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lammps/examples/gcmc/log.24Mar17.gcmc.co2.g++.1
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LAMMPS (17 Mar 2017)
# GCMC for CO2 molecular fluid, rigid/small/nvt dynamics
# Rigid CO2 TraPPE model
# [Potoff and J.I. Siepmann, Vapor-liquid equilibria of
# mixtures containing alkanes, carbon dioxide and
# nitrogen AIChE J., 47,1676-1682 (2001)].
# variables available on command line
variable mu index -8.1
variable disp index 0.5
variable temp index 338.0
variable lbox index 10.0
variable spacing index 5.0
# global model settings
units real
atom_style full
boundary p p p
pair_style lj/cut/coul/long 14
pair_modify mix arithmetic tail yes
kspace_style ewald 0.0001
bond_style harmonic
angle_style harmonic
# box, start molecules on simple cubic lattice
lattice sc ${spacing}
lattice sc 5.0
Lattice spacing in x,y,z = 5 5 5
region box block 0 ${lbox} 0 ${lbox} 0 ${lbox} units box
region box block 0 10.0 0 ${lbox} 0 ${lbox} units box
region box block 0 10.0 0 10.0 0 ${lbox} units box
region box block 0 10.0 0 10.0 0 10.0 units box
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
Created orthogonal box = (0 0 0) to (10 10 10)
1 by 1 by 1 MPI processor grid
molecule co2mol CO2.txt
Read molecule co2mol:
3 atoms with 2 types
2 bonds with 1 types
1 angles with 1 types
0 dihedrals with 0 types
0 impropers with 0 types
create_atoms 0 box mol co2mol 464563 units box
Created 24 atoms
# rigid CO2 TraPPE model
pair_coeff 1 1 0.053649 2.8
pair_coeff 2 2 0.156973 3.05
bond_coeff 1 0 1.16
angle_coeff 1 0 180
# masses
mass 1 12.0107
mass 2 15.9994
# MD settings
group co2 type 1 2
24 atoms in group co2
neighbor 2.0 bin
neigh_modify every 1 delay 10 check yes
velocity all create ${temp} 54654
velocity all create 338.0 54654
timestep 1.0
# rigid constraints with thermostat
fix myrigidnvt all rigid/nvt/small molecule temp ${temp} ${temp} 100 mol co2mol
fix myrigidnvt all rigid/nvt/small molecule temp 338.0 ${temp} 100 mol co2mol
fix myrigidnvt all rigid/nvt/small molecule temp 338.0 338.0 100 mol co2mol
8 rigid bodies with 24 atoms
1.16 = max distance from body owner to body atom
fix_modify myrigidnvt dynamic/dof no
# gcmc
variable tfac equal 5.0/3.0 # (3 trans + 2 rot)/(3 trans)
fix mygcmc all gcmc 100 100 100 0 54341 ${temp} ${mu} ${disp} mol co2mol tfac_insert ${tfac} group co2 rigid myrigidnvt
fix mygcmc all gcmc 100 100 100 0 54341 338.0 ${mu} ${disp} mol co2mol tfac_insert ${tfac} group co2 rigid myrigidnvt
fix mygcmc all gcmc 100 100 100 0 54341 338.0 -8.1 ${disp} mol co2mol tfac_insert ${tfac} group co2 rigid myrigidnvt
fix mygcmc all gcmc 100 100 100 0 54341 338.0 -8.1 0.5 mol co2mol tfac_insert ${tfac} group co2 rigid myrigidnvt
fix mygcmc all gcmc 100 100 100 0 54341 338.0 -8.1 0.5 mol co2mol tfac_insert 1.66666666666667 group co2 rigid myrigidnvt
# output
variable tacc equal f_mygcmc[2]/(f_mygcmc[1]+0.1)
variable iacc equal f_mygcmc[4]/(f_mygcmc[3]+0.1)
variable dacc equal f_mygcmc[6]/(f_mygcmc[5]+0.1)
variable racc equal f_mygcmc[8]/(f_mygcmc[7]+0.1)
compute_modify thermo_temp dynamic/dof yes
thermo_style custom step temp press pe ke density atoms v_iacc v_dacc v_tacc v_racc
thermo 1000
# run
run 20000
Ewald initialization ...
WARNING: Using 12-bit tables for long-range coulomb (../kspace.cpp:321)
G vector (1/distance) = 0.164636
estimated absolute RMS force accuracy = 0.0332064
estimated relative force accuracy = 0.0001
KSpace vectors: actual max1d max3d = 16 2 62
kxmax kymax kzmax = 2 2 2
WARNING: Fix gcmc using full_energy option (../fix_gcmc.cpp:439)
0 atoms in group FixGCMC:gcmc_exclusion_group:mygcmc
0 atoms in group FixGCMC:rotation_gas_atoms:mygcmc
WARNING: Neighbor exclusions used with KSpace solver may give inconsistent Coulombic energies (../neighbor.cpp:472)
Neighbor list info ...
update every 1 steps, delay 10 steps, check yes
max neighbors/atom: 2000, page size: 100000
master list distance cutoff = 16
ghost atom cutoff = 16
binsize = 8, bins = 2 2 2
1 neighbor lists, perpetual/occasional/extra = 1 0 0
(1) pair lj/cut/coul/long, perpetual
attributes: half, newton on
pair build: half/bin/newton
stencil: half/bin/3d/newton
bin: standard
Per MPI rank memory allocation (min/avg/max) = 15.61 | 15.61 | 15.61 Mbytes
Step Temp Press PotEng KinEng Density Atoms v_iacc v_dacc v_tacc v_racc
0 364.27579 4238.8631 -9.6809388 13.391989 0.5846359 24 0 0 0 0
1000 311.39835 -327.93481 -8.6795381 9.9010062 0.51155641 21 0.13302848 0.12331626 0.6894397 0.90997852
WARNING: Using kspace solver on system with no charge (../kspace.cpp:289)
2000 905.66812 319.43347 -0.50350961 6.2991241 0.14615898 6 0.20952183 0.20430213 0.71797992 0.92626683
3000 275.57393 -719.89718 -26.534978 14.238181 0.80387436 33 0.21291069 0.20460696 0.72899202 0.9133259
4000 254.70771 -245.01902 -20.981537 13.160079 0.80387436 33 0.17245726 0.16974613 0.70145764 0.90542759
5000 96.073601 -517.98124 -34.019065 5.441166 0.87695385 36 0.14174575 0.13607057 0.6776754 0.90155771
6000 397.57265 148.92645 -7.2012893 10.665797 0.43847693 18 0.12299956 0.1202471 0.66165464 0.90274793
7000 455.4271 -347.44181 -5.9244703 12.217875 0.43847693 18 0.15182038 0.14791307 0.67904236 0.90560829
8000 301.03124 -627.45324 -13.251012 11.066909 0.5846359 24 0.16687346 0.16315516 0.6936719 0.91129375
9000 256.5747 -565.67983 -17.814128 11.981874 0.73079488 30 0.15458482 0.15131825 0.68966283 0.90993975
10000 443.60076 89.586912 -6.077863 11.900606 0.43847693 18 0.16092552 0.16020353 0.69882461 0.91422145
11000 436.43777 64.412921 -6.7128469 11.708443 0.43847693 18 0.17453966 0.17480683 0.70679243 0.91369445
12000 594.42207 849.07743 -3.3708621 10.040536 0.29231795 12 0.17461606 0.17568622 0.71175869 0.91333367
13000 426.85849 -1093.1334 -17.524618 17.813377 0.65771539 27 0.17742896 0.17792831 0.71363306 0.91450124
14000 317.75995 336.31107 -10.46774 11.681912 0.5846359 24 0.18331181 0.18427921 0.71715557 0.91652256
15000 272.65129 317.50536 -26.428336 14.087176 0.80387436 33 0.17449167 0.175957 0.71122398 0.91528038
16000 344.28567 -577.91079 -18.177927 16.077919 0.73079488 30 0.1661682 0.16781514 0.70485136 0.91508882
17000 134.55928 -193.5668 -30.297136 7.6208177 0.87695385 36 0.15965609 0.1605036 0.69658104 0.9140445
18000 231.87302 -446.07671 -14.875027 9.6763722 0.65771539 27 0.15270985 0.15351831 0.69002918 0.91372795
19000 328.6835 -280.22365 -20.001303 16.982214 0.80387436 33 0.15201017 0.15272181 0.69023195 0.91272534
20000 0 -20.39554 -0.14872889 -0 0 0 0.15600204 0.15750795 0.69503275 0.9138765
Loop time of 30.9008 on 1 procs for 20000 steps with 0 atoms
Performance: 55.921 ns/day, 0.429 hours/ns, 647.233 timesteps/s
99.8% CPU use with 1 MPI tasks x no OpenMP threads
MPI task timing breakdown:
Section | min time | avg time | max time |%varavg| %total
---------------------------------------------------------------
Pair | 2.1985 | 2.1985 | 2.1985 | 0.0 | 7.11
Bond | 0.029596 | 0.029596 | 0.029596 | 0.0 | 0.10
Kspace | 0.23123 | 0.23123 | 0.23123 | 0.0 | 0.75
Neigh | 0.16141 | 0.16141 | 0.16141 | 0.0 | 0.52
Comm | 0.20628 | 0.20628 | 0.20628 | 0.0 | 0.67
Output | 0.00068831 | 0.00068831 | 0.00068831 | 0.0 | 0.00
Modify | 28.022 | 28.022 | 28.022 | 0.0 | 90.69
Other | | 0.05058 | | | 0.16
Nlocal: 0 ave 0 max 0 min
Histogram: 1 0 0 0 0 0 0 0 0 0
Nghost: 0 ave 0 max 0 min
Histogram: 1 0 0 0 0 0 0 0 0 0
Neighs: 0 ave 0 max 0 min
Histogram: 1 0 0 0 0 0 0 0 0 0
Total # of neighbors = 0
Neighbor list builds = 40367
Dangerous builds = 118
Total wall time: 0:00:30
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