# periodic boundary conditions along all three dimensions boundary p p p # Set neighbor skin variable neigh_skin equal 2.0*${_u_distance} variable neigh_skin equal 2.0*1 neighbor ${neigh_skin} bin neighbor 2 bin # create a supercell with cubic lattice (fcc, bcc, sc, or diamond) # using 10*10*10 conventional (orthogonal) unit cells variable latticeconst_converted equal 3.140962809324265*${_u_distance} variable latticeconst_converted equal 3.140962809324265*1 lattice bcc ${latticeconst_converted} lattice bcc 3.14096280932426 Lattice spacing in x,y,z = 3.1409628 3.1409628 3.1409628 region simbox block 0 10 0 10 0 10 units lattice create_box 1 simbox Created orthogonal box = (0 0 0) to (31.409628 31.409628 31.409628) 1 by 1 by 1 MPI processor grid create_atoms 1 box Created 2000 atoms using lattice units in orthogonal box = (0 0 0) to (31.409628 31.409628 31.409628) create_atoms CPU = 0.000 seconds variable mass_converted equal 95.94*${_u_mass} variable mass_converted equal 95.94*1 kim interactions Mo #=== BEGIN kim interactions ================================== pair_style kim Morse_Shifted_GirifalcoWeizer_1959HighCutoff_Mo__MO_666830945336_004 pair_coeff * * Mo #=== END kim interactions ==================================== mass 1 ${mass_converted} mass 1 95.94 # initial volume variable v equal vol # assign formula variable V0 equal ${v} # evaluate initial value variable V0 equal 30987.6314776899 variable V0_metal equal ${V0}/(${_u_distance}*${_u_distance}*${_u_distance}) variable V0_metal equal 30987.6314776899/(${_u_distance}*${_u_distance}*${_u_distance}) variable V0_metal equal 30987.6314776899/(1*${_u_distance}*${_u_distance}) variable V0_metal equal 30987.6314776899/(1*1*${_u_distance}) variable V0_metal equal 30987.6314776899/(1*1*1) variable V0_metal_times1000 equal ${V0_metal}*1000 variable V0_metal_times1000 equal 30987.6314776899*1000 print "Initial system volume: ${V0_metal} Angstroms^3" Initial system volume: 30987.6314776899 Angstroms^3 # set the time step to 0.001 picoseconds variable timestep_converted equal 0.001*${_u_time} variable timestep_converted equal 0.001*1 timestep ${timestep_converted} timestep 0.001 variable temp_converted equal 293.15*${_u_temperature} variable temp_converted equal 293.15*1 variable Tdamp_converted equal 0.01*${_u_time} variable Tdamp_converted equal 0.01*1 variable press_converted equal 0.0*${_u_pressure} variable press_converted equal 0.0*1 variable Pdamp_converted equal 0.1*${_u_time} variable Pdamp_converted equal 0.1*1 # create initial velocities consistent with the chosen temperature velocity all create ${temp_converted} 17 mom yes rot yes velocity all create 293.15 17 mom yes rot yes # set NPT ensemble for all atoms fix ensemble all npt temp ${temp_converted} ${temp_converted} ${Tdamp_converted} iso ${press_converted} ${press_converted} ${Pdamp_converted} fix ensemble all npt temp 293.15 ${temp_converted} ${Tdamp_converted} iso ${press_converted} ${press_converted} ${Pdamp_converted} fix ensemble all npt temp 293.15 293.15 ${Tdamp_converted} iso ${press_converted} ${press_converted} ${Pdamp_converted} fix ensemble all npt temp 293.15 293.15 0.01 iso ${press_converted} ${press_converted} ${Pdamp_converted} fix ensemble all npt temp 293.15 293.15 0.01 iso 0 ${press_converted} ${Pdamp_converted} fix ensemble all npt temp 293.15 293.15 0.01 iso 0 0 ${Pdamp_converted} fix ensemble all npt temp 293.15 293.15 0.01 iso 0 0 0.1 # compute the time averages of pressure, temperature, and volume, respectively # ignore the first 5000 timesteps variable etotal_metal equal etotal/${_u_energy} variable etotal_metal equal etotal/1 variable pe_metal equal pe/${_u_energy} variable pe_metal equal pe/1 variable T_metal equal temp/${_u_temperature} variable T_metal equal temp/1 variable V_metal equal vol/(${_u_distance}*${_u_distance}*${_u_distance}) variable V_metal equal vol/(1*${_u_distance}*${_u_distance}) variable V_metal equal vol/(1*1*${_u_distance}) variable V_metal equal vol/(1*1*1) variable P_metal equal press/${_u_pressure} variable P_metal equal press/1 fix avgmyTemp all ave/time 5 20 100 v_T_metal ave running start 1000 fix avgmyPress all ave/time 5 20 100 v_P_metal ave running start 1000 fix avgmyVol all ave/time 5 20 100 v_V_metal ave running start 1000 # extract fix quantities into variables so they can be used in if-else logic later. variable T equal f_avgmyTemp variable P equal f_avgmyPress variable V equal f_avgmyVol # set error bounds for temperature and pressure in original metal units (K and bar) variable T_low equal "293.15 - 1.0" variable T_up equal "293.15 + 1.0" variable P_low equal "0.0 - 5.0" variable P_up equal "0.0 + 5.0" # print to logfile every 1000 timesteps thermo_style custom step etotal v_etotal_metal pe v_pe_metal temp v_T_metal vol v_V_metal press v_P_metal thermo 1000 # Run a simulation for at most 2000*1000 timesteps. At each 1000th time step, check # whether the temperature and pressure have converged. If yes, break. label top variable a loop 2000 run 1000 CITE-CITE-CITE-CITE-CITE-CITE-CITE-CITE-CITE-CITE-CITE-CITE-CITE Your simulation uses code contributions which should be cited: - OpenKIM Project: doi:10.1007/s11837-011-0102-6 @Article{tadmor:elliott:2011, author = {E. B. Tadmor and R. S. Elliott and J. P. Sethna and R. E. Miller and C. A. Becker}, title = {The potential of atomistic simulations and the {K}nowledgebase of {I}nteratomic {M}odels}, journal = {{JOM}}, year = 2011, volume = 63, number = 17, pages = {17}, doi = {10.1007/s11837-011-0102-6} } - OpenKIM potential: https://openkim.org/cite/MO_666830945336_004#item-citation CITE-CITE-CITE-CITE-CITE-CITE-CITE-CITE-CITE-CITE-CITE-CITE-CITE Generated 0 of 0 mixed pair_coeff terms from geometric mixing rule Neighbor list info ... update: every = 1 steps, delay = 0 steps, check = yes max neighbors/atom: 2000, page size: 100000 master list distance cutoff = 11.54372 ghost atom cutoff = 11.54372 binsize = 5.77186, bins = 6 6 6 1 neighbor lists, perpetual/occasional/extra = 1 0 0 (1) pair kim, perpetual attributes: full, newton off pair build: full/bin/atomonly stencil: full/bin/3d bin: standard Per MPI rank memory allocation (min/avg/max) = 6.659 | 6.659 | 6.659 Mbytes Step TotEng v_etotal_metal PotEng v_pe_metal Temp v_T_metal Volume v_V_metal Press v_P_metal 0 -13431.857 -13431.857 -13507.605 -13507.605 293.15 293.15 30987.631 30987.631 2610.9822 2610.9822 1000 -13356.044 -13356.044 -13429.751 -13429.751 285.25238 285.25238 31163.477 31163.477 -1658.1059 -1658.1059 Loop time of 12.0854 on 1 procs for 1000 steps with 2000 atoms Performance: 7.149 ns/day, 3.357 hours/ns, 82.745 timesteps/s, 165.489 katom-step/s 100.0% CPU use with 1 MPI tasks x 1 OpenMP threads MPI task timing breakdown: Section | min time | avg time | max time |%varavg| %total --------------------------------------------------------------- Pair | 11.974 | 11.974 | 11.974 | 0.0 | 99.08 Neigh | 0 | 0 | 0 | 0.0 | 0.00 Comm | 0.033265 | 0.033265 | 0.033265 | 0.0 | 0.28 Output | 0.00020382 | 0.00020382 | 0.00020382 | 0.0 | 0.00 Modify | 0.068206 | 0.068206 | 0.068206 | 0.0 | 0.56 Other | | 0.009407 | | | 0.08 Nlocal: 2000 ave 2000 max 2000 min Histogram: 1 0 0 0 0 0 0 0 0 0 Nghost: 8745 ave 8745 max 8745 min Histogram: 1 0 0 0 0 0 0 0 0 0 Neighs: 0 ave 0 max 0 min Histogram: 1 0 0 0 0 0 0 0 0 0 FullNghs: 820000 ave 820000 max 820000 min Histogram: 1 0 0 0 0 0 0 0 0 0 Total # of neighbors = 820000 Ave neighs/atom = 410 Neighbor list builds = 0 Dangerous builds = 0 if "${V_metal}>${V0_metal_times1000}" then "jump SELF unstable" if "${T}>${T_low} && ${T}<${T_up} && ${P}>${P_low} && ${P}<${P_up}" then "jump SELF break" print "flag: Temp = ${T}, Press = ${P}" flag: Temp = 290.194090341185, Press = 3.27871535034354 next a jump SELF top variable a loop 2000 run 1000 Generated 0 of 0 mixed pair_coeff terms from geometric mixing rule Neighbor list info ... update: every = 1 steps, delay = 0 steps, check = yes max neighbors/atom: 2000, page size: 100000 master list distance cutoff = 11.54372 ghost atom cutoff = 11.54372 binsize = 5.77186, bins = 6 6 6 1 neighbor lists, perpetual/occasional/extra = 1 0 0 (1) pair kim, perpetual attributes: full, newton off pair build: full/bin/atomonly stencil: full/bin/3d bin: standard Per MPI rank memory allocation (min/avg/max) = 6.664 | 6.664 | 6.664 Mbytes Step TotEng v_etotal_metal PotEng v_pe_metal Temp v_T_metal Volume v_V_metal Press v_P_metal 1000 -13356.044 -13356.044 -13429.751 -13429.751 285.25238 285.25238 31163.477 31163.477 -1658.1059 -1658.1059 2000 -13356.755 -13356.755 -13432.576 -13432.576 293.43484 293.43484 31145.13 31145.13 307.54494 307.54494 Loop time of 11.5444 on 1 procs for 1000 steps with 2000 atoms Performance: 7.484 ns/day, 3.207 hours/ns, 86.622 timesteps/s, 173.245 katom-step/s 100.0% CPU use with 1 MPI tasks x 1 OpenMP threads MPI task timing breakdown: Section | min time | avg time | max time |%varavg| %total --------------------------------------------------------------- Pair | 11.44 | 11.44 | 11.44 | 0.0 | 99.10 Neigh | 0 | 0 | 0 | 0.0 | 0.00 Comm | 0.030229 | 0.030229 | 0.030229 | 0.0 | 0.26 Output | 6.1736e-05 | 6.1736e-05 | 6.1736e-05 | 0.0 | 0.00 Modify | 0.065305 | 0.065305 | 0.065305 | 0.0 | 0.57 Other | | 0.008666 | | | 0.08 Nlocal: 2000 ave 2000 max 2000 min Histogram: 1 0 0 0 0 0 0 0 0 0 Nghost: 8745 ave 8745 max 8745 min Histogram: 1 0 0 0 0 0 0 0 0 0 Neighs: 0 ave 0 max 0 min Histogram: 1 0 0 0 0 0 0 0 0 0 FullNghs: 814088 ave 814088 max 814088 min Histogram: 1 0 0 0 0 0 0 0 0 0 Total # of neighbors = 814088 Ave neighs/atom = 407.044 Neighbor list builds = 0 Dangerous builds = 0 if "${V_metal}>${V0_metal_times1000}" then "jump SELF unstable" if "${T}>${T_low} && ${T}<${T_up} && ${P}>${P_low} && ${P}<${P_up}" then "jump SELF break" print "flag: Temp = ${T}, Press = ${P}" flag: Temp = 292.705867162659, Press = 6.52142586521736 next a jump SELF top variable a loop 2000 run 1000 Generated 0 of 0 mixed pair_coeff terms from geometric mixing rule Neighbor list info ... update: every = 1 steps, delay = 0 steps, check = yes max neighbors/atom: 2000, page size: 100000 master list distance cutoff = 11.54372 ghost atom cutoff = 11.54372 binsize = 5.77186, bins = 6 6 6 1 neighbor lists, perpetual/occasional/extra = 1 0 0 (1) pair kim, perpetual attributes: full, newton off pair build: full/bin/atomonly stencil: full/bin/3d bin: standard Per MPI rank memory allocation (min/avg/max) = 6.664 | 6.664 | 6.664 Mbytes Step TotEng v_etotal_metal PotEng v_pe_metal Temp v_T_metal Volume v_V_metal Press v_P_metal 2000 -13356.755 -13356.755 -13432.576 -13432.576 293.43484 293.43484 31145.13 31145.13 307.54494 307.54494 3000 -13369.627 -13369.627 -13446.34 -13446.34 296.88833 296.88833 31110.283 31110.283 4374.6874 4374.6874 Loop time of 11.5021 on 1 procs for 1000 steps with 2000 atoms Performance: 7.512 ns/day, 3.195 hours/ns, 86.941 timesteps/s, 173.881 katom-step/s 99.9% CPU use with 1 MPI tasks x 1 OpenMP threads MPI task timing breakdown: Section | min time | avg time | max time |%varavg| %total --------------------------------------------------------------- Pair | 11.399 | 11.399 | 11.399 | 0.0 | 99.10 Neigh | 0 | 0 | 0 | 0.0 | 0.00 Comm | 0.030456 | 0.030456 | 0.030456 | 0.0 | 0.26 Output | 9.1331e-05 | 9.1331e-05 | 9.1331e-05 | 0.0 | 0.00 Modify | 0.064306 | 0.064306 | 0.064306 | 0.0 | 0.56 Other | | 0.008367 | | | 0.07 Nlocal: 2000 ave 2000 max 2000 min Histogram: 1 0 0 0 0 0 0 0 0 0 Nghost: 8745 ave 8745 max 8745 min Histogram: 1 0 0 0 0 0 0 0 0 0 Neighs: 0 ave 0 max 0 min Histogram: 1 0 0 0 0 0 0 0 0 0 FullNghs: 814068 ave 814068 max 814068 min Histogram: 1 0 0 0 0 0 0 0 0 0 Total # of neighbors = 814068 Ave neighs/atom = 407.034 Neighbor list builds = 0 Dangerous builds = 0 if "${V_metal}>${V0_metal_times1000}" then "jump SELF unstable" if "${T}>${T_low} && ${T}<${T_up} && ${P}>${P_low} && ${P}<${P_up}" then "jump SELF break" print "flag: Temp = ${T}, Press = ${P}" flag: Temp = 292.92906841386, Press = 7.37144458497789 next a jump SELF top variable a loop 2000 run 1000 Generated 0 of 0 mixed pair_coeff terms from geometric mixing rule Neighbor list info ... update: every = 1 steps, delay = 0 steps, check = yes max neighbors/atom: 2000, page size: 100000 master list distance cutoff = 11.54372 ghost atom cutoff = 11.54372 binsize = 5.77186, bins = 6 6 6 1 neighbor lists, perpetual/occasional/extra = 1 0 0 (1) pair kim, perpetual attributes: full, newton off pair build: full/bin/atomonly stencil: full/bin/3d bin: standard Per MPI rank memory allocation (min/avg/max) = 6.663 | 6.663 | 6.663 Mbytes Step TotEng v_etotal_metal PotEng v_pe_metal Temp v_T_metal Volume v_V_metal Press v_P_metal 3000 -13369.627 -13369.627 -13446.34 -13446.34 296.88833 296.88833 31110.283 31110.283 4374.6874 4374.6874 4000 -13378.708 -13378.708 -13455.122 -13455.122 295.72983 295.72983 31211.2 31211.2 -1885.7764 -1885.7764 Loop time of 10.7159 on 1 procs for 1000 steps with 2000 atoms Performance: 8.063 ns/day, 2.977 hours/ns, 93.320 timesteps/s, 186.639 katom-step/s 100.0% CPU use with 1 MPI tasks x 1 OpenMP threads MPI task timing breakdown: Section | min time | avg time | max time |%varavg| %total --------------------------------------------------------------- Pair | 10.584 | 10.584 | 10.584 | 0.0 | 98.77 Neigh | 0.036346 | 0.036346 | 0.036346 | 0.0 | 0.34 Comm | 0.028229 | 0.028229 | 0.028229 | 0.0 | 0.26 Output | 3.7299e-05 | 3.7299e-05 | 3.7299e-05 | 0.0 | 0.00 Modify | 0.060041 | 0.060041 | 0.060041 | 0.0 | 0.56 Other | | 0.007574 | | | 0.07 Nlocal: 2000 ave 2000 max 2000 min Histogram: 1 0 0 0 0 0 0 0 0 0 Nghost: 8444 ave 8444 max 8444 min Histogram: 1 0 0 0 0 0 0 0 0 0 Neighs: 0 ave 0 max 0 min Histogram: 1 0 0 0 0 0 0 0 0 0 FullNghs: 817944 ave 817944 max 817944 min Histogram: 1 0 0 0 0 0 0 0 0 0 Total # of neighbors = 817944 Ave neighs/atom = 408.972 Neighbor list builds = 2 Dangerous builds = 0 if "${V_metal}>${V0_metal_times1000}" then "jump SELF unstable" if "${T}>${T_low} && ${T}<${T_up} && ${P}>${P_low} && ${P}<${P_up}" then "jump SELF break" jump SELF break # Write final averaged volume to file if temperature and volume have converged; otherwise wirte a # flag to indicate non-convergence. variable myStep equal step if "${myStep} < 2000000" then "print '${V}' file output/vol_T293.15.out" else "print 'not_converged' file output/vol_T293.15.out" print '${V}' file output/vol_T293.15.out 31156.967651782 print "LAMMPS calculation completed" LAMMPS calculation completed quit 0