197 lines
9.8 KiB
Groff
197 lines
9.8 KiB
Groff
LAMMPS (30 Mar 2018)
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using 1 OpenMP thread(s) per MPI task
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# GCMC for CO2 molecular fluid, rigid/small/nvt dynamics
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# Rigid CO2 TraPPE model
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# [Potoff and J.I. Siepmann, Vapor-liquid equilibria of
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# mixtures containing alkanes, carbon dioxide and
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# nitrogen AIChE J., 47,1676-1682 (2001)].
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# variables available on command line
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variable mu index -8.1
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variable disp index 0.5
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variable temp index 338.0
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variable lbox index 10.0
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variable spacing index 5.0
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# global model settings
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units real
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atom_style full
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boundary p p p
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pair_style lj/cut/coul/long 14
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pair_modify mix arithmetic tail yes
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kspace_style ewald 0.0001
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bond_style harmonic
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angle_style harmonic
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# box, start molecules on simple cubic lattice
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lattice sc ${spacing}
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lattice sc 5.0
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Lattice spacing in x,y,z = 5 5 5
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region box block 0 ${lbox} 0 ${lbox} 0 ${lbox} units box
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region box block 0 10.0 0 ${lbox} 0 ${lbox} units box
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region box block 0 10.0 0 10.0 0 ${lbox} units box
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region box block 0 10.0 0 10.0 0 10.0 units box
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create_box 2 box bond/types 1 angle/types 1 extra/bond/per/atom 2 extra/angle/per/atom 1 extra/special/per/atom 2
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Created orthogonal box = (0 0 0) to (10 10 10)
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1 by 1 by 1 MPI processor grid
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molecule co2mol CO2.txt
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Read molecule co2mol:
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3 atoms with max type 2
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2 bonds with max type 1
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1 angles with max type 1
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0 dihedrals with max type 0
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0 impropers with max type 0
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create_atoms 0 box mol co2mol 464563 units box
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Created 24 atoms
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Time spent = 0.00241756 secs
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# rigid CO2 TraPPE model
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pair_coeff 1 1 0.053649 2.8
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pair_coeff 2 2 0.156973 3.05
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bond_coeff 1 0 1.16
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angle_coeff 1 0 180
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# masses
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mass 1 12.0107
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mass 2 15.9994
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# MD settings
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group co2 type 1 2
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24 atoms in group co2
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neighbor 2.0 bin
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neigh_modify every 1 delay 10 check yes
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velocity all create ${temp} 54654
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velocity all create 338.0 54654
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timestep 1.0
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# rigid constraints with thermostat
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fix myrigidnvt co2 rigid/nvt/small molecule temp ${temp} ${temp} 100 mol co2mol
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fix myrigidnvt co2 rigid/nvt/small molecule temp 338.0 ${temp} 100 mol co2mol
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fix myrigidnvt co2 rigid/nvt/small molecule temp 338.0 338.0 100 mol co2mol
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8 rigid bodies with 24 atoms
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1.16 = max distance from body owner to body atom
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# dynamically update fix rigid/nvt/small temperature ndof
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fix_modify myrigidnvt dynamic/dof yes
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# gcmc
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variable tfac equal 5.0/3.0 # (3 trans + 2 rot)/(3 trans)
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fix mygcmc co2 gcmc 100 100 0 0 54341 ${temp} ${mu} ${disp} mol co2mol tfac_insert ${tfac} group co2 rigid myrigidnvt
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fix mygcmc co2 gcmc 100 100 0 0 54341 338.0 ${mu} ${disp} mol co2mol tfac_insert ${tfac} group co2 rigid myrigidnvt
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fix mygcmc co2 gcmc 100 100 0 0 54341 338.0 -8.1 ${disp} mol co2mol tfac_insert ${tfac} group co2 rigid myrigidnvt
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fix mygcmc co2 gcmc 100 100 0 0 54341 338.0 -8.1 0.5 mol co2mol tfac_insert ${tfac} group co2 rigid myrigidnvt
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fix mygcmc co2 gcmc 100 100 0 0 54341 338.0 -8.1 0.5 mol co2mol tfac_insert 1.66666666666667 group co2 rigid myrigidnvt
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# atom counts
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variable carbon atom "type==1"
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variable oxygen atom "type==2"
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group carbon dynamic co2 var carbon
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dynamic group carbon defined
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group oxygen dynamic co2 var oxygen
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dynamic group oxygen defined
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variable nC equal count(carbon)
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variable nO equal count(oxygen)
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# output
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variable tacc equal f_mygcmc[2]/(f_mygcmc[1]+0.1)
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variable iacc equal f_mygcmc[4]/(f_mygcmc[3]+0.1)
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variable dacc equal f_mygcmc[6]/(f_mygcmc[5]+0.1)
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variable racc equal f_mygcmc[8]/(f_mygcmc[7]+0.1)
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# dynamically update default temperature ndof
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compute_modify thermo_temp dynamic/dof yes
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thermo_style custom step temp press pe ke density atoms v_iacc v_dacc v_tacc v_racc v_nC v_nO
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thermo 1000
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# run
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run 20000
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Ewald initialization ...
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using 12-bit tables for long-range coulomb (../kspace.cpp:321)
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G vector (1/distance) = 0.164636
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estimated absolute RMS force accuracy = 0.0332064
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estimated relative force accuracy = 0.0001
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KSpace vectors: actual max1d max3d = 16 2 62
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kxmax kymax kzmax = 2 2 2
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WARNING: Fix gcmc using full_energy option (../fix_gcmc.cpp:485)
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0 atoms in group FixGCMC:gcmc_exclusion_group:mygcmc
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0 atoms in group FixGCMC:rotation_gas_atoms:mygcmc
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WARNING: Neighbor exclusions used with KSpace solver may give inconsistent Coulombic energies (../neighbor.cpp:472)
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Neighbor list info ...
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update every 1 steps, delay 10 steps, check yes
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max neighbors/atom: 2000, page size: 100000
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master list distance cutoff = 16
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ghost atom cutoff = 16
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binsize = 8, bins = 2 2 2
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1 neighbor lists, perpetual/occasional/extra = 1 0 0
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(1) pair lj/cut/coul/long, perpetual
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attributes: half, newton on
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pair build: half/bin/newton
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stencil: half/bin/3d/newton
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bin: standard
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Per MPI rank memory allocation (min/avg/max) = 15.62 | 15.62 | 15.62 Mbytes
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Step Temp Press PotEng KinEng Density Atoms v_iacc v_dacc v_tacc v_racc v_nC v_nO
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0 364.27579 4238.8631 -9.6809388 13.391989 0.5846359 24 0 0 0 0 8 16
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1000 330.05964 -376.0111 -13.936335 13.773831 0.65771539 27 0.21142067 0.21453147 0 0 9 18
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2000 293.79769 -321.3209 -19.049256 13.720163 0.73079488 30 0.25170944 0.25426294 0 0 10 20
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3000 348.9085 259.04079 -0.23347965 2.4267366 0.14615898 6 0.22016906 0.23200597 0 0 2 4
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4000 360.54577 -329.12072 -16.584234 15.046059 0.65771539 27 0.19173099 0.19785362 0 0 9 18
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5000 275.58628 -58.283006 -12.520856 11.500585 0.65771539 27 0.16490585 0.17329884 0 0 9 18
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6000 338.59574 364.93514 -19.866569 17.494353 0.80387436 33 0.17971759 0.18331589 0 0 11 22
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7000 286.11586 -1252.5069 -19.588667 13.361427 0.73079488 30 0.15729895 0.16220459 0 0 10 20
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8000 454.86786 -642.89382 -20.818357 21.242037 0.73079488 30 0.15500235 0.15802382 0 0 10 20
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9000 326.36695 -364.71382 -31.376162 18.48392 0.87695385 36 0.14203985 0.14510714 0 0 12 24
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10000 348.46961 -387.75245 -21.068466 18.00451 0.80387436 33 0.14000907 0.14343389 0 0 11 22
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11000 409.74257 -15.843895 -20.648252 21.170323 0.80387436 33 0.14689306 0.15117074 0 0 11 22
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12000 523.93502 1003.0729 -6.0563102 14.055757 0.43847693 18 0.15337575 0.1580166 0 0 6 12
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13000 278.14441 -717.1097 -2.3488496 4.6982087 0.29231795 12 0.15952356 0.16422306 0 0 4 8
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14000 367.89375 1239.0841 -11.203323 13.524997 0.5846359 24 0.17002439 0.17460294 0 0 8 16
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15000 197.05319 -471.14343 -9.3890758 6.2653668 0.51155641 21 0.17702612 0.18155802 0 0 7 14
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16000 138.17147 -935.93437 -2.3846783 2.3338898 0.29231795 12 0.17884346 0.18268758 0 0 4 8
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17000 245.61833 -166.1694 -5.0970057 5.3690384 0.36539744 15 0.18909252 0.19317817 0 0 5 10
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18000 232.0142 -175.732 -14.320198 9.6822635 0.65771539 27 0.18977089 0.19280537 0 0 9 18
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19000 362.01189 864.87258 -6.4515321 9.7117982 0.43847693 18 0.19207244 0.19488984 0 0 6 12
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20000 441.19548 186.19779 -18.147268 20.603546 0.73079488 30 0.19713351 0.199073 0 0 10 20
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Loop time of 16.4949 on 1 procs for 20000 steps with 30 atoms
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Performance: 104.760 ns/day, 0.229 hours/ns, 1212.498 timesteps/s
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99.4% CPU use with 1 MPI tasks x 1 OpenMP threads
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MPI task timing breakdown:
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Section | min time | avg time | max time |%varavg| %total
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---------------------------------------------------------------
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Pair | 1.8955 | 1.8955 | 1.8955 | 0.0 | 11.49
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Bond | 0.026564 | 0.026564 | 0.026564 | 0.0 | 0.16
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Kspace | 0.21215 | 0.21215 | 0.21215 | 0.0 | 1.29
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Neigh | 0.088336 | 0.088336 | 0.088336 | 0.0 | 0.54
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Comm | 0.19828 | 0.19828 | 0.19828 | 0.0 | 1.20
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Output | 0.001025 | 0.001025 | 0.001025 | 0.0 | 0.01
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Modify | 14.024 | 14.024 | 14.024 | 0.0 | 85.02
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Other | | 0.0491 | | | 0.30
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Nlocal: 30 ave 30 max 30 min
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Histogram: 1 0 0 0 0 0 0 0 0 0
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Nghost: 2094 ave 2094 max 2094 min
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Histogram: 1 0 0 0 0 0 0 0 0 0
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Neighs: 7664 ave 7664 max 7664 min
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Histogram: 1 0 0 0 0 0 0 0 0 0
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Total # of neighbors = 7664
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Ave neighs/atom = 255.467
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Ave special neighs/atom = 2
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Neighbor list builds = 20076
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Dangerous builds = 0
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Total wall time: 0:00:16
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