1409.6896 -1750.4875 37.821017
|
||||
100 0.01 -665.11853 -667.20002 162.65705 21.746185 12.553344 50 -1689.1599 -1595.9411 -0.14399002
|
||||
110 0.011 -665.11997 -667.24752 166.25742 21.745356 12.552516 50 -1934.6334 -1406.3665 -32.091026
|
||||
120 0.012 -665.12148 -667.15088 158.58671 21.744389 12.55163 50 -2120.4014 -1193.6117 -56.50543
|
||||
130 0.013 -665.12306 -666.93754 141.7922 21.743271 12.550694 50 -2234.0841 -980.32815 -72.45885
|
||||
140 0.014 -665.1247 -666.67903 121.4631 21.741993 12.549719 50 -2275.5656 -796.26701 -79.693692
|
||||
150 0.015 -665.1264 -666.46562 104.65306 21.740553 12.54871 50 -2253.08 -671.5409 -78.603431
|
||||
160 0.016 -665.1282 -666.37541 97.462619 21.738952 12.547674 50 -2178.0108 -628.83531 -70.130423
|
||||
170 0.017 -665.13011 -666.44775 102.96665 21.737195 12.546611 50 -2060.2073 -677.02227 -55.623931
|
||||
180 0.018 -665.13215 -666.67004 120.17784 21.735292 12.54552 50 -1905.36 -808.22824 -36.699042
|
||||
190 0.019 -665.13431 -666.98201 144.38814 21.733253 12.544396 50 -1715.2526 -999.2481 -15.117617
|
||||
200 0.02 -665.13656 -667.29591 168.74214 21.731091 12.543231 50 -1490.6934 -1216.735 7.3107732
|
||||
210 0.021 -665.13885 -667.52511 186.47391 21.728823 12.542015 50 -1235.9283 -1424.4324 28.822782
|
||||
220 0.022 -665.14112 -667.61153 193.0492 21.726467 12.540741 50 -962.70697 -1590.2885 47.801678
|
||||
230 0.023 -665.14332 -667.54317 187.53534 21.724043 12.539402 50 -692.12856 -1691.6537 62.881768
|
||||
240 0.024 -665.1454 -667.35665 172.79772 21.72157 12.537993 50 -453.02755 -1717.6064 73.041858
|
||||
250 0.025 -665.14735 -667.12424 154.48373 21.719064 12.536514 50 -276.81709 -1668.3598 77.670868
|
||||
260 0.026 -665.14918 -666.92939 139.11409 21.716539 12.534967 50 -190.03656 -1552.4049 76.59734
|
||||
270 0.027 -665.15091 -666.83859 131.88391 21.714 12.533357 50 -206.85537 -1382.4915 70.085105
|
||||
280 0.028 -665.15258 -666.87889 134.90214 21.711446 12.53169 50 -324.01795 -1171.7578 58.801327
|
||||
290 0.029 -665.15421 -667.02881 146.49028 21.708869 12.529975 50 -520.0146 -931.26466 43.758636
|
||||
300 0.03 -665.1558 -667.22646 161.81084 21.706255 12.528222 50 -758.87113 -669.74523 26.225956
|
||||
310 0.031 -665.15734 -667.39183 174.61368 21.703587 12.526442 50 -997.42782 -395.56111 7.601897
|
||||
320 0.032 -665.15878 -667.45546 179.47345 21.700849 12.524646 50 -1193.9402 -119.86797 -10.744258
|
||||
330 0.033 -665.16008 -667.38312 173.71901 21.698026 12.522846 50 -1315.6446 140.7451 -27.638433
|
||||
340 0.034 -665.16118 -667.18792 158.37888 21.695112 12.521051 50 -1343.5396 363.95099 -42.231049
|
||||
350 0.035 -665.16207 -666.92571 137.81938 21.692103 12.519271 50 -1273.6625 524.73453 -54.046178
|
||||
360 0.036 -665.16274 -666.67543 118.20885 21.689004 12.517514 50 -1115.1514 601.37143 -62.932702
|
||||
370 0.037 -665.1632 -666.5115 105.36258 21.685827 12.515781 50 -886.11568 582.42087 -68.942158
|
||||
380 0.038 -665.16348 -666.47849 102.76116 21.682589 12.514072 50 -608.71321 472.04732 -72.193259
|
||||
390 0.039 -665.1636 -666.57728 110.47178 21.679308 12.512382 50 -304.85697 291.41908 -72.787214
|
||||
400 0.04 -665.16356 -666.76741 125.33244 21.676006 12.510704 50 6.3732307 75.407852 -70.806087
|
||||
410 0.041 -665.16336 -666.98363 142.24457 21.672705 12.50903 50 309.23046 -134.40319 -66.378966
|
||||
420 0.042 -665.16298 -667.15939 156.00935 21.669426 12.507351 50 590.16982 -298.16702 -59.767469
|
||||
430 0.043 -665.16239 -667.24843 163.01313 21.66619 12.50566 50 836.19535 -385.22443 -51.420249
|
||||
440 0.044 -665.16157 -667.23746 162.2204 21.663014 12.503955 50 1033.943 -378.7816 -41.969885
|
||||
450 0.045 -665.1605 -667.14707 155.24066 21.659911 12.502234 50 1170.3399 -277.11556 -32.175503
|
||||
460 0.046 -665.15917 -667.0218 145.55489 21.656891 12.500503 50 1234.9026 -91.620499 -22.833423
|
||||
470 0.047 -665.15761 -666.91366 137.22578 21.65396 12.498768 50 1222.9519 157.31306 -14.680548
|
||||
480 0.048 -665.15585 -666.86462 133.53159 21.651114 12.497041 50 1138.5551 445.2926 -8.3071781
|
||||
490 0.049 -665.15393 -666.89359 135.9458 21.64835 12.495333 50 996.00682 748.51842 -4.0872169
|
||||
500 0.05 -665.15188 -666.99142 143.75058 21.645657 12.493655 50 819.08561 1046.9785 -2.1306918
|
||||
510 0.051 -665.14975 -667.12519 154.36991 21.643022 12.49202 50 637.99022 1325.7112 -2.2650822
|
||||
520 0.052 -665.14756 -667.25 164.29491 21.640432 12.49044 50 484.54509 1574.1916 -4.0528391
|
||||
530 0.053 -665.14531 -667.32459 170.29969 21.637878 12.488923 50 386.77357 1784.4858 -6.8479114
|
||||
540 0.054 -665.143 -667.32552 170.55254 21.635352 12.48748 50 364.14599 1949.2189 -9.8841824
|
||||
550 0.055 -665.14064 -667.25527 165.24765 21.632853 12.486117 50 424.6565 2060.4607 -12.37851
|
||||
560 0.056 -665.13822 -667.14127 156.52756 21.630385 12.484837 50 564.3912 2110.2547 -13.62742
|
||||
570 0.057 -665.13576 -667.0259 147.70502 21.627958 12.483643 50 769.54354 2092.8157 -13.082914
|
||||
580 0.058 -665.13327 -666.95107 142.05154 21.625586 12.482535 50 1020.1218 2007.6508 -10.405617
|
||||
590 0.059 -665.13079 -666.94279 141.59877 21.623287 12.481508 50 1294.1274 1862.3568 -5.5031153
|
||||
600 0.06 -665.12832 -667.00189 146.40928 21.621079 12.480557 50 1570.9478 1673.8456 1.4410957
|
||||
610 0.061 -665.12591 -667.10417 154.59072 21.618982 12.479674 50 1833.1388 1467.2639 9.9561573
|
||||
620 0.062 -665.12355 -667.20973 163.02368 21.617015 12.478851 50 2066.4951 1272.6732 19.310607
|
||||
630 0.063 -665.12128 -667.27744 168.49239 21.615193 12.47808 50 2259.0193 1120.2758 28.59477
|
||||
640 0.064 -665.11911 -667.27898 168.7823 21.613531 12.477355 50 2399.792 1035.3525 36.8539
|
||||
650 0.065 -665.11707 -667.20773 163.37438 21.612037 12.476673 50 2478.6675 1034.0481 43.239368
|
||||
660 0.066 -665.11518 -667.0802 153.55598 21.610718 12.476033 50 2487.2505 1120.8274 47.131883
|
||||
670 0.067 -665.11345 -666.93026 141.97434 21.609573 12.475439 50 2420.9786 1288.0136 48.201717
|
||||
680 0.068 -665.11191 -666.79864 131.80955 21.608598 12.474897 50 2281.6131 1517.4002 46.399066
|
||||
690 0.069 -665.11056 -666.72065 125.82027 21.607784 12.474418 50 2079.2055 1783.5346 41.895586
|
||||
700 0.07 -665.10941 -666.71578 125.5291 21.607116 12.474011 50 1832.7039 2057.9076 35.011051
|
||||
710 0.071 -665.10848 -666.78203 130.77932 21.606577 12.473687 50 1568.7275 2313.0601 26.153491
|
||||
720 0.072 -665.10776 -666.89681 139.80468 21.606148 12.473458 50 1318.5189 2525.6808 15.783637
|
||||
730 0.073 -665.10727 -667.0243 149.80574 21.605812 12.47333 50 1113.5537 2678.1859 4.3967762
|
||||
740 0.074 -665.10701 -667.12698 157.85016 21.605555 12.473311 50 980.633 2758.9123 -7.4930622
|
||||
750 0.075 -665.10697 -667.17729 161.78497 21.605368 12.473404 50 937.45086 2761.5936 -19.376492
|
||||
760 0.076 -665.10714 -667.1654 160.84249 21.605247 12.473609 50 989.5724 2684.9256 -30.776106
|
||||
770 0.077 -665.1075 -667.10061 155.75086 21.605196 12.473922 50 1129.4775 2532.7048 -41.263677
|
||||
780 0.078 -665.10803 -667.00654 148.35835 21.605226 12.474338 50 1337.8663 2314.4556 -50.455407
|
||||
790 0.079 -665.10869 -666.91242 140.9515 21.605349 12.474848 50 1586.9099 2045.9808 -57.988114
|
||||
800 0.08 -665.10946 -666.84375 135.52533 21.605585 12.475441 50 1844.7038 1749.1281 -63.495405
|
||||
810 0.081 -665.11032 -666.81538 133.24173 21.60595 12.476105 50 2079.9601 1450.3113 -66.60795
|
||||
820 0.082 -665.11127 -666.82877 134.21424 21.606461 12.476828 50 2266.0059 1177.7937 -66.990929
|
||||
830 0.083 -665.1123 -666.87353 137.6312 21.607131 12.477599 50 2383.4351 958.19752 -64.411861
|
||||
840 0.084 -665.11343 -666.93214 142.12323 21.607968 12.478409 50 2421.1969 812.91475 -58.816538
|
||||
850 0.085 -665.11467 -666.98597 146.2321 21.608975 12.479253 50 2376.3483 755.06052 -50.389393
|
||||
860 0.086 -665.11603 -667.02075 148.84448 21.610149 12.480128 50 2252.9811 787.43069 -39.585062
|
||||
870 0.087 -665.1175 -667.03045 149.48743 21.611481 12.481034 50 2060.884 901.76342 -27.129117
|
||||
880 0.088 -665.11907 -667.01838 148.42091 21.612958 12.481978 50 1814.3354 1079.4855 -13.988401
|
||||
890 0.089 -665.12073 -666.99552 146.50471 21.614562 12.482966 50 1531.1565 1293.9709 -1.305884
|
||||
900 0.09 -665.12247 -666.97639 144.87389 21.616275 12.484007 50 1231.9005 1514.0741 9.7083525
|
||||
910 0.091 -665.12426 -666.97371 144.52455 21.618074 12.485109 50 938.90089 1708.364 17.929974
|
||||
920 0.092 -665.12609 -666.99389 145.95889 21.61994 12.486281 50 674.90767 1849.2415 22.497207
|
||||
930 0.093 -665.12794 -667.03498 149.02559 21.621853 12.487528 50 461.18604 1916.1468 22.971745
|
||||
940 0.094 -665.12977 -667.08777 153.00718 21.6238 12.488852 50 315.19601 1897.3867 19.43758
|
||||
950 0.095 -665.13156 -667.13925 156.8903 21.62577 12.490254 50 248.20946 1790.5667 12.504818
|
||||
960 0.096 -665.13326 -667.17668 159.68273 21.627757 12.491728 50 263.35912 1601.9528 3.2123256
|
||||
970 0.097 -665.13485 -667.19079 160.6611 21.629764 12.493267 50 354.58496 1345.1489 -7.1487162
|
||||
980 0.098 -665.13628 -667.17758 159.5175 21.631796 12.494862 50 506.7626 1039.346 -17.249179
|
||||
990 0.099 -665.13753 -667.13942 156.43758 21.633864 12.496499 50 697.06054 707.26671 -25.92737
|
||||
1000 0.1 -665.13859 -667.0853 152.12472 21.635982 12.498164 50 897.38498 372.94791 -32.344697
|
||||
Loop time of 0.174508 on 4 procs for 1000 steps with 100 atoms
|
||||
|
||||
Performance: 49.511 ns/day, 0.485 hours/ns, 5730.393 timesteps/s
|
||||
98.8% CPU use with 4 MPI tasks x 1 OpenMP threads
|
||||
|
||||
MPI task timing breakdown:
|
||||
Section | min time | avg time | max time |%varavg| %total
|
||||
---------------------------------------------------------------
|
||||
Pair | 0.12409 | 0.12834 | 0.13408 | 1.1 | 73.54
|
||||
Neigh | 0 | 0 | 0 | 0.0 | 0.00
|
||||
Comm | 0.016369 | 0.021358 | 0.025324 | 2.7 | 12.24
|
||||
Output | 0.0023892 | 0.0025101 | 0.0028272 | 0.4 | 1.44
|
||||
Modify | 0.01733 | 0.018302 | 0.018958 | 0.5 | 10.49
|
||||
Other | | 0.003995 | | | 2.29
|
||||
|
||||
Nlocal: 25 ave 26 max 24 min
|
||||
Histogram: 2 0 0 0 0 0 0 0 0 2
|
||||
Nghost: 179 ave 180 max 178 min
|
||||
Histogram: 2 0 0 0 0 0 0 0 0 2
|
||||
Neighs: 0 ave 0 max 0 min
|
||||
Histogram: 4 0 0 0 0 0 0 0 0 0
|
||||
FullNghs: 450 ave 468 max 432 min
|
||||
Histogram: 2 0 0 0 0 0 0 0 0 2
|
||||
|
||||
Total # of neighbors = 1800
|
||||
Ave neighs/atom = 18
|
||||
Neighbor list builds = 0
|
||||
Dangerous builds = 0
|
||||
Total wall time: 0:00:00
|
||||
74
examples/USER/misc/rhok/README.md
Normal file
@ -0,0 +1,74 @@
|
||||
# The Interface Pinning method for studying solid-liquid transitions
|
||||
|
||||
In this example we will use the interface pinnig method to study a solid-liquid transition.
|
||||
This is done by adding a harmonic potential to the Hamiltonian
|
||||
that bias the system towards two-phase configurations:
|
||||
|
||||
U_bias = 0.5*K*(Q-a)^2
|
||||
|
||||
The bias field couple to an order-parameter of crystallinity Q. The implementation use long-range order:
|
||||
|
||||
Q=|rho_k|,
|
||||
|
||||
where rho_k is the collective density field of the wave-vector k.
|
||||
For future reference we note that the structure factor S(k) is given by the variance of the collective density field:
|
||||
|
||||
S(k)=|rho_k|^2.
|
||||
|
||||
### About the method
|
||||
|
||||
It is recommended to get familiar with the interface pinning method by reading:
|
||||
|
||||
[Ulf R. Pedersen, JCP 139, 104102 (2013)](http://dx.doi.org/10.1063/1.4818747)
|
||||
|
||||
A detailed bibliography is provided at
|
||||
|
||||
<http://urp.dk/interface_pinning.htm>
|
||||
|
||||
and a brief introduction can be found at YouTube:
|
||||
|
||||
[](http://www.youtube.com/watch?v=F_79JZNdyoQ)
|
||||
|
||||
### Implimentation in LAMMPS
|
||||
|
||||
For this example we will be using the rhok fix.
|
||||
|
||||
fix [name] [groupID] rhok [nx] [ny] [nz] [K] [a]
|
||||
|
||||
This fix include a harmonic bias potential U_bias=0.5*K*(|rho_k|-a)^2 to the force calculation.
|
||||
The elements of the wave-vector k is given by the nx, ny and nz input:
|
||||
|
||||
k_x = (2 pi / L_x) * n_x, k_y = (2 pi / L_y) * n_y and k_z = (2 pi / L_z) * n_z.
|
||||
|
||||
We will use a k vector that correspond to a Bragg peak.
|
||||
|
||||
## Example: the Lennard-Jones (LJ) model
|
||||
|
||||
We will use the interface pinning method to study melting of the LJ model
|
||||
at temperature 0.8 and pressure 2.185. This is a coexistence state-point, and the method
|
||||
can be used to show this. The present directory contains the input files that we will use:
|
||||
|
||||
in.crystal
|
||||
in.setup
|
||||
in.pinning
|
||||
|
||||
1. First we will determine the density of the crystal with the LAMMPS input file in.crystal.
|
||||
From the output we get that the average density after equilibration is 0.9731.
|
||||
We need this density to ensure hydrostatic pressure when in a two-phase simulation.
|
||||
|
||||
2. Next, we setup a two-phase configuration using in.setup.
|
||||
|
||||
3. Finally, we run a two-phase simulation with the bias-field applied using in.pinning.
|
||||
The last column in the output show |rho_k|. We note that after a equilibration period
|
||||
the value fluctuates around the anchor point (a) -- showing that this is indeed a coexistence
|
||||
state point.
|
||||
|
||||
The reference [JCP 139, 104102 (2013)](http://dx.doi.org/10.1063/1.4818747) gives details on using the method to find coexistence state points,
|
||||
and the reference [JCP 142, 044104 (2015)](http://dx.doi.org/10.1063/1.4818747) show how the crystal growth rate can be computed from fluctuations.
|
||||
That method have been experienced to be most effective in the slightly super-heated regime above the melting temperature.
|
||||
|
||||
## Contact
|
||||
|
||||
Ulf R. Pedersen;
|
||||
<http://www.urp.dk>;
|
||||
ulf AT urp.dk
|
||||