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423 Commits

Author SHA1 Message Date
a31134a16f Merge branch 'master' into coulomb-refactoring 2017-03-30 14:23:59 -04:00
ae56b9ad89 patch 31Mar17 for stable release 2017-03-30 10:07:27 -06:00
4466d9fb4a Merge pull request #440 from ohenrich/user-cgdna
Updated lammps.book, USER-CGDNA install script
2017-03-30 09:34:35 -06:00
ac1aa9edea Updated README 2017-03-29 11:18:04 +01:00
c733204a70 Updated lammps.book and install script 2017-03-29 08:28:03 +01:00
4b9d0a9566 sync with SVN 2017-03-28 13:26:12 -06:00
0637f23875 patch 28Mar17 2017-03-28 13:12:23 -06:00
9f6e126a2f Merge pull request #437 from ohenrich/user-cgdna
User cgdna
2017-03-28 12:52:26 -06:00
645f56cf70 Merge pull request #436 from Pakketeretet2/better_incorrect_input_handling_nh
Changed the check on initial and final temperature to <= 0 for both.
2017-03-28 12:51:17 -06:00
80e5111dca Merge pull request #434 from akohlmey/imgflags-in-library
improved image flag handling in library interface
2017-03-28 12:50:13 -06:00
7e9f05b617 Merge pull request #433 from akohlmey/fixes-for-stable
More small fixes for stable release
2017-03-28 12:49:09 -06:00
1d8f0c762d Merge branch 'master' into fixes-for-stable 2017-03-28 14:37:30 -04:00
ef6070cbde remove executable permissions for potential files 2017-03-28 14:35:58 -04:00
61f3ff1d2b Merge branch 'master' of github.com:lammps/lammps 2017-03-28 12:35:33 -06:00
111d350a22 fix gcmc units change for chemical potential 2017-03-28 12:34:46 -06:00
1dfd61f532 Merge pull request #432 from Pakketeretet2/user_manifold_fix
Fixed a bug with equal-style variables as manifold params.
2017-03-28 12:33:45 -06:00
5c1f5462e7 Removed contribution line from header files 2017-03-28 19:08:24 +01:00
66a6375405 Resolved merge conflict 2017-03-28 18:58:31 +01:00
604afebf6f Update to oxDNA2 2017-03-28 18:22:02 +01:00
8afed61db1 Upgrade to oxDNA2 2017-03-28 18:16:36 +01:00
ee55a98103 Changed the check on initial and final temperature to <= 0 for both. 2017-03-28 11:22:10 -04:00
f8da9a866a synchronize dump custom/vtk documentation with that of dump custom 2017-03-28 11:00:22 -04:00
28bdebd3c0 avoid segfault when calling PPPM*::memory_usage() before grid communication is initialized 2017-03-28 07:50:48 -04:00
fc51c38abb add some docs for the special treatment of image flags 2017-03-28 02:22:45 -04:00
443ea13eff add image flag packing/unpacking to library/python interface 2017-03-28 02:05:05 -04:00
5feeb79c13 one more line of dead code removed 2017-03-27 15:16:28 -04:00
a241b2d0f7 fix problems with references 2017-03-27 15:01:32 -04:00
61e7595a94 remove references to xmovie, streamline dump and viz descriptions 2017-03-27 14:59:58 -04:00
da9096750e update .gitignore for newly added files 2017-03-27 14:30:21 -04:00
87ea9ba661 bugfix for library interface 2017-03-27 14:29:13 -04:00
c041727e4f remove dead code and reduce trivial compiler warnings (clang++) 2017-03-27 14:28:50 -04:00
3feffbe1de Removed diagnostics. 2017-03-27 13:49:53 -04:00
04fd038d35 Fixed a bug with equal-style variables as manifold params. 2017-03-27 13:46:57 -04:00
3dfe4505dd 24Mar17 patch sync with SVN 2017-03-24 15:17:51 -06:00
394e9b42b0 new CHARMM pair styles with force swithing/shifting 2017-03-24 13:53:07 -06:00
e6fcaefe95 Merge pull request #431 from v0i0/fix-airebo-morse
Fix airebo/morse
2017-03-24 10:03:29 -06:00
f5a85d68ad Merge pull request #429 from akohlmey/updates-for-stable
Collected updates for stable release
2017-03-24 10:01:23 -06:00
277b93cb89 Merge pull request #417 from tonnamb/add-pair-zhou
add new pair potential for metal-organic interactions - pair style momb
2017-03-24 09:41:30 -06:00
8820315ff9 Merge branch 'master' into updates-for-stable 2017-03-23 17:57:02 -04:00
44841f6891 fix ave/chunk fixes, 2d disc option, fix_modify dynamic/dof 2017-03-23 15:31:27 -06:00
2cdcd6d630 remove one more reference to xmovie 2017-03-23 16:03:25 -04:00
47cade2bcf re-arranged functions to make it easier to compare with non-threaded. port bugfixes to airebo to USER-OMP 2017-03-23 15:19:02 -04:00
a72efbea36 whitespace cleanup 2017-03-23 15:18:23 -04:00
5c9892c083 apply airebo/m bugfix also to USER-OMP version 2017-03-23 14:14:49 -04:00
9ecc5c8cf7 Merge branch 'fix-airebo-morse' of https://github.com/v0i0/lammps into pull-431 2017-03-23 14:12:37 -04:00
47cebb0d23 And getting it right... 2017-03-23 17:43:27 +01:00
f127e428cc Fix airebo/morse
Introduced in b3d2fb91, PCCf_2_0 does not get initialized in ::settings
in PairAIREBOMorse. Future proof by calling super-class.
2017-03-23 17:37:49 +01:00
568b67eee9 include citation for reference paper into pair style momb 2017-03-23 12:00:53 -04:00
865b41e201 make pair style momb example follow LAMMPS conventions more closely 2017-03-23 11:50:10 -04:00
b88a749680 rename a couple more references to pair style zhou into momb 2017-03-23 11:38:33 -04:00
02e65900e6 add example log file generated from 17Nov16 version of lammps, make minimize and run short in system.in 2017-03-23 11:03:00 -04:00
343c9eda82 change zhou to momb in src/USER-MISC/README 2017-03-23 10:24:13 -04:00
df8dbec676 rename pair_zhou to pair_momb in src and change class name from PairZhou to PairMomb 2017-03-23 10:22:49 -04:00
1075be7eca rename zhou to momb in examples 2017-03-23 10:18:15 -04:00
6d395ec511 change name zhou to momb in docs, fix grammar 2017-03-23 10:08:47 -04:00
bf560e78f3 edit description and add related commands and default 2017-03-22 16:56:40 -04:00
daae76c465 Add names Tonnam and Ya to README 2017-03-22 15:59:00 -04:00
1ea9a14121 Add Tonnam and Ya names 2017-03-22 15:55:34 -04:00
1db5834b99 Revert "Cleanup of a few more references to obsoleted and removed tools like xmovie"
This reverts commit 127597023d.
2017-03-22 15:12:49 -04:00
3070b043be Revert "correct inconsistent anchors"
This reverts commit a14d58259c.
2017-03-22 15:12:47 -04:00
ef3f323fc4 Revert "remove reference to removed section on VMD scripts"
This reverts commit 66eb9c2486.
2017-03-22 15:12:43 -04:00
43a304f564 remove reference to removed section on VMD scripts 2017-03-22 15:12:09 -04:00
a79aef65e8 correct inconsistent anchors 2017-03-22 15:12:09 -04:00
dc1d93a491 some more whitespace cleanup 2017-03-22 15:08:09 -04:00
66eb9c2486 remove reference to removed section on VMD scripts 2017-03-22 15:01:11 -04:00
a14d58259c correct inconsistent anchors 2017-03-22 15:00:57 -04:00
127597023d Cleanup of a few more references to obsoleted and removed tools like xmovie 2017-03-22 14:57:37 -04:00
3ec16f3630 fully integrate support for doc_anchor_check into docs makefile 2017-03-22 14:40:30 -04:00
cb9059652d a few more small changes to integrate pair style zhou properly 2017-03-22 14:39:46 -04:00
43f27250b5 Merge branch 'add-pair-zhou' of https://github.com/tonnamb/lammps into pull-417 2017-03-22 14:05:16 -04:00
af0b5b0e84 Removed dead code 2017-03-22 16:23:29 +00:00
c5d561a312 pair_zhou docs: add equation, add link in section_commands and pairs 2017-03-22 12:00:32 -04:00
7435084375 Verified oxDNA with modified nucleotide layout 2017-03-22 15:59:10 +00:00
734e639c5d correct typo reported on lammps-users 2017-03-21 14:12:00 -04:00
dcede304df changes for next patch, 2d disc options for spheres, fix external upgrade, bug fixes for fix ave/chunk for density calcs, Aidan doc page citation deconvolution 2017-03-21 08:56:37 -06:00
145e682ad3 Merge pull request #427 from akohlmey/small-updates-and-corrections
Various updates and corrections for upcoming stable release
2017-03-21 08:18:21 -06:00
6482df6c2f remove references to deleted tools. update/clarify section on restart2data 2017-03-20 18:57:30 -04:00
0c9cd11b4e have the relevant LAMMPS version embedded into top part of the html manual 2017-03-20 18:25:11 -04:00
82d952ae0e mention NumPy dependency instead of Numeric for python tools 2017-03-20 17:26:19 -04:00
47d6451d03 fix compilation for pymol_asphere tool 2017-03-20 17:18:24 -04:00
e110d6961a remove obsolete tools and files 2017-03-20 17:17:35 -04:00
a42b0b7dcb update colvars abf integrate tool from git repo 2017-03-20 17:04:16 -04:00
03828b5836 adapt binary2txt.cpp source to current coding conventions 2017-03-20 16:57:32 -04:00
3b44c3ff1d remove non-ASCII characters from doc source files 2017-03-20 16:55:14 -04:00
0d0c2b65f7 correct stan's email address 2017-03-20 16:32:16 -04:00
2218a9d704 emphasize that the online manual is following the latest development version 2017-03-20 16:32:04 -04:00
0a6b33cd78 remove duplicate paragraph in nose-hoover fix docs 2017-03-20 16:27:00 -04:00
ecf17621aa more permission fixes 2017-03-20 16:25:06 -04:00
f0c6ed004d remove xmovie 2017-03-20 16:24:38 -04:00
554531a302 update permissions 2017-03-20 13:51:36 -04:00
d496c0fdfa Merge pull request #426 from dstelter92/master
fix for temper_grem exchange probability
2017-03-20 08:57:29 -06:00
5c39dfd740 re-ran example with fixed exchanges 2017-03-20 09:22:09 -04:00
5b842f0010 Teff and exchange bugfix, as per Greg Dignon to match python examples 2017-03-20 09:15:48 -04:00
52987a3615 Started writing pair_zhou.txt 2017-03-18 22:32:39 -04:00
b6ecfb91c4 deleted pair_zhou in main/src (moved to USER-MISC) 2017-03-18 21:22:02 -04:00
d04ea8653d add examples for pair_zhou 2017-03-18 21:21:25 -04:00
2ab77caa8b adapt to LAMMPS coding style 2017-03-18 21:01:40 -04:00
da81531906 move pair_zhou to USER-MISC and update USER-MISC/README 2017-03-18 20:54:12 -04:00
5be32f5d8d remove pair_zhou from Makefile.list 2017-03-18 20:48:49 -04:00
4a90bca7a3 patch 17Mar17 2017-03-17 11:29:23 -06:00
9f35b764f8 Merge pull request #424 from timattox/dpd_restart_fix
Remove unneeded restart_peratom flags in USER-DPD package
2017-03-17 11:19:04 -06:00
7ca5dce2f5 Merge pull request #423 from timattox/master_bugfix_irregular
bugfix for irregular::create_atom and create_data
2017-03-17 11:18:52 -06:00
fcc3b3bd36 Merge pull request #421 from akohlmey/memory-output
improve memory usage reporting in info and output class
2017-03-17 11:18:08 -06:00
53a3877c3d Merge pull request #420 from rbberger/doc_anchor_check
Add utility to detect duplicate anchors in docs
2017-03-17 11:17:28 -06:00
a936b7b2ab Merge pull request #419 from rbberger/python_fixes
Library interface fixes, Python example fixes and better Python 3 compatibility
2017-03-17 11:16:58 -06:00
a91b851f3d Merge pull request #416 from lukin17/filter_corotate
Added fix filter/corotate.
2017-03-17 11:14:59 -06:00
d31c591b60 Remove unneeded restart_peratom flags 2017-03-17 09:40:39 -06:00
ae5ebf6001 add support for MPI_Request_free() to MPI STUBS library 2017-03-17 11:40:09 -04:00
7fb741d53d Revert "In irregular.cpp use simpler and slightly faster MPI_Reduce_scatter_block()"
This reverts commit 8e75616c14.
2017-03-17 11:35:59 -04:00
8e75616c14 In irregular.cpp use simpler and slightly faster MPI_Reduce_scatter_block() 2017-03-17 03:02:42 -04:00
411c069ba6 BUGFIX: Prevent possible deadlock in Irregular::create_atom and create_data 2017-03-17 03:02:19 -04:00
ac82d041cc ignore package pair style 2017-03-16 23:12:49 -04:00
621d7d5ce0 Correct off-by-one error in line number reported 2017-03-16 23:05:03 -04:00
1bb9c7da42 Remove some duplicate anchors in documentation 2017-03-16 22:36:13 -04:00
f893104b18 Add anchor_check to doc Makefile 2017-03-16 22:21:55 -04:00
efb2a942e0 Add utility to detect duplicate anchors in documentation files 2017-03-16 22:21:12 -04:00
070ce33a13 improve memory usage reporting in info and output class 2017-03-16 18:35:04 -04:00
f604f86cfc add fix filter/corotate to some administrative files 2017-03-16 15:08:17 -04:00
bed288339e simplify and shorten examples for fix filter/corotate and combine into a single folder 2017-03-16 15:02:50 -04:00
1995f434f3 fix some more code formatting issues, add newline at EOF 2017-03-16 14:24:28 -04:00
db0281b4df Merge branch 'filter_corotate' of https://github.com/lukin17/lammps into pull-416 2017-03-16 12:14:09 -04:00
2f5e711acd Merge remote-tracking branch 'upstream/master' into filter_corotate 2017-03-16 10:00:12 +01:00
bdb7669e27 Fixed coding style. 2017-03-16 09:44:07 +01:00
cda8213892 Added Python matplotlib plot example 2017-03-16 01:41:28 -04:00
ef940d226c Improve Python 3 compatibility of pizza tools and simplify read_snapshot code 2017-03-16 01:38:05 -04:00
36da9223ec Fix dump cfg in vizplotgui_atomeye.py example 2017-03-15 22:55:51 -04:00
eb29ef32b1 Fix space/tab error in pizza/gl.py 2017-03-15 22:43:00 -04:00
29550d472d Fix dump cfg in viz_atomeye.py example 2017-03-15 22:31:14 -04:00
79cae51156 Document property 'uses_exceptions' of Python interface 2017-03-15 22:20:30 -04:00
a210867025 Fixes lammps_create_atoms library function and its Python interface variant
The interface of that function has changed and includes two additional
parameters, which haven't been added to the Python interface either.
This showed up by trying to run the simple.py example.
2017-03-15 22:13:06 -04:00
0262a54ecf Fix Python 3 compatibility by encoding strings passed as c_char_p 2017-03-15 22:00:43 -04:00
0d8f74f0c5 Merge branch 'filter_corotate' of https://github.com/lukin17/lammps into pull-416 2017-03-15 18:54:41 -04:00
3a2da51a82 Merge pull request #413 from ohenrich/user-cgdna
User cgdna
2017-03-15 13:12:43 -06:00
b1c59126f7 Merge pull request #415 from stanmoore1/kk_qeq
Add neigh/qeq option to Kokkos package
2017-03-15 13:12:08 -06:00
4c77838514 Merge pull request #414 from sstrong99/flow-gauss-doc-addition
flow/gauss documentation update
2017-03-15 13:11:26 -06:00
f9468f46f5 Merge pull request #412 from timattox/master_typofix
Correct a typo in the fix_halt.txt documentation.
2017-03-15 13:10:58 -06:00
ec1778b586 add pair_zhou 2017-03-15 11:10:04 -04:00
c3ce3747e0 Added fix filter/corotate. 2017-03-15 11:34:01 +01:00
fdc390ad05 Tweaking docs for Kokkos package 2017-03-14 14:08:14 -06:00
580f6b567b Add neigh/qeq option to Kokkos 2017-03-14 10:44:31 -06:00
27b1c33a16 updated the NEMD discussion in the how-to documentation about flow/gauss 2017-03-14 10:39:06 -06:00
7a75cd111c Minor updates in documentation and setup tool, merge before upgrade to oxDNA2 2017-03-14 11:39:09 +00:00
23b8287933 Updated documentation and simple setup tool 2017-03-14 11:36:44 +00:00
4cfe623bc1 Correct a typo in the fix_halt.txt documentation. 2017-03-10 21:30:03 -05:00
a89246fbfc Merge branch 'master' into coulomb-refactoring 2017-03-10 20:56:40 -05:00
f871ecdc67 change to RCB cuts in load-balancing commands, also a new option for fix halt 2017-03-10 15:55:07 -07:00
470353e320 Merge pull request #408 from giacomofiorin/colvars-update-2017-03-10
Colvars update 2017-03-10
2017-03-10 14:51:16 -07:00
ffe02d20ca Merge pull request #406 from stanmoore1/kokkos_bugfix
Fix Kokkos issues
2017-03-10 14:51:04 -07:00
f70752c18f Include PDF of Colvars doc missing in previous commit 2017-03-10 15:58:35 -05:00
07fcfd6d54 Merge pull request #405 from stanmoore1/ev_setup_kk
Add alloc flag to ev_setup
2017-03-10 11:01:51 -07:00
c97feafca6 Merge pull request #407 from frobnitzem/master
Add error check to lammps_gather_atoms/lammps_scatter_atoms in library.cpp
2017-03-10 11:00:30 -07:00
b20d95d495 Merge pull request #402 from timattox/USER-DPD_spelling
Fix spelling "correction" from 3a054d1a: iterations not interactions and imd_writen not imd_written
2017-03-10 10:59:43 -07:00
0b4adaa9e6 Backport typo fixes that were not previously pushed to the Colvars repository 2017-03-10 09:24:46 -05:00
5fe6206638 Update Colvars module to version 2017-03-10 2017-03-10 09:16:58 -05:00
65964f3b31 Add error check to lammps_gather_atoms/lammps_scatter_atoms in library.cpp 2017-03-09 16:49:07 -05:00
b28b84d444 Fix half from full nlist issue with Kokkos 2017-03-09 14:00:27 -07:00
a001a5ceb0 Fixing memory overflow issue in comm_kokkos 2017-03-09 12:20:49 -07:00
2ef713ea1b restore incorrect change due to spell checking in fix imd 2017-03-08 16:40:16 -05:00
1f6c1942b3 Disable allocation of per-atom arrays in ev_setup for Kokkos styles 2017-03-08 12:42:44 -07:00
683023d820 Adding alloc flag to ev_setup 2017-03-08 12:36:23 -07:00
42d3a8f498 Fix spelling "correction" from 3a054d1a: iterations not interactions. :-) 2017-03-07 15:41:06 -05:00
f739a94eeb Merge branch 'master' into coulomb-refactoring 2017-03-07 14:31:19 -05:00
79b005dc3d patch 7Mar17 2017-03-07 11:40:07 -07:00
a2fa6ef452 Merge pull request #393 from akohlmey/small-bugfixes
Small bugfixes
2017-03-07 09:56:03 -07:00
920641bbff Merge pull request #399 from rbberger/docs_spelling_fixes
Correct spelling errors in documentation
2017-03-07 09:47:22 -07:00
c2aabdec22 Merge pull request #398 from stanmoore1/kokkos_changes
Kokkos changes
2017-03-07 09:46:54 -07:00
e4aa735a68 Merge pull request #395 from timattox/USER-DPD_bugfix
USER-DPD: a variety of small but important bugfixes
2017-03-07 09:46:40 -07:00
4af6557568 Merge pull request #394 from jaapkroe/kolmogorov-crespi
Added Kolmogorov-Crespi potential
2017-03-07 09:46:08 -07:00
0798885bdb Merge pull request #389 from akohlmey/update-agni-potential
update AGNI potential for Al, reference runs and output and citation
2017-03-07 09:35:31 -07:00
020e75e7ef Merge pull request #386 from akohlmey/doc-consistentcy
improve consistency of manual
2017-03-07 09:33:14 -07:00
d6866f1cfd Merge pull request #376 from v0i0/airebo-bondorderLJ-fixes
Fixes for PairAIREBO::bondorderLJ
2017-03-07 09:32:30 -07:00
efaa4c6710 new neigh_modify exclude option, other SNAP changes 2017-03-07 09:31:12 -07:00
08baaa9d8e Fix more typos in tools 2017-03-07 01:00:25 -05:00
359af419a7 Fix typo in python README 2017-03-07 00:58:35 -05:00
21be86c423 Fix typos in txt2html 2017-03-07 00:58:03 -05:00
d6800405a5 Fix more typos in examples 2017-03-07 00:57:23 -05:00
3a054d1a82 Fix more typos in src files 2017-03-07 00:55:01 -05:00
007f3c66a0 Third batch of spelling fixes in manual 2017-03-07 00:51:31 -05:00
32708860a9 Add remaining false positives 2017-03-07 00:27:35 -05:00
fc9eebb936 Added spellcheck utility to documentation build
Uses the sphinxcontrib-spelling extension and requires PyEnchant and
aspell-en to be installed.

Adds the optional make target 'spelling' which produces the file
spelling/output.txt. It contains all words it detects.

Due to the large number of false positives, words in
utils/sphinx-config/false_positives.txt are ignored.
2017-03-05 21:23:41 -05:00
dd76ac5010 Fix typos in tools folder 2017-03-05 21:18:01 -05:00
17486a9319 Convert USER/lb/polymer files to UNIX line endings and remove trailing whitespace 2017-03-05 21:16:21 -05:00
778a79b8ee Fix typos in examples folder 2017-03-05 21:10:33 -05:00
7dd60f9737 Fix typos in src files 2017-03-05 21:03:40 -05:00
084d831bce Second batch of spelling fixes in manual 2017-03-05 21:02:51 -05:00
e261bef7bb Spelling fixes in source files 2017-03-05 18:30:39 -05:00
fd78486086 First batch of spelling fixes in manual 2017-03-05 18:27:38 -05:00
6382d3c89a Improving memory access in comm_kokkos 2017-03-03 09:14:47 -07:00
763a00e8b0 USER-DPD: pair_multi_lucy_rx bugfix for systems with multiple atom types 2017-03-03 09:29:17 -05:00
ce1a3f25e1 Merge branch 'pair_write_fix' of https://github.com/andeplane/lammps into small-bugfixes 2017-03-03 08:11:55 -05:00
eaf7ed7707 Print error if pair_write does not get correct number of arguments 2017-03-02 21:25:27 -08:00
9a560b9091 USER-DPD bugfix: make atom_vec_dpd work properly with atom_vec_hybrid.
We were sending too much data during pack_comm_hybrid/unpack_comm_hybrid.
2017-03-01 15:22:28 -05:00
8a0e44db83 updated documentation and ev_tally 2017-03-01 16:13:44 +01:00
1dc78a7e58 USER-DPD: correct off-by-one errors in PairMultiLucyRX::coeff() 2017-02-28 17:45:21 -05:00
7a593c2fc8 USER-DPD: correct off-by-one errors in PairTableRX::coeff() 2017-02-28 14:25:03 -05:00
9d8d88d020 Merge branch 'master' into coulomb-refactoring 2017-02-28 12:15:31 -05:00
3ac74a1d69 update lammps.book file for latest doc changes 2017-02-28 11:21:18 -05:00
3605208a45 add a few more missing details for integrating pair style kolmogorov/crespi/z 2017-02-28 11:16:27 -05:00
9b01949cac make the introduction of the command-by-category list less confusing 2017-02-28 11:05:40 -05:00
323570c920 added jpg for kolmogorov-crespi-z equations and fixed hybrid/overlay check in source 2017-02-28 15:39:01 +01:00
df13a7a003 email added 2017-02-28 15:12:35 +01:00
a1b40b902d Added Kolmogorov-Crespi potential 2017-02-28 14:59:13 +01:00
b921b69f47 implement bugfix from issue #388
this closes #388
2017-02-27 18:22:21 -05:00
c0cf50bce5 trigger recomputing ichunk between runs unless requested otherwise
this fixes #390
2017-02-27 18:19:59 -05:00
2708c86836 fix typos: moleclue -> molecule
this closes #386
2017-02-27 18:03:18 -05:00
9999f363a1 remove outdated log files, too. 2017-02-24 15:34:59 -05:00
a18b4ef4b0 update AGNI potential for Al, reference runs and output and citation 2017-02-24 15:33:13 -05:00
3626496c7c Corrected comment in 3' to 5' directionality check 2017-02-22 20:06:49 +00:00
458b6749e7 Corrected comment in 3' to 5' directionality check. 2017-02-22 20:03:41 +00:00
20a9ffe69d improve consistency and resolve dead links for USER-CGDNA related doc files 2017-02-21 21:27:34 -05:00
49e83b4348 patch 21Feb17 sync with GHub 2017-02-21 16:07:26 -07:00
6e89ccd522 Merge pull request #385 from akohlmey/collected-small-bugfixes
collected small bugfixes and updates
2017-02-21 15:59:06 -07:00
53f3df5bfc Merge pull request #384 from lammps/another_neigh_refactor
more neighbor list changes, some new options
2017-02-21 15:57:23 -07:00
3dbbea342a remove a debug print line 2017-02-21 15:57:03 -07:00
b70c670aac Merge pull request #383 from stanmoore1/rshan_class2_kk
Kokkos version of class2 bond, angle, dihedral, and improper from Ray Shan
2017-02-21 15:52:10 -07:00
1d17cae407 Merge pull request #382 from timattox/master_kokkos_neigh_bugfix
neighbor_kokkos.cpp: Don't call grow() on neighbor lists that are copies
2017-02-21 15:51:35 -07:00
429264a12b Merge pull request #380 from hheenen/core_shell_documentation
updated documentation and examples for coreshell
2017-02-21 15:50:53 -07:00
d001a09345 Merge pull request #379 from ndtrung81/pppm-gpu-compute-group-group
Fixed bugs with pppm/gpu when used with compute group/group
2017-02-21 15:50:28 -07:00
cb9d42da08 Merge pull request #378 from timattox/USER-DPD_ssa_update
USER-DPD: performance optimizations to ssa_update() in fix_shardlow
2017-02-21 15:50:07 -07:00
7185ec92b3 Merge pull request #377 from stanmoore1/kokkos_update
Kokkos library update
2017-02-21 15:49:50 -07:00
1cd4c48ccc new SNAP potential for W 2017-02-21 15:49:21 -07:00
a88136c3f5 correct a logic bug in fix wall/gran/region 2017-02-17 17:58:24 -05:00
ce20c7ffe9 remove debug code 2017-02-17 12:42:07 -05:00
4a80df3a99 more neighbor list changes, some new options 2017-02-15 16:45:33 -07:00
5f93fad012 Add copymode protection to class2 styles 2017-02-15 13:56:16 -07:00
ccaec315db Updating docs for Kokkos class2 2017-02-15 13:00:33 -07:00
c6c1852b3b Fix a few issues with Kokkos class2 files 2017-02-15 12:44:54 -07:00
69a8e19dc5 Add files from Ray Shan for Kokkos version of class2 angle, bond, etc. 2017-02-15 12:29:52 -07:00
928947dcea neighbor_kokkos.cpp: Don't call grow() on neighbor lists that are copies.
This corresponds to a bugfix from commit 9161bd98 on neighbor.cpp
2017-02-15 11:49:34 -05:00
904609a7a3 Fixed issue with switching function derivative in PairAIREBO::FLJ
Since we compute dvdw as d vdw / d rij, we have to also compute
dslw as d slw / d rij. Currently, we compute -1/r d slw/d rij,
which leads to incorrect results when the two are later combined.
Alternatively, one could also modify dvdw to be -1/r d vdw/d rij,
which would be a more standard way to do LJ calculations, but this
way seems more consistent.
2017-02-15 16:38:13 +01:00
fc3505fac4 Fixed a number of issues after verifying against the KIM version 2017-02-15 16:37:29 +01:00
48070011d9 update names in example, too 2017-02-14 07:42:36 -05:00
0fb8dacc00 one more Finchham to Fincham change 2017-02-14 07:41:05 -05:00
6b923476b9 updated documentation and examples for coreshell 2017-02-14 13:14:22 +01:00
20806dd86a Fixed bugs with pppm/gpu when used with compute group/group 2017-02-14 00:26:55 -06:00
90e5ae965d Add missing flags to Kokkos Makefile 2017-02-13 11:19:46 -07:00
15008c9d18 USER-DPD: performance optimizations to ssa_update() in fix_shardlow
Overall improvements range from 2% to 18% on our benchmarks
1) Newton has to be turned on for SSA, so remove those conditionals
2) Rework the math in ssa_update() to eliminate many ops and temporaries
3) Split ssa_update() into two versions, based on DPD vs. DPDE
4) Reorder code in ssa_update_*() to reduce register pressure
2017-02-13 13:11:19 -05:00
33af7ab248 Remove merge line 2017-02-13 10:59:22 -07:00
8f9b2aca06 Removing unused files in Kokkos lib 2017-02-13 10:53:51 -07:00
383da816c2 Updating Kokkos lib 2017-02-13 10:50:34 -07:00
a323ca1edd Moved variable declarations to front for consistency 2017-02-13 18:11:09 +01:00
de4af6f15d In PairAIREBO::bondorderLJ correct omega sum d/drij.
The code tries to make this distinction between the real distance (r23) and the facticious one (rij), but does not do so very well.
It is better if those two variables have the same value everywhere, and apply the correction where necessary.
The current way to use the values is incorrrect.

Remove those calculations that effectively are derivatives w.r.t. |rij| (the facticious distance), is constant and thus the chained derivative (d|rij|/dRij) is always zero.

Apply the corrections due to drij/dRij in the sum omega term.
2017-02-13 18:11:09 +01:00
0e16dc3ead In PairAIREBO::bondorderLJ: p^sigma pi account for d/drij derivatives.
The bonderorderLJ function operates on a facticious distance |rij|, i.e. everything gets calculated "as if" atoms i and j were a given distance alpha apart.
Mathematically, bondorderLJ is a function of rij (a vector), that is (in terms of the real distance Rij) rij = alpha * Rij/|Rij|.
When we calculate the forces in bondorderLJ, we have to make sure to chain in this derivative whenever we calculate derivatives w.r.t. rij.
The right correction, as it turns our, is Fij = alpha / |Rij| * (Identity(3,3) - Rij * Rij^T / |Rij|^2) * fij.
This commit only fixes this for the p_ij^sigma pi terms, which were modified to separate out the d/drij derivative in the cosine calculation.
Now, derivatives are taken w.r.t. the connecting edges instead of the edge points.
2017-02-13 18:11:01 +01:00
1b3f6e257a In PairAIREBO::bondorderLJ only compute torsion term once.
Since Etmp (representing sum_kijl omega_kijl * w_ik * w_jl) is not reset between the forward and reverse pass, the value used by later calculation will be twice the expected values.
One could instead reset Etmp between these passes, but there really is no reason to calculate it twice.
2017-02-13 17:14:52 +01:00
cb982f2f28 sync 13Feb17 patch back to GH 2017-02-13 09:05:03 -07:00
4843296d4e Merge pull request #372 from akohlmey/fft-cleanup
simplify FFT3d code by removing support for outdated FFT libraries
2017-02-13 08:53:13 -07:00
2bdda8f6c0 patch 12Feb17 - change int to tagint for compute group/group 2017-02-13 08:40:54 -07:00
0068ef5616 added molecule option to compute group/group command 2017-02-10 09:25:32 -07:00
02b0e6cc55 Merge pull request #375 from akohlmey/small-updates-and-fixes
Small updates and fixes
2017-02-10 09:23:51 -07:00
fbb24c2406 Merge pull request #374 from agiliopadua/master
Updated polarizer.py in USER-DRUDE to use coul/long/cs
2017-02-10 09:22:22 -07:00
0efd209480 Merge branch 'master' into user-cgdna 2017-02-09 11:50:03 +00:00
a5f830c40c fix typo
(cherry picked from commit 6410797697)
2017-02-08 14:33:45 -05:00
8c074a363a Merge branch 'master' into small-updates-and-fixes 2017-02-08 14:32:44 -05:00
6410797697 fix typo 2017-02-08 14:31:11 -05:00
27aca14094 Updated polarizer.py to use coul/long/cs 2017-02-04 15:02:08 +01:00
0898ffe336 Merge branch 'master' into coulomb-refactoring 2017-02-03 18:30:34 -05:00
191453e1c7 Merge branch 'master' into fft-cleanup 2017-02-03 16:53:10 -05:00
207adc3968 Merge pull request #373 from stanmoore1/kk_more_bugfixes
Fixing Kokkos per-atom energy/virial issues
2017-02-03 14:45:31 -07:00
84c517159d Merge pull request #368 from Pakketeretet2/kokkos_morse
Kokkos morse
2017-02-03 14:45:07 -07:00
6ca377436f Merge pull request #366 from rbberger/kokkos_lammps_bigbig_fix
Fix data type of molecule array in npair_kokkos.h
2017-02-03 14:43:33 -07:00
dc34a32602 Merge pull request #362 from ibaned/warnings2
fix Kokkos+kspace warnings
2017-02-03 14:43:12 -07:00
d84ffc5309 Adding dp erfc approximation to pair *coul/long/kk 2017-02-03 08:44:46 -07:00
067119f6c6 Adding missing friend statement to pair_lj_class2_coul_cut_kokkos 2017-02-02 15:21:30 -07:00
1834a5e46c Fixing more Kokkos per-atom and fdotr issues 2017-02-02 15:21:21 -07:00
6a4918b39a Fixing typo in pair_buck_coul_cut_kokkos 2017-02-02 15:21:05 -07:00
5da0d39392 Fixing fdotr in pair_buck_coul_cut_kokkos 2017-02-02 13:35:51 -07:00
6f92429602 Fixing per-atom ev issue 2017-02-02 13:34:27 -07:00
38e0e4bb69 Add missing typedef in Kokkos pair styles 2017-02-02 13:24:05 -07:00
daf9f95381 Fixing Kokkos per-atom e/v issue 2017-02-02 13:09:52 -07:00
6595fde0a1 explain in more detail the handling of error checking for numerical inputs 2017-02-02 11:58:12 -05:00
6bcec9c61d Merge pull request #2 from stanmoore1/kk_tag_bugfixes
Fixing tagint and imageint issues in Kokkos package
2017-02-02 08:57:21 -05:00
9d1991bf84 remove support for obsolete legacy FFT libraries and point -DFFT_FFTW to FFTW3 2017-02-02 08:10:23 -05:00
0a87b7443a Updated contributing authors and docs 2017-02-02 13:42:47 +01:00
124bd99751 dead code removal 2017-02-02 00:39:59 -05:00
85a24bda21 remove dead code 2017-02-01 23:59:48 -05:00
d759949d03 permission fixup for potential files 2017-02-01 23:40:13 -05:00
25904e80f0 permission cleanup 2017-02-01 17:49:59 -05:00
cfb2353313 Merge pull request #321 from akohlmey/improve-coulomb-table-accuracy
Improve lookup table accuracy
2017-02-01 17:43:19 -05:00
bd49f4d665 Merge branch 'master' into improve-coulomb-table-accuracy 2017-02-01 17:40:57 -05:00
b2ef952187 convert coul/dsf/omp styles to use fast analytical erfc() 2017-02-01 17:24:53 -05:00
381d87b79b convert pair styles in USER-OMP to use fast DP analytical coulomb 2017-02-01 17:24:53 -05:00
8778452eaf convert a few more styles to use fast full DP erfc() 2017-02-01 17:24:11 -05:00
6ae15d0801 first batch of pair styles converted to double precision erfc() 2017-02-01 17:23:27 -05:00
2826449b52 set up analytical long-range coulomb to have double precision accuracy 2017-02-01 17:20:47 -05:00
7ee45ec5f3 Fixing tagint and imageint issues in Kokkos package 2017-02-01 11:52:27 -07:00
d4c9e2500b Ported Morse to KOKKOS 2017-02-01 17:45:21 +01:00
6232073d3b Removed traces of pair morse/kk 2017-02-01 17:39:37 +01:00
ed59193d13 Removed traces of pair morse/kk 2017-02-01 17:39:06 +01:00
67bed8e853 Merge pull request #1 from akohlmey/tagint-issue
Fix additional tagint issue in fix qeq/reax/kk
2017-01-31 18:34:35 -05:00
bcb1d94b9a silence compiler warning about dead code 2017-01-31 18:28:04 -05:00
fbe30b5683 correct issue with compiling for -DLAMMPS_BIGBIG in fix qeq/reax/kk 2017-01-31 18:13:44 -05:00
9ef55fedf7 Merge branch 'kokkos_lammps_bigbig_fix' of https://github.com/rbberger/lammps into tagint-issue 2017-01-31 17:23:51 -05:00
997142a4c1 Merge pull request #364 from stanmoore1/kk_triclinic_neighlist
Add triclinic neighbor list support to Kokkos
2017-01-30 07:27:02 -07:00
033b07fdb7 Merge pull request #363 from ibaned/obey-datamask
Fix GPU sync bugs
2017-01-30 07:26:49 -07:00
ed0a347fbf Merge branch 'master' into user-cgdna 2017-01-30 10:31:50 +00:00
51a0b6b445 Fix data type of molecule array in npair_kokkos.h
This showed up when trying to compile with -DLAMMPS_BIGBIG.
Fixes issue #365
2017-01-28 07:49:08 -05:00
59f4a77dd5 Whitespace change to npair_kokkos 2017-01-27 15:17:39 -07:00
579cc6d7aa More tweaks to npair_kokkos for triclinic 2017-01-27 15:13:37 -07:00
5afd3e995b Adding support to npair_kokkos for triclinic-newton-on neighborlists 2017-01-27 14:18:01 -07:00
2a6f5e651c more preference of datamask over custom sync
see commit 09fc8b0 for details on why
2017-01-27 09:35:55 -07:00
09fc8b0bd7 kspace & dihedral can't do their own sync/modify
because the verlet_kokkos system has
a "clever" optimization which will
alter the datamasks before calling sync/modify,
so the datamask framework must be
strictly obeyed for GPU correctness.
(the optimization is to concurrently
compute forces on the host and GPU,
and add them up at the end of an iteration.
calling your own sync will overwrite
the partial GPU forces with the
partial host forces).
2017-01-27 08:39:55 -07:00
e5d0bde783 pppm_kokkos: remove useless statement 2017-01-27 08:35:37 -07:00
9daf7fb650 pppm_kokkos: don't shadow member variables 2017-01-27 08:35:37 -07:00
b5d622c6a3 pppm_kokkos: remove unused variables 2017-01-27 08:35:37 -07:00
2023fa28e0 consistent #ifdefs for fft3d variable (2)
this variable is only used when FFTW3
is enabled, so its declaration and
initialization should be protected
under the same conditions to avoid
compiler warnings
2017-01-27 08:35:37 -07:00
5b29515849 fft3d: use C++ loop declarations
the variable (offset) is only
used in a subset of numerous
scenarios with #ifdef, it seems
better just to have each loop
declare it as needed.
(avoids compiler warnings)
2017-01-27 08:35:37 -07:00
5b18421dd2 fft3d : remove unused variables 2017-01-27 08:35:37 -07:00
cf95ea0709 fft3d: only declare variables when used
avoids compiler warnings
2017-01-27 08:35:36 -07:00
6a74a81da0 consistent #ifdefs for fft3d variable
this variable is only used when FFTW3
is enabled, so its declaration and
initialization should be protected
under the same conditions to avoid
compiler warnings
2017-01-27 08:35:36 -07:00
f0a4ed615d add missing KOKKOS_INLINE_FUNCTION for params 2017-01-27 08:35:36 -07:00
cfe818a175 remove unused variables from fix_cmap 2017-01-27 08:35:36 -07:00
f8506fee23 sync GHub with SVN 2017-01-26 14:06:43 -07:00
18e5584311 Merge pull request #354 from stanmoore1/kokkos_bugfixes
Kokkos bugfixes
2017-01-26 13:51:47 -07:00
851f80464f Merge pull request #361 from akohlmey/user-omp-fix-per-atom-data
fix USER-OMP bug on per-atom data with hybrid styles
2017-01-26 13:50:13 -07:00
5971d4c994 Merge pull request #358 from ibaned/warnings
warning fixes (Kokkos+CUDA)
2017-01-26 13:49:56 -07:00
868d95f0a5 Merge pull request #352 from akohlmey/fix-skip-with-ghost-issue
Fix skip with ghost issue
2017-01-26 13:47:12 -07:00
a5ff35435a Merge pull request #351 from timattox/USER-DPD_pair_exp6_bugfix
USER-DPD: Possible uninitialized variable in pair_exp6_rx.cpp bugfix.
2017-01-26 13:45:45 -07:00
8b7bd9d88e fix bug where per atom data for USER-OMP was reducing the wrong arrays with hybrid styles 2017-01-26 14:59:10 -05:00
149f37e764 Corrected reference to Fig.1 2017-01-26 19:08:59 +00:00
672bbbe494 add more missing KOKKOS_INLINE_FUNCTION attributes 2017-01-25 16:03:11 -07:00
03c9c46533 add missing KOKKOS_INLINE_FUNCTION attributes 2017-01-25 15:49:05 -07:00
e992bfe510 remove unused variable 2017-01-25 15:40:52 -07:00
053ee54a27 remove unused variable 2017-01-25 15:38:41 -07:00
1074c6734b add missing return keywords 2017-01-25 15:37:27 -07:00
60b48c9d66 add missing KOKKOS_INLINE_FUNCTION attributes
this structure gets put inside a DualView,
so these members need to be able to execute
on the GPU
2017-01-25 15:36:24 -07:00
3d40b51708 remove unused variable 2017-01-25 15:24:52 -07:00
effbe18c46 fix domain boundary indexing
the compiler pointed out that
boundary[2][2] doesn't exist.
If I understand this correctly,
those checks should be against
boundary[*][0].
2017-01-25 15:24:01 -07:00
6328beb7d7 fix double-return warning
this #ifdef adds a return statement
for little endian machines, but leaves
the old one, which the compiler comlains
is unreachable. this commit combines
the conditionals so we can use #else
2017-01-25 15:22:42 -07:00
26c8d3d98f Fixing GPU memory issue in fix_langevin_kokkos 2017-01-25 12:53:55 -07:00
73177d650d Fixing GPU memory issue in domain_kokkos 2017-01-25 11:18:03 -07:00
b5cb74bd33 skip list build is compatible with NP_GHOST 2017-01-23 19:21:48 -05:00
31976d1dee skip list definition was missing NP_HALFFULL flag 2017-01-23 19:20:05 -05:00
c8260af37c Possible uninitialized variable in USER-DPD/pair_exp6_rx.cpp bugfix.
Added explicit initialization (to zero) for several variables inside the
inner j-loop to avoid using them uninitialized or from prior iterations
within rmOldij_12 == 0.
2017-01-23 13:34:51 -05:00
caea8973a3 add neighbor list kind output to screen 2017-01-20 13:24:09 -07:00
aa0ad9b483 Merge pull request #349 from akohlmey/collected-small-fixes
collected fixes and improvements
2017-01-20 13:19:43 -07:00
5d0e4e1ba9 Merge pull request #346 from stanmoore1/kokkos_fixes
Kokkos fixes
2017-01-20 13:15:16 -07:00
f8d3c4c740 Merge pull request #345 from timattox/USER-DPD_another_zero_compute
USER-DPD another zero compute optimization
2017-01-20 13:14:59 -07:00
e6996121d1 remove dead code 2017-01-20 14:30:46 -05:00
fbfb1df5eb fix typo causing wrong neighbor list copy selections 2017-01-19 20:47:10 -05:00
9a299875da simplified neighbor list copying to avoid possible same-timestep re-build issues 2017-01-19 17:01:15 -07:00
fc94f1bd18 Fixing GPU memory issues in Kokkos 2017-01-19 12:14:25 -07:00
5ce8e2fbae Fixing GPU memory issue in modify_kokkos, need to cherry pick back to Master 2017-01-19 12:13:48 -07:00
f6cd98636b USER-DPD: Also apply "check if a0 is zero" optimization to pair_dpd_fdt
This relates to commit 4eb08a5822 that was applied to pair_dpd_fdt_energy
2017-01-18 16:17:11 -05:00
05cafb716f USER-DPD: cleanup initialization of splitFDT_flag in pair_dpd_fdt.cpp 2017-01-18 15:51:50 -05:00
3af4b3c28c Merge pull request #337 from ohenrich/user-cgdna
Added source code and documentation for USER-CGDNA
2017-01-18 11:31:35 -07:00
7fc0970587 Merge pull request #344 from timattox/USER-DPD_zero_compute
USER-DPD: Skip a0*stuff computations, if a0 was set to zero in pair_coeff
2017-01-18 11:31:14 -07:00
93262b52b4 Merge pull request #343 from timattox/USER-DPD_bugfix_molecule
USER-DPD: bugfix for a segfault when using MOLECULE and DPD together.
2017-01-18 11:30:58 -07:00
4eb08a5822 USER-DPD: Skip a0*stuff computations, if a0 was set to zero in pair_coeff.
This saves around 10% of the runtime for many of our tests using SSA.
2017-01-17 15:55:39 -05:00
01609f55e2 USER-DPD: bugfix for a segfault when using MOLECULE and DPD together. 2017-01-17 12:47:59 -05:00
d2fc88a626 patch 17Jan17 2017-01-17 10:14:53 -07:00
c52a26382f Merge pull request #339 from akohlmey/fixes-for-srp-example
Fixes for srp example
2017-01-17 09:36:28 -07:00
ad4d299975 Merge pull request #335 from stanmoore1/neighbor_fixes
Neighbor fixes
2017-01-17 09:33:25 -07:00
83408b195f Merge pull request #342 from epfl-cosmo/ipi-multiinit-bug
Bugfix in the fix_ipi initialization - prevents multiple open_socket calls
2017-01-17 09:14:03 -07:00
cd7bdf9251 Merge pull request #341 from stanmoore1/qeq_kk_neighlist
Make fix_qeq_reax_kokkos request its own neighbor list
2017-01-17 09:13:47 -07:00
8c5b108900 Merge pull request #340 from stanmoore1/fix_rx_neighborlist
Make fix_rx request its own neighbor list
2017-01-17 09:13:27 -07:00
c19d2011bb Merge pull request #334 from sstrong99/flow_gauss_changeRef
Updated the reference for the flow/gauss method
2017-01-17 09:12:22 -07:00
973bef4d45 Merge pull request #332 from akohlmey/coord-atom-orientorder-atom-enhancements
Coord atom orientorder atom enhancements
2017-01-17 09:11:45 -07:00
1b9e50c8cb Merge pull request #331 from timattox/USER-DPD_fix_example_typo
USER-DPD: fix a typo in the DPD-H example input; update reference output.
2017-01-17 09:08:14 -07:00
252e07e083 Merge pull request #330 from akohlmey/collected-small-bugfixes
Collected small bugfixes
2017-01-17 09:08:00 -07:00
74a661ae26 Merge pull request #328 from akohlmey/print-last-command-on-error
print the last input line, when error->all() is called
2017-01-17 09:05:19 -07:00
d8bc590aaf Merge pull request #327 from stanmoore1/kokkos_lib_update
Updating Kokkos lib
2017-01-17 09:04:12 -07:00
c9bea60710 Merge pull request #326 from Pakketeretet2/github-tutorial-update
Updated images of succesful merge.
2017-01-17 09:03:46 -07:00
5cd856c97f fix spring doc page update 2017-01-17 09:02:56 -07:00
2f13365cf5 avoid spurious error message, when no storage fix is active/used 2017-01-16 17:08:00 -05:00
0a2b78acb8 rather than adjusting the communication cutoff, we just print out the minimum value needed and error out
i suspect, this communication cutoff adjustment was included into the code before it was possible to separately set it via comm_modify. stopping with an error message printing the needed/current value is cleaner, in keeping with other modules in LAMMPS and much less problematic.
2017-01-16 15:47:02 -05:00
3f46b6d782 fix bugs from incorrect code synchronization 2017-01-16 11:15:54 -05:00
5abd6e5122 reordering operations in Pair::init_style() to avoid segfaults w/o a kspace style 2017-01-16 11:08:48 -05:00
f3a82f454e Included a flag to prevent multiple open_socket calls if run is included multiple times in the LAMMPS input 2017-01-16 08:42:23 +01:00
473a3ebeef fix for bug with compute rdf with pair reax/c. we must not copy a neighbor list, if newton settings are not compatible
an alternate route to address this issue would be to allow an "ANY" setting for neighbor list requests and then query the neighbor list for newton setting instead of the force class.
2017-01-15 12:05:19 -05:00
b220850377 Removing neighbor list hack in fix_qeq_reax_kokkos 2017-01-14 16:16:02 -07:00
fa00e0593f Make fix_rx request its own neighbor list 2017-01-14 15:39:37 -07:00
4a09399dc6 during setup, checking timestep doesn't seem to be sufficient. comparing bins and stencil point, too.
in addition, relevant pointers were not properly initialized to NULL
2017-01-14 17:13:22 -05:00
5821fe8dd5 correct out-of-bounds accesses 2017-01-14 17:06:23 -05:00
8360e70f4e update USER-CGDNA examples to follow LAMMPS style 2017-01-13 18:56:45 -05:00
b988b29413 remove dead code 2017-01-13 18:43:35 -05:00
5d48bfdcab USER-CGDNA whitespace cleanup: expand tabs and remove trailing whitespace 2017-01-13 18:40:34 -05:00
fe8caa8a56 apply some LAMMPS formatting style conventions for include files 2017-01-13 18:33:32 -05:00
afaacc6173 add USER-CGDNA package with dependencies into the build system 2017-01-13 18:32:32 -05:00
98ceb6feb1 add missing html files to lammps.book 2017-01-13 18:11:23 -05:00
374abea0f0 some minor documentation integration tweaks for USER-CGDNA package 2017-01-13 18:09:45 -05:00
61cff85435 avoid not only division by zero, but also computing variance for short runs with insufficient resolution 2017-01-13 14:35:35 -05:00
aa0b327f7e Merge branch 'bugfix_dividebyzero' of https://github.com/timattox/lammps_USER-DPD into collected-small-bugfixes 2017-01-13 14:26:10 -05:00
04fe071968 Merge pull request #6 from ibaned/cuda-lj-ctor-warning
fix a CUDA constructor warning
2017-01-13 12:13:43 -07:00
78498715b4 Protect from divide by zero in mpi_timings() when printing results.
e.g. If neighbor list(s) are never rebuilt, the Neigh time will be zero.
2017-01-13 13:32:15 -05:00
96259ea2d2 Added source code and documentation for USER-CGDNA 2017-01-13 13:36:54 +00:00
b2f67fea30 Merge branch 'collected-small-bugfixes' of github.com:akohlmey/lammps into collected-small-bugfixes 2017-01-13 08:12:10 -05:00
c59bcf31d1 change $MKLROOT to $(MKLROOT) as reported by @WeiLiPenguin
This closes #336
2017-01-13 08:10:51 -05:00
2540fc281c Merge branch 'flow_gauss_changeRef' of github.com:sstrong99/lammps into pull-334 2017-01-12 23:54:52 -05:00
e8e03dd440 Updated the reference for the flow/gauss method, the new reference is much more comprehensive 2017-01-12 23:44:33 -05:00
daf766d4f8 Fixing Kokkos neighbor bug 2017-01-12 16:22:38 -07:00
630783c8e8 Fixing neighbor bug 2017-01-12 16:22:24 -07:00
c94030d966 put pair_lj_coul in kokkos_type.h
also rename pair_lj_coul_gromacs
so it doesn't conflict with the
one now in kokkos_type.h
2017-01-12 13:37:53 -07:00
1229f6f60b Updated the reference for the flow/gauss method, the new reference is much more comprehensive 2017-01-12 10:15:18 -07:00
0b081b0086 whitespace cleanup 2017-01-11 21:05:32 -05:00
8e1cf6643c apply bugfix to fix wall/gran by eric_lyster@agilent.com on lammps-users 2017-01-11 20:59:40 -05:00
6950a99162 Revert "remove obsolete warning about fix rigid image flag restrictions"
This reverts commit 51e52b477a.
2017-01-11 19:49:58 -05:00
9f4e5e0661 fix a CUDA constructor warning
The class params_lj_coul was copy-pasted
into many different pair styles, and only
one of them had the proper KOKKOS_INLINE_FUNCTION
annotations for CUDA.
created a header file for this class that
most of the pair styles now include.
One pair style did add extra members,
so it keeps a local copy of the class.
2017-01-11 09:11:35 -07:00
34cb4027df make formatting comment consistent 2017-01-11 07:46:07 -05:00
1d0e600ab7 formatting improvements and small corrections for timer settings and output discussions 2017-01-10 23:47:14 -05:00
7162cafdf5 Squelching output from Makefile 2017-01-10 14:46:30 -07:00
ee9e7cfbd5 Fixing Kokkos CUDA Makefile issue 2017-01-10 13:22:36 -07:00
7839c335da Fixing compile error with Kokkos CUDA Makefiles 2017-01-10 13:05:00 -07:00
622d926849 adapt example inputs for TAD and PRD to the change in compute coord/atom 2017-01-10 13:41:35 -05:00
92d15d4a89 replace string compare with enums, fix memory leak, formatting cleanup 2017-01-10 12:52:37 -05:00
95706ac846 import contributed code for computes coord/atom and orientorder/atom 2017-01-10 12:29:22 -05:00
d06688bb91 USER-DPD: fix a typo in the DPD-H example input; update reference output. 2017-01-10 12:11:20 -05:00
d014e00e53 ignore some newly added styles from packages. 2017-01-09 17:51:38 -05:00
0db2a07993 another workaround for duplicate labels (which sphinx does not like) 2017-01-09 17:51:19 -05:00
33412c76ed correct some formatting issues with USER-NC-DUMP 2017-01-09 17:50:49 -05:00
e5ac49d1de Merge branch 'master' into collected-small-bugfixes 2017-01-09 17:13:46 -05:00
1a81da0f73 print the last input line, when error->all() is called
this should help tracking down input file errors for many
common cases without having to repeat the run with -echo screen
and avoid having to explain how to use that feature all the time
2017-01-09 17:03:06 -05:00
c31f1e9f22 add fix mscg command, example, lib 2017-01-09 13:36:40 -07:00
ebd25cc078 Updating docs for Kokkos package 2017-01-09 12:40:33 -07:00
9250a55923 Adding enable_lambda to KOKKOS_CUDA_OPTIONS 2017-01-09 12:24:30 -07:00
a9f0b7d523 Updating Kokkos lib 2017-01-09 10:39:46 -07:00
20f8a8c219 Merge branch 'master' into github-tutorial-update 2017-01-09 14:38:09 +01:00
09af780aa8 remove misleading comments 2017-01-06 21:31:39 -05:00
51e52b477a remove obsolete warning about fix rigid image flag restrictions 2017-01-06 21:30:33 -05:00
20a4e365b7 reduce warning when processing manual with sphinx 2017-01-06 21:30:13 -05:00
ccd09e3967 Updated images of succesful merge. 2017-01-06 19:04:26 +01:00
c7c6c44add update lookup table in pair style table as well 2017-01-03 16:42:30 -05:00
8e145e2b9f equivalent lookup table change for USER-INTEL 2017-01-03 16:40:06 -05:00
0f76bbc718 replace rsq_lookup.f with rsq when computing the interpolation fraction for lookup tables
this avoids truncation for rsq to single precision without need and thus should improve accuracy
2017-01-03 16:36:16 -05:00
1578 changed files with 388942 additions and 86763 deletions

View File

@ -14,7 +14,7 @@ lmp_linux_mixed
lmp_linux_double
The precision (single, mixed, double) refers to the GPU and USER-CUDA
pacakge precision. See the README files in the lib/gpu and lib/cuda
package precision. See the README files in the lib/gpu and lib/cuda
directories for instructions on how to build the packages with
different precisions. The GPU and USER-CUDA sub-sections of the
doc/Section_accelerate.html file also describes this process.

1
doc/.gitignore vendored
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@ -1,4 +1,5 @@
/html
/spelling
/LAMMPS.epub
/LAMMPS.mobi
/Manual.pdf

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@ -6,6 +6,7 @@ BUILDDIR = /tmp/lammps-docs-$(SHA1)
RSTDIR = $(BUILDDIR)/rst
VENV = $(BUILDDIR)/docenv
TXT2RST = $(VENV)/bin/txt2rst
ANCHORCHECK = $(VENV)/bin/doc_anchor_check
PYTHON = $(shell which python3)
HAS_PYTHON3 = NO
@ -22,7 +23,7 @@ endif
SOURCES=$(wildcard src/*.txt)
OBJECTS=$(SOURCES:src/%.txt=$(RSTDIR)/%.rst)
.PHONY: help clean-all clean epub html pdf old venv
.PHONY: help clean-all clean epub html pdf old venv spelling anchor_check
# ------------------------------------------
@ -36,6 +37,7 @@ help:
@echo " clean remove all intermediate RST files"
@echo " clean-all reset the entire build environment"
@echo " txt2html build txt2html tool"
@echo " anchor_check scan for duplicate anchor labels"
# ------------------------------------------
@ -44,12 +46,19 @@ clean-all:
clean:
rm -rf $(RSTDIR) html
rm -rf spelling
html: $(OBJECTS)
clean-spelling:
rm -rf spelling
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 ;\
echo "############################################" ;\
doc_anchor_check src/*.txt ;\
echo "############################################" ;\
deactivate ;\
)
-rm html/searchindex.js
@ -64,6 +73,17 @@ html: $(OBJECTS)
@rm -rf html/USER/*/*.[sg]*
@echo "Build finished. The HTML pages are in doc/html."
spelling: $(OBJECTS) utils/sphinx-config/false_positives.txt
@(\
. $(VENV)/bin/activate ;\
pip install sphinxcontrib-spelling ;\
cp -r src/* $(RSTDIR)/ ;\
cp utils/sphinx-config/false_positives.txt $(RSTDIR)/ ;\
sphinx-build -b spelling -c utils/sphinx-config -d $(BUILDDIR)/doctrees $(RSTDIR) spelling ;\
deactivate ;\
)
@echo "Spell check finished."
epub: $(OBJECTS)
@mkdir -p epub
@rm -f LAMMPS.epub
@ -112,6 +132,13 @@ fetch:
txt2html: utils/txt2html/txt2html.exe
anchor_check : $(ANCHORCHECK)
@(\
. $(VENV)/bin/activate ;\
doc_anchor_check src/*.txt ;\
deactivate ;\
)
# ------------------------------------------
utils/txt2html/txt2html.exe: utils/txt2html/txt2html.cpp
@ -136,7 +163,7 @@ $(VENV):
deactivate;\
)
$(TXT2RST): $(VENV)
$(TXT2RST) $(ANCHORCHECK): $(VENV)
@( \
. $(VENV)/bin/activate; \
(cd utils/converters;\

View File

@ -464,7 +464,7 @@ the angletype option can only be assigned to a "fix style" of "shake",
entirely rigid (e.g. water)
the angletype option enables an additional check when SHAKE constraints
are computed: if a cluster is of size 3 and both bonds in
the cluster are of a bondtype specified by the 2nd paramter of
the cluster are of a bondtype specified by the 2nd parameter of
angletype, then the cluster is SHAKEn with an additional angle
constraint that makes it rigid, using the equilibrium angle appropriate
to the specified angletype
@ -476,7 +476,7 @@ IMPORTANT NOTE: the angletype option has one additional affect, namely
since they will not be SHAKEn but neither will the angle force by computed
for style region, a coeff of INF means + or - infinity (all the way
to the boundary)
an atom can be assigned to multiple constraints, the contraints will be
an atom can be assigned to multiple constraints, the constraints will be
applied in the reverse order they are assigned to that atom
(e.g. each timestep, the last fix assigned to an atom will be applied
to it first, then the next-to-last applied second, etc)
@ -689,7 +689,7 @@ coeffs: types
remainder
no other parameters required
used with &quot;create temp&quot; commmand to initialize velocities of atoms
used with &quot;create temp&quot; command to initialize velocities of atoms
by default, the &quot;create temp&quot; command initializes the velocities of all atoms,
this command limits the initialization to a group of atoms
this command is only in force for the next &quot;create temp&quot; command, any
@ -1263,7 +1263,7 @@ when using constraints with the minimizer, fixes are
applied when atoms move except for the following
fixes associated with temperature control are not allowed
(rescale, hoover/drag, langevin)
the minimizer does not invoke the &quot;fix style shake&quot; contraints on
the minimizer does not invoke the &quot;fix style shake&quot; constraints on
bond lengths
the minimizer does not invoke pressure control or volume control settings
for good convergence, should specify use of smooth nonbond force fields
@ -1566,7 +1566,7 @@ mesh dimensions that are power-of-two are fastest for FFTs, but any sizes
can be used that are supported by native machine libraries
this command is optional - if not used, a default
mesh size will be chosen to satisfy accuracy criterion - if used, the
specifed mesh size will override the default
specified mesh size will override the default
</PRE>
<HR>
<H3>
@ -1788,7 +1788,7 @@ if the style is 2, restart information will be written alternately to files
when the minimizer is invoked this command means create a restart file
at the end of the minimization with the filename filename.timestep.min
a restart file stores atom and force-field information in binary form
allows program to restart from where it left off (see &quot;read restart&quot; commmand)
allows program to restart from where it left off (see &quot;read restart&quot; command)
Default = 0
</PRE>

View File

@ -167,7 +167,7 @@ tool on the small-system data file.</P>
<P>
(6) flow</P>
<P>
2-d flow of Lennard-Jones atoms in a channel using various contraint
2-d flow of Lennard-Jones atoms in a channel using various constraint
options.</P>
<P>
(7) polymer</P>
@ -201,7 +201,7 @@ The tools directory also has a F77 program called setup_chain.f
(compile and link with print.c) which can be used to generate random
initial polymer configurations for bead-spring models like those used
in examples/polymer. It uses an input polymer definition file (see
examples/polymer for two sample def files) that specfies how many
examples/polymer for two sample def files) that specifies how many
chains of what length, a random number seed, etc.</P>
</BODY>
</HTML>

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@ -40,7 +40,7 @@ Note: this file is somewhat out-of-date for LAMMPS 99.</P>
<LI>
maxtype = max # of atom types
<LI>
maxbond = max # of bonds to compute on one procesor
maxbond = max # of bonds to compute on one processor
<LI>
maxangle = max # of angles to compute on one processor
<LI>

View File

@ -294,7 +294,7 @@ assign a group of atoms to a particular constraint
use appropriate number of coeffs for a particular style
the constraint itself is defined by the &quot;fix style&quot; command
multiple groups of atoms can be assigned to the same constraint
an atom can be assigned to multiple constraints, the contraints will be
an atom can be assigned to multiple constraints, the constraints will be
applied in the reverse order they are assigned to that atom
(e.g. each timestep, the last fix assigned to an atom will be applied
to it first, then the next-to-last applied second, etc)
@ -477,7 +477,7 @@ coeffs: types
remainder
no other parameters required
used with &quot;create temp&quot; commmand to initialize velocities of atoms
used with &quot;create temp&quot; command to initialize velocities of atoms
by default, the &quot;create temp&quot; command initializes the velocities of all atoms,
this command limits the initialization to a group of atoms
this command is only in force for the next &quot;create temp&quot; command, any
@ -1124,7 +1124,7 @@ mesh dimensions that are power-of-two are fastest for FFTs, but any size
can be used that are supported by native machine libraries
this command is optional - if not used, a default
mesh size will be chosen to satisfy accuracy criterion - if used, the
specifed mesh size will override the default
specified mesh size will override the default
Default = none
</PRE>
@ -1343,7 +1343,7 @@ value of 0 means never create one
program will toggle between 2 filenames as the run progresses
so always have at least one good file even if the program dies in mid-write
restart file stores atom positions and velocities in binary form
allows program to restart from where it left off (see &quot;read restart&quot; commmand)
allows program to restart from where it left off (see &quot;read restart&quot; command)
Default = 0
</PRE>

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@ -0,0 +1,10 @@
\documentclass[12pt]{article}
\pagestyle{empty}
\begin{document}
$$
E = - \frac{\epsilon}{2} \ln \left[ 1 - \left(\frac{r-r0}{\Delta}\right)^2\right]
$$
\end{document}

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@ -0,0 +1,9 @@
\documentclass[12pt]{article}
\begin{document}
\begin{eqnarray*}
\mu &=&\mu^{id} + \mu^{ex}
\end{eqnarray*}
\end{document}

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10
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@ -0,0 +1,10 @@
\documentclass[12pt]{article}
\begin{document}
\begin{eqnarray*}
\mu^{id} &=& k T \ln{\rho \Lambda^3} \\
&=& k T \ln{\frac{\phi P \Lambda^3}{k T}}
\end{eqnarray*}
\end{document}

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@ -0,0 +1,9 @@
\documentclass[12pt]{article}
\begin{document}
\begin{eqnarray*}
\Lambda &=& \sqrt{ \frac{h^2}{2 \pi m k T}}
\end{eqnarray*}
\end{document}

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@ -0,0 +1,13 @@
\documentclass[12pt]{article}
\thispagestyle{empty}
\begin{document}
\begin{eqnarray*}
E & = & \frac{1}{2} \sum_i \sum_{j \neq i} V_{ij} \\
V_{ij} & = & e^{-\lambda(r_{ij} -z_0}) \left[ C + f(\rho_{ij}) + f(\rho_{ji}) \right] - A \left( \frac{r_{ij}}{z_0}\right)^{-6} + A \left( \frac{\textrm{cutoff}}{z_0}\right)^{-6} \\
\rho_{ij}^2 = \rho_{ji}^2 & = & x_{ij}^2 + y_{ij}^2 ~\hspace{2cm} (\mathbf{n_i}\equiv\hat \mathbf{z})\\
f(\rho) & = & e^{-(\rho/\delta)^2} \sum_{n=0}^2 C_{2n} \left( \rho/\delta \right) ^{2n}
\end{eqnarray*}
\end{document}

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13
doc/src/Eqs/pair_momb.tex Normal file
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@ -0,0 +1,13 @@
\documentclass[12pt,fleqn]{article}
\usepackage{amsmath}
\thispagestyle{empty}
\begin{document}
\setlength{\jot}{2ex}
\begin{gather*}
E = D_0 [\exp^{-2 \alpha (r-r_0)} - 2\exp^{-\alpha (r-r_0)}] - s_6 \frac{C_6}{r^6} f_{damp}(r,R_r) \\
f_{damp}(r,R_r) = \frac{1}{1 + \exp^{-d(r/R_r - 1)}}
\end{gather*}
\end{document}

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@ -1,7 +1,7 @@
<!-- HTML_ONLY -->
<HEAD>
<TITLE>LAMMPS Users Manual</TITLE>
<META NAME="docnumber" CONTENT="6 Jan 2017 version">
<META NAME="docnumber" CONTENT="31 Mar 2017 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
6 Jan 2017 version :c,h4
31 Mar 2017 version :c,h4
Version info: :h4
@ -39,7 +39,7 @@ directory name created when you unpack a tarball, and at the top of
the first page of the manual (this page).
If you browse the HTML doc pages on the LAMMPS WWW site, they always
describe the most current version of LAMMPS. :ulb,l
describe the most current [development] version of LAMMPS. :ulb,l
If you browse the HTML doc pages included in your tarball, they
describe the version you have. :l
@ -67,7 +67,7 @@ Labs and Temple University:
"Steve Plimpton"_sjp, sjplimp at sandia.gov :ulb,l
Aidan Thompson, athomps at sandia.gov :l
Stan Moore, stamoore at sandia.gov :l
Stan Moore, stamoor at sandia.gov :l
"Axel Kohlmeyer"_ako, akohlmey at gmail.com :l
:ule

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@ -281,12 +281,12 @@ the "minimize"_minimize.html command. A parallel tempering
3.4 Commands listed by category :link(cmd_4),h4
This section lists all LAMMPS commands, grouped by category. The
"next section"_#cmd_5 lists the same commands alphabetically. The
This section lists core LAMMPS commands, grouped by category.
The "next section"_#cmd_5 lists all commands alphabetically. The
next section also includes (long) lists of style options for entries
that appear in the following categories as a single command (fix,
compute, pair, etc). Commands that are added by user packages are not
included in these categories, but they are in the next section.
included in the categories here, but they are in the next section.
Initialization:
@ -361,7 +361,7 @@ Settings:
"timer"_timer.html,
"timestep"_timestep.html
Operations within timestepping (fixes) and diagnositics (computes):
Operations within timestepping (fixes) and diagnostics (computes):
"compute"_compute.html,
"compute_modify"_compute_modify.html,
@ -583,6 +583,7 @@ USER-INTEL, k = KOKKOS, o = USER-OMP, t = OPT.
"lineforce"_fix_lineforce.html,
"momentum (k)"_fix_momentum.html,
"move"_fix_move.html,
"mscg"_fix_mscg.html,
"msst"_fix_msst.html,
"neb"_fix_neb.html,
"nph (ko)"_fix_nh.html,
@ -686,6 +687,7 @@ package"_Section_start.html#start_3.
"eos/cv"_fix_eos_cv.html,
"eos/table"_fix_eos_table.html,
"eos/table/rx"_fix_eos_table_rx.html,
"filter/corotate"_fix_filter_corotate.html,
"flow/gauss"_fix_flow_gauss.html,
"gle"_fix_gle.html,
"grem"_fix_grem.html,
@ -701,6 +703,8 @@ package"_Section_start.html#start_3.
"meso"_fix_meso.html,
"manifoldforce"_fix_manifoldforce.html,
"meso/stationary"_fix_meso_stationary.html,
"nve/dot"_fix_nve_dot.html,
"nve/dotc/langevin"_fix_nve_dotc_langevin.html,
"nve/manifold/rattle"_fix_nve_manifold_rattle.html,
"nvk"_fix_nvk.html,
"nvt/manifold/rattle"_fix_nvt_manifold_rattle.html,
@ -918,7 +922,7 @@ KOKKOS, o = USER-OMP, t = OPT.
"dpd (go)"_pair_dpd.html,
"dpd/tstat (go)"_pair_dpd.html,
"dsmc"_pair_dsmc.html,
"eam (gkot)"_pair_eam.html,
"eam (gkiot)"_pair_eam.html,
"eam/alloy (gkot)"_pair_eam.html,
"eam/fs (gkot)"_pair_eam.html,
"eim (o)"_pair_eim.html,
@ -936,6 +940,8 @@ KOKKOS, o = USER-OMP, t = OPT.
"lj/charmm/coul/charmm/implicit (ko)"_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,
"lj/class2 (gko)"_pair_class2.html,
"lj/class2/coul/cut (ko)"_pair_class2.html,
"lj/class2/coul/long (gko)"_pair_class2.html,
@ -966,7 +972,7 @@ KOKKOS, o = USER-OMP, t = OPT.
"lubricateU/poly"_pair_lubricateU.html,
"meam"_pair_meam.html,
"mie/cut (o)"_pair_mie.html,
"morse (got)"_pair_morse.html,
"morse (gkot)"_pair_morse.html,
"nb3b/harmonic (o)"_pair_nb3b_harmonic.html,
"nm/cut (o)"_pair_nm.html,
"nm/cut/coul/cut (o)"_pair_nm.html,
@ -1013,6 +1019,7 @@ package"_Section_start.html#start_3.
"eff/cut"_pair_eff.html,
"exp6/rx"_pair_exp6_rx.html,
"gauss/cut"_pair_gauss.html,
"kolmogorov/crespi/z"_pair_kolmogorov_crespi_z.html,
"lennard/mdf"_pair_mdf.html,
"list"_pair_list.html,
"lj/charmm/coul/long/soft (o)"_pair_charmm.html,
@ -1030,10 +1037,20 @@ package"_Section_start.html#start_3.
"meam/spline (o)"_pair_meam_spline.html,
"meam/sw/spline"_pair_meam_sw_spline.html,
"mgpt"_pair_mgpt.html,
"momb"_pair_momb.html,
"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,
"oxdna/coaxstk"_pair_oxdna.html,
"oxdna/excv"_pair_oxdna.html,
"oxdna/hbond"_pair_oxdna.html,
"oxdna/stk"_pair_oxdna.html,
"oxdna/xstk"_pair_oxdna.html,
"oxdna2/coaxstk"_pair_oxdna2.html,
"oxdna2/dh"_pair_oxdna2.html,
"oxdna2/excv"_pair_oxdna2.html,
"oxdna2/stk"_pair_oxdna2.html,
"quip"_pair_quip.html,
"reax/c (k)"_pair_reax_c.html,
"smd/hertz"_pair_smd_hertz.html,
@ -1051,7 +1068,7 @@ package"_Section_start.html#start_3.
"table/rx"_pair_table_rx.html,
"tersoff/table (o)"_pair_tersoff.html,
"thole"_pair_thole.html,
"tip4p/long/soft (o)"_pair_lj_soft.html :tb(c=4,ea=c)
"tip4p/long/soft (o)"_pair_lj_soft.html :tb(c=4,ea=c)
:line
@ -1068,7 +1085,7 @@ KOKKOS, o = USER-OMP, t = OPT.
"none"_bond_none.html,
"zero"_bond_zero.html,
"hybrid"_bond_hybrid.html,
"class2 (o)"_bond_class2.html,
"class2 (ko)"_bond_class2.html,
"fene (iko)"_bond_fene.html,
"fene/expand (o)"_bond_fene_expand.html,
"harmonic (ko)"_bond_harmonic.html,
@ -1082,7 +1099,9 @@ if "LAMMPS is built with the appropriate
package"_Section_start.html#start_3.
"harmonic/shift (o)"_bond_harmonic_shift.html,
"harmonic/shift/cut (o)"_bond_harmonic_shift_cut.html :tb(c=4,ea=c)
"harmonic/shift/cut (o)"_bond_harmonic_shift_cut.html,
"oxdna/fene"_bond_oxdna.html,
"oxdna2/fene"_bond_oxdna.html :tb(c=4,ea=c)
:line
@ -1100,7 +1119,7 @@ USER-OMP, t = OPT.
"zero"_angle_zero.html,
"hybrid"_angle_hybrid.html,
"charmm (ko)"_angle_charmm.html,
"class2 (o)"_angle_class2.html,
"class2 (ko)"_angle_class2.html,
"cosine (o)"_angle_cosine.html,
"cosine/delta (o)"_angle_cosine_delta.html,
"cosine/periodic (o)"_angle_cosine_periodic.html,
@ -1136,7 +1155,8 @@ USER-OMP, t = OPT.
"zero"_dihedral_zero.html,
"hybrid"_dihedral_hybrid.html,
"charmm (ko)"_dihedral_charmm.html,
"class2 (o)"_dihedral_class2.html,
"charmmfsh"_dihedral_charmm.html,
"class2 (ko)"_dihedral_class2.html,
"harmonic (io)"_dihedral_harmonic.html,
"helix (o)"_dihedral_helix.html,
"multi/harmonic (o)"_dihedral_multi_harmonic.html,
@ -1168,7 +1188,7 @@ USER-OMP, t = OPT.
"none"_improper_none.html,
"zero"_improper_zero.html,
"hybrid"_improper_hybrid.html,
"class2 (o)"_improper_class2.html,
"class2 (ko)"_improper_class2.html,
"cvff (io)"_improper_cvff.html,
"harmonic (ko)"_improper_harmonic.html,
"umbrella (o)"_improper_umbrella.html :tb(c=4,ea=c)

View File

@ -22,7 +22,7 @@ either conceptually, or as printed out by the program.
12.1 Common problems :link(err_1),h4
If two LAMMPS runs do not produce the same answer on different
If two LAMMPS runs do not produce the exact same answer on different
machines or different numbers of processors, this is typically not a
bug. In theory you should get identical answers on any number of
processors and on any machine. In practice, numerical round-off can
@ -55,12 +55,13 @@ LAMMPS errors are detected at setup time; others like a bond
stretching too far may not occur until the middle of a run.
LAMMPS tries to flag errors and print informative error messages so
you can fix the problem. Of course, LAMMPS cannot figure out your
physics or numerical mistakes, like choosing too big a timestep,
specifying erroneous force field coefficients, or putting 2 atoms on
top of each other! If you run into errors that LAMMPS doesn't catch
that you think it should flag, please send an email to the
"developers"_http://lammps.sandia.gov/authors.html.
you can fix the problem. For most errors it will also print the last
input script command that it was processing. Of course, LAMMPS cannot
figure out your physics or numerical mistakes, like choosing too big a
timestep, specifying erroneous force field coefficients, or putting 2
atoms on top of each other! If you run into errors that LAMMPS
doesn't catch that you think it should flag, please send an email to
the "developers"_http://lammps.sandia.gov/authors.html.
If you get an error message about an invalid command in your input
script, you can determine what command is causing the problem by
@ -79,12 +80,24 @@ order. If you mess this up, LAMMPS will often flag the error, but it
may also simply read a bogus argument and assign a value that is
valid, but not what you wanted. E.g. trying to read the string "abc"
as an integer value of 0. Careful reading of the associated doc page
for the command should allow you to fix these problems. Note that
some commands allow for variables to be specified in place of numeric
constants so that the value can be evaluated and change over the
course of a run. This is typically done with the syntax {v_name} for
a parameter, where name is the name of the variable. This is only
allowed if the command documentation says it is.
for the command should allow you to fix these problems. In most cases,
where LAMMPS expects to read a number, either integer or floating point,
it performs a stringent test on whether the provided input actually
is an integer or floating-point number, respectively, and reject the
input with an error message (for instance, when an integer is required,
but a floating-point number 1.0 is provided):
ERROR: Expected integer parameter in input script or data file :pre
Some commands allow for using variable references in place of numeric
constants so that the value can be evaluated and may change over the
course of a run. This is typically done with the syntax {v_name} for a
parameter, where name is the name of the variable. On the other hand,
immediate variable expansion with the syntax ${name} is performed while
reading the input and before parsing commands,
NOTE: Using a variable reference (i.e. {v_name}) is only allowed if
the documentation of the corresponding command explicitly says it is.
Generally, LAMMPS will print a message to the screen and logfile and
exit gracefully when it encounters a fatal error. Sometimes it will
@ -561,11 +574,11 @@ group of atoms correctly. :dd
{Bad quadratic solve for particle/line collision} :dt
This is an internal error. It should nornally not occur. :dd
This is an internal error. It should normally not occur. :dd
{Bad quadratic solve for particle/tri collision} :dt
This is an internal error. It should nornally not occur. :dd
This is an internal error. It should normally not occur. :dd
{Bad real space Coulomb cutoff in fix tune/kspace} :dt
@ -899,7 +912,7 @@ Atoms can not be added afterwards to this fix option. :dd
{Cannot append atoms to a triclinic box} :dt
The simulation box must be defined with edges alligned with the
The simulation box must be defined with edges aligned with the
Cartesian axes. :dd
{Cannot balance in z dimension for 2d simulation} :dt
@ -979,7 +992,7 @@ file. :dd
LAMMPS failed to compute an initial guess for the PPPM_disp g_ewald_6
factor that partitions the computation between real space and k-space
for Disptersion interactions. :dd
for Dispersion interactions. :dd
{Cannot create an atom map unless atoms have IDs} :dt
@ -1314,7 +1327,7 @@ Self-explanatory. :dd
This file is created when you use some LAMMPS features, to indicate
what paper you should cite on behalf of those who implemented
the feature. Check that you have write priveleges into the directory
the feature. Check that you have write privileges into the directory
you are running in. :dd
{Cannot open log.lammps for writing} :dt
@ -1992,7 +2005,7 @@ Self-explanatory. :dd
{Cannot use fix reax/bonds without pair_style reax} :dt
Self-explantory. :dd
Self-explanatory. :dd
{Cannot use fix rigid npt/nph and fix deform on same component of stress tensor} :dt
@ -2075,7 +2088,7 @@ Self-explanatory. :dd
{Cannot use lines with fix srd unless overlap is set} :dt
This is because line segements are connected to each other. :dd
This is because line segments are connected to each other. :dd
{Cannot use multiple fix wall commands with pair brownian} :dt
@ -2118,7 +2131,7 @@ Self-explanatory. :dd
{Cannot use newton pair with born/gpu pair style} :dt
Self-explantory. :dd
Self-explanatory. :dd
{Cannot use newton pair with buck/coul/cut/gpu pair style} :dt
@ -2278,7 +2291,7 @@ Self-explanatory. :dd
{Cannot use newton pair with zbl/gpu pair style} :dt
Self-explantory. :dd
Self-explanatory. :dd
{Cannot use non-zero forces in an energy minimization} :dt
@ -2628,11 +2641,11 @@ uses a pairwise neighbor list. :dd
{Compute chunk/atom bin/cylinder radius is too large for periodic box} :dt
Radius cannot be bigger than 1/2 of a non-axis periodic dimention. :dd
Radius cannot be bigger than 1/2 of a non-axis periodic dimension. :dd
{Compute chunk/atom bin/sphere radius is too large for periodic box} :dt
Radius cannot be bigger than 1/2 of any periodic dimention. :dd
Radius cannot be bigger than 1/2 of any periodic dimension. :dd
{Compute chunk/atom compute array is accessed out-of-range} :dt
@ -2693,15 +2706,15 @@ It will only store IDs if its compress option is enabled. :dd
{Compute chunk/atom stores no coord1 for compute property/chunk} :dt
Only certain binning options for comptue chunk/atom store coordinates. :dd
Only certain binning options for compute chunk/atom store coordinates. :dd
{Compute chunk/atom stores no coord2 for compute property/chunk} :dt
Only certain binning options for comptue chunk/atom store coordinates. :dd
Only certain binning options for compute chunk/atom store coordinates. :dd
{Compute chunk/atom stores no coord3 for compute property/chunk} :dt
Only certain binning options for comptue chunk/atom store coordinates. :dd
Only certain binning options for compute chunk/atom store coordinates. :dd
{Compute chunk/atom variable is not atom-style variable} :dt
@ -2722,11 +2735,11 @@ is used to find clusters. :dd
{Compute cna/atom cutoff is longer than pairwise cutoff} :dt
Self-explantory. :dd
Self-explanatory. :dd
{Compute cna/atom requires a pair style be defined} :dt
Self-explantory. :dd
Self-explanatory. :dd
{Compute com/chunk does not use chunk/atom compute} :dt
@ -2734,7 +2747,7 @@ The style of the specified compute is not chunk/atom. :dd
{Compute contact/atom requires a pair style be defined} :dt
Self-explantory. :dd
Self-explanatory. :dd
{Compute contact/atom requires atom style sphere} :dt
@ -2747,7 +2760,7 @@ since those atoms are not in the neighbor list. :dd
{Compute coord/atom requires a pair style be defined} :dt
Self-explantory. :dd
Self-explanatory. :dd
{Compute damage/atom requires peridynamic potential} :dt
@ -2777,7 +2790,7 @@ Self-explanatory. :dd
{Compute erotate/asphere requires extended particles} :dt
This compute cannot be used with point paritlces. :dd
This compute cannot be used with point particles. :dd
{Compute erotate/rigid with non-rigid fix-ID} :dt
@ -2822,7 +2835,7 @@ Cannot compute order parameter beyond cutoff. :dd
{Compute hexorder/atom requires a pair style be defined} :dt
Self-explantory. :dd
Self-explanatory. :dd
{Compute improper/local used when impropers are not allowed} :dt
@ -2868,11 +2881,11 @@ Cannot compute order parameter beyond cutoff. :dd
{Compute orientorder/atom requires a pair style be defined} :dt
Self-explantory. :dd
Self-explanatory. :dd
{Compute pair must use group all} :dt
Pair styles accumlate energy on all atoms. :dd
Pair styles accumulate energy on all atoms. :dd
{Compute pe must use group all} :dt
@ -2922,7 +2935,7 @@ The style of the specified compute is not chunk/atom. :dd
{Compute property/local cannot use these inputs together} :dt
Only inputs that generate the same number of datums can be used
togther. E.g. bond and angle quantities cannot be mixed. :dd
together. E.g. bond and angle quantities cannot be mixed. :dd
{Compute property/local does not (yet) work with atom_style template} :dt
@ -3066,7 +3079,7 @@ Self-explanatory. :dd
{Compute temp/asphere requires extended particles} :dt
This compute cannot be used with point paritlces. :dd
This compute cannot be used with point particles. :dd
{Compute temp/body requires atom style body} :dt
@ -3511,12 +3524,12 @@ path and name are correct. :dd
{Could not process Python file} :dt
The Python code in the specified file was not run sucessfully by
The Python code in the specified file was not run successfully by
Python, probably due to errors in the Python code. :dd
{Could not process Python string} :dt
The Python code in the here string was not run sucessfully by Python,
The Python code in the here string was not run successfully by Python,
probably due to errors in the Python code. :dd
{Coulomb PPPMDisp order has been reduced below minorder} :dt
@ -3625,7 +3638,7 @@ Self-explanatory. :dd
{Cutoffs missing in pair_style buck/long/coul/long} :dt
Self-exlanatory. :dd
Self-explanatory. :dd
{Cutoffs missing in pair_style lj/long/coul/long} :dt
@ -4372,7 +4385,7 @@ Self-explanatory. :dd
{Fix ave/chunk does not use chunk/atom compute} :dt
The specified conpute is not for a compute chunk/atom command. :dd
The specified compute is not for a compute chunk/atom command. :dd
{Fix ave/chunk fix does not calculate a per-atom array} :dt
@ -4604,11 +4617,11 @@ An index for the array is out of bounds. :dd
{Fix ave/time compute does not calculate a scalar} :dt
Self-explantory. :dd
Self-explanatory. :dd
{Fix ave/time compute does not calculate a vector} :dt
Self-explantory. :dd
Self-explanatory. :dd
{Fix ave/time compute does not calculate an array} :dt
@ -4957,7 +4970,7 @@ Self-explanatory. :dd
{Fix langevin angmom requires extended particles} :dt
This fix option cannot be used with point paritlces. :dd
This fix option cannot be used with point particles. :dd
{Fix langevin omega is not yet implemented with kokkos} :dt
@ -6158,7 +6171,7 @@ map command will force an atom map to be created. :dd
{Initial temperatures not all set in fix ttm} :dt
Self-explantory. :dd
Self-explanatory. :dd
{Input line quote not followed by whitespace} :dt
@ -6186,7 +6199,7 @@ Eigensolve for rigid body was not sufficiently accurate. :dd
{Insufficient Jacobi rotations for triangle} :dt
The calculation of the intertia tensor of the triangle failed. This
The calculation of the inertia tensor of the triangle failed. This
should not happen if it is a reasonably shaped triangle. :dd
{Insufficient memory on accelerator} :dt
@ -6450,15 +6463,15 @@ Self-explanatory. :dd
{Invalid attribute in dump custom command} :dt
Self-explantory. :dd
Self-explanatory. :dd
{Invalid attribute in dump local command} :dt
Self-explantory. :dd
Self-explanatory. :dd
{Invalid attribute in dump modify command} :dt
Self-explantory. :dd
Self-explanatory. :dd
{Invalid basis setting in create_atoms command} :dt
@ -6724,7 +6737,7 @@ or cause multiple files to be written. :dd
Filenames used with the dump xyz style cannot be binary or cause files
to be written by each processor. :dd
{Invalid dump_modify threshhold operator} :dt
{Invalid dump_modify threshold operator} :dt
Operator keyword used for threshold specification in not recognized. :dd
@ -6738,7 +6751,7 @@ The fix is not recognized. :dd
{Invalid fix ave/time off column} :dt
Self-explantory. :dd
Self-explanatory. :dd
{Invalid fix box/relax command for a 2d simulation} :dt
@ -7300,7 +7313,7 @@ Self-explanatory. Check the input script or data file. :dd
{LJ6 off not supported in pair_style buck/long/coul/long} :dt
Self-exlanatory. :dd
Self-explanatory. :dd
{Label wasn't found in input script} :dt
@ -7348,7 +7361,7 @@ This should not occur. Report the problem to the developers. :dd
Lost atoms are checked for each time thermo output is done. See the
thermo_modify lost command for options. Lost atoms usually indicate
bad dynamics, e.g. atoms have been blown far out of the simulation
box, or moved futher than one processor's sub-domain away before
box, or moved further than one processor's sub-domain away before
reneighboring. :dd
{MEAM library error %d} :dt
@ -7513,7 +7526,7 @@ Self-explanatory. :dd
{Molecule template ID for create_atoms does not exist} :dt
Self-explantory. :dd
Self-explanatory. :dd
{Molecule template ID for fix deposit does not exist} :dt
@ -7539,7 +7552,7 @@ Self-explanatory. :dd
Self-explanatory. :dd
{Molecule toplogy/atom exceeds system topology/atom} :dt
{Molecule topology/atom exceeds system topology/atom} :dt
The number of bonds, angles, etc per-atom in the molecule exceeds the
system setting. See the create_box command for how to specify these
@ -7779,7 +7792,7 @@ Self-explanatory. :dd
{Must use variable energy with fix addforce} :dt
Must define an energy vartiable when applyting a dynamic
Must define an energy variable when applying a dynamic
force during minimization. :dd
{Must use variable energy with fix efield} :dt
@ -8029,7 +8042,7 @@ Self-explanatory. :dd
{Non digit character between brackets in variable} :dt
Self-explantory. :dd
Self-explanatory. :dd
{Non integer # of swaps in temper command} :dt
@ -8650,7 +8663,7 @@ not be invoked by bond_style quartic. :dd
{Pair style does not support compute group/group} :dt
The pair_style does not have a single() function, so it cannot be
invokded by the compute group/group command. :dd
invoked by the compute group/group command. :dd
{Pair style does not support compute pair/local} :dt
@ -8935,11 +8948,11 @@ Self-explanatory. :dd
{Pair yukawa/colloid requires atom style sphere} :dt
Self-explantory. :dd
Self-explanatory. :dd
{Pair yukawa/colloid requires atoms with same type have same radius} :dt
Self-explantory. :dd
Self-explanatory. :dd
{Pair yukawa/colloid/gpu requires atom style sphere} :dt
@ -9153,7 +9166,7 @@ Self-explanatory. :dd
{Python function evaluation failed} :dt
The Python function did not run succesfully and/or did not return a
The Python function did not run successfully and/or did not return a
value (if it is supposed to return a value). This is probably due to
some error condition in the function. :dd
@ -10012,7 +10025,7 @@ make sense in between runs. :dd
{Threshhold for an atom property that isn't allocated} :dt
A dump threshhold has been requested on a quantity that is
A dump threshold has been requested on a quantity that is
not defined by the atom style used in this simulation. :dd
{Timestep must be >= 0} :dt
@ -10074,7 +10087,7 @@ to a large size. :dd
{Too many atom triplets for pair bop} :dt
The number of three atom groups for angle determinations exceeds the
expected number. Check your atomic structrure to ensure that it is
expected number. Check your atomic structure to ensure that it is
realistic. :dd
{Too many atoms for dump dcd} :dt
@ -10142,7 +10155,7 @@ to a large size. :dd
{Too many timesteps} :dt
The cummulative timesteps must fit in a 64-bit integer. :dd
The cumulative timesteps must fit in a 64-bit integer. :dd
{Too many timesteps for NEB} :dt
@ -10641,7 +10654,7 @@ Only atom-style variables can be used. :dd
{Variable for region cylinder is invalid style} :dt
Only equal-style varaibles are allowed. :dd
Only equal-style variables are allowed. :dd
{Variable for region is invalid style} :dt
@ -10653,7 +10666,7 @@ Self-explanatory. :dd
{Variable for region sphere is invalid style} :dt
Only equal-style varaibles are allowed. :dd
Only equal-style variables are allowed. :dd
{Variable for restart is invalid style} :dt
@ -10694,7 +10707,7 @@ Self-explanatory. :dd
{Variable has circular dependency} :dt
A circular dependency is when variable "a" in used by variable "b" and
variable "b" is also used by varaible "a". Circular dependencies with
variable "b" is also used by variable "a". Circular dependencies with
longer chains of dependence are also not allowed. :dd
{Variable name between brackets must be alphanumeric or underscore characters} :dt
@ -10783,7 +10796,7 @@ Self-explanatory. :dd
{Variable name for fix deform does not exist} :dt
Self-explantory. :dd
Self-explanatory. :dd
{Variable name for fix efield does not exist} :dt
@ -11070,7 +11083,7 @@ for a dihedral) and adding a small amount of stretch. :dd
{Both groups in compute group/group have a net charge; the Kspace boundary correction to energy will be non-zero} :dt
Self-explantory. :dd
Self-explanatory. :dd
{Calling write_dump before a full system init.} :dt
@ -11401,7 +11414,7 @@ The command options you have used caused atoms to be lost. :dd
Lost atoms are checked for each time thermo output is done. See the
thermo_modify lost command for options. Lost atoms usually indicate
bad dynamics, e.g. atoms have been blown far out of the simulation
box, or moved futher than one processor's sub-domain away before
box, or moved further than one processor's sub-domain away before
reneighboring. :dd
{MSM mesh too small, increasing to 2 points in each direction} :dt
@ -11439,7 +11452,7 @@ i.e. the first molecule in the template. :dd
{Molecule template for fix shake has multiple molecules} :dt
The fix shake command will only recoginze molecules of a single
The fix shake command will only recognize molecules of a single
type, i.e. the first molecule in the template. :dd
{More than one compute centro/atom} :dt
@ -11524,7 +11537,7 @@ neigh_modify exclude command. :dd
If a thermo_style command is used after a thermo_modify command, the
settings changed by the thermo_modify command will be reset to their
default values. This is because the thermo_modify commmand acts on
default values. This is because the thermo_modify command acts on
the currently defined thermo style, and a thermo_style command creates
a new style. :dd
@ -11576,7 +11589,7 @@ This may not be what you intended. :dd
{One or more dynamic groups may not be updated at correct point in timestep} :dt
If there are other fixes that act immediately after the intitial stage
If there are other fixes that act immediately after the initial stage
of time integration within a timestep (i.e. after atoms move), then
the command that sets up the dynamic group should appear after those
fixes. This will insure that dynamic group assignments are made
@ -11873,7 +11886,7 @@ Self-explanatory. :dd
{Using largest cutoff for buck/long/coul/long} :dt
Self-exlanatory. :dd
Self-explanatory. :dd
{Using largest cutoff for lj/long/coul/long} :dt

View File

@ -25,9 +25,7 @@ files and image files.
If you uncomment the "dump"_dump.html command in the input script, a
text dump file will be produced, which can be animated by various
"visualization programs"_http://lammps.sandia.gov/viz.html. It can
also be animated using the xmovie tool described in the "Additional
Tools"_Section_tools.html section of the LAMMPS documentation.
"visualization programs"_http://lammps.sandia.gov/viz.html.
If you uncomment the "dump image"_dump.html command in the input
script, and assuming you have built LAMMPS with a JPG library, JPG
@ -53,9 +51,11 @@ Lowercase directories :h4
accelerate: run with various acceleration options (OpenMP, GPU, Phi)
balance: dynamic load balancing, 2d system
body: body particles, 2d system
cmap: CMAP 5-body contributions to CHARMM force field
colloid: big colloid particles in a small particle solvent, 2d system
comb: models using the COMB potential
coreshell: core/shell model using CORESHELL package
controller: use of fix controller as a thermostat
crack: crack propagation in a 2d solid
deposit: deposit atoms and molecules on a surface
dipole: point dipolar particles, 2d system
@ -64,6 +64,8 @@ eim: NaCl using the EIM potential
ellipse: ellipsoidal particles in spherical solvent, 2d system
flow: Couette and Poiseuille flow in a 2d channel
friction: frictional contact of spherical asperities between 2d surfaces
gcmc: Grand Canonical Monte Carlo (GCMC) via the fix gcmc command
granregion: use of fix wall/region/gran as boundary on granular particles
hugoniostat: Hugoniostat shock dynamics
indent: spherical indenter into a 2d solid
kim: use of potentials in Knowledge Base for Interatomic Models (KIM)
@ -71,6 +73,7 @@ meam: MEAM test for SiC and shear (same as shear examples)
melt: rapid melt of 3d LJ system
micelle: self-assembly of small lipid-like molecules into 2d bilayers
min: energy minimization of 2d LJ melt
mscg: parameterize a multi-scale coarse-graining (MSCG) model
msst: MSST shock dynamics
nb3b: use of nonbonded 3-body harmonic pair style
neb: nudged elastic band (NEB) calculation for barrier finding
@ -89,7 +92,8 @@ snap: NVE dynamics for BCC tantalum crystal using SNAP potential
srd: stochastic rotation dynamics (SRD) particles as solvent
streitz: use of Streitz/Mintmire potential with charge equilibration
tad: temperature-accelerated dynamics of vacancy diffusion in bulk Si
vashishta: use of the Vashishta potential :tb(s=:)
vashishta: use of the Vashishta potential
voronoi: Voronoi tesselation via compute voronoi/atom command :tb(s=:)
Here is how you can run and visualize one of the sample problems:

View File

@ -37,7 +37,7 @@ pitfalls or alternatives.
Please see some of the closed issues for examples of how to
suggest code enhancements, submit proposed changes, or report
possible bugs and how they are resoved.
possible bugs and how they are resolved.
As an alternative to using GitHub, you may e-mail the
"core developers"_http://lammps.sandia.gov/authors.html or send

View File

@ -165,9 +165,16 @@ Many of the example input scripts included in the LAMMPS distribution
are for 2d models.
NOTE: Some models in LAMMPS treat particles as finite-size spheres, as
opposed to point particles. In 2d, the particles will still be
spheres, not disks, meaning their moment of inertia will be the same
as in 3d.
opposed to point particles. See the "atom_style
sphere"_atom_style.html and "fix nve/sphere"_fix_nve_sphere.html
commands for details. By default, for 2d simulations, such particles
will still be modeled as 3d spheres, not 2d discs (circles), meaning
their moment of inertia will be that of a sphere. If you wish to
model them as 2d discs, see the "set density/disc"_set.html command
and the {disc} option for the "fix nve/sphere"_fix_nve_sphere.html,
"fix nvt/sphere"_fix_nvt_sphere.html, "fix
nph/sphere"_fix_nph_sphere.html, "fix npt/sphere"_fix_npt_sphere.html
commands.
:line
@ -197,7 +204,10 @@ documentation for the formula it computes.
"bond_style"_bond_harmonic.html harmonic
"angle_style"_angle_charmm.html charmm
"dihedral_style"_dihedral_charmm.html charmmfsh
"dihedral_style"_dihedral_charmm.html charmm
"pair_style"_pair_charmm.html lj/charmmfsw/coul/charmmfsh
"pair_style"_pair_charmm.html lj/charmmfsw/coul/long
"pair_style"_pair_charmm.html lj/charmm/coul/charmm
"pair_style"_pair_charmm.html lj/charmm/coul/charmm/implicit
"pair_style"_pair_charmm.html lj/charmm/coul/long :ul
@ -205,6 +215,12 @@ documentation for the formula it computes.
"special_bonds"_special_bonds.html charmm
"special_bonds"_special_bonds.html amber :ul
NOTE: For CHARMM, the newer {charmmfsw} or {charmmfsh} styles were
released in March 2017. We recommend they be used instead of the
older {charmm} styles. See discussion of the differences on the "pair
charmm"_pair_charmm.html and "dihedral charmm"_dihedral_charmm.html
doc pages.
DREIDING is a generic force field developed by the "Goddard
group"_http://www.wag.caltech.edu at Caltech and is useful for
predicting structures and dynamics of organic, biological and
@ -434,6 +450,12 @@ computations between frozen atoms by using this command:
"neigh_modify"_neigh_modify.html exclude :ul
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.
:line
6.7 TIP3P water model :link(howto_7),h4
@ -451,7 +473,7 @@ atoms and the water molecule to run a rigid TIP3P-CHARMM model with a
cutoff. The K values can be used if a flexible TIP3P model (without
fix shake) is desired. If the LJ epsilon and sigma for HH and OH are
set to 0.0, it corresponds to the original 1983 TIP3P model
"(Jorgensen)"_#Jorgensen.
"(Jorgensen)"_#Jorgensen1.
O mass = 15.9994
H mass = 1.008
@ -469,7 +491,7 @@ K of HOH angle = 55
theta of HOH angle = 104.52 :all(b),p
These are the parameters to use for TIP3P with a long-range Coulombic
solver (e.g. Ewald or PPPM in LAMMPS), see "(Price)"_#Price for
solver (e.g. Ewald or PPPM in LAMMPS), see "(Price)"_#Price1 for
details:
O mass = 15.9994
@ -513,7 +535,7 @@ using the "fix shake"_fix_shake.html command.
These are the additional parameters (in real units) to set for O and H
atoms and the water molecule to run a rigid TIP4P model with a cutoff
"(Jorgensen)"_#Jorgensen. Note that the OM distance is specified in
"(Jorgensen)"_#Jorgensen1. Note that the OM distance is specified in
the "pair_style"_pair_style.html command, not as part of the pair
coefficients.
@ -573,7 +595,7 @@ LJ epsilon of O-O = 0.16275
LJ sigma of O-O = 3.16435
LJ epsilon, sigma of OH, HH = 0.0 :all(b),p
Note that the when using the TIP4P pair style, the neighobr list
Note that the when using the TIP4P pair style, the neighbor list
cutoff for Coulomb interactions is effectively extended by a distance
2 * (OM distance), to account for the offset distance of the
fictitious charges on O atoms in water molecules. Thus it is
@ -618,7 +640,7 @@ any of the parameters above, though it becomes a different model in
that mode of usage.
The SPC/E (extended) water model is the same, except
the partial charge assignemnts change:
the partial charge assignments change:
O charge = -0.8476
H charge = 0.4238 :all(b),p
@ -737,23 +759,14 @@ LAMMPS itself does not do visualization, but snapshots from LAMMPS
simulations can be visualized (and analyzed) in a variety of ways.
LAMMPS snapshots are created by the "dump"_dump.html command which can
create files in several formats. The native LAMMPS dump format is a
create files in several formats. The native LAMMPS dump format is a
text file (see "dump atom" or "dump custom") which can be visualized
by the "xmovie"_Section_tools.html#xmovie program, included with the
LAMMPS package. This produces simple, fast 2d projections of 3d
systems, and can be useful for rapid debugging of simulation geometry
and atom trajectories.
by several popular visualization tools. The "dump image"_dump_image.html
and "dump movie"_dump_image.html styles can output internally rendered
images and convert a sequence of them to a movie during the MD run.
Several programs included with LAMMPS as auxiliary tools can convert
native LAMMPS dump files to other formats. See the
"Section 9"_Section_tools.html doc page for details. The first is
the "ch2lmp tool"_Section_tools.html#charmm, which contains a
lammps2pdb Perl script which converts LAMMPS dump files into PDB
files. The second is the "lmp2arc tool"_Section_tools.html#arc which
converts LAMMPS dump files into Accelrys' Insight MD program files.
The third is the "lmp2cfg tool"_Section_tools.html#cfg which converts
LAMMPS dump files into CFG files which can be read into the
"AtomEye"_atomeye visualizer.
between LAMMPS format files and other formats.
See the "Section 9"_Section_tools.html doc page for details.
A Python-based toolkit distributed by our group can read native LAMMPS
dump files, including custom dump files with additional columns of
@ -766,22 +779,7 @@ RasMol visualization programs. Pizza.py has tools that do interactive
3d OpenGL visualization and one that creates SVG images of dump file
snapshots.
LAMMPS can create XYZ files directly (via "dump xyz") which is a
simple text-based file format used by many visualization programs
including "VMD"_vmd.
LAMMPS can create DCD files directly (via "dump dcd") which can be
read by "VMD"_vmd in conjunction with a CHARMM PSF file. Using this
form of output avoids the need to convert LAMMPS snapshots to PDB
files. See the "dump"_dump.html command for more information on DCD
files.
LAMMPS can create XTC files directly (via "dump xtc") which is GROMACS
file format which can also be read by "VMD"_vmd for visualization.
See the "dump"_dump.html command for more information on XTC files.
:link(pizza,http://www.sandia.gov/~sjplimp/pizza.html)
:link(vmd,http://www.ks.uiuc.edu/Research/vmd)
:link(ensight,http://www.ensight.com)
:link(atomeye,http://mt.seas.upenn.edu/Archive/Graphics/A)
@ -863,7 +861,7 @@ boundary conditions in specific dimensions. See the command doc pages
for details.
The 9 parameters (xlo,xhi,ylo,yhi,zlo,zhi,xy,xz,yz) are defined at the
time the simluation box is created. This happens in one of 3 ways.
time the simulation box is created. This happens in one of 3 ways.
If the "create_box"_create_box.html command is used with a region of
style {prism}, then a triclinic box is setup. See the
"region"_region.html command for details. If the
@ -982,10 +980,10 @@ used with non-orthogonal basis vectors to define a lattice that will
tile a triclinic simulation box via the
"create_atoms"_create_atoms.html command.
A second use is to run Parinello-Rahman dyanamics via the "fix
A second use is to run Parinello-Rahman dynamics via the "fix
npt"_fix_nh.html command, which will adjust the xy, xz, yz tilt
factors to compensate for off-diagonal components of the pressure
tensor. The analalog for an "energy minimization"_minimize.html is
tensor. The analog for an "energy minimization"_minimize.html is
the "fix box/relax"_fix_box_relax.html command.
A third use is to shear a bulk solid to study the response of the
@ -1032,6 +1030,10 @@ profile consistent with the applied shear strain rate.
An alternative method for calculating viscosities is provided via the
"fix viscosity"_fix_viscosity.html command.
NEMD simulations can also be used to measure transport properties of a fluid
through a pore or channel. Simulations of steady-state flow can be performed
using the "fix flow/gauss"_fix_flow_gauss.html command.
:line
6.14 Finite-size spherical and aspherical particles :link(howto_14),h4
@ -1392,7 +1394,7 @@ custom"_dump.html command.
There is also a "dump local"_dump.html format where the user specifies
what local values to output. A pre-defined index keyword can be
specified to enumuerate the local values. Two additional kinds of
specified to enumerate the local values. Two additional kinds of
keywords can also be specified (c_ID, f_ID), where a
"compute"_compute.html or "fix"_fix.html or "variable"_variable.html
provides the values to be output. In each case, the compute or fix
@ -1525,7 +1527,7 @@ Variables that generate values to output :h5,link(variable)
"Variables"_variable.html defined in an input script can store one or
more strings. But equal-style, vector-style, and atom-style or
atomfile-style variables generate a global scalar value, global vector
or values, or a per-atom vector, resepctively, when accessed. The
or values, or a per-atom vector, respectively, when accessed. The
formulas used to define these variables can contain references to the
thermodynamic keywords and to global and per-atom data generated by
computes, fixes, and other variables. The values generated by
@ -1585,7 +1587,7 @@ Temperature is computed as kinetic energy divided by some number of
degrees of freedom (and the Boltzmann constant). Since kinetic energy
is a function of particle velocity, there is often a need to
distinguish between a particle's advection velocity (due to some
aggregate motiion of particles) and its thermal velocity. The sum of
aggregate motion of particles) and its thermal velocity. The sum of
the two is the particle's total velocity, but the latter is often what
is wanted to compute a temperature.
@ -1640,14 +1642,14 @@ nvt/asphere"_fix_nvt_asphere.html thermostat not only translation
velocities but also rotational velocities for spherical and aspherical
particles.
DPD thermostatting alters pairwise interactions in a manner analagous
DPD thermostatting alters pairwise interactions in a manner analogous
to the per-particle thermostatting of "fix
langevin"_fix_langevin.html.
Any of the thermostatting fixes can use temperature computes that
remove bias which has two effects. First, the current calculated
temperature, which is compared to the requested target temperature, is
caluclated with the velocity bias removed. Second, the thermostat
calculated with the velocity bias removed. Second, the thermostat
adjusts only the thermal temperature component of the particle's
velocities, which are the velocities with the bias removed. The
removed bias is then added back to the adjusted velocities. See the
@ -1684,7 +1686,7 @@ nph) and Berendsen:
The "fix npt"_fix_nh.html commands include a Nose-Hoover thermostat
and barostat. "Fix nph"_fix_nh.html is just a Nose/Hoover barostat;
it does no thermostatting. Both "fix nph"_fix_nh.html and "fix
press/bernendsen"_fix_press_berendsen.html can be used in conjunction
press/berendsen"_fix_press_berendsen.html can be used in conjunction
with any of the thermostatting fixes.
As with the thermostats, "fix npt"_fix_nh.html and "fix
@ -1834,7 +1836,7 @@ the deformation must be chosen judiciously, and care must be taken to
fully equilibrate the deformed cell before sampling the stress
tensor. Another approach is to sample the triclinic cell fluctuations
that occur in an NPT simulation. This method can also be slow to
converge and requires careful post-processing "(Shinoda)"_#Shinoda
converge and requires careful post-processing "(Shinoda)"_#Shinoda1
:line
@ -1888,7 +1890,7 @@ instances of LAMMPS to perform different calculations.
The lammps_open_no_mpi() function is similar except that no MPI
communicator is passed from the caller. Instead, MPI_COMM_WORLD is
used to instantiate LAMMPS, and MPI is initialzed if necessary.
used to instantiate LAMMPS, and MPI is initialized if necessary.
The lammps_close() function is used to shut down an instance of LAMMPS
and free all its memory.
@ -1957,9 +1959,12 @@ The extract functions return a pointer to various global or per-atom
quantities stored in LAMMPS or to values calculated by a compute, fix,
or variable. The pointer returned by the extract_global() function
can be used as a permanent reference to a value which may change. For
the other extract functions, the underlying storage may be reallocated
as LAMMPS runs, so you need to re-call the function to assure a
current pointer or returned value(s).
the extract_atom() method, see the extract() method in the
src/atom.cpp file for a list of valid per-atom properties. New names
could easily be added if the property you want is not listed. For the
other extract functions, the underlying storage may be reallocated as
LAMMPS runs, so you need to re-call the function to assure a current
pointer or returned value(s).
The lammps_reset_box() function resets the size and shape of the
simulation box, e.g. as part of restoring a previously extracted and
@ -1975,11 +1980,20 @@ keyword as a double precision value.
The lammps_get_natoms() function returns the total number of atoms in
the system and can be used by the caller to allocate space for the
lammps_gather_atoms() and lammps_scatter_atoms() functions. The
gather function collects atom info of the requested type (atom coords,
types, forces, etc) from all procsesors, orders them by atom ID, and
returns a full list to each calling processor. The scatter function
does the inverse. It distributes the same kinds of values,
gather function collects peratom info of the requested type (atom
coords, types, forces, etc) from all processors, orders them by atom
ID, and returns a full list to each calling processor. The scatter
function does the inverse. It distributes the same peratom values,
passed by the caller, to each atom owned by individual processors.
Both methods are thus a means to extract or assign (overwrite) any
peratom quantities within LAMMPS. See the extract() method in the
src/atom.cpp file for a list of valid per-atom properties. New names
could easily be added if the property you want is not listed.
A special treatment is applied for accessing image flags via the
"image" property. Image flags are stored in a packed format with all
three image flags stored in a single integer. When signaling to access
the image flags as 3 individual values per atom instead of 1, the data
is transparently packed or unpacked by the library interface.
The lammps_create_atoms() function takes a list of N atoms as input
with atom types and coords (required), an optionally atom IDs and
@ -2013,7 +2027,7 @@ a simple Lennard-Jones fluid model. Also, see "this
section"_Section_howto.html#howto_21 of the manual for an analogous
discussion for viscosity.
The thermal conducitivity tensor kappa is a measure of the propensity
The thermal conductivity tensor kappa is a measure of the propensity
of a material to transmit heat energy in a diffusive manner as given
by Fourier's law
@ -2099,7 +2113,7 @@ and grad(Vstream) is the spatial gradient of the velocity of the fluid
moving in another direction, normal to the area through which the
momentum flows. Viscosity thus has units of pressure-time.
The first method is to perform a non-equlibrium MD (NEMD) simulation
The first method is to perform a non-equilibrium MD (NEMD) simulation
by shearing the simulation box via the "fix deform"_fix_deform.html
command, and using the "fix nvt/sllod"_fix_nvt_sllod.html command to
thermostat the fluid via the SLLOD equations of motion.
@ -2125,7 +2139,7 @@ the rNEMD algorithm of Muller-Plathe. Momentum in one dimension is
swapped between atoms in two different layers of the simulation box in
a different dimension. This induces a velocity gradient which can be
monitored with the "fix ave/chunk"_fix_ave_chunk.html command.
The fix tallies the cummulative momentum transfer that it performs.
The fix tallies the cumulative momentum transfer that it performs.
See the "fix viscosity"_fix_viscosity.html command for details.
The fourth method is based on the Green-Kubo (GK) formula which
@ -2268,7 +2282,7 @@ atoms with same local defect structure | chunk ID = output of "compute centro/at
Note that chunk IDs are integer values, so for atom properties or
computes that produce a floating point value, they will be truncated
to an integer. You could also use the compute in a variable that
scales the floating point value to spread it across multiple intergers.
scales the floating point value to spread it across multiple integers.
Spatial bins can be of various kinds, e.g. 1d bins = slabs, 2d bins =
pencils, 3d bins = boxes, spherical bins, cylindrical bins.
@ -2353,7 +2367,7 @@ largest cluster or fastest diffusing molecule. :l
Example calculations with chunks :h5
Here are eaxmples using chunk commands to calculate various
Here are examples using chunk commands to calculate various
properties:
(1) Average velocity in each of 1000 2d spatial bins:
@ -2424,7 +2438,7 @@ which both have their up- and downsides.
The first approach is to set desired real-space an kspace accuracies
via the {kspace_modify force/disp/real} and {kspace_modify
force/disp/kspace} commands. Note that the accuracies have to be
specified in force units and are thus dependend on the chosen unit
specified in force units and are thus dependent on the chosen unit
settings. For real units, 0.0001 and 0.002 seem to provide reasonable
accurate and efficient computations for the real-space and kspace
accuracies. 0.002 and 0.05 work well for most systems using lj
@ -2444,7 +2458,7 @@ performance. This approach provides a fast initialization of the
simulation. However, it is sensitive to errors: A combination of
parameters that will perform well for one system might result in
far-from-optimal conditions for other simulations. For example,
parametes that provide accurate and fast computations for
parameters that provide accurate and fast computations for
all-atomistic force fields can provide insufficient accuracy or
united-atomistic force fields (which is related to that the latter
typically have larger dispersion coefficients).
@ -2478,7 +2492,7 @@ arithmetic mixing rule substantially increases the computational cost.
The computational overhead can be reduced using the {kspace_modify
mix/disp geom} and {kspace_modify splittol} commands. The first
command simply enforces geometric mixing of the dispersion
coeffiecients in kspace computations. This introduces some error in
coefficients in kspace computations. This introduces some error in
the computations but will also significantly speed-up the
simulations. The second keyword sets the accuracy with which the
dispersion coefficients are approximated using a matrix factorization
@ -2497,7 +2511,7 @@ to specify this command explicitly.
6.25 Polarizable models :link(howto_25),h4
In polarizable force fields the charge distributions in molecules and
materials respond to their electrostatic environements. Polarizable
materials respond to their electrostatic environments. Polarizable
systems can be simulated in LAMMPS using three methods:
the fluctuating charge method, implemented in the "QEQ"_fix_qeq.html
@ -2551,7 +2565,7 @@ this is done by "fix qeq/dynamic"_fix_qeq.html, and for the
charge-on-spring models by the methods outlined in the next two
sections. The assignment of masses to the additional degrees of
freedom can lead to unphysical trajectories if care is not exerted in
choosing the parameters of the poarizable models and the simulation
choosing the parameters of the polarizable models and the simulation
conditions.
In the core-shell model the vibration of the shells is kept faster
@ -2573,7 +2587,7 @@ well.
6.26 Adiabatic core/shell model :link(howto_26),h4
The adiabatic core-shell model by "Mitchell and
Finchham"_#MitchellFinchham is a simple method for adding
Fincham"_#MitchellFincham is a simple method for adding
polarizability to a system. In order to mimic the electron shell of
an ion, a satellite particle is attached to it. This way the ions are
split into a core and a shell where the latter is meant to react to
@ -2667,13 +2681,16 @@ bond_coeff 1 63.014 0.0
bond_coeff 2 25.724 0.0 :pre
When running dynamics with the adiabatic core/shell model, the
following issues should be considered. Since the relative motion of
the core and shell particles corresponds to the polarization, typical
thermostats can alter the polarization behaviour, meaning the shell
will not react freely to its electrostatic environment. This is
critical during the equilibration of the system. Therefore
it's typically desirable to decouple the relative motion of the
core/shell pair, which is an imaginary degree of freedom, from the
following issues should be considered. The relative motion of
the core and shell particles corresponds to the polarization,
hereby an instantaneous relaxation of the shells is approximated
and a fast core/shell spring frequency ensures a nearly constant
internal kinetic energy during the simulation.
Thermostats can alter this polarization behaviour, by scaling the
internal kinetic energy, meaning the shell will not react freely to
its electrostatic environment.
Therefore it is typically desirable to decouple the relative motion of
the core/shell pair, which is an imaginary degree of freedom, from the
real physical system. To do that, the "compute
temp/cs"_compute_temp_cs.html command can be used, in conjunction with
any of the thermostat fixes, such as "fix nvt"_fix_nh.html or "fix
@ -2704,44 +2721,54 @@ fix thermostatequ all nve # integrator as needed f
fix_modify thermoberendsen temp CSequ
thermo_modify temp CSequ # output of center-of-mass derived temperature :pre
The pressure for the core/shell system is computed via the regular
LAMMPS convention by "treating the cores and shells as individual
particles"_#MitchellFincham2. For the thermo output of the pressure
as well as for the application of a barostat, it is necessary to
use an additional "pressure"_compute_pressure compute based on the
default "temperature"_compute_temp and specifying it as a second
argument in "fix modify"_fix_modify.html and
"thermo_modify"_thermo_modify.html resulting in:
(...)
compute CSequ all temp/cs cores shells
compute thermo_press_lmp all pressure thermo_temp # pressure for individual particles
thermo_modify temp CSequ press thermo_press_lmp # modify thermo to regular pressure
fix press_bar all npt temp 300 300 0.04 iso 0 0 0.4
fix_modify press_bar temp CSequ press thermo_press_lmp # pressure modification for correct kinetic scalar :pre
If "compute temp/cs"_compute_temp_cs.html is used, the decoupled
relative motion of the core and the shell should in theory be
stable. However numerical fluctuation can introduce a small
momentum to the system, which is noticable over long trajectories.
Therefore it is recomendable to use the "fix
Therefore it is recommendable to use the "fix
momentum"_fix_momentum.html command in combination with "compute
temp/cs"_compute_temp_cs.html when equilibrating the system to
prevent any drift.
When intializing the velocities of a system with core/shell pairs, it
When initializing the velocities of a system with core/shell pairs, it
is also desirable to not introduce energy into the relative motion of
the core/shell particles, but only assign a center-of-mass velocity to
the pairs. This can be done by using the {bias} keyword of the
"velocity create"_velocity.html command and assigning the "compute
temp/cs"_compute_temp_cs.html command to the {temp} keyword of the
"velocity"_velocity.html commmand, e.g.
"velocity"_velocity.html command, e.g.
velocity all create 1427 134 bias yes temp CSequ
velocity all scale 1427 temp CSequ :pre
It is important to note that the polarizability of the core/shell
pairs is based on their relative motion. Therefore the choice of
spring force and mass ratio need to ensure much faster relative motion
of the 2 atoms within the core/shell pair than their center-of-mass
velocity. This allow the shells to effectively react instantaneously
to the electrostatic environment. This fast movement also limits the
timestep size that can be used.
To maintain the correct polarizability of the core/shell pairs, the
kinetic energy of the internal motion shall remain nearly constant.
Therefore the choice of spring force and mass ratio need to ensure
much faster relative motion of the 2 atoms within the core/shell pair
than their center-of-mass velocity. This allows the shells to
effectively react instantaneously to the electrostatic environment and
limits energy transfer to or from the core/shell oscillators.
This fast movement also dictates the timestep that can be used.
The primary literature of the adiabatic core/shell model suggests that
the fast relative motion of the core/shell pairs only allows negligible
energy transfer to the environment. Therefore it is not intended to
decouple the core/shell degree of freedom from the physical system
during production runs. In other words, the "compute
temp/cs"_compute_temp_cs.html command should not be used during
production runs and is only required during equilibration. This way one
is consistent with literature (based on the code packages DL_POLY or
GULP for instance).
energy transfer to the environment.
The mentioned energy transfer will typically lead to a small drift
in total energy over time. This internal energy can be monitored
using the "compute chunk/atom"_compute_chunk_atom.html and "compute
@ -2761,14 +2788,20 @@ command, to use as input to the "compute
chunk/atom"_compute_chunk_atom.html command to define the core/shell
pairs as chunks.
For example,
For example if core/shell pairs are the only molecules:
read_data NaCl_CS_x0.1_prop.data
compute prop all property/atom molecule
compute cs_chunk all chunk/atom c_prop
compute cstherm all temp/chunk cs_chunk temp internal com yes cdof 3.0 # note the chosen degrees of freedom for the core/shell pairs
fix ave_chunk all ave/time 10 1 10 c_cstherm file chunk.dump mode vector :pre
For example if core/shell pairs and other molecules are present:
fix csinfo all property/atom i_CSID # property/atom command
read_data NaCl_CS_x0.1_prop.data fix csinfo NULL CS-Info # atom property added in the data-file
compute prop all property/atom i_CSID
compute cs_chunk all chunk/atom c_prop
compute cstherm all temp/chunk cs_chunk temp internal com yes cdof 3.0 # note the chosen degrees of freedom for the core/shell pairs
fix ave_chunk all ave/time 10 1 10 c_cstherm file chunk.dump mode vector :pre
(...) :pre
The additional section in the date file would be formatted like this:
@ -2789,7 +2822,7 @@ CS-Info # header of additional section :pre
6.27 Drude induced dipoles :link(howto_27),h4
The thermalized Drude model, similarly to the "core-shell"_#howto_26
model, representes induced dipoles by a pair of charges (the core atom
model, represents induced dipoles by a pair of charges (the core atom
and the Drude particle) connected by a harmonic spring. The Drude
model has a number of features aimed at its use in molecular systems
("Lamoureux and Roux"_#howto-Lamoureux):
@ -2880,19 +2913,23 @@ Fischer, Gao, Guo, Ha, et al, J Phys Chem, 102, 3586 (1998).
[(Mayo)] Mayo, Olfason, Goddard III, J Phys Chem, 94, 8897-8909
(1990).
:link(Jorgensen)
:link(Jorgensen1)
[(Jorgensen)] Jorgensen, Chandrasekhar, Madura, Impey, Klein, J Chem
Phys, 79, 926 (1983).
:link(Price)
:link(Price1)
[(Price)] Price and Brooks, J Chem Phys, 121, 10096 (2004).
:link(Shinoda)
:link(Shinoda1)
[(Shinoda)] Shinoda, Shiga, and Mikami, Phys Rev B, 69, 134103 (2004).
:link(MitchellFinchham)
[(Mitchell and Finchham)] Mitchell, Finchham, J Phys Condensed Matter,
:link(MitchellFincham)
[(Mitchell and Fincham)] Mitchell, Fincham, J Phys Condensed Matter,
5, 1031-1038 (1993).
:link(MitchellFincham2)
[(Fincham)] Fincham, Mackrodt and Mitchell, J Phys Condensed Matter,
6, 393-404 (1994).
:link(howto-Lamoureux)
[(Lamoureux and Roux)] G. Lamoureux, B. Roux, J. Chem. Phys 119, 3025 (2003)

View File

@ -338,15 +338,13 @@ dynamics timestepping, particularly if the computations are not
parallel, so it is often better to leave such analysis to
post-processing codes.
A very simple (yet fast) visualizer is provided with the LAMMPS
package - see the "xmovie"_Section_tools.html#xmovie tool in "this
section"_Section_tools.html. It creates xyz projection views of
atomic coordinates and animates them. We find it very useful for
debugging purposes. For high-quality visualization we recommend the
For high-quality visualization we recommend the
following packages:
"VMD"_http://www.ks.uiuc.edu/Research/vmd
"AtomEye"_http://mt.seas.upenn.edu/Archive/Graphics/A
"OVITO"_http://www.ovito.org/
"ParaView"_http://www.paraview.org/
"PyMol"_http://www.pymol.org
"Raster3d"_http://www.bmsc.washington.edu/raster3d/raster3d.html
"RasMol"_http://www.openrasmol.org :ul

View File

@ -159,17 +159,17 @@ pack_comm_vel: add velocity info to communication buffer (required)
pack_comm_hybrid: store extra info unique to this atom style (optional)
unpack_comm: retrieve an atom's info from the buffer (required)
unpack_comm_vel: also retrieve velocity info (required)
unpack_comm_hybrid: retreive extra info unique to this atom style (optional)
unpack_comm_hybrid: retrieve extra info unique to this atom style (optional)
pack_reverse: store an atom's info in a buffer communicating partial forces (required)
pack_reverse_hybrid: store extra info unique to this atom style (optional)
unpack_reverse: retrieve an atom's info from the buffer (required)
unpack_reverse_hybrid: retreive extra info unique to this atom style (optional)
unpack_reverse_hybrid: retrieve extra info unique to this atom style (optional)
pack_border: store an atom's info in a buffer communicated on neighbor re-builds (required)
pack_border_vel: add velocity info to buffer (required)
pack_border_hybrid: store extra info unique to this atom style (optional)
unpack_border: retrieve an atom's info from the buffer (required)
unpack_border_vel: also retrieve velocity info (required)
unpack_border_hybrid: retreive extra info unique to this atom style (optional)
unpack_border_hybrid: retrieve extra info unique to this atom style (optional)
pack_exchange: store all an atom's info to migrate to another processor (required)
unpack_exchange: retrieve an atom's info from the buffer (required)
size_restart: number of restart quantities associated with proc's atoms (required)
@ -369,7 +369,7 @@ pre_force_respa: same as pre_force, but for rRESPA (optional)
post_force_respa: same as post_force, but for rRESPA (optional)
final_integrate_respa: same as final_integrate, but for rRESPA (optional)
min_pre_force: called after pair & molecular forces are computed in minimizer (optional)
min_post_force: called after pair & molecular forces are computed and communicated in minmizer (optional)
min_post_force: called after pair & molecular forces are computed and communicated in minimizer (optional)
min_store: store extra data for linesearch based minimization on a LIFO stack (optional)
min_pushstore: push the minimization LIFO stack one element down (optional)
min_popstore: pop the minimization LIFO stack one element up (optional)
@ -517,7 +517,7 @@ class. See region.h for details.
inside: determine whether a point is in the region
surface_interior: determine if a point is within a cutoff distance inside of surc
surface_exterior: determine if a point is within a cutoff distance outside of surf
shape_update : change region shape if set by time-depedent variable :tb(s=:)
shape_update : change region shape if set by time-dependent variable :tb(s=:)
:line
@ -601,16 +601,16 @@ Adding keywords for the "thermo_style custom"_thermo_style.html command
"here"_Section_modify.html#mod_13 on this page.
Adding a new math function of one or two arguments can be done by
editing one section of the Variable::evaulate() method. Search for
editing one section of the Variable::evaluate() method. Search for
the word "customize" to find the appropriate location.
Adding a new group function can be done by editing one section of the
Variable::evaulate() method. Search for the word "customize" to find
Variable::evaluate() method. Search for the word "customize" to find
the appropriate location. You may need to add a new method to the
Group class as well (see the group.cpp file).
Accessing a new atom-based vector can be done by editing one section
of the Variable::evaulate() method. Search for the word "customize"
of the Variable::evaluate() method. Search for the word "customize"
to find the appropriate location.
Adding new "compute styles"_compute.html (whose calculated values can
@ -740,7 +740,7 @@ entry to add to the USER-MISC/README file in that dir, along with the
contribute several individual features. :l
If you want your contribution to be added as a user-contribution and
it is several related featues, it is probably best to make it a user
it is several related features, it is probably best to make it a user
package directory with a name like USER-FOO. In addition to your new
files, the directory should contain a README text file. The README
should contain your name and contact information and a brief
@ -785,10 +785,10 @@ file for how to format the cite itself. The "Restrictions" section of
the doc page should indicate that your command is only available if
LAMMPS is built with the appropriate USER-MISC or USER-FOO package.
See other user package doc files for examples of how to do this. The
prerequiste for building the HTML format files are Python 3.x and
prerequisite for building the HTML format files are Python 3.x and
virtualenv, the requirement for generating the PDF format manual
is the "htmldoc"_http://www.htmldoc.org/ software. Please run at least
"make html" and carefully inspect and proofread the resuling HTML format
"make html" and carefully inspect and proofread the resulting HTML format
doc page before submitting your code. :l
For a new package (or even a single command) you should include one or

View File

@ -84,7 +84,7 @@ Package, Description, Author(s), Doc page, Example, Library
"PERI"_#PERI, Peridynamics models, Mike Parks (Sandia), "pair_style peri"_pair_peri.html, peri, -
"POEMS"_#POEMS, coupled rigid body motion, Rudra Mukherjee (JPL), "fix poems"_fix_poems.html, rigid, lib/poems
"PYTHON"_#PYTHON, embed Python code in an input script, -, "python"_python.html, python, lib/python
"REAX"_#REAX, ReaxFF potential, Aidan Thompson (Sandia), "pair_style reax"_pair_reax.html, reax, lib/reax
"REAX"_#REAX, ReaxFF potential, Aidan Thompson (Sandia), "pair_style reax"_pair_reax.html, reax, lib/reax
"REPLICA"_#REPLICA, multi-replica methods, -, "Section 6.6.5"_Section_howto.html#howto_5, tad, -
"RIGID"_#RIGID, rigid bodies, -, "fix rigid"_fix_rigid.html, rigid, -
"SHOCK"_#SHOCK, shock loading methods, -, "fix msst"_fix_msst.html, -, -
@ -94,7 +94,7 @@ Package, Description, Author(s), Doc page, Example, Library
:tb(ea=c)
The "Authors" column lists a name(s) if a specific person is
responible for creating and maintaining the package.
responsible for creating and maintaining the package.
(1) The COLLOID package includes Fast Lubrication Dynamics pair styles
which were created by Amit Kumar and Michael Bybee from Jonathan
@ -462,7 +462,7 @@ options you are optimizing for: CPU acceleration via OpenMP, GPU
acceleration, or Intel Xeon Phi. (You can build multiple times to
create LAMMPS executables for different hardware.) It also requires a
C++11 compatible compiler. For GPUs, the NVIDIA "nvcc" compiler is
used, and an appopriate KOKKOS_ARCH setting should be made in your
used, and an appropriate KOKKOS_ARCH setting should be made in your
Makefile.machine for your GPU hardware and NVIDIA software.
The simplest way to do this is to use Makefile.kokkos_cuda or
@ -955,8 +955,8 @@ multi-replica simulations in LAMMPS. Multi-replica methods included
in the package are nudged elastic band (NEB), parallel replica
dynamics (PRD), temperature accelerated dynamics (TAD), parallel
tempering, and a verlet/split algorithm for performing long-range
Coulombics on one set of processors, and the remainded of the force
field calcalation on another set.
Coulombics on one set of processors, and the remainder of the force
field calculation on another set.
To install via make or Make.py:
@ -1140,6 +1140,7 @@ Package, Description, Author(s), Doc page, Example, Pic/movie, Library
"USER-ATC"_#USER-ATC, atom-to-continuum coupling, Jones & Templeton & Zimmerman (1), "fix atc"_fix_atc.html, USER/atc, "atc"_atc, lib/atc
"USER-AWPMD"_#USER-AWPMD, wave-packet MD, Ilya Valuev (JIHT), "pair_style awpmd/cut"_pair_awpmd.html, USER/awpmd, -, lib/awpmd
"USER-CG-CMM"_#USER-CG-CMM, coarse-graining model, Axel Kohlmeyer (Temple U), "pair_style lj/sdk"_pair_sdk.html, USER/cg-cmm, "cg"_cg, -
"USER-CGDNA"_#USER-CGDNA, coarse-grained DNA force fields, Oliver Henrich (U Strathclyde Glasgow), src/USER-CGDNA/README, USER/cgdna, -, -
"USER-COLVARS"_#USER-COLVARS, collective variables, Fiorin & Henin & Kohlmeyer (2), "fix colvars"_fix_colvars.html, USER/colvars, "colvars"_colvars, lib/colvars
"USER-DIFFRACTION"_#USER-DIFFRACTION, virutal x-ray and electron diffraction, Shawn Coleman (ARL),"compute xrd"_compute_xrd.html, USER/diffraction, -, -
"USER-DPD"_#USER-DPD, reactive dissipative particle dynamics (DPD), Larentzos & Mattox & Brennan (5), src/USER-DPD/README, USER/dpd, -, -
@ -1153,7 +1154,7 @@ Package, Description, Author(s), Doc page, Example, Pic/movie, Library
"USER-MISC"_#USER-MISC, single-file contributions, USER-MISC/README, USER-MISC/README, -, -, -
"USER-MANIFOLD"_#USER-MANIFOLD, motion on 2d surface, Stefan Paquay (Eindhoven U of Technology), "fix manifoldforce"_fix_manifoldforce.html, USER/manifold, "manifold"_manifold, -
"USER-MOLFILE"_#USER-MOLFILE, "VMD"_VMD molfile plug-ins, Axel Kohlmeyer (Temple U), "dump molfile"_dump_molfile.html, -, -, VMD-MOLFILE
"USER-NC-DUMP"_#USER-NC-DUMP, dump output via NetCDF, Lars Pastewka (Karlsruhe Institute of Technology, KIT), "dump nc, dump nc/mpiio"_dump_nc.html, -, -, lib/netcdf
"USER-NC-DUMP"_#USER-NC-DUMP, dump output via NetCDF, Lars Pastewka (Karlsruhe Institute of Technology, KIT), "dump nc / dump nc/mpiio"_dump_nc.html, -, -, lib/netcdf
"USER-OMP"_#USER-OMP, OpenMP threaded styles, Axel Kohlmeyer (Temple U), "Section 5.3.4"_accelerate_omp.html, -, -, -
"USER-PHONON"_#USER-PHONON, phonon dynamical matrix, Ling-Ti Kong (Shanghai Jiao Tong U), "fix phonon"_fix_phonon.html, USER/phonon, -, -
"USER-QMMM"_#USER-QMMM, QM/MM coupling, Axel Kohlmeyer (Temple U), "fix qmmm"_fix_qmmm.html, USER/qmmm, -, lib/qmmm
@ -1175,7 +1176,7 @@ Package, Description, Author(s), Doc page, Example, Pic/movie, Library
:link(VMD,http://www.ks.uiuc.edu/Research/vmd)
The "Authors" column lists a name(s) if a specific person is
responible for creating and maintaining the package.
responsible for creating and maintaining the package.
(1) The ATC package was created by Reese Jones, Jeremy Templeton, and
Jon Zimmerman (Sandia).
@ -1284,6 +1285,35 @@ him directly if you have questions.
:line
USER-CGDNA package :link(USER-CGDNA),h5
Contents: The CGDNA package implements coarse-grained force fields for
single- and double-stranded DNA. These are at the moment mainly the
oxDNA and oxDNA2 models, developed by Doye, Louis and Ouldridge at the University
of Oxford. The package also contains Langevin-type rigid-body
integrators with improved stability.
See these doc pages to get started:
"bond_style oxdna/fene"_bond_oxdna.html
"bond_style oxdna2/fene"_bond_oxdna.html
"pair_style oxdna/..."_pair_oxdna.html
"pair_style oxdna2/..."_pair_oxdna2.html
"fix nve/dotc/langevin"_fix_nve_dotc_langevin.html :ul
Supporting info: /src/USER-CGDNA/README, "bond_style
oxdna/fene"_bond_oxdna.html, "bond_style
oxdna2/fene"_bond_oxdna.html, "pair_style
oxdna/..."_pair_oxdna.html, "pair_style
oxdna2/..."_pair_oxdna2.html, "fix
nve/dotc/langevin"_fix_nve_dotc_langevin.html
Author: Oliver Henrich at the University of Strathclyde, Glasgow, UK and
University of Edinburgh (ohenrich@ph.ed.ac.uk).
Contact him directly if you have any questions.
:line
USER-COLVARS package :link(USER-COLVARS),h5
Contents: COLVARS stands for collective variables which can be used to
@ -1610,11 +1640,12 @@ and a "dump nc/mpiio"_dump_nc.html command to output LAMMPS snapshots
in this format. See src/USER-NC-DUMP/README for more details.
NetCDF files can be directly visualized with the following tools:
Ovito (http://www.ovito.org/). Ovito supports the AMBER convention
and all of the above extensions. :ulb,l
and all of the above extensions. :ulb,l
VMD (http://www.ks.uiuc.edu/Research/vmd/) :l
AtomEye (http://www.libatoms.org/). The libAtoms version of AtomEye contains
a NetCDF reader that is not present in the standard distribution of AtomEye :l,ule
a NetCDF reader that is not present in the standard distribution of AtomEye :l,ule
The person who created these files is Lars Pastewka at
Karlsruhe Institute of Technology (lars.pastewka at kit.edu).
@ -1751,7 +1782,7 @@ particularly with respect to the charge equilibration calculation. It
should also be easier to build and use since there are no complicating
issues with Fortran memory allocation or linking to a Fortran library.
For technical details about this implemention of ReaxFF, see
For technical details about this implementation of ReaxFF, see
this paper:
Parallel and Scalable Reactive Molecular Dynamics: Numerical Methods
@ -1821,7 +1852,7 @@ See this doc page to get started:
The persons who created the USER-SMTBQ package are Nicolas Salles,
Emile Maras, Olivier Politano, Robert Tetot, who can be contacted at
these email addreses: lammps@u-bourgogne.fr, nsalles@laas.fr. Contact
these email addresses: lammps@u-bourgogne.fr, nsalles@laas.fr. Contact
them directly if you have any questions.
Examples: examples/USER/smtbq

View File

@ -69,7 +69,7 @@ bench/in.lj input script.
For all the benchmarks, a useful metric is the CPU cost per atom per
timestep. Since performance scales roughly linearly with problem size
and timesteps for all LAMMPS models (i.e. inteatomic or coarse-grained
and timesteps for all LAMMPS models (i.e. interatomic or coarse-grained
potentials), the run time of any problem using the same model (atom
style, force field, cutoff, etc) can then be estimated.

View File

@ -97,7 +97,7 @@ current LAMMPS library interface and how to call them from Python.
Section 11.8 gives some examples of coupling LAMMPS to other tools via
Python. For example, LAMMPS can easily be coupled to a GUI or other
visualization tools that display graphs or animations in real time as
LAMMPS runs. Examples of such scripts are inlcluded in the python
LAMMPS runs. Examples of such scripts are included in the python
directory.
Two advantages of using Python to run LAMMPS are how concise the
@ -177,7 +177,7 @@ of Python and your machine to successfully build LAMMPS. See the
lib/python/README file for more info.
If you want to write Python code with callbacks to LAMMPS, then you
must also follow the steps overviewed in the preceeding section (11.1)
must also follow the steps overviewed in the preceding section (11.1)
for running LAMMPS from Python. I.e. you must build LAMMPS as a
shared library and insure that Python can find the python/lammps.py
file and the shared library.
@ -325,7 +325,7 @@ sudo python setup.py install :pre
Again, the "sudo" is only needed if required to copy PyPar files into
your Python distribution's site-packages directory.
If you have successully installed PyPar, you should be able to run
If you have successfully installed PyPar, you should be able to run
Python and type
import pypar :pre
@ -369,7 +369,7 @@ user privilege into the user local directory type
python setup.py install --user :pre
If you have successully installed mpi4py, you should be able to run
If you have successfully installed mpi4py, you should be able to run
Python and type
from mpi4py import MPI :pre
@ -594,10 +594,10 @@ flag = lmp.set_variable(name,value) # set existing named string-style vari
value = lmp.get_thermo(name) # return current value of a thermo keyword
natoms = lmp.get_natoms() # total # of atoms as int
data = lmp.gather_atoms(name,type,count) # return atom attribute of all atoms gathered into data, ordered by atom ID
data = lmp.gather_atoms(name,type,count) # return per-atom property of all atoms gathered into data, ordered by atom ID
# name = "x", "charge", "type", etc
# count = # of per-atom values, 1 or 3, etc
lmp.scatter_atoms(name,type,count,data) # scatter atom attribute of all atoms from data, ordered by atom ID
lmp.scatter_atoms(name,type,count,data) # scatter per-atom property to all atoms from data, ordered by atom ID
# name = "x", "charge", "type", etc
# count = # of per-atom values, 1 or 3, etc :pre
@ -610,7 +610,7 @@ lmp = lammps() :pre
create an instance of LAMMPS, wrapped in a Python class by the lammps
Python module, and return an instance of the Python class as lmp. It
is used to make all subequent calls to the LAMMPS library.
is used to make all subsequent calls to the LAMMPS library.
Additional arguments to lammps() can be used to tell Python the name
of the shared library to load or to pass arguments to the LAMMPS
@ -656,13 +656,13 @@ argument.
For extract_atom(), a pointer to internal LAMMPS atom-based data is
returned, which you can use via normal Python subscripting. See the
extract() method in the src/atom.cpp file for a list of valid names.
Again, new names could easily be added. A pointer to a vector of
doubles or integers, or a pointer to an array of doubles (double **)
or integers (int **) is returned. You need to specify the appropriate
data type via the type argument.
Again, new names could easily be added if the property you want is not
listed. A pointer to a vector of doubles or integers, or a pointer to
an array of doubles (double **) or integers (int **) is returned. You
need to specify the appropriate data type via the type argument.
For extract_compute() and extract_fix(), the global, per-atom, or
local data calulated by the compute or fix can be accessed. What is
local data calculated by the compute or fix can be accessed. What is
returned depends on whether the compute or fix calculates a scalar or
vector or array. For a scalar, a single double value is returned. If
the compute or fix calculates a vector or array, a pointer to the
@ -689,12 +689,21 @@ specified group.
The get_natoms() method returns the total number of atoms in the
simulation, as an int.
The gather_atoms() method returns a ctypes vector of ints or doubles
as specified by type, of length count*natoms, for the property of all
the atoms in the simulation specified by name, ordered by count and
then by atom ID. The vector can be used via normal Python
subscripting. If atom IDs are not consecutively ordered within
LAMMPS, a None is returned as indication of an error.
The gather_atoms() method allows any per-atom property (coordinates,
velocities, etc) to be extracted from LAMMPS. It returns a ctypes
vector of ints or doubles as specified by type, of length
count*natoms, for the named property for all atoms in the simulation.
The data is ordered by count and then by atom ID. See the extract()
method in the src/atom.cpp file for a list of valid names. Again, new
names could easily be added if the property you want is missing. The
vector can be used via normal Python subscripting. If atom IDs are
not consecutively ordered within LAMMPS, a None is returned as
indication of an error. A special treatment is applied for image flags
stored in the "image" property. All three image flags are stored in
a packed format in a single integer, so count would be 1 to retrieve
that integer, however also a count value of 3 can be used and then
the image flags will be unpacked into 3 individual integers, ordered
in a similar fashion as coordinates.
Note that the data structure gather_atoms("x") returns is different
from the data structure returned by extract_atom("x") in four ways.
@ -711,14 +720,22 @@ assigning a new values to the extract_atom() array. To do this with
the gather_atoms() vector, you need to change values in the vector,
then invoke the scatter_atoms() method.
The scatter_atoms() method takes a vector of ints or doubles as
specified by type, of length count*natoms, for the property of all the
atoms in the simulation specified by name, ordered by bount and then
by atom ID. It uses the vector of data to overwrite the corresponding
properties for each atom inside LAMMPS. This requires LAMMPS to have
its "map" option enabled; see the "atom_modify"_atom_modify.html
command for details. If it is not, or if atom IDs are not
consecutively ordered, no coordinates are reset.
The scatter_atoms() method allows any per-atom property (coordinates,
velocities, etc) to be inserted into LAMMPS, overwriting the current
property. It takes a vector of ints or doubles as specified by type,
of length count*natoms, for the named property for all atoms in the
simulation. The data should be ordered by count and then by atom ID.
See the extract() method in the src/atom.cpp file for a list of valid
names. Again, new names could easily be added if the property you
want is missing. It uses the vector of data to overwrite the
corresponding properties for each atom inside LAMMPS. This requires
LAMMPS to have its "map" option enabled; see the
"atom_modify"_atom_modify.html command for details. If it is not, or
if atom IDs are not consecutively ordered, no coordinates are reset.
Similar as for gather_atoms() a special treatment is applied for image
flags, which can be provided in packed (count = 1) or unpacked (count = 3)
format and in the latter case, they will be packed before applied to
atoms.
The array of coordinates passed to scatter_atoms() must be a ctypes
vector of ints or doubles, allocated and initialized something like
@ -734,7 +751,7 @@ x\[2\] = z coord of atom with ID 1
x\[3\] = x coord of atom with ID 2
...
x\[n3-1\] = z coord of atom with ID natoms
lmp.scatter_coords("x",1,3,x) :pre
lmp.scatter_atoms("x",1,3,x) :pre
Alternatively, you can just change values in the vector returned by
gather_atoms("x",1,3), since it is a ctypes vector of doubles.
@ -774,7 +791,7 @@ demo.py, invoke various LAMMPS library interface routines,
simple.py, run in parallel, similar to examples/COUPLE/simple/simple.cpp,
split.py, same as simple.py but running in parallel on a subset of procs,
gui.py, GUI go/stop/temperature-slider to control LAMMPS,
plot.py, real-time temeperature plot with GnuPlot via Pizza.py,
plot.py, real-time temperature plot with GnuPlot via Pizza.py,
viz_tool.py, real-time viz via some viz package,
vizplotgui_tool.py, combination of viz_tool.py and plot.py and gui.py :tb(c=2)

View File

@ -80,7 +80,7 @@ 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.
@ -251,7 +251,7 @@ 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
@ -362,7 +362,7 @@ 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.
@ -413,7 +413,7 @@ uses (for performing 1d FFTs) when running the particle-particle
particle-mesh (PPPM) option for long-range Coulombics via the
"kspace_style"_kspace_style.html command.
LAMMPS supports various open-source or vendor-supplied FFT libraries
LAMMPS supports common open-source or vendor-supplied FFT libraries
for this purpose. If you leave these 3 variables blank, LAMMPS will
use the open-source "KISS FFT library"_http://kissfft.sf.net, which is
included in the LAMMPS distribution. This library is portable to all
@ -423,15 +423,14 @@ package in your build, you can also leave the 3 variables blank.
Otherwise, select which kinds of FFTs to use as part of the FFT_INC
setting by a switch of the form -DFFT_XXX. Recommended values for XXX
are: MKL, SCSL, FFTW2, and FFTW3. Legacy options are: INTEL, SGI,
ACML, and T3E. For backward compatability, using -DFFT_FFTW will use
the FFTW2 library. Using -DFFT_NONE will use the KISS library
described above.
are: MKL or FFTW3. FFTW2 and NONE are supported as legacy options.
Selecting -DFFT_FFTW will use the FFTW3 library and -DFFT_NONE will
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.
@ -451,7 +450,7 @@ you must also manually specify the correct library, namely -lsfftw or
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
@ -683,7 +682,7 @@ various make commands that can be used to manipulate 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
also type
lmp_machine -h :pre
@ -1009,7 +1008,7 @@ Instead, it creates src/MAKE/MINE/Makefile.auto, which you can save or
rename if desired. Likewise it creates an executable named
src/lmp_auto, which you can rename using the -o switch if desired.
The most recently executed Make.py commmand is saved in
The most recently executed Make.py command is saved in
src/Make.py.last. You can use the "-r" switch (for redo) to re-invoke
the last command, or you can save a sequence of one or more Make.py
commands to a file and invoke the file of commands using "-r". You
@ -1065,7 +1064,7 @@ 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.
@ -1417,8 +1416,8 @@ 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
@ -1482,7 +1481,7 @@ 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.
@ -1727,7 +1726,7 @@ thermodynamic state and a total run time for the simulation. It then
appends statistics about the CPU time and storage requirements for the
simulation. An example set of statistics is shown here:
Loop time of 2.81192 on 4 procs for 300 steps with 2004 atoms
Loop time of 2.81192 on 4 procs for 300 steps with 2004 atoms :pre
Performance: 18.436 ns/day 1.302 hours/ns 106.689 timesteps/s
97.0% CPU use with 4 MPI tasks x no OpenMP threads :pre
@ -1757,14 +1756,14 @@ Ave special neighs/atom = 2.34032
Neighbor list builds = 26
Dangerous builds = 0 :pre
The first section provides a global loop timing summary. The loop time
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
continuations required and for comparing performance with other,
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). Lower numbers correspond to delays due to file I/O or
insufficient thread utilization.
threads (or 1 of no OpenMP). Lower numbers correspond to delays due
to file I/O or insufficient thread utilization.
The MPI task section gives the breakdown of the CPU run time (in
seconds) into major categories:
@ -1791,7 +1790,7 @@ is present that also prints the CPU utilization in percent. In
addition, when using {timer full} and the "package omp"_package.html
command are active, a similar timing summary of time spent in threaded
regions to monitor thread utilization and load balance is provided. A
new entry is the {Reduce} section, which lists the time spend in
new entry is the {Reduce} section, which lists the time spent in
reducing the per-thread data elements to the storage for non-threaded
computation. These thread timings are taking from the first MPI rank
only and and thus, as the breakdown for MPI tasks can change from MPI

View File

@ -12,9 +12,12 @@ Section"_Section_modify.html :c
LAMMPS is designed to be a computational kernel for performing
molecular dynamics computations. Additional pre- and post-processing
steps are often necessary to setup and analyze a simulation. A few
additional tools are provided with the LAMMPS distribution and are
described in this section.
steps are often necessary to setup and analyze a simulation. A
list of such tools can be found on the LAMMPS home page
at "http://lammps.sandia.gov/prepost.html"_http://lammps.sandia.gov/prepost.html
A few additional tools are provided with the LAMMPS distribution
and are described in this section.
Our group has also written and released a separate toolkit called
"Pizza.py"_pizza which provides tools for doing setup, analysis,
@ -36,16 +39,16 @@ authors.
The source code for each of these codes is in the tools sub-directory
of the LAMMPS distribution. There is a Makefile (which you may need
to edit for your platform) which will build several of the tools which
reside in that directory. Some of them are larger packages in their
own sub-directories with their own Makefiles.
reside in that directory. Most of them are larger packages in their
own sub-directories with their own Makefiles and/or README files.
"amber2lmp"_#amber
"binary2txt"_#binary
"ch2lmp"_#charmm
"chain"_#chain
"colvars"_#colvars
"createatoms"_#create
"data2xmovie"_#data
"createatoms"_#createatoms
"drude"_#drude
"eam database"_#eamdb
"eam generate"_#eamgn
"eff"_#eff
@ -56,20 +59,18 @@ own sub-directories with their own Makefiles.
"kate"_#kate
"lmp2arc"_#arc
"lmp2cfg"_#cfg
"lmp2vmd"_#vmd
"matlab"_#matlab
"micelle2d"_#micelle
"moltemplate"_#moltemplate
"msi2lmp"_#msi
"phonon"_#phonon
"polymer bonding"_#polybond
"polybond"_#polybond
"pymol_asphere"_#pymol
"python"_#pythontools
"reax"_#reax_tool
"restart2data"_#restart
"smd"_#smd
"vim"_#vim
"xmgrace"_#xmgrace
"xmovie"_#xmovie :ul
:line
@ -158,7 +159,7 @@ gmail.com) at ICTP, Italy.
:line
createatoms tool :h4,link(create)
createatoms tool :h4,link(createatoms)
The tools/createatoms directory contains a Fortran program called
createAtoms.f which can generate a variety of interesting crystal
@ -171,16 +172,16 @@ The tool is authored by Xiaowang Zhou (Sandia), xzhou at sandia.gov.
:line
data2xmovie tool :h4,link(data)
drude tool :h4,link(drude)
The file data2xmovie.c converts a LAMMPS data file into a snapshot
suitable for visualizing with the "xmovie"_#xmovie tool, as if it had
been output with a dump command from LAMMPS itself. The syntax for
running the tool is
The tools/drude directory contains a Python script called
polarizer.py which can add Drude oscillators to a LAMMPS
data file in the required format.
data2xmovie \[options\] < infile > outfile :pre
See the header of the polarizer.py file for details.
See the top of the data2xmovie.c file for a discussion of the options.
The tool is authored by Agilio Padua and Alain Dequidt: agilio.padua
at univ-bpclermont.fr, alain.dequidt at univ-bpclermont.fr
:line
@ -317,18 +318,6 @@ This tool was written by Ara Kooser at Sandia (askoose at sandia.gov).
:line
lmp2vmd tool :h4,link(vmd)
The lmp2vmd sub-directory contains a README.txt file that describes
details of scripts and plugin support within the "VMD
package"_http://www.ks.uiuc.edu/Research/vmd for visualizing LAMMPS
dump files.
The VMD plugins and other supporting scripts were written by Axel
Kohlmeyer (akohlmey at cmm.chem.upenn.edu) at U Penn.
:line
matlab tool :h4,link(matlab)
The matlab sub-directory contains several "MATLAB"_matlabhome scripts for
@ -381,16 +370,14 @@ supports it. It has its own WWW page at
msi2lmp tool :h4,link(msi)
The msi2lmp sub-directory contains a tool for creating LAMMPS input
data files from Accelrys' Insight MD code (formerly MSI/Biosym and
its Discover MD code). See the README file for more information.
data files from BIOVIA's Materias Studio files (formerly Accelrys'
Insight MD code, formerly MSI/Biosym and its Discover MD code).
This tool was written by John Carpenter (Cray), Michael Peachey
(Cray), and Steve Lustig (Dupont). John is now at the Mayo Clinic
(jec at mayo.edu), but still fields questions about the tool.
(Cray), and Steve Lustig (Dupont). Several people contributed changes
to remove bugs and adapt its output to changes in LAMMPS.
This tool may be out-of-date with respect to the current LAMMPS and
Insight versions. Since we don't use it at Sandia, you'll need to
experiment with it yourself.
See the README file for more information.
:line
@ -409,7 +396,7 @@ University.
:line
polymer bonding tool :h4,link(polybond)
polybond tool :h4,link(polybond)
The polybond sub-directory contains a Python-based tool useful for
performing "programmable polymer bonding". The Python file
@ -468,48 +455,19 @@ These tools were written by Aidan Thompson at Sandia.
:line
restart2data tool :h4,link(restart)
smd tool :h4,link(smd)
NOTE: This tool is now obsolete and is not included in the current
LAMMPS distribution. This is becaues there is now a
"write_data"_write_data.html command, which can create a data file
from within an input script. Running LAMMPS with the "-r"
"command-line switch"_Section_start.html#start_7 as follows:
The smd sub-directory contains a C++ file dump2vtk_tris.cpp and
Makefile which can be compiled and used to convert triangle output
files created by the Smooth-Mach Dynamics (USER-SMD) package into a
VTK-compatible unstructured grid file. It could then be read in and
visualized by VTK.
lmp_g++ -r restartfile datafile
See the header of dump2vtk.cpp for more details.
is the same as running a 2-line input script:
read_restart restartfile
write_data datafile
which will produce the same data file that the restart2data tool used
to create. The following information is included in case you have an
older version of LAMMPS which still includes the restart2data tool.
The file restart2data.cpp converts a binary LAMMPS restart file into
an ASCII data file. The syntax for running the tool is
restart2data restart-file data-file (input-file) :pre
Input-file is optional and if specified will contain LAMMPS input
commands for the masses and force field parameters, instead of putting
those in the data-file. Only a few force field styles currently
support this option.
This tool must be compiled on a platform that can read the binary file
created by a LAMMPS run, since binary files are not compatible across
all platforms.
Note that a text data file has less precision than a binary restart
file. Hence, continuing a run from a converted data file will
typically not conform as closely to a previous run as will restarting
from a binary restart file.
If a "%" appears in the specified restart-file, the tool expects a set
of multiple files to exist. See the "restart"_restart.html and
"write_restart"_write_restart.html commands for info on how such sets
of files are written by LAMMPS, and how the files are named.
This tool was written by the USER-SMD package author, Georg
Ganzenmuller at the Fraunhofer-Institute for High-Speed Dynamics,
Ernst Mach Institute in Germany (georg.ganzenmueller at emi.fhg.de).
:line
@ -537,32 +495,3 @@ See the README file for details.
These files were provided by Vikas Varshney (vv0210 at gmail.com)
:line
xmovie tool :h4,link(xmovie)
The xmovie tool is an X-based visualization package that can read
LAMMPS dump files and animate them. It is in its own sub-directory
with the tools directory. You may need to modify its Makefile so that
it can find the appropriate X libraries to link against.
The syntax for running xmovie is
xmovie \[options\] dump.file1 dump.file2 ... :pre
If you just type "xmovie" you will see a list of options. Note that
by default, LAMMPS dump files are in scaled coordinates, so you
typically need to use the -scale option with xmovie. When xmovie runs
it opens a visualization window and a control window. The control
options are straightforward to use.
Xmovie was mostly written by Mike Uttormark (U Wisconsin) while he
spent a summer at Sandia. It displays 2d projections of a 3d domain.
While simple in design, it is an amazingly fast program that can
render large numbers of atoms very quickly. It's a useful tool for
debugging LAMMPS input and output and making sure your simulation is
doing what you think it should. The animations on the Examples page
of the "LAMMPS WWW site"_lws were created with xmovie.
I've lost contact with Mike, so I hope he's comfortable with us
distributing his great tool!

View File

@ -27,7 +27,7 @@
syntax</a></h2>
<p>fix_modify AtC consistent_fe_initialization &lt;on | off&gt;</p>
<ul>
<li>&lt;on|off&gt; = switch to activiate/deactiviate the intial setting of FE intrinsic field to match the projected MD field </li>
<li>&lt;on|off&gt; = switch to activiate/deactiviate the initial setting of FE intrinsic field to match the projected MD field </li>
</ul>
<h2><a class="anchor" id="examples">
examples</a></h2>

View File

@ -20,7 +20,7 @@ coprocessors via offloading neighbor list and non-bonded force
calculations to the Phi. The same C++ code is used in both cases.
When offloading to a coprocessor from a CPU, the same routine is run
twice, once on the CPU and once with an offload flag. This allows
LAMMPS to run on the CPU cores and coprocessor cores simulataneously.
LAMMPS to run on the CPU cores and coprocessor cores simultaneously.
[Currently Available USER-INTEL Styles:]
@ -29,7 +29,7 @@ Bond Styles: fene, harmonic :l
Dihedral Styles: charmm, harmonic, opls :l
Fixes: nve, npt, nvt, nvt/sllod :l
Improper Styles: cvff, harmonic :l
Pair Styles: buck/coul/cut, buck/coul/long, buck, gayberne,
Pair Styles: buck/coul/cut, buck/coul/long, buck, eam, gayberne,
charmm/coul/long, lj/cut, lj/cut/coul/long, sw, tersoff :l
K-Space Styles: pppm :l
:ule
@ -115,7 +115,7 @@ coprocessor and an Intel compiler are required. For this, the
recommended version of the Intel compiler is 14.0.1.106 or
versions 15.0.2.044 and higher.
Although any compiler can be used with the USER-INTEL pacakge,
Although any compiler can be used with the USER-INTEL package,
currently, vectorization directives are disabled by default when
not using Intel compilers due to lack of standard support and
observations of decreased performance. The OpenMP standard now
@ -428,7 +428,7 @@ to the card. This allows for overlap of MPI communication of forces
with computation on the coprocessor when the "newton"_newton.html
setting is "on". The default is dependent on the style being used,
however, better performance may be achieved by setting this option
explictly.
explicitly.
When using offload with CPU Hyper-Threading disabled, it may help
performance to use fewer MPI tasks and OpenMP threads than available
@ -464,7 +464,7 @@ supported.
[References:]
Brown, W.M., Carrillo, J.-M.Y., Mishra, B., Gavhane, N., Thakker, F.M., De Kraker, A.R., Yamada, M., Ang, J.A., Plimpton, S.J., Optimizing Classical Molecular Dynamics in LAMMPS, in Intel Xeon Phi Processor High Performance Programming: Knights Landing Edition, J. Jeffers, J. Reinders, A. Sodani, Eds. Morgan Kaufmann. :ulb,l
Brown, W.M., Carrillo, J.-M.Y., Mishra, B., Gavhane, N., Thakker, F.M., De Kraker, A.R., Yamada, M., Ang, J.A., Plimpton, S.J., "Optimizing Classical Molecular Dynamics in LAMMPS," in Intel Xeon Phi Processor High Performance Programming: Knights Landing Edition, J. Jeffers, J. Reinders, A. Sodani, Eds. Morgan Kaufmann. :ulb,l
Brown, W. M., Semin, A., Hebenstreit, M., Khvostov, S., Raman, K., Plimpton, S.J. Increasing Molecular Dynamics Simulation Rates with an 8-Fold Increase in Electrical Power Efficiency. 2016 International Conference for High Performance Computing. In press. :l

View File

@ -110,14 +110,14 @@ mpirun -np 96 -ppn 12 lmp_g++ -k on t 20 -sf kk -in in.lj # ditto on 8 Phis :p
[Required hardware/software:]
Kokkos support within LAMMPS must be built with a C++11 compatible
compiler. If using gcc, version 4.8.1 or later is required.
compiler. If using gcc, version 4.7.2 or later is required.
To build with Kokkos support for CPUs, 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
version 6.5 or later must be installed on your system. See the
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.
@ -217,7 +217,7 @@ 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
signicantly reduced performance compared to Kepler generation GPUs
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
@ -234,7 +234,7 @@ 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 compling for an
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
@ -272,7 +272,7 @@ 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 coproprocessor is designed to run,
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
@ -333,7 +333,7 @@ device=CUDA are the same.
You must still use the "-k on" "command-line
switch"_Section_start.html#start_7 to enable the KOKKOS package, and
specify its additional arguments for hardware options appopriate to
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

View File

@ -8,6 +8,7 @@
angle_style class2 command :h3
angle_style class2/omp command :h3
angle_style class2/kk command :h3
[Syntax:]

View File

@ -41,7 +41,7 @@ angle.
The torque on the dipole can be obtained by differentiating the
potential using the 'chain rule' as in appendix C.3 of
"(Allen)"_#Allen:
"(Allen)"_#Allen1:
:c,image(Eqs/angle_dipole_torque.jpg)
@ -121,6 +121,6 @@ This angle style should not be used with SHAKE.
[(Orsi)] Orsi & Essex, The ELBA force field for coarse-grain modeling of
lipid membranes, PloS ONE 6(12): e28637, 2011.
:link(Allen)
:link(Allen1)
[(Allen)] Allen & Tildesley, Computer Simulation of Liquids,
Clarendon Press, Oxford, 1987.

View File

@ -81,7 +81,7 @@ LAMMPS"_Section_start.html#start_3 section for more info on packages.
Unlike other angle styles, the hybrid angle style does not store angle
coefficient info for individual sub-styles in a "binary restart
files"_restart.html. Thus when retarting a simulation from a restart
files"_restart.html. Thus when restarting a simulation from a restart
file, you need to re-specify angle_coeff commands.
[Related commands:]

View File

@ -103,7 +103,7 @@ turns off the {first} option.
It is OK to use the {first} keyword with a group that has not yet been
defined, e.g. to use the atom_modify first command at the beginning of
your input script. LAMMPS does not use the group until a simullation
your input script. LAMMPS does not use the group until a simulation
is run.
The {sort} keyword turns on a spatial sorting or reordering of atoms
@ -116,7 +116,7 @@ various other factors. As a general rule, sorting is typically more
effective at speeding up simulations of liquids as opposed to solids.
In tests we have done, the speed-up can range from zero to 3-4x.
Reordering is peformed every {Nfreq} timesteps during a dynamics run
Reordering is performed every {Nfreq} timesteps during a dynamics run
or iterations during a minimization. More precisely, reordering
occurs at the first reneighboring that occurs after the target
timestep. The reordering is performed locally by each processor,
@ -130,7 +130,7 @@ the processor's 1d list of atoms.
The goal of this procedure is for atoms to put atoms close to each
other in the processor's one-dimensional list of atoms that are also
near to each other spatially. This can improve cache performance when
pairwise intereractions and neighbor lists are computed. Note that if
pairwise interactions and neighbor lists are computed. Note that if
bins are too small, there will be few atoms/bin. Likewise if bins are
too large, there will be many atoms/bin. In both cases, the goal of
cache locality will be undermined.
@ -138,7 +138,7 @@ cache locality will be undermined.
NOTE: Running a simulation with sorting on versus off should not
change the simulation results in a statistical sense. However, a
different ordering will induce round-off differences, which will lead
to diverging trajectories over time when comparing two simluations.
to diverging trajectories over time when comparing two simulations.
Various commands, particularly those which use random numbers
(e.g. "velocity create"_velocity.html, and "fix
langevin"_fix_langevin.html), may generate (statistically identical)

View File

@ -110,12 +110,17 @@ basis.
For the {sphere} style, the particles are spheres and each stores a
per-particle diameter and mass. If the diameter > 0.0, the particle
is a finite-size sphere. If the diameter = 0.0, it is a point
particle.
particle. Note that by use of the {disc} keyword with the "fix
nve/sphere"_fix_nve_sphere.html, "fix nvt/sphere"_fix_nvt_sphere.html,
"fix nph/sphere"_fix_nph_sphere.html, "fix
npt/sphere"_fix_npt_sphere.html commands, spheres can be effectively
treated as 2d discs for a 2d simulation if desired. See also the "set
density/disc"_set.html command.
For the {ellipsoid} style, the particles are ellipsoids and each
stores a flag which indicates whether it is a finite-size ellipsoid or
a point particle. If it is an ellipsoid, it also stores a shape
vector with the 3 diamters of the ellipsoid and a quaternion 4-vector
vector with the 3 diameters of the ellipsoid and a quaternion 4-vector
with its orientation.
For the {dipole} style, a point dipole is defined for each point
@ -149,7 +154,7 @@ Hydrodynamics. Both fluids and solids can be modeled. Particles
store the mass and volume of an integration point, a kernel diameter
used for calculating the field variables (e.g. stress and deformation)
and a contact radius for calculating repulsive forces which prevent
individual physical bodies from penetretating each other.
individual physical bodies from penetrating each other.
The {wavepacket} style is similar to {electron}, but the electrons may
consist of several Gaussian wave packets, summed up with coefficients
@ -165,7 +170,7 @@ For the {tri} style, the particles are planar triangles and each
stores a per-particle mass and size and orientation (i.e. the corner
points of the triangle).
The {template} style allows molecular topolgy (bonds,angles,etc) to be
The {template} style allows molecular topology (bonds,angles,etc) to be
defined via a molecule template using the "molecule"_molecule.html
command. The template stores one or more molecules with a single copy
of the topology info (bonds,angles,etc) of each. Individual atoms
@ -195,7 +200,7 @@ the {bstyle} argument. Body particles can represent complex entities,
such as surface meshes of discrete points, collections of
sub-particles, deformable objects, etc.
The "body"_body.html doc page descibes the body styles LAMMPS
The "body"_body.html doc page describes the body styles LAMMPS
currently supports, and provides more details as to the kind of body
particles they represent. For all styles, each body particle stores
moments of inertia and a quaternion 4-vector, so that its orientation
@ -280,7 +285,7 @@ The {dpd} style is part of the USER-DPD package for dissipative
particle dynamics (DPD).
The {meso} style is part of the USER-SPH package for smoothed particle
hydrodyanmics (SPH). See "this PDF
hydrodynamics (SPH). See "this PDF
guide"_USER/sph/SPH_LAMMPS_userguide.pdf to using SPH in LAMMPS.
The {wavepacket} style is part of the USER-AWPMD package for the

View File

@ -12,7 +12,7 @@ balance command :h3
balance thresh style args ... keyword args ... :pre
thresh = imbalance threshhold that must be exceeded to perform a re-balance :ulb,l
thresh = imbalance threshold that must be exceeded to perform a re-balance :ulb,l
one style/arg pair can be used (or multiple for {x},{y},{z}) :l
style = {x} or {y} or {z} or {shift} or {rcb} :l
{x} args = {uniform} or Px-1 numbers between 0 and 1
@ -30,7 +30,7 @@ style = {x} or {y} or {z} or {shift} or {rcb} :l
{shift} args = dimstr Niter stopthresh
dimstr = sequence of letters containing "x" or "y" or "z", each not more than once
Niter = # of times to iterate within each dimension of dimstr sequence
stopthresh = stop balancing when this imbalance threshhold is reached
stopthresh = stop balancing when this imbalance threshold is reached
{rcb} args = none :pre
zero or more keyword/arg pairs may be appended :l
keyword = {weight} or {out} :l
@ -76,13 +76,13 @@ sub-domain sizes and shapes on-the-fly during a "run"_run.html.
Load-balancing is typically most useful if the particles in the
simulation box have a spatially-varying density distribution or when
the computational cost varies signficantly between different
the computational cost varies significantly between different
particles. E.g. a model of a vapor/liquid interface, or a solid with
an irregular-shaped geometry containing void regions, or "hybrid pair
style simulations"_pair_hybrid.html which combine pair styles with
different computational cost. In these cases, the LAMMPS default of
dividing the simulation box volume into a regular-spaced grid of 3d
bricks, with one equal-volume sub-domain per procesor, may assign
bricks, with one equal-volume sub-domain per processor, may assign
numbers of particles per processor in a way that the computational
effort varies significantly. This can lead to poor performance when
the simulation is run in parallel.
@ -91,7 +91,7 @@ The balancing can be performed with or without per-particle weighting.
With no weighting, the balancing attempts to assign an equal number of
particles to each processor. With weighting, the balancing attempts
to assign an equal aggregate computational weight to each processor,
which typically inducces a diffrent number of atoms assigned to each
which typically induces a different number of atoms assigned to each
processor. Details on the various weighting options and examples for
how they can be used are "given below"_#weighted_balance.
@ -222,7 +222,7 @@ listed in ascending order. They represent the fractional position of
the cutting place. The left (or lower) edge of the box is 0.0, and
the right (or upper) edge is 1.0. Neither of these values is
specified. Only the interior Ps-1 positions are specified. Thus is
there are 2 procesors in the x dimension, you specify a single value
there are 2 processors in the x dimension, you specify a single value
such as 0.75, which would make the left processor's sub-domain 3x
larger than the right processor's sub-domain.
@ -266,7 +266,7 @@ assigned, particles are migrated to their new owning processor, and
the balance procedure ends.
NOTE: At each rebalance operation, the bisectioning for each cutting
plane (line in 2d) typcially starts with low and high bounds separated
plane (line in 2d) typically starts with low and high bounds separated
by the extent of a processor's sub-domain in one dimension. The size
of this bracketing region shrinks by 1/2 every iteration. Thus if
{Niter} is specified as 10, the cutting plane will typically be
@ -286,24 +286,32 @@ above. It performs a recursive coordinate bisectioning (RCB) of the
simulation domain. The basic idea is as follows.
The simulation domain is cut into 2 boxes by an axis-aligned cut in
the longest dimension, leaving one new box on either side of the cut.
All the processors are also partitioned into 2 groups, half assigned
to the box on the lower side of the cut, and half to the box on the
upper side. (If the processor count is odd, one side gets an extra
processor.) The cut is positioned so that the number of particles in
the lower box is exactly the number that the processors assigned to
that box should own for load balance to be perfect. This also makes
load balance for the upper box perfect. The positioning is done
iteratively, by a bisectioning method. Note that counting particles
on either side of the cut requires communication between all
processors at each iteration.
one of the dimensions, leaving one new sub-box on either side of the
cut. Which dimension is chosen for the cut depends on the particle
(weight) distribution within the parent box. Normally the longest
dimension of the box is cut, but if all (or most) of the particles are
at one end of the box, a cut may be performed in another dimension to
induce sub-boxes that are more cube-ish (3d) or square-ish (2d) in
shape.
After the cut is made, all the processors are also partitioned into 2
groups, half assigned to the box on the lower side of the cut, and
half to the box on the upper side. (If the processor count is odd,
one side gets an extra processor.) The cut is positioned so that the
number of (weighted) particles in the lower box is exactly the number
that the processors assigned to that box should own for load balance
to be perfect. This also makes load balance for the upper box
perfect. The positioning of the cut is done iteratively, by a
bisectioning method (median search). Note that counting particles on
either side of the cut requires communication between all processors
at each iteration.
That is the procedure for the first cut. Subsequent cuts are made
recursively, in exactly the same manner. The subset of processors
assigned to each box make a new cut in the longest dimension of that
box, splitting the box, the subset of processsors, and the particles
in the box in two. The recursion continues until every processor is
assigned a sub-box of the entire simulation domain, and owns the
assigned to each box make a new cut in one dimension of that box,
splitting the box, the subset of processors, and the particles in the
box in two. The recursion continues until every processor is assigned
a sub-box of the entire simulation domain, and owns the (weighted)
particles in that sub-box.
:line
@ -368,7 +376,7 @@ of about 0.8 often results in the best performance, since the number
of neighbors is likely to overestimate the ideal weight.
This weight style is useful for systems where there are different
cutoffs used for different pairs of interations, or the density
cutoffs used for different pairs of interactions, or the density
fluctuates, or a large number of particles are in the vicinity of a
wall, or a combination of these effects. If a simulation uses
multiple neighbor lists, this weight style will use the first suitable
@ -402,7 +410,7 @@ decrease the weights so that the ratio of max weight to min weight
decreases by {factor}. In both cases the intermediate weight values
increase/decrease proportionally as well. A value = 1.0 has no effect
on the {time} weights. As a rule of thumb, effective values to use
are typicall between 0.5 and 1.2. Note that the timer quantities
are typically between 0.5 and 1.2. Note that the timer quantities
mentioned above can be affected by communication which occurs in the
middle of the operations, e.g. pair styles with intermediate exchange
of data witin the force computation, and likewise for KSpace solves.

View File

@ -82,7 +82,7 @@ internal stress that induces fragmentation :ul
then the interaction between pairs of particles is likely to be more
complex than the summation of simple sub-particle interactions. An
example is contact or frictional forces between particles with planar
sufaces that inter-penetrate.
surfaces that inter-penetrate.
These are additional LAMMPS commands that can be used with body
particles of different styles
@ -105,7 +105,7 @@ in the sections below.
The {nparticle} body style represents body particles as a rigid body
with a variable number N of sub-particles. It is provided as a
vanillia, prototypical example of a body particle, although as
vanilla, prototypical example of a body particle, although as
mentioned above, the "fix rigid"_fix_rigid.html command already
duplicates its functionality.
@ -140,7 +140,7 @@ for more details.
The 6 moments of inertia (ixx,iyy,izz,ixy,ixz,iyz) should be the
values consistent with the current orientation of the rigid body
around its center of mass. The values are with respect to the
simulation box XYZ axes, not with respect to the prinicpal axes of the
simulation box XYZ axes, not with respect to the principal axes of the
rigid body itself. LAMMPS performs the latter calculation internally.
The coordinates of each sub-particle are specified as its x,y,z
displacement from the center-of-mass of the body particle. The
@ -218,7 +218,7 @@ wish; see the "read_data"_read_data.html command for more details.
The 6 moments of inertia (ixx,iyy,izz,ixy,ixz,iyz) should be the
values consistent with the current orientation of the rigid body
around its center of mass. The values are with respect to the
simulation box XYZ axes, not with respect to the prinicpal axes of the
simulation box XYZ axes, not with respect to the principal axes of the
rigid body itself. LAMMPS performs the latter calculation internally.
The coordinates of each vertex are specified as its x,y,z displacement
from the center-of-mass of the body particle. The center-of-mass

View File

@ -8,6 +8,7 @@
bond_style class2 command :h3
bond_style class2/omp command :h3
bond_style class2/kk command :h3
[Syntax:]

View File

@ -64,7 +64,7 @@ LAMMPS"_Section_start.html#start_3 section for more info on packages.
Unlike other bond styles, the hybrid bond style does not store bond
coefficient info for individual sub-styles in a "binary restart
files"_restart.html. Thus when retarting a simulation from a restart
files"_restart.html. Thus when restarting a simulation from a restart
file, you need to re-specify bond_coeff commands.
[Related commands:]

81
doc/src/bond_oxdna.txt Normal file
View File

@ -0,0 +1,81 @@
"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 oxdna/fene command :h3
bond_style oxdna2/fene command :h3
[Syntax:]
bond_style oxdna/fene :pre
bond_style oxdna2/fene :pre
[Examples:]
bond_style oxdna/fene
bond_coeff * 2.0 0.25 0.7525 :pre
bond_style oxdna2/fene
bond_coeff * 2.0 0.25 0.7564 :pre
[Description:]
The {oxdna/fene} and {oxdna2/fene} bond styles use the potential
:c,image(Eqs/bond_oxdna_fene.jpg)
to define a modified finite extensible nonlinear elastic (FENE) potential
"(Ouldridge)"_#oxdna_fene to model the connectivity of the phosphate backbone
in the oxDNA force field for coarse-grained modelling of DNA.
The following coefficients must be defined for the bond type via the
"bond_coeff"_bond_coeff.html command as given in the above example, or in
the data file or restart files read by the "read_data"_read_data.html
or "read_restart"_read_restart.html commands:
epsilon (energy)
Delta (distance)
r0 (distance) :ul
NOTE: The oxDNA bond style has to be used together with the corresponding oxDNA pair styles
for excluded volume interaction {oxdna/excv}, stacking {oxdna/stk}, cross-stacking {oxdna/xstk}
and coaxial stacking interaction {oxdna/coaxstk} as well as hydrogen-bonding interaction {oxdna/hbond} (see also documentation of
"pair_style oxdna/excv"_pair_oxdna.html). For the oxDNA2 "(Snodin)"_#oxdna2 bond style the analogous pair styles and an additional Debye-Hueckel pair
style {oxdna2/dh} have to be defined.
The coefficients
in the above example have to be kept fixed and cannot be changed without reparametrizing the entire model.
Example input and data files for DNA duplexes can be found in examples/USER/cgdna/examples/oxDNA/ and /oxDNA2/.
A simple python setup tool which creates single straight or helical DNA strands,
DNA duplexes or arrays of DNA duplexes can be found in examples/USER/cgdna/util/.
A technical report with more information on the model, the structure of the input file,
the setup tool and the performance of the LAMMPS-implementation of oxDNA
can be found "here"_PDF/USER-CGDNA-overview.pdf.
:line
[Restrictions:]
This bond style can only be used if LAMMPS was built with the
USER-CGDNA package and the MOLECULE and ASPHERE package. See the "Making
LAMMPS"_Section_start.html#start_3 section for more info on packages.
[Related commands:]
"pair_style oxdna/excv"_pair_oxdna.html, "pair_style oxdna2/excv"_pair_oxdna2.html, "fix nve/dotc/langevin"_fix_nve_dotc_langevin.html, "bond_coeff"_bond_coeff.html
[Default:] none
:line
:link(oxdna_fene)
[(Ouldridge)] T.E. Ouldridge, A.A. Louis, J.P.K. Doye, J. Chem. Phys. 134, 085101 (2011).
:link(oxdna2)
[(Snodin)] B.E. Snodin, F. Randisi, M. Mosayebi, et al., J. Chem. Phys. 142, 234901 (2015).

View File

@ -15,6 +15,8 @@ Bond Styles :h1
bond_morse
bond_none
bond_nonlinear
bond_oxdna
bond_oxdna2
bond_quartic
bond_table
bond_zero

View File

@ -101,11 +101,11 @@ Instead you could do something like this, assuming the simulation box
is non-periodic and atoms extend from 0 to 20 in all dimensions:
change_box all x final -10 20
create_atoms 1 single -5 5 5 # this will fail to insert an atom :pre
create_atoms 1 single -5 5 5 # this will fail to insert an atom :pre
change_box all x final -10 20 boundary f s s
create_atoms 1 single -5 5 5
change_box boundary s s s # this will work :pre
change_box all boundary s s s # this will work :pre
NOTE: Unlike the earlier "displace_box" version of this command, atom
remapping is NOT performed by default. This command allows remapping
@ -258,8 +258,8 @@ command.
:line
The {ortho} and {triclinic} keywords convert the simulation box to be
orthogonal or triclinic (non-orthongonal). See "this
section"_Section_howto#howto_13 for a discussion of how non-orthongal
orthogonal or triclinic (non-orthogonal). See "this
section"_Section_howto#howto_13 for a discussion of how non-orthogonal
boxes are represented in LAMMPS.
The simulation box is defined as either orthogonal or triclinic when
@ -289,7 +289,7 @@ the create_box command is encountered in the input script.
The {remap} keyword remaps atom coordinates from the last saved box
size/shape to the current box state. For example, if you stretch the
box in the x dimension or tilt it in the xy plane via the {x} and {xy}
keywords, then the {remap} commmand will dilate or tilt the atoms to
keywords, then the {remap} command will dilate or tilt the atoms to
conform to the new box size/shape, as if the atoms moved with the box
as it deformed.

View File

@ -39,7 +39,7 @@ sizes and shapes. Again there is one tile per processor. To acquire
information for nearby atoms, communication must now be done with a
more complex pattern of neighboring processors.
Note that this command does not actually define a partitoining of the
Note that this command does not actually define a partitioning of the
simulation box (a domain decomposition), rather it determines what
kinds of decompositions are allowed and the pattern of communication
used to enable the decomposition. A decomposition is created when the

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@ -91,6 +91,7 @@ Commands :h1
suffix
tad
temper
temper_grem
thermo
thermo_modify
thermo_style

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@ -235,7 +235,7 @@ section of "this page"_Section_commands.html#cmd_5.
"temp/ramp"_compute_temp_ramp.html - temperature excluding ramped velocity component
"temp/region"_compute_temp_region.html - temperature of a region of atoms
"temp/sphere"_compute_temp_sphere.html - temperature of spherical particles
"ti"_compute_ti.html - thermodyanmic integration free energy values
"ti"_compute_ti.html - thermodynamic integration free energy values
"torque/chunk"_compute_torque_chunk.html - torque applied on each chunk
"vacf"_compute_vacf.html - velocity-autocorrelation function of group of atoms
"vcm/chunk"_compute_vcm_chunk.html - velocity of center-of-mass for each chunk

View File

@ -22,7 +22,7 @@ compute 1 fluid angmom/chunk molchunk :pre
[Description:]
Define a computation that calculates the angular momemtum of multiple
Define a computation that calculates the angular momentum of multiple
chunks of atoms.
In LAMMPS, chunks are collections of atoms defined by a "compute

View File

@ -18,8 +18,8 @@ lattice = {fcc} or {bcc} or N = # of neighbors per atom to include :l
zero or more keyword/value pairs may be appended :l
keyword = {axes} :l
{axes} value = {no} or {yes}
{no} = do not calulate 3 symmetry axes
{yes} = calulate 3 symmetry axes :pre
{no} = do not calculate 3 symmetry axes
{yes} = calculate 3 symmetry axes :pre
:ule
[Examples:]
@ -108,7 +108,7 @@ symmetry axis, followed by the second, and third symmetry axes in
columns 5-7 and 8-10.
The centrosymmetry values are unitless values >= 0.0. Their magnitude
depends on the lattice style due to the number of contibuting neighbor
depends on the lattice style due to the number of contributing neighbor
pairs in the summation in the formula above. And it depends on the
local defects surrounding the central atom, as described above. For
the {axes yes} case, the vector components are also unitless, since

View File

@ -148,7 +148,9 @@ described further below where the keywords are discussed.
The {binning} styles perform a spatial binning of atoms, and assign an
atom the chunk ID corresponding to the bin number it is in. {Nchunk}
is set to the number of bins, which can change if the simulation box
size changes.
size changes. This also depends on the setting of the {units}
keyword; e.g. for {reduced} units the number of chunks may not change
even if the box size does.
The {bin/1d}, {bin/2d}, and {bin/3d} styles define bins as 1d layers
(slabs), 2d pencils, or 3d boxes. The {dim}, {origin}, and {delta}
@ -386,7 +388,7 @@ If {compress yes} is set, and the {compress} keyword comes before the
{limit} keyword, the compression operation is performed first, as
described below, which resets {Nchunk}. The {limit} keyword is then
applied to the new {Nchunk} value, exactly as described in the
preceeding paragraph. Note that in this case, all atoms will end up
preceding paragraph. Note that in this case, all atoms will end up
with chunk IDs <= {Nc}, but their original values (e.g. molecule ID or
compute/fix/variable value) may have been > {Nc}, because of the
compression operation.
@ -459,7 +461,7 @@ The original chunk IDs (before renumbering) can be accessed by the
which outputs the original IDs as one of the columns in its global
output array. For example, using the "compute cluster/atom" command
discussed above, the original 5 unique chunk IDs might be atom IDs
(27,4982,58374,857838,1000000). After compresion, these will be
(27,4982,58374,857838,1000000). After compression, these will be
renumbered to (1,2,3,4,5). The original values (27,...,1000000) can
be output to a file by the "fix ave/chunk"_fix_ave_chunk.html command,
or by using the "fix ave/time"_fix_ave_time.html command in
@ -538,7 +540,7 @@ is set to {yes}, an out-of-domain atom will have its chunk ID set to
to the first or last bin in both the radial and axis dimensions. If
{discard} is set to {mixed}, which is the default, the radial
dimension is treated the same as for {discard} = no. But for the axis
dimensinon, it will only have its chunk ID set to the first or last
dimension, it will only have its chunk ID set to the first or last
bin if bins extend to the simulation box boundary in the axis
dimension. This is the case if the {bound} keyword settings are
{lower} and {upper}, which is the default. If the {bound} keyword

View File

@ -42,7 +42,7 @@ performed on mono-component systems.
The CNA calculation can be sensitive to the specified cutoff value.
You should insure the appropriate nearest neighbors of an atom are
found within the cutoff distance for the presumed crystal strucure.
found within the cutoff distance for the presumed crystal structure.
E.g. 12 nearest neighbor for perfect FCC and HCP crystals, 14 nearest
neighbors for perfect BCC crystals. These formulas can be used to
obtain a good cutoff distance:

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@ -25,7 +25,7 @@ Define a computation that calculates the center-of-mass of the group
of atoms, including all effects due to atoms passing thru periodic
boundaries.
A vector of three quantites is calculated by this compute, which
A vector of three quantities is calculated by this compute, which
are the x,y,z coordinates of the center of mass.
NOTE: The coordinates of an atom contribute to the center-of-mass in

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@ -10,34 +10,43 @@ compute coord/atom command :h3
[Syntax:]
compute ID group-ID coord/atom cutoff type1 type2 ... :pre
compute ID group-ID coord/atom cstyle args ... :pre
ID, group-ID are documented in "compute"_compute.html command
coord/atom = style name of this compute command
cutoff = distance within which to count coordination neighbors (distance units)
typeN = atom type for Nth coordination count (see asterisk form below) :ul
ID, group-ID are documented in "compute"_compute.html command :ulb,l
coord/atom = style name of this compute command :l
cstyle = {cutoff} or {orientorder} :l
{cutoff} args = cutoff typeN
cutoff = distance within which to count coordination neighbors (distance units)
typeN = atom type for Nth coordination count (see asterisk form below)
{orientorder} args = orientorderID threshold
orientorderID = ID of an orientorder/atom compute
threshold = minimum value of the product of two "connected" atoms :pre
:ule
[Examples:]
compute 1 all coord/atom 2.0
compute 1 all coord/atom 6.0 1 2
compute 1 all coord/atom 6.0 2*4 5*8 * :pre
compute 1 all coord/atom cutoff 2.0
compute 1 all coord/atom cutoff 6.0 1 2
compute 1 all coord/atom cutoff 6.0 2*4 5*8 *
compute 1 all coord/atom orientorder 2 0.5 :pre
[Description:]
Define a computation that calculates one or more coordination numbers
for each atom in a group.
This compute performs calculations between neighboring atoms to
determine a coordination value. The specific calculation and the
meaning of the resulting value depend on the {cstyle} keyword used.
A coordination number is defined as the number of neighbor atoms with
specified atom type(s) that are within the specified cutoff distance
from the central atom. Atoms not in the group are included in a
coordination number of atoms in the group.
The {cutoff} cstyle calculates one or more traditional coordination
numbers for each atom. A coordination number is defined as the number
of neighbor atoms with specified atom type(s) that are within the
specified cutoff distance from the central atom. Atoms not in the
specified group are included in the coordination number tally.
The {typeN} keywords allow you to specify which atom types contribute
to each coordination number. One coordination number is computed for
each of the {typeN} keywords listed. If no {typeN} keywords are
listed, a single coordination number is calculated, which includes
atoms of all types (same as the "*" format, see below).
The {typeN} keywords allow specification of which atom types
contribute to each coordination number. One coordination number is
computed for each of the {typeN} keywords listed. If no {typeN}
keywords are listed, a single coordination number is calculated, which
includes atoms of all types (same as the "*" format, see below).
The {typeN} keywords can be specified in one of two ways. An explicit
numeric value can be used, as in the 2nd example above. Or a
@ -49,8 +58,27 @@ from 1 to N. A leading asterisk means all types from 1 to n
(inclusive). A middle asterisk means all types from m to n
(inclusive).
The value of all coordination numbers will be 0.0 for atoms not in the
specified compute group.
The {orientorder} cstyle calculates the number of "connected" neighbor
atoms J around each central atom I. For this {cstyle}, connected is
defined by the orientational order parameter calculated by the
"compute orientorder/atom"_compute_orientorder_atom.html command.
This {cstyle} thus allows one to apply the ten Wolde's criterion to
identify crystal-like atoms in a system, as discussed in "ten
Wolde"_#tenWolde1.
The ID of the previously specified "compute
orientorder/atom"_compute_orientorder/atom command is specified as
{orientorderID}. The compute must invoke its {components} option to
calculate components of the {Ybar_lm} vector for each atoms, as
described in its documentation. Note that orientorder/atom compute
defines its own criteria for identifying neighboring atoms. If the
scalar product ({Ybar_lm(i)},{Ybar_lm(j)}), calculated by the
orientorder/atom compute is larger than the specified {threshold},
then I and J are connected, and the coordination value of I is
incremented by one.
For all {cstyle} settings, all coordination values will be 0.0 for
atoms not in the specified compute group.
The neighbor list needed to compute this quantity is constructed each
time the calculation is performed (i.e. each time a snapshot of atoms
@ -72,11 +100,16 @@ the neighbor list.
[Output info:]
If single {type1} keyword is specified (or if none are specified),
this compute calculates a per-atom vector. If multiple {typeN}
keywords are specified, this compute calculates a per-atom array, with
N columns. These values can be accessed by any command that uses
per-atom values from a compute as input. See "Section
For {cstyle} cutoff, this compute can calculate a per-atom vector or
array. If single {type1} keyword is specified (or if none are
specified), this compute calculates a per-atom vector. If multiple
{typeN} keywords are specified, this compute calculates a per-atom
array, with N columns.
For {cstyle} orientorder, this compute calculates a per-atom vector.
These values can be accessed by any command that uses per-atom values
from a compute as input. See "Section
6.15"_Section_howto.html#howto_15 for an overview of LAMMPS output
options.
@ -88,5 +121,12 @@ explained above.
[Related commands:]
"compute cluster/atom"_compute_cluster_atom.html
"compute orientorder/atom"_compute_orientorder_atom.html
[Default:] none
:line
:link(tenWolde1)
[(tenWolde)] P. R. ten Wolde, M. J. Ruiz-Montero, D. Frenkel,
J. Chem. Phys. 104, 9932 (1996).

View File

@ -47,7 +47,7 @@ any command that uses per-atom values from a compute as input. See
"Section 6.15"_Section_howto.html#howto_15 for an overview of
LAMMPS output options.
The per-atom vector values are unitlesss numbers (damage) >= 0.0.
The per-atom vector values are unitless numbers (damage) >= 0.0.
[Restrictions:]

View File

@ -50,7 +50,7 @@ This compute calculates a per-atom vector, which can be accessed by
any command that uses per-atom values from a compute as input. See
Section_howto 15 for an overview of LAMMPS output options.
The per-atom vector values are unitlesss numbers (theta) >= 0.0.
The per-atom vector values are unitless numbers (theta) >= 0.0.
[Restrictions:]

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@ -25,7 +25,7 @@ Define a computation that calculates the current displacement of each
atom in the group from its original coordinates, including all effects
due to atoms passing thru periodic boundaries.
A vector of four quantites per atom is calculated by this compute.
A vector of four quantities per atom is calculated by this compute.
The first 3 elements of the vector are the dx,dy,dz displacements.
The 4th component is the total displacement, i.e. sqrt(dx*dx + dy*dy +
dz*dz).

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@ -64,7 +64,7 @@ command.
:line
:link(Larentzos)
:link(Larentzos1)
[(Larentzos)] J.P. Larentzos, J.K. Brennan, J.D. Moore, and
W.D. Mattson, "LAMMPS Implementation of Constant Energy Dissipative
Particle Dynamics (DPD-E)", ARL-TR-6863, U.S. Army Research

View File

@ -59,7 +59,7 @@ command.
:line
:link(Larentzos)
:link(Larentzos2)
[(Larentzos)] J.P. Larentzos, J.K. Brennan, J.D. Moore, and
W.D. Mattson, "LAMMPS Implementation of Constant Energy Dissipative
Particle Dynamics (DPD-E)", ARL-TR-6863, U.S. Army Research

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@ -14,7 +14,7 @@ compute ID group-ID event/displace threshold :pre
ID, group-ID are documented in "compute"_compute.html command
event/displace = style name of this compute command
threshold = minimum distance anyparticle must move to trigger an event (distance units) :ul
threshold = minimum distance any particle must move to trigger an event (distance units) :ul
[Examples:]
@ -37,7 +37,7 @@ further than the threshold distance.
NOTE: If the system is undergoing significant center-of-mass motion,
due to thermal motion, an external force, or an initial net momentum,
then this compute will not be able to distinguish that motion from
local atom displacements and may generate "false postives."
local atom displacements and may generate "false positives."
[Output info:]

View File

@ -55,7 +55,7 @@ M is the actual length of the input vector, then an output value of
0.0 is assigned to the atom.
An example of how this command is useful, is in the context of
"chunks" which are static or dyanmic subsets of atoms. The "compute
"chunks" which are static or dynamic subsets of atoms. The "compute
chunk/atom"_compute_chunk_atom.html command assigns unique chunk IDs
to each atom. It's output can be used as the {index} parameter for
this command. Various other computes with "chunk" in their style
@ -192,7 +192,7 @@ reference thermodynamic keywords and various other attributes of
atoms, or invoke other computes, fixes, or variables when they are
evaluated, so this is a very general means of generating a vector of
global quantities which the {index} parameter will reference for
assignement of global values to atoms.
assignment of global values to atoms.
:line
@ -207,7 +207,7 @@ See "Section 6.15"_Section_howto.html#howto_15 for an overview of
LAMMPS output options.
The per-atom vector or array values will be in whatever units the
corresponsing input values are in.
corresponding input values are in.
[Restrictions:] none

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@ -16,10 +16,11 @@ ID, group-ID are documented in "compute"_compute.html command :ulb,l
group/group = style name of this compute command :l
group2-ID = group ID of second (or same) group :l
zero or more keyword/value pairs may be appended :l
keyword = {pair} or {kspace} or {boundary} :l
keyword = {pair} or {kspace} or {boundary} or {molecule} :l
{pair} value = {yes} or {no}
{kspace} value = {yes} or {no}
{boundary} value = {yes} or {no} :pre
{boundary} value = {yes} or {no}
{molecule} value = {off} or {inter} or {intra} :pre
:ule
[Examples:]
@ -46,6 +47,13 @@ NOTE: The energies computed by the {pair} keyword do not include tail
corrections, even if they are enabled via the
"pair_modify"_pair_modify.html command.
If the {molecule} keyword is set to {inter} or {intra} than an
additional check is made based on the molecule IDs of the two atoms in
each pair before including their pairwise interaction energy and
force. For the {inter} setting, the two atoms must be in different
molecules. For the {intra} setting, the two atoms must be in the same
molecule.
If the {kspace} keyword is set to {yes}, which is not the default, and
if a "kspace_style"_kspace_style.html is defined, then the interaction
energy will include a Kspace component which is the long-range
@ -66,6 +74,10 @@ affect the force calculation and will be zero if one or both of the
groups are charge neutral. This energy correction term is the same as
that included in the regular Ewald and PPPM routines.
NOTE: The {molecule} setting only affects the group/group
contributions calculated by the {pair} keyword. It does not affect
the group/group contributions calculated by the {kspace} keyword.
This compute does not calculate any bond or angle or dihedral or
improper interactions between atoms in the two groups.
@ -78,6 +90,22 @@ work (FFTs, Ewald summation) as computing long-range forces for the
entire system. Thus it can be costly to invoke this compute too
frequently.
NOTE: If you have a bonded system, then the settings of
"special_bonds"_special_bonds.html command can remove pairwise
interactions between atoms in the same bond, angle, or dihedral. This
is the default setting for the "special_bonds"_special_bonds.html
command, and means those pairwise interactions do not appear in the
neighbor list. Because this compute uses a neighbor list, it also
means those pairs will not be included in the group/group interaction.
This does not apply when using long-range coulomb interactions
({coul/long}, {coul/msm}, {coul/wolf} or similar. One way to get
around this would be to set special_bond scaling factors to very tiny
numbers that are not exactly zero (e.g. 1.0e-50). Another workaround
is to write a dump file, and use the "rerun"_rerun.html command to
compute the group/group interactions for snapshots in the dump file.
The rerun script can use a "special_bonds"_special_bonds.html command
that includes all pairs in the neighbor list.
If you desire a breakdown of the interactions into a pairwise and
Kspace component, simply invoke the compute twice with the appropriate
yes/no settings for the {pair} and {kspace} keywords. This is no more
@ -119,7 +147,8 @@ The {ewald} and {pppm} styles do.
[Default:]
The option defaults are pair = yes, kspace = no, and boundary = yes.
The option defaults are pair = yes, kspace = no, boundary = yes,
molecule = off.
:line

View File

@ -38,7 +38,7 @@ subtracted to a group of atoms.
The compute takes three arguments which are IDs of other
"computes"_compute.html. One calculates per-atom kinetic energy
({ke-ID}), one calculates per-atom potential energy ({pe-ID)}, and the
third calcualtes per-atom stress ({stress-ID}).
third calculates per-atom stress ({stress-ID}).
NOTE: These other computes should provide values for all the atoms in
the group this compute specifies. That means the other computes could
@ -83,7 +83,7 @@ The heat flux can be output every so many timesteps (e.g. via the
post-processing operation, an autocorrelation can be performed, its
integral estimated, and the Green-Kubo formula above evaluated.
The "fix ave/correlate"_fix_ave_correlate.html command can calclate
The "fix ave/correlate"_fix_ave_correlate.html command can calculate
the autocorrelation. The trap() function in the
"variable"_variable.html command can calculate the integral.

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@ -35,7 +35,7 @@ chunk/atom"_compute_chunk_atom.html doc page and "Section
defined and examples of how they can be used to measure properties of
a system.
This compute calculates the 6 components of the symmetric intertia
This compute calculates the 6 components of the symmetric inertia
tensor for each chunk, ordered Ixx,Iyy,Izz,Ixy,Iyz,Ixz. The
calculation includes all effects due to atoms passing thru periodic
boundaries.

View File

@ -14,27 +14,29 @@ compute_modify compute-ID keyword value ... :pre
compute-ID = ID of the compute to modify :ulb,l
one or more keyword/value pairs may be listed :l
keyword = {extra} or {dynamic} :l
{extra} value = N
keyword = {extra/dof} or {extra} or {dynamic/dof} or {dynamic} :l
{extra/dof} value = N
N = # of extra degrees of freedom to subtract
{dynamic} value = {yes} or {no}
yes/no = do or do not recompute the number of atoms contributing to the temperature :pre
{extra} syntax is identical to {extra/dof}, will be disabled at some point
{dynamic/dof} value = {yes} or {no}
yes/no = do or do not recompute the number of degrees of freedom (DOF) contributing to the temperature
{dynamic} syntax is identical to {dynamic/dof}, will be disabled at some point :pre
:ule
[Examples:]
compute_modify myTemp extra 0
compute_modify newtemp dynamic yes extra 600 :pre
compute_modify myTemp extra/dof 0
compute_modify newtemp dynamic/dof yes extra/dof 600 :pre
[Description:]
Modify one or more parameters of a previously defined compute. Not
all compute styles support all parameters.
The {extra} keyword refers to how many degrees-of-freedom are
subtracted (typically from 3N) as a normalizing factor in a
temperature computation. Only computes that compute a temperature use
this option. The default is 2 or 3 for "2d or 3d
The {extra/dof} or {extra} keyword refers to how many
degrees-of-freedom are subtracted (typically from 3N) as a normalizing
factor in a temperature computation. Only computes that compute a
temperature use this option. The default is 2 or 3 for "2d or 3d
systems"_dimension.html which is a correction factor for an ensemble
of velocities with zero total linear momentum. For compute
temp/partial, if one or more velocity components are excluded, the
@ -43,14 +45,21 @@ number for the {extra} parameter if you need to add
degrees-of-freedom. See the "compute
temp/asphere"_compute_temp_asphere.html command for an example.
The {dynamic} keyword determines whether the number of atoms N in the
compute group is re-computed each time a temperature is computed.
Only compute styles that calculate a temperature use this option. By
default, N is assumed to be constant. If you are adding atoms to the
system (see the "fix pour"_fix_pour.html or "fix
deposit"_fix_deposit.html commands) or expect atoms to be lost
(e.g. due to evaporation), then this option should be used to insure
the temperature is correctly normalized.
The {dynamic/dof} or {dynamic} keyword determines whether the number
of atoms N in the compute group and their associated degrees of
freedom are re-computed each time a temperature is computed. Only
compute styles that calculate a temperature use this option. By
default, N and their DOF are assumed to be constant. If you are
adding atoms or molecules to the system (see the "fix
pour"_fix_pour.html, "fix deposit"_fix_deposit.html, and "fix
gcmc"_fix_gcmc.html commands) or expect atoms or molecules to be lost
(e.g. due to exiting the simulation box or via "fix
evaporate"_fix_evaporate.html), then this option should be used to
insure the temperature is correctly normalized.
NOTE: The {extra} and {dynamic} keywords should not be used as they
are deprecated (March 2017) and will eventually be disabled. Instead,
use the equivalent {extra/dof} and {dynamic/dof} keywords.
[Restrictions:] none
@ -60,5 +69,5 @@ the temperature is correctly normalized.
[Default:]
The option defaults are extra = 2 or 3 for 2d or 3d systems and
dynamic = no.
The option defaults are extra/dof = 2 or 3 for 2d or 3d systems and
dynamic/dof = no.

View File

@ -33,7 +33,7 @@ passing thru periodic boundaries. For computation of the non-Gaussian
parameter of mean-squared displacement, see the "compute
msd/nongauss"_compute_msd_nongauss.html command.
A vector of four quantites is calculated by this compute. The first 3
A vector of four quantities is calculated by this compute. The first 3
elements of the vector are the squared dx,dy,dz displacements, summed
and averaged over atoms in the group. The 4th element is the total
squared displacement, i.e. (dx*dx + dy*dy + dz*dz), summed and

View File

@ -35,7 +35,7 @@ chunk/atom"_compute_chunk_atom.html doc page and "Section
defined and examples of how they can be used to measure properties of
a system.
Four quantites are calculated by this compute for each chunk. The
Four quantities are calculated by this compute for each chunk. The
first 3 quantities are the squared dx,dy,dz displacements of the
center-of-mass. The 4th component is the total squared displacement,
i.e. (dx*dx + dy*dy + dz*dz) of the center-of-mass. These

View File

@ -30,12 +30,12 @@ Define a computation that calculates the mean-squared displacement
(MSD) and non-Gaussian parameter (NGP) of the group of atoms,
including all effects due to atoms passing thru periodic boundaries.
A vector of three quantites is calculated by this compute. The first
A vector of three quantities is calculated by this compute. The first
element of the vector is the total squared dx,dy,dz displacements
drsquared = (dx*dx + dy*dy + dz*dz) of atoms, and the second is the
fourth power of these displacements drfourth = (dx*dx + dy*dy +
dz*dz)*(dx*dx + dy*dy + dz*dz), summed and averaged over atoms in the
group. The 3rd component is the nonGaussian diffusion paramter NGP =
group. The 3rd component is the nonGaussian diffusion parameter NGP =
3*drfourth/(5*drsquared*drsquared), i.e.
:c,image(Eqs/compute_msd_nongauss.jpg)
@ -48,7 +48,7 @@ others.
If the {com} option is set to {yes} then the effect of any drift in
the center-of-mass of the group of atoms is subtracted out before the
displacment of each atom is calcluated.
displacment of each atom is calculated.
See the "compute msd"_compute_msd.html doc page for further important
NOTEs, which also apply to this compute.

View File

@ -15,17 +15,19 @@ compute ID group-ID orientorder/atom keyword values ... :pre
ID, group-ID are documented in "compute"_compute.html command :ulb,l
orientorder/atom = style name of this compute command :l
one or more keyword/value pairs may be appended :l
keyword = {cutoff} or {nnn} or {degrees}
keyword = {cutoff} or {nnn} or {degrees} or {components}
{cutoff} value = distance cutoff
{nnn} value = number of nearest neighbors
{degrees} values = nlvalues, l1, l2,... :pre
{degrees} values = nlvalues, l1, l2,...
{components} value = ldegree :pre
:ule
[Examples:]
compute 1 all orientorder/atom
compute 1 all orientorder/atom degrees 5 4 6 8 10 12 nnn NULL cutoff 1.5 :pre
compute 1 all orientorder/atom degrees 5 4 6 8 10 12 nnn NULL cutoff 1.5
compute 1 all orientorder/atom degrees 4 6 components 6 nnn NULL cutoff 3.0 :pre
[Description:]
@ -62,14 +64,21 @@ specified distance cutoff are used.
The optional keyword {degrees} defines the list of order parameters to
be computed. The first argument {nlvalues} is the number of order
parameters. This is followed by that number of integers giving the
degree of each order parameter. Because {Q}2 and all odd-degree
order parameters are zero for atoms in cubic crystals
(see "Steinhardt"_#Steinhardt), the default order parameters
are {Q}4, {Q}6, {Q}8, {Q}10, and {Q}12. For the
FCC crystal with {nnn}=12, {Q}4 = sqrt(7/3)/8 = 0.19094....
The numerical values of all order parameters up to {Q}12
for a range of commonly encountered high-symmetry structures are given
in Table I of "Mickel et al."_#Mickel.
degree of each order parameter. Because {Q}2 and all odd-degree order
parameters are zero for atoms in cubic crystals (see
"Steinhardt"_#Steinhardt), the default order parameters are {Q}4,
{Q}6, {Q}8, {Q}10, and {Q}12. For the FCC crystal with {nnn}=12, {Q}4
= sqrt(7/3)/8 = 0.19094.... The numerical values of all order
parameters up to {Q}12 for a range of commonly encountered
high-symmetry structures are given in Table I of "Mickel et
al."_#Mickel.
The optional keyword {components} will output the components of the
normalized complex vector {Ybar_lm} of degree {ldegree}, which must be
explicitly included in the keyword {degrees}. This option can be used
in conjunction with "compute coord_atom"_compute_coord_atom.html to
calculate the ten Wolde's criterion to identify crystal-like
particles, as discussed in "ten Wolde"_#tenWolde2.
The value of {Ql} is set to zero for atoms not in the
specified compute group, as well as for atoms that have less than
@ -95,8 +104,16 @@ the neighbor list.
[Output info:]
This compute calculates a per-atom array with {nlvalues} columns, giving the
{Ql} values for each atom, which are real numbers on the range 0 <= {Ql} <= 1.
This compute calculates a per-atom array with {nlvalues} columns,
giving the {Ql} values for each atom, which are real numbers on the
range 0 <= {Ql} <= 1.
If the keyword {components} is set, then the real and imaginary parts
of each component of (normalized) {Ybar_lm} will be added to the
output array in the following order: Re({Ybar_-m}) Im({Ybar_-m})
Re({Ybar_-m+1}) Im({Ybar_-m+1}) ... Re({Ybar_m}) Im({Ybar_m}). This
way, the per-atom array will have a total of {nlvalues}+2*(2{l}+1)
columns.
These values can be accessed by any command that uses
per-atom values from a compute as input. See "Section
@ -107,15 +124,25 @@ options.
[Related commands:]
"compute coord/atom"_compute_coord_atom.html, "compute centro/atom"_compute_centro_atom.html, "compute hexorder/atom"_compute_hexorder_atom.html
"compute coord/atom"_compute_coord_atom.html, "compute
centro/atom"_compute_centro_atom.html, "compute
hexorder/atom"_compute_hexorder_atom.html
[Default:]
The option defaults are {cutoff} = pair style cutoff, {nnn} = 12, {degrees} = 5 4 6 8 10 12 i.e. {Q}4, {Q}6, {Q}8, {Q}10, and {Q}12.
The option defaults are {cutoff} = pair style cutoff, {nnn} = 12,
{degrees} = 5 4 6 8 10 12 i.e. {Q}4, {Q}6, {Q}8, {Q}10, and {Q}12.
:line
:link(Steinhardt)
[(Steinhardt)] P. Steinhardt, D. Nelson, and M. Ronchetti, Phys. Rev. B 28, 784 (1983).
[(Steinhardt)] P. Steinhardt, D. Nelson, and M. Ronchetti,
Phys. Rev. B 28, 784 (1983).
:link(Mickel)
[(Mickel)] W. Mickel, S. C. Kapfer, G. E. Schroeder-Turkand, K. Mecke, J. Chem. Phys. 138, 044501 (2013).
[(Mickel)] W. Mickel, S. C. Kapfer, G. E. Schroeder-Turkand, K. Mecke,
J. Chem. Phys. 138, 044501 (2013).
:link(tenWolde2)
[(tenWolde)] P. R. ten Wolde, M. J. Ruiz-Montero, D. Frenkel,
J. Chem. Phys. 104, 9932 (1996).

View File

@ -43,7 +43,7 @@ style van der Waals interaction or not) is tallied in {evdwl}. If
as a global scalar by this compute. This is useful when using
"pair_style hybrid"_pair_hybrid.html if you want to know the portion
of the total energy contributed by one sub-style. If {evalue} is
specfied as {evdwl} or {ecoul}, then just that portion of the energy
specified as {evdwl} or {ecoul}, then just that portion of the energy
is stored as a global scalar.
NOTE: The energy returned by the {evdwl} keyword does not include tail
@ -52,7 +52,7 @@ corrections, even if they are enabled via the
Some pair styles tally additional quantities, e.g. a breakdown of
potential energy into a dozen or so components is tallied by the
"pair_style reax"_pair_reax.html commmand. These values (1 or more)
"pair_style reax"_pair_reax.html command. These values (1 or more)
are stored as a global vector by this compute. See the doc page for
"individual pair styles"_pair_style.html for info on these values.

View File

@ -47,7 +47,7 @@ force cutoff distance for that interaction, as defined by the
"pair_style"_pair_style.html and "pair_coeff"_pair_coeff.html
commands.
The value {dist} is the distance bewteen the pair of atoms.
The value {dist} is the distance between the pair of atoms.
The value {eng} is the interaction energy for the pair of atoms.

View File

@ -49,9 +49,9 @@ pairwise interactions between 1-4 atoms. The energy contribution of
these terms is included in the pair energy, not the dihedral energy.
The KSpace contribution is calculated using the method in
"(Heyes)"_#Heyes for the Ewald method and a related method for PPPM,
"(Heyes)"_#Heyes1 for the Ewald method and a related method for PPPM,
as specified by the "kspace_style pppm"_kspace_style.html command.
For PPPM, the calcluation requires 1 extra FFT each timestep that
For PPPM, the calculation requires 1 extra FFT each timestep that
per-atom energy is calculated. This "document"_PDF/kspace.pdf
describes how the long-range per-atom energy calculation is performed.
@ -97,5 +97,5 @@ stress/atom"_compute_stress_atom.html
:line
:link(Heyes)
:link(Heyes1)
[(Heyes)] Heyes, Phys Rev B 49, 755 (1994),

View File

@ -44,7 +44,7 @@ This compute calculates a per-atom vector, which can be accessed by
any command that uses per-atom values from a compute as input. See
Section_howto 15 for an overview of LAMMPS output options.
The per-atom vector values are unitlesss numbers (lambda) >= 0.0.
The per-atom vector values are unitless numbers (lambda) >= 0.0.
[Restrictions:]

View File

@ -70,7 +70,7 @@ means include all terms except the kinetic energy {ke}.
Details of how LAMMPS computes the virial efficiently for the entire
system, including for manybody potentials and accounting for the
effects of periodic boundary conditions are discussed in
"(Thompson)"_#Thompson.
"(Thompson)"_#Thompson1.
The temperature and kinetic energy tensor is not calculated by this
compute, but rather by the temperature compute specified with the
@ -89,7 +89,7 @@ commands"_compute.html to determine which ones include a bias.
Also note that the N in the first formula above is really
degrees-of-freedom divided by d = dimensionality, where the DOF value
is calcluated by the temperature compute. See the various "compute
is calculated by the temperature compute. See the various "compute
temperature"_compute.html styles for details.
A compute of this style with the ID of "thermo_press" is created when
@ -150,5 +150,5 @@ stress/atom"_compute_stress_atom.html,
:line
:link(Thompson)
:link(Thompson1)
[(Thompson)] Thompson, Plimpton, Mattson, J Chem Phys, 131, 154107 (2009).

View File

@ -64,7 +64,7 @@ can only be used if the {compress} keyword was set to {yes} for the
"compute chunk/atom"_compute_chunk_atom.html command referenced by
chunkID. This means that the original chunk IDs (e.g. molecule IDs)
will have been compressed to remove chunk IDs with no atoms assigned
to them. Thus a compresed chunk ID of 3 may correspond to an original
to them. Thus a compressed chunk ID of 3 may correspond to an original
chunk ID (molecule ID in this case) of 415. The {id} attribute will
then be 415 for the 3rd chunk.

View File

@ -10,21 +10,27 @@ compute rdf command :h3
[Syntax:]
compute ID group-ID rdf Nbin itype1 jtype1 itype2 jtype2 ... :pre
compute ID group-ID rdf Nbin itype1 jtype1 itype2 jtype2 ... keyword/value ... :pre
ID, group-ID are documented in "compute"_compute.html command
rdf = style name of this compute command
Nbin = number of RDF bins
itypeN = central atom type for Nth RDF histogram (see asterisk form below)
jtypeN = distribution atom type for Nth RDF histogram (see asterisk form below) :ul
ID, group-ID are documented in "compute"_compute.html command :ulb,l
rdf = style name of this compute command :l
Nbin = number of RDF bins :l
itypeN = central atom type for Nth RDF histogram (see asterisk form below) :l
jtypeN = distribution atom type for Nth RDF histogram (see asterisk form below) :l
zero or more keyword/value pairs may be appended :l
keyword = {cutoff} :l
{cutoff} value = Rcut
Rcut = cutoff distance for RDF computation (distance units) :pre
:ule
[Examples:]
compute 1 all rdf 100
compute 1 all rdf 100 1 1
compute 1 all rdf 100 * 3
compute 1 all rdf 100 * 3 cutoff 5.0
compute 1 fluid rdf 500 1 1 1 2 2 1 2 2
compute 1 fluid rdf 500 1*3 2 5 *10 :pre
compute 1 fluid rdf 500 1*3 2 5 *10 cutoff 3.5 :pre
[Description:]
@ -32,7 +38,8 @@ Define a computation that calculates the radial distribution function
(RDF), also called g(r), and the coordination number for a group of
particles. Both are calculated in histogram form by binning pairwise
distances into {Nbin} bins from 0.0 to the maximum force cutoff
defined by the "pair_style"_pair_style.html command. The bins are of
defined by the "pair_style"_pair_style.html command or the cutoff
distance {Rcut} specified via the {cutoff} keyword. The bins are of
uniform size in radial distance. Thus a single bin encompasses a thin
shell of distances in 3d and a thin ring of distances in 2d.
@ -41,17 +48,41 @@ NOTE: If you have a bonded system, then the settings of
interactions between atoms in the same bond, angle, or dihedral. This
is the default setting for the "special_bonds"_special_bonds.html
command, and means those pairwise interactions do not appear in the
neighbor list. Because this fix uses the neighbor list, it also means
neighbor list. Because this fix uses a neighbor list, it also means
those pairs will not be included in the RDF. This does not apply when
using long-range coulomb ({coul/long}, {coul/msm}, {coul/wolf} or
similar. One way to get around this would be to set special_bond
scaling factors to very tiny numbers that are not exactly zero
(e.g. 1.0e-50). Another workaround is to write a dump file, and use
the "rerun"_rerun.html command to compute the RDF for snapshots in the
dump file. The rerun script can use a
using long-range coulomb interactions ({coul/long}, {coul/msm},
{coul/wolf} or similar. One way to get around this would be to set
special_bond scaling factors to very tiny numbers that are not exactly
zero (e.g. 1.0e-50). Another workaround is to write a dump file, and
use the "rerun"_rerun.html command to compute the RDF for snapshots in
the dump file. The rerun script can use a
"special_bonds"_special_bonds.html command that includes all pairs in
the neighbor list.
By default the RDF is computed out to the maximum force cutoff defined
by the "pair_style"_pair_style.html command. If the {cutoff} keyword
is used, then the RDF is computed accurately out to the {Rcut} > 0.0
distance specified.
NOTE: Normally, you should only use the {cutoff} keyword if no pair
style is defined, e.g. the "rerun"_rerun.html command is being used to
post-process a dump file of snapshots. Or if you really want the RDF
for distances beyond the pair_style force cutoff and cannot easily
post-process a dump file to calculate it. This is because using the
{cutoff} keyword incurs extra computation and possibly communication,
which may slow down your simulation. If you specify a {Rcut} <= force
cutoff, you will force an additional neighbor list to be built at
every timestep this command is invoked (or every reneighboring
timestep, whichever is less frequent), which is inefficient. LAMMPS
will warn you if this is the case. If you specify a {Rcut} > force
cutoff, you must insure ghost atom information out to {Rcut} + {skin}
is communicated, via the "comm_modify cutoff"_comm_modify.html
command, else the RDF computation cannot be performed, and LAMMPS will
give an error message. The {skin} value is what is specified with the
"neighbor"_neighbor.html command. In this case, you are forcing a
large neighbor list to be built just for the RDF computation, and
extra communication to be performed every timestep.
The {itypeN} and {jtypeN} arguments are optional. These arguments
must come in pairs. If no pairs are listed, then a single histogram
is computed for g(r) between all atom types. If one or more pairs are
@ -153,4 +184,6 @@ change from zero to one at the location of the spike in g(r).
"fix ave/time"_fix_ave_time.html
[Default:] none
[Default:]
The keyword defaults are cutoff = 0.0 (use the pairwise force cutoff).

View File

@ -123,7 +123,7 @@ The {vx}, {vy}, {vz}, {fx}, {fy}, {fz} attributes are components of
the COM velocity and force on the COM of the body.
The {omegax}, {omegay}, and {omegaz} attributes are the angular
velocity componennts of the body around its COM.
velocity components of the body around its COM.
The {angmomx}, {angmomy}, and {angmomz} attributes are the angular
momentum components of the body around its COM.

View File

@ -93,7 +93,7 @@ parameters will denote the z1=h, z2=k, and z3=l (in a global since)
zone axis of an intersecting Ewald sphere. Diffraction intensities
will only be computed at the intersection of the reciprocal lattice
mesh and a {dR_Ewald} thick surface of the Ewald sphere. See the
example 3D intestiety data and the intersection of a \[010\] zone axis
example 3D intensity data and the intersection of a \[010\] zone axis
in the below image.
:c,image(JPG/saed_ewald_intersect_small.jpg,JPG/saed_ewald_intersect.jpg)

View File

@ -35,7 +35,7 @@ any command that uses per-particle values from a compute as input.
See "Section 6.15"_Section_howto.html#howto_15 for an overview of
LAMMPS output options.
The per-particle values will be given dimentionless, see "units"_units.html.
The per-particle values will be given dimensionless, see "units"_units.html.
[Restrictions:]

View File

@ -24,7 +24,7 @@ twojmax = band limit for bispectrum components (non-negative integer) :l
R_1, R_2,... = list of cutoff radii, one for each type (distance units) :l
w_1, w_2,... = list of neighbor weights, one for each type :l
zero or more keyword/value pairs may be appended :l
keyword = {diagonal} or {rmin0} or {switchflag} :l
keyword = {diagonal} or {rmin0} or {switchflag} or {bzeroflag} :l
{diagonal} value = {0} or {1} or {2} or {3}
{0} = all j1, j2, j <= twojmax, j2 <= j1
{1} = subset satisfying j1 == j2
@ -33,7 +33,10 @@ keyword = {diagonal} or {rmin0} or {switchflag} :l
{rmin0} value = parameter in distance to angle conversion (distance units)
{switchflag} value = {0} or {1}
{0} = do not use switching function
{1} = use switching function :pre
{1} = use switching function
{bzeroflag} value = {0} or {1}
{0} = do not subtract B0
{1} = subtract B0 :pre
:ule
[Examples:]
@ -50,12 +53,12 @@ for each atom in a group.
Bispectrum components of an atom are order parameters characterizing
the radial and angular distribution of neighbor atoms. The detailed
mathematical definition is given in the paper by Thompson et
al. "(Thompson)"_#Thompson2014
al. "(Thompson)"_#Thompson20141
The position of a neighbor atom {i'} relative to a central atom {i} is
a point within the 3D ball of radius {R_ii' = rcutfac*(R_i + R_i')}
Bartok et al. "(Bartok)"_#Bartok2010, proposed mapping this 3D ball
Bartok et al. "(Bartok)"_#Bartok20101, proposed mapping this 3D ball
onto the 3-sphere, the surface of the unit ball in a four-dimensional
space. The radial distance {r} within {R_ii'} is mapped on to a third
polar angle {theta0} defined by,
@ -92,7 +95,7 @@ The expansion coefficients {u^j_m,m'} are complex-valued and they are
not directly useful as descriptors, because they are not invariant
under rotation of the polar coordinate frame. However, the following
scalar triple products of expansion coefficients can be shown to be
real-valued and invariant under rotation "(Bartok)"_#Bartok2010.
real-valued and invariant under rotation "(Bartok)"_#Bartok20101.
:c,image(Eqs/compute_sna_atom3.jpg)
@ -153,6 +156,12 @@ ordered in which they are listed
The keyword {switchflag} can be used to turn off the switching
function.
The keyword {bzeroflag} determines whether or not {B0}, the bispectrum
components of an atom with no neighbors, are subtracted from
the calculated bispectrum components. This optional keyword is only
available for compute {sna/atom}, as {snad/atom} and {snav/atom}
are unaffected by the removal of constant terms.
NOTE: If you have a bonded system, then the settings of
"special_bonds"_special_bonds.html command can remove pairwise
interactions between atoms in the same bond, angle, or dihedral. This
@ -222,15 +231,15 @@ LAMMPS"_Section_start.html#start_3 section for more info.
[Default:]
The optional keyword defaults are {diagonal} = 0, {rmin0} = 0,
{switchflag} = 1.
{switchflag} = 1, {bzeroflag} = 0.
:line
:link(Thompson2014)
:link(Thompson20141)
[(Thompson)] Thompson, Swiler, Trott, Foiles, Tucker, under review, preprint
available at "arXiv:1409.3880"_http://arxiv.org/abs/1409.3880
:link(Bartok2010)
:link(Bartok20101)
[(Bartok)] Bartok, Payne, Risi, Csanyi, Phys Rev Lett, 104, 136403 (2010).
:link(Meremianin2006)

View File

@ -74,7 +74,7 @@ other atoms in the simulation, not just with other atoms in the group.
Details of how LAMMPS computes the virial for individual atoms for
either pairwise or manybody potentials, and including the effects of
periodic boundary conditions is discussed in "(Thompson)"_#Thompson.
periodic boundary conditions is discussed in "(Thompson)"_#Thompson2.
The basic idea for manybody potentials is to treat each component of
the force computation between a small cluster of atoms in the same
manner as in the formula above for bond, angle, dihedral, etc
@ -89,10 +89,10 @@ pairwise interactions between 1-4 atoms. The virial contribution of
these terms is included in the pair virial, not the dihedral virial.
The KSpace contribution is calculated using the method in
"(Heyes)"_#Heyes for the Ewald method and by the methodology described
in "(Sirk)"_#Sirk for PPPM. The choice of KSpace solver is specified
"(Heyes)"_#Heyes2 for the Ewald method and by the methodology described
in "(Sirk)"_#Sirk1 for PPPM. The choice of KSpace solver is specified
by the "kspace_style pppm"_kspace_style.html command. Note that for
PPPM, the calcluation requires 6 extra FFTs each timestep that
PPPM, the calculation requires 6 extra FFTs each timestep that
per-atom stress is calculated. Thus it can significantly increase the
cost of the PPPM calculation if it is needed on a large fraction of
the simulation timesteps.
@ -159,11 +159,11 @@ The per-atom array values will be in pressure*volume
:line
:link(Heyes)
:link(Heyes2)
[(Heyes)] Heyes, Phys Rev B 49, 755 (1994),
:link(Sirk)
:link(Sirk1)
[(Sirk)] Sirk, Moore, Brown, J Chem Phys, 138, 064505 (2013).
:link(Thompson)
:link(Thompson2)
[(Thompson)] Thompson, Plimpton, Mattson, J Chem Phys, 131, 154107 (2009).

View File

@ -138,7 +138,7 @@ This compute is part of the ASPHERE 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 compute requires that atoms store angular momementum and a
This compute requires that atoms store angular momentum and a
quaternion as defined by the "atom_style ellipsoid"_atom_style.html
command.

View File

@ -120,7 +120,7 @@ This compute is part of the BODY 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 compute requires that atoms store angular momementum and a
This compute requires that atoms store angular momentum and a
quaternion as defined by the "atom_style body"_atom_style.html
command.

View File

@ -44,7 +44,7 @@ compute 1 fluid temp/chunk molchunk bias tpartial adof 2.0 :pre
Define a computation that calculates the temperature of a group of
atoms that are also in chunks, after optionally subtracting out the
center-of-mass velocity of each chunk. By specifying optional values,
it can also calulate the per-chunk temperature or energies of the
it can also calculate the per-chunk temperature or energies of the
multiple chunks of atoms.
In LAMMPS, chunks are collections of atoms defined by a "compute
@ -122,7 +122,7 @@ concept is somewhat ill-defined. In some cases, you can use the
{adof} and {cdof} keywords to adjust the calculated degress of freedom
appropriately, as explained below.
Note that the per-chunk temperature calulated by this compute and the
Note that the per-chunk temperature calculated by this compute and the
"fix ave/chunk temp"_fix_ave_chunk.html command can be different.
This compute calculates the temperature for each chunk for a single
snapshot. Fix ave/chunk can do that but can also time average those
@ -208,7 +208,7 @@ This compute also optionally calculates a global array, if one or more
of the optional values are specified. The number of rows in the array
= the number of chunks {Nchunk} as calculated by the specified
"compute chunk/atom"_compute_chunk_atom.html command. The number of
columns is the number of specifed values (1 or more). These values
columns is the number of specified values (1 or more). These values
can be accessed by any command that uses global array values from a
compute as input. Again, see "Section
6.15"_Section_howto.html#howto_15 for an overview of LAMMPS output

View File

@ -27,7 +27,7 @@ compute core_shells all temp/cs cores shells :pre
Define a computation that calculates the temperature of a system based
on the center-of-mass velocity of atom pairs that are bonded to each
other. This compute is designed to be used with the adiabatic
core/shell model of "(Mitchell and Finchham)"_#MitchellFinchham. See
core/shell model of "(Mitchell and Finchham)"_#MitchellFinchham1. See
"Section 6.25"_Section_howto.html#howto_25 of the manual for an
overview of the model as implemented in LAMMPS. Specifically, this
compute enables correct temperature calculation and thermostatting of
@ -114,6 +114,6 @@ temp/chunk"_compute_temp_chunk.html
:line
:link(MitchellFinchham)
:link(MitchellFinchham1)
[(Mitchell and Finchham)] Mitchell, Finchham, J Phys Condensed Matter,
5, 1031-1038 (1993).

View File

@ -43,7 +43,7 @@ atoms, after subtracting out a spatially-averaged center-of-mass
velocity field, before computing the kinetic energy. This can be
useful for thermostatting a collection of atoms undergoing a complex
flow, e.g. via a profile-unbiased thermostat (PUT) as described in
"(Evans)"_#Evans. A compute of this style can be used by any command
"(Evans)"_#Evans1. A compute of this style can be used by any command
that computes a temperature, e.g. "thermo_modify"_thermo_modify.html,
"fix temp/rescale"_fix_temp_rescale.html, "fix npt"_fix_nh.html, etc.
@ -75,7 +75,7 @@ atoms (sum of 1/2 m v^2), dim = 2 or 3 = dimensionality of the
simulation, N = number of atoms in the group, k = Boltzmann constant,
and T = temperature. The dim*Nx*Ny*Nz term are degrees of freedom
subtracted to adjust for the removal of the center-of-mass velocity in
each of Nx*Ny*Nz bins, as discussed in the "(Evans)"_#Evans paper.
each of Nx*Ny*Nz bins, as discussed in the "(Evans)"_#Evans1 paper.
If the {out} keyword is used with a {tensor} value, which is the
default, a kinetic energy tensor, stored as a 6-element vector, is
@ -118,7 +118,7 @@ needed, the subtracted degrees-of-freedom can be altered using the
NOTE: When using the {out} keyword with a value of {bin}, the
calculated temperature for each bin does not include the
degrees-of-freedom adjustment described in the preceeding paragraph,
degrees-of-freedom adjustment described in the preceding paragraph,
for fixes that constrain molecular motion. It does include the
adjustment due to the {extra} option, which is applied to each bin.
@ -126,7 +126,7 @@ See "this howto section"_Section_howto.html#howto_16 of the manual for
a discussion of different ways to compute temperature and perform
thermostatting. Using this compute in conjunction with a
thermostatting fix, as explained there, will effectively implement a
profile-unbiased thermostat (PUT), as described in "(Evans)"_#Evans.
profile-unbiased thermostat (PUT), as described in "(Evans)"_#Evans1.
[Output info:]
@ -178,5 +178,5 @@ The option default is out = tensor.
:line
:link(Evans)
:link(Evans1)
[(Evans)] Evans and Morriss, Phys Rev Lett, 56, 2172-2175 (1986).

View File

@ -27,7 +27,7 @@ function (VACF), averaged over a group of atoms. Each atom's
contribution to the VACF is its current velocity vector dotted into
its initial velocity vector at the time the compute was specified.
A vector of four quantites is calculated by this compute. The first 3
A vector of four quantities is calculated by this compute. The first 3
elements of the vector are vx * vx0 (and similarly for the y and z
components), summed and averaged over atoms in the group. Vx is the
current x-component of velocity for the atom, vx0 is the initial

View File

@ -217,6 +217,10 @@ This compute is part of the VORONOI 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.
It also requiers you have a copy of the Voro++ library built and
installed on your system. See instructions on obtaining and
installing the Voro++ software in the src/VORONOI/README file.
[Related commands:]
"dump custom"_dump.html, "dump local"_dump.html

View File

@ -35,6 +35,7 @@ Computes :h1
compute_erotate_sphere_atom
compute_event_displace
compute_fep
compute_global_atom
compute_group_group
compute_gyration
compute_gyration_chunk

View File

@ -101,7 +101,7 @@ positions.
For the {random} style, N particles are added to the system at
randomly generated coordinates, which can be useful for generating an
amorphous system. The particles are created one by one using the
speficied random number {seed}, resulting in the same set of particles
specified random number {seed}, resulting in the same set of particles
coordinates, independent of how many processors are being used in the
simulation. If the {region-ID} argument is specified as NULL, then
the created particles will be anywhere in the simulation box. If a
@ -134,6 +134,17 @@ not overlap existing atoms inappropriately, especially if molecules
are being added. The "delete_atoms"_delete_atoms.html command can be
used to remove overlapping atoms or molecules.
NOTE: You cannot use any of the styles explained above to create atoms
that are outside the simulation box; they will just be ignored by
LAMMPS. This is true even if you are using shrink-wrapped box
boundaries, as specified by the "boundary"_boundary.html command.
However, you can first use the "change_box"_change_box.html command to
temporarily expand the box, then add atoms via create_atoms, then
finally use change_box command again if needed to re-shrink-wrap the
new atoms. See the "change_box"_change_box.html doc page for an
example of how to do this, using the create_atoms {single} style to
insert a new atom outside the current simulation box.
:line
Individual atoms are inserted by this command, unless the {mol}

View File

@ -10,21 +10,25 @@ dihedral_style charmm command :h3
dihedral_style charmm/intel command :h3
dihedral_style charmm/kk command :h3
dihedral_style charmm/omp command :h3
dihedral_style charmmfsh command :h3
[Syntax:]
dihedral_style charmm :pre
dihedral_style style :pre
style = {charmm} or {charmmfsh} :ul
[Examples:]
dihedral_style charmm
dihedral_style charmmfsh
dihedral_coeff 1 0.2 1 180 1.0
dihedral_coeff 2 1.8 1 0 1.0
dihedral_coeff 1 3.1 2 180 0.5 :pre
[Description:]
The {charmm} dihedral style uses the potential
The {charmm} and {charmmfsh} dihedral styles use the potential
:c,image(Eqs/dihedral_charmm.jpg)
@ -34,6 +38,14 @@ field (see comment on weighting factors below). See
"(Cornell)"_#dihedral-Cornell for a description of the AMBER force
field.
NOTE: The newer {charmmfsh} style was released in March 2017. We
recommend it be used instead of the older {charmm} style when running
a simulation with the CHARMM force field and Coulomb cutoffs, via the
"pair_style lj/charmmfsw/coul/charmmfsh"_pair_charmm.html command.
Otherwise the older {charmm} style is fine to use. See the discussion
below and more details on the "pair_style charmm"_pair_charmm.html doc
page.
The following coefficients must be defined for each dihedral type via the
"dihedral_coeff"_dihedral_coeff.html command as in the example above, or in
the data file or restart files read by the "read_data"_read_data.html
@ -73,13 +85,28 @@ special_bonds 1-4 scaling factor to 0.0 (which is the
default). Otherwise 1-4 non-bonded interactions in dihedrals will be
computed twice.
Also note that for AMBER force fields, which use pair styles with
"lj/cut", the special_bonds 1-4 scaling factor should be set to the
AMBER defaults (1/2 and 5/6) and all the dihedral weighting factors
(4th coeff above) must be set to 0.0. In this case, you can use any
pair style you wish, since the dihedral does not need any
Lennard-Jones parameter information and will not compute any 1-4
non-bonded interactions.
For simulations using the CHARMM force field with a Coulomb cutoff,
the difference between the {charmm} and {charmmfsh} styles is in the
computation of the 1-4 non-bond interactions, though only if the
distance between the two atoms is within the switching region of the
pairwise potential defined by the corresponding CHARMM pair style,
i.e. within the outer cutoff specified for the pair style. The
{charmmfsh} style should only be used when using the "pair_style
lj/charmmfsw/coul/charmmfsh"_pair_charmm.html to make the Coulombic
pairwise calculations consistent. Use the {charmm} style with
long-range Coulombics or the older "pair_style
lj/charmm/coul/charmm"_pair_charmm.html command. See the discussion
on the "CHARMM pair_style"_pair_charmm.html doc page for details.
Note that for AMBER force fields, which use pair styles with "lj/cut",
the special_bonds 1-4 scaling factor should be set to the AMBER
defaults (1/2 and 5/6) and all the dihedral weighting factors (4th
coeff above) must be set to 0.0. In this case, you can use any pair
style you wish, since the dihedral does not need any Lennard-Jones
parameter information and will not compute any 1-4 non-bonded
interactions. Likewise the {charmm} or {charmmfsh} styles are
identical in this case since no 1-4 non-bonded interactions are
computed.
:line

View File

@ -8,6 +8,7 @@
dihedral_style class2 command :h3
dihedral_style class2/omp command :h3
dihedral_style class2/kk command :h3
[Syntax:]

View File

@ -82,7 +82,7 @@ LAMMPS"_Section_start.html#start_3 section for more info on packages.
Unlike other dihedral styles, the hybrid dihedral style does not store
dihedral coefficient info for individual sub-styles in a "binary
restart files"_restart.html. Thus when retarting a simulation from a
restart files"_restart.html. Thus when restarting a simulation from a
restart file, you need to re-specify dihedral_coeff commands.
[Related commands:]

View File

@ -225,7 +225,7 @@ This bounding box is convenient for many visualization programs. The
meaning of the 6 character flags for "xx yy zz" is the same as above.
Note that the first two numbers on each line are now xlo_bound instead
of xlo, etc, since they repesent a bounding box. See "this
of xlo, etc, since they represent a bounding box. See "this
section"_Section_howto.html#howto_12 of the doc pages for a geometric
description of triclinic boxes, as defined by LAMMPS, simple formulas
for how the 6 bounding box extents (xlo_bound,xhi_bound,etc) are
@ -331,10 +331,7 @@ bonds and colors.
Note that {atom}, {custom}, {dcd}, {xtc}, and {xyz} style dump files
can be read directly by "VMD"_http://www.ks.uiuc.edu/Research/vmd, a
popular molecular viewing program. See
"Section 9"_Section_tools.html#vmd of the manual and the
tools/lmp2vmd/README.txt file for more information about support in
VMD for reading and visualizing LAMMPS dump files.
popular molecular viewing program.
:line
@ -545,7 +542,7 @@ that the coordinate values may be far outside the box bounds printed
with the snapshot. Using {xsu}, {ysu}, {zsu} is similar to using
{xu}, {yu}, {zu}, except that the unwrapped coordinates are scaled by
the box size. Atoms that have passed through a periodic boundary will
have the corresponding cooordinate increased or decreased by 1.0.
have the corresponding coordinate increased or decreased by 1.0.
The image flags can be printed directly using the {ix}, {iy}, {iz}
attributes. For periodic dimensions, they specify which image of the

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