# 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 ${neigh_skin} bin neighbor 2 bin # create a supercell with cubic lattice (fcc, bcc, sc, or diamond) # using 10*10*10 conventional (orthogonal) unit cells variable latticeconst_converted equal 3.1638794839382167*${_u_distance} variable latticeconst_converted equal 3.1638794839382167*1 lattice bcc ${latticeconst_converted} lattice bcc 3.16387948393822 Lattice spacing in x,y,z = 3.1638795 3.1638795 3.1638795 region simbox block 0 10 0 10 0 10 units lattice create_box 1 simbox Created orthogonal box = (0 0 0) to (31.638795 31.638795 31.638795) 1 by 1 by 1 MPI processor grid create_atoms 1 box Created 2000 atoms using lattice units in orthogonal box = (0 0 0) to (31.638795 31.638795 31.638795) create_atoms CPU = 0.000 seconds variable mass_converted equal 183.84*${_u_mass} variable mass_converted equal 183.84*1 kim interactions W #=== BEGIN kim interactions ================================== pair_style kim MEAM_LAMMPS_LeeBaskesKim_2001_W__MO_227263111062_001 pair_coeff * * W #=== END kim interactions ==================================== mass 1 ${mass_converted} mass 1 183.84 # initial volume variable v equal vol # assign formula variable V0 equal ${v} # evaluate initial value variable V0 equal 31670.8556605788 variable V0_metal equal ${V0}/(${_u_distance}*${_u_distance}*${_u_distance}) variable V0_metal equal 31670.8556605788/(${_u_distance}*${_u_distance}*${_u_distance}) variable V0_metal equal 31670.8556605788/(1*${_u_distance}*${_u_distance}) variable V0_metal equal 31670.8556605788/(1*1*${_u_distance}) variable V0_metal equal 31670.8556605788/(1*1*1) variable V0_metal_times1000 equal ${V0_metal}*1000 variable V0_metal_times1000 equal 31670.8556605788*1000 print "Initial system volume: ${V0_metal} Angstroms^3" Initial system volume: 31670.8556605788 Angstroms^3 # set the time step to 0.001 picoseconds variable timestep_converted equal 0.001*${_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_227263111062_001#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 = 5.8 ghost atom cutoff = 5.8 binsize = 2.9, bins = 11 11 11 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) = 3.701 | 3.701 | 3.701 Mbytes Step TotEng v_etotal_metal PotEng v_pe_metal Temp v_T_metal Volume v_V_metal Press v_P_metal 0 -17244.253 -17244.253 -17320 -17320 293.15 293.15 31670.856 31670.856 2554.595 2554.595 1000 -17162.205 -17162.205 -17235.474 -17235.474 283.5573 283.5573 31784.883 31784.883 513.58637 513.58637 Loop time of 12.4091 on 1 procs for 1000 steps with 2000 atoms Performance: 6.963 ns/day, 3.447 hours/ns, 80.586 timesteps/s, 161.172 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 | 12.325 | 12.325 | 12.325 | 0.0 | 99.32 Neigh | 0 | 0 | 0 | 0.0 | 0.00 Comm | 0.011795 | 0.011795 | 0.011795 | 0.0 | 0.10 Output | 0.00010557 | 0.00010557 | 0.00010557 | 0.0 | 0.00 Modify | 0.066135 | 0.066135 | 0.066135 | 0.0 | 0.53 Other | | 0.005833 | | | 0.05 Nlocal: 2000 ave 2000 max 2000 min Histogram: 1 0 0 0 0 0 0 0 0 0 Nghost: 2941 ave 2941 max 2941 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: 116000 ave 116000 max 116000 min Histogram: 1 0 0 0 0 0 0 0 0 0 Total # of neighbors = 116000 Ave neighs/atom = 58 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 = ${P}" flag: Temp = 292.771922365123, Press = -56.9407736340493 next a jump SELF top variable a loop 2000 run 1000 Generated 0 of 0 mixed pair_coeff terms from geometric mixing rule Neighbor list info ... update: every = 1 steps, delay = 0 steps, check = yes max neighbors/atom: 2000, page size: 100000 master list distance cutoff = 5.8 ghost atom cutoff = 5.8 binsize = 2.9, bins = 11 11 11 1 neighbor lists, perpetual/occasional/extra = 1 0 0 (1) pair kim, perpetual attributes: full, newton off pair build: full/bin/atomonly stencil: full/bin/3d bin: standard Per MPI rank memory allocation (min/avg/max) = 3.701 | 3.701 | 3.701 Mbytes Step TotEng v_etotal_metal PotEng v_pe_metal Temp v_T_metal Volume v_V_metal Press v_P_metal 1000 -17162.205 -17162.205 -17235.474 -17235.474 283.5573 283.5573 31784.883 31784.883 513.58637 513.58637 2000 -17165.974 -17165.974 -17242.803 -17242.803 297.33519 297.33519 31815.752 31815.752 -2981.6398 -2981.6398 Loop time of 16.8533 on 1 procs for 1000 steps with 2000 atoms Performance: 5.127 ns/day, 4.681 hours/ns, 59.336 timesteps/s, 118.671 katom-step/s 100.0% CPU use with 1 MPI tasks x 1 OpenMP threads MPI task timing breakdown: Section | min time | avg time | max time |%varavg| %total --------------------------------------------------------------- Pair | 16.772 | 16.772 | 16.772 | 0.0 | 99.52 Neigh | 0 | 0 | 0 | 0.0 | 0.00 Comm | 0.011121 | 0.011121 | 0.011121 | 0.0 | 0.07 Output | 5.8389e-05 | 5.8389e-05 | 5.8389e-05 | 0.0 | 0.00 Modify | 0.064446 | 0.064446 | 0.064446 | 0.0 | 0.38 Other | | 0.00558 | | | 0.03 Nlocal: 2000 ave 2000 max 2000 min Histogram: 1 0 0 0 0 0 0 0 0 0 Nghost: 2941 ave 2941 max 2941 min Histogram: 1 0 0 0 0 0 0 0 0 0 Neighs: 0 ave 0 max 0 min Histogram: 1 0 0 0 0 0 0 0 0 0 FullNghs: 116000 ave 116000 max 116000 min Histogram: 1 0 0 0 0 0 0 0 0 0 Total # of neighbors = 116000 Ave neighs/atom = 58 Neighbor list builds = 0 Dangerous builds = 0 if "${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 = ${P}" flag: Temp = 293.019431755379, Press = -12.7008776763032 next a jump SELF top variable a loop 2000 run 1000 Generated 0 of 0 mixed pair_coeff terms from geometric mixing rule Neighbor list info ... update: every = 1 steps, delay = 0 steps, check = yes max neighbors/atom: 2000, page size: 100000 master list distance cutoff = 5.8 ghost atom cutoff = 5.8 binsize = 2.9, bins = 11 11 11 1 neighbor lists, perpetual/occasional/extra = 1 0 0 (1) pair kim, perpetual attributes: full, newton off pair build: full/bin/atomonly stencil: full/bin/3d bin: standard Per MPI rank memory allocation (min/avg/max) = 3.701 | 3.701 | 3.701 Mbytes Step TotEng v_etotal_metal PotEng v_pe_metal Temp v_T_metal Volume v_V_metal Press v_P_metal 2000 -17165.974 -17165.974 -17242.803 -17242.803 297.33519 297.33519 31815.752 31815.752 -2981.6398 -2981.6398 3000 -17167.139 -17167.139 -17241.961 -17241.961 289.57012 289.57012 31810.451 31810.451 -2458.9061 -2458.9061 Loop time of 16.4269 on 1 procs for 1000 steps with 2000 atoms Performance: 5.260 ns/day, 4.563 hours/ns, 60.876 timesteps/s, 121.751 katom-step/s 100.0% CPU use with 1 MPI tasks x 1 OpenMP threads MPI task timing breakdown: Section | min time | avg time | max time |%varavg| %total --------------------------------------------------------------- Pair | 16.35 | 16.35 | 16.35 | 0.0 | 99.53 Neigh | 0 | 0 | 0 | 0.0 | 0.00 Comm | 0.010359 | 0.010359 | 0.010359 | 0.0 | 0.06 Output | 4.9202e-05 | 4.9202e-05 | 4.9202e-05 | 0.0 | 0.00 Modify | 0.061449 | 0.061449 | 0.061449 | 0.0 | 0.37 Other | | 0.004776 | | | 0.03 Nlocal: 2000 ave 2000 max 2000 min Histogram: 1 0 0 0 0 0 0 0 0 0 Nghost: 2941 ave 2941 max 2941 min Histogram: 1 0 0 0 0 0 0 0 0 0 Neighs: 0 ave 0 max 0 min Histogram: 1 0 0 0 0 0 0 0 0 0 FullNghs: 116000 ave 116000 max 116000 min Histogram: 1 0 0 0 0 0 0 0 0 0 Total # of neighbors = 116000 Ave neighs/atom = 58 Neighbor list builds = 0 Dangerous builds = 0 if "${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 = ${P}" flag: Temp = 293.092341280097, Press = -5.83990056576858 next a jump SELF top variable a loop 2000 run 1000 Generated 0 of 0 mixed pair_coeff terms from geometric mixing rule Neighbor list info ... update: every = 1 steps, delay = 0 steps, check = yes max neighbors/atom: 2000, page size: 100000 master list distance cutoff = 5.8 ghost atom cutoff = 5.8 binsize = 2.9, bins = 11 11 11 1 neighbor lists, perpetual/occasional/extra = 1 0 0 (1) pair kim, perpetual attributes: full, newton off pair build: full/bin/atomonly stencil: full/bin/3d bin: standard Per MPI rank memory allocation (min/avg/max) = 3.701 | 3.701 | 3.701 Mbytes Step TotEng v_etotal_metal PotEng v_pe_metal Temp v_T_metal Volume v_V_metal Press v_P_metal 3000 -17167.139 -17167.139 -17241.961 -17241.961 289.57012 289.57012 31810.451 31810.451 -2458.9061 -2458.9061 4000 -17174.76 -17174.76 -17249.269 -17249.269 288.35796 288.35796 31769.898 31769.898 839.22513 839.22513 Loop time of 16.3997 on 1 procs for 1000 steps with 2000 atoms Performance: 5.268 ns/day, 4.555 hours/ns, 60.977 timesteps/s, 121.954 katom-step/s 100.0% CPU use with 1 MPI tasks x 1 OpenMP threads MPI task timing breakdown: Section | min time | avg time | max time |%varavg| %total --------------------------------------------------------------- Pair | 16.324 | 16.324 | 16.324 | 0.0 | 99.54 Neigh | 0 | 0 | 0 | 0.0 | 0.00 Comm | 0.010405 | 0.010405 | 0.010405 | 0.0 | 0.06 Output | 6.904e-05 | 6.904e-05 | 6.904e-05 | 0.0 | 0.00 Modify | 0.0606 | 0.0606 | 0.0606 | 0.0 | 0.37 Other | | 0.00466 | | | 0.03 Nlocal: 2000 ave 2000 max 2000 min Histogram: 1 0 0 0 0 0 0 0 0 0 Nghost: 2941 ave 2941 max 2941 min Histogram: 1 0 0 0 0 0 0 0 0 0 Neighs: 0 ave 0 max 0 min Histogram: 1 0 0 0 0 0 0 0 0 0 FullNghs: 116000 ave 116000 max 116000 min Histogram: 1 0 0 0 0 0 0 0 0 0 Total # of neighbors = 116000 Ave neighs/atom = 58 Neighbor list builds = 0 Dangerous builds = 0 if "${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" 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 31784.8281731193 print "LAMMPS calculation completed" LAMMPS calculation completed quit 0