# 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 ${neigh_skin} bin neighbor 2 bin # create a supercell with cubic lattice (fcc, bcc, sc, or diamond) # using 10*10*10 conventional (orthogonal) unit cells variable latticeconst_converted equal 3.302443556487561*${_u_distance} variable latticeconst_converted equal 3.302443556487561*1 lattice bcc ${latticeconst_converted} lattice bcc 3.30244355648756 Lattice spacing in x,y,z = 3.3024436 3.3024436 3.3024436 region simbox block 0 10 0 10 0 10 units lattice create_box 1 simbox Created orthogonal box = (0 0 0) to (33.024436 33.024436 33.024436) 1 by 1 by 1 MPI processor grid create_atoms 1 box Created 2000 atoms using lattice units in orthogonal box = (0 0 0) to (33.024436 33.024436 33.024436) create_atoms CPU = 0.000 seconds variable mass_converted equal 180.9479*${_u_mass} variable mass_converted equal 180.9479*1 kim interactions Ta #=== BEGIN kim interactions ================================== pair_style kim MEAM_LAMMPS_LeeBaskesKim_2001_Ta__MO_644143102837_001 pair_coeff * * Ta #=== END kim interactions ==================================== mass 1 ${mass_converted} mass 1 180.9479 # initial volume variable v equal vol # assign formula variable V0 equal ${v} # evaluate initial value variable V0 equal 36016.8901176252 variable V0_metal equal ${V0}/(${_u_distance}*${_u_distance}*${_u_distance}) variable V0_metal equal 36016.8901176252/(${_u_distance}*${_u_distance}*${_u_distance}) variable V0_metal equal 36016.8901176252/(1*${_u_distance}*${_u_distance}) variable V0_metal equal 36016.8901176252/(1*1*${_u_distance}) variable V0_metal equal 36016.8901176252/(1*1*1) variable V0_metal_times1000 equal ${V0_metal}*1000 variable V0_metal_times1000 equal 36016.8901176252*1000 print "Initial system volume: ${V0_metal} Angstroms^3" Initial system volume: 36016.8901176252 Angstroms^3 # set the time step to 0.001 picoseconds variable timestep_converted equal 0.001*${_u_time} variable timestep_converted equal 0.001*1 timestep ${timestep_converted} timestep 0.001 variable temp_converted equal 253.15*${_u_temperature} variable temp_converted equal 253.15*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 253.15 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 253.15 ${temp_converted} ${Tdamp_converted} iso ${press_converted} ${press_converted} ${Pdamp_converted} fix ensemble all npt temp 253.15 253.15 ${Tdamp_converted} iso ${press_converted} ${press_converted} ${Pdamp_converted} fix ensemble all npt temp 253.15 253.15 0.01 iso ${press_converted} ${press_converted} ${Pdamp_converted} fix ensemble all npt temp 253.15 253.15 0.01 iso 0 ${press_converted} ${Pdamp_converted} fix ensemble all npt temp 253.15 253.15 0.01 iso 0 0 ${Pdamp_converted} fix ensemble all npt temp 253.15 253.15 0.01 iso 0 0 0.1 # compute the time averages of pressure, temperature, and volume, respectively # ignore the first 5000 timesteps variable etotal_metal equal etotal/${_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 "253.15 - 1.0" variable T_up equal "253.15 + 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_644143102837_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 = 6 ghost atom cutoff = 6 binsize = 3, bins = 12 12 12 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) = 3.704 | 3.704 | 3.704 Mbytes Step TotEng v_etotal_metal PotEng v_pe_metal Temp v_T_metal Volume v_V_metal Press v_P_metal 0 -16114.588 -16114.588 -16180 -16180 253.15 253.15 36016.89 36016.89 1939.8334 1939.8334 1000 -16044.676 -16044.676 -16109.055 -16109.055 249.15605 249.15605 36128.028 36128.028 1678.79 1678.79 Loop time of 12.1956 on 1 procs for 1000 steps with 2000 atoms Performance: 7.085 ns/day, 3.388 hours/ns, 81.997 timesteps/s, 163.993 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 | 12.113 | 12.113 | 12.113 | 0.0 | 99.32 Neigh | 0 | 0 | 0 | 0.0 | 0.00 Comm | 0.012174 | 0.012174 | 0.012174 | 0.0 | 0.10 Output | 0.00010858 | 0.00010858 | 0.00010858 | 0.0 | 0.00 Modify | 0.065164 | 0.065164 | 0.065164 | 0.0 | 0.53 Other | | 0.005635 | | | 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 = ${P}" flag: Temp = 252.349900943076, Press = -37.3770774944213 next a jump SELF top variable a loop 2000 run 1000 Generated 0 of 0 mixed pair_coeff terms from geometric mixing rule Neighbor list info ... update: every = 1 steps, delay = 0 steps, check = yes max neighbors/atom: 2000, page size: 100000 master list distance cutoff = 6 ghost atom cutoff = 6 binsize = 3, bins = 12 12 12 1 neighbor lists, perpetual/occasional/extra = 1 0 0 (1) pair kim, perpetual attributes: full, newton off pair build: full/bin/atomonly stencil: full/bin/3d bin: standard Per MPI rank memory allocation (min/avg/max) = 3.704 | 3.704 | 3.704 Mbytes Step TotEng v_etotal_metal PotEng v_pe_metal Temp v_T_metal Volume v_V_metal Press v_P_metal 1000 -16044.676 -16044.676 -16109.055 -16109.055 249.15605 249.15605 36128.028 36128.028 1678.79 1678.79 2000 -16045.978 -16045.978 -16112.975 -16112.975 259.28489 259.28489 36146.48 36146.48 819.32349 819.32349 Loop time of 13.5603 on 1 procs for 1000 steps with 2000 atoms Performance: 6.372 ns/day, 3.767 hours/ns, 73.745 timesteps/s, 147.490 katom-step/s 100.0% CPU use with 1 MPI tasks x 1 OpenMP threads MPI task timing breakdown: Section | min time | avg time | max time |%varavg| %total --------------------------------------------------------------- Pair | 13.485 | 13.485 | 13.485 | 0.0 | 99.45 Neigh | 0 | 0 | 0 | 0.0 | 0.00 Comm | 0.010288 | 0.010288 | 0.010288 | 0.0 | 0.08 Output | 3.9404e-05 | 3.9404e-05 | 3.9404e-05 | 0.0 | 0.00 Modify | 0.059742 | 0.059742 | 0.059742 | 0.0 | 0.44 Other | | 0.004891 | | | 0.04 Nlocal: 2000 ave 2000 max 2000 min Histogram: 1 0 0 0 0 0 0 0 0 0 Nghost: 2941 ave 2941 max 2941 min Histogram: 1 0 0 0 0 0 0 0 0 0 Neighs: 0 ave 0 max 0 min Histogram: 1 0 0 0 0 0 0 0 0 0 FullNghs: 115982 ave 115982 max 115982 min Histogram: 1 0 0 0 0 0 0 0 0 0 Total # of neighbors = 115982 Ave neighs/atom = 57.991 Neighbor list builds = 0 Dangerous builds = 0 if "${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 = ${P}" flag: Temp = 252.992701940164, Press = -5.65093868007212 next a jump SELF top variable a loop 2000 run 1000 Generated 0 of 0 mixed pair_coeff terms from geometric mixing rule Neighbor list info ... update: every = 1 steps, delay = 0 steps, check = yes max neighbors/atom: 2000, page size: 100000 master list distance cutoff = 6 ghost atom cutoff = 6 binsize = 3, bins = 12 12 12 1 neighbor lists, perpetual/occasional/extra = 1 0 0 (1) pair kim, perpetual attributes: full, newton off pair build: full/bin/atomonly stencil: full/bin/3d bin: standard Per MPI rank memory allocation (min/avg/max) = 3.704 | 3.704 | 3.704 Mbytes Step TotEng v_etotal_metal PotEng v_pe_metal Temp v_T_metal Volume v_V_metal Press v_P_metal 2000 -16045.978 -16045.978 -16112.975 -16112.975 259.28489 259.28489 36146.48 36146.48 819.32349 819.32349 3000 -16049.75 -16049.75 -16115.27 -16115.27 253.56988 253.56988 36172.474 36172.474 -923.98603 -923.98603 Loop time of 13.4057 on 1 procs for 1000 steps with 2000 atoms Performance: 6.445 ns/day, 3.724 hours/ns, 74.595 timesteps/s, 149.190 katom-step/s 100.0% CPU use with 1 MPI tasks x 1 OpenMP threads MPI task timing breakdown: Section | min time | avg time | max time |%varavg| %total --------------------------------------------------------------- Pair | 13.331 | 13.331 | 13.331 | 0.0 | 99.44 Neigh | 0 | 0 | 0 | 0.0 | 0.00 Comm | 0.010437 | 0.010437 | 0.010437 | 0.0 | 0.08 Output | 4.0767e-05 | 4.0767e-05 | 4.0767e-05 | 0.0 | 0.00 Modify | 0.059623 | 0.059623 | 0.059623 | 0.0 | 0.44 Other | | 0.004747 | | | 0.04 Nlocal: 2000 ave 2000 max 2000 min Histogram: 1 0 0 0 0 0 0 0 0 0 Nghost: 2941 ave 2941 max 2941 min Histogram: 1 0 0 0 0 0 0 0 0 0 Neighs: 0 ave 0 max 0 min Histogram: 1 0 0 0 0 0 0 0 0 0 FullNghs: 115982 ave 115982 max 115982 min Histogram: 1 0 0 0 0 0 0 0 0 0 Total # of neighbors = 115982 Ave neighs/atom = 57.991 Neighbor list builds = 0 Dangerous builds = 0 if "${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 = ${P}" flag: Temp = 253.06595106042, Press = -5.01447690132028 next a jump SELF top variable a loop 2000 run 1000 Generated 0 of 0 mixed pair_coeff terms from geometric mixing rule Neighbor list info ... update: every = 1 steps, delay = 0 steps, check = yes max neighbors/atom: 2000, page size: 100000 master list distance cutoff = 6 ghost atom cutoff = 6 binsize = 3, bins = 12 12 12 1 neighbor lists, perpetual/occasional/extra = 1 0 0 (1) pair kim, perpetual attributes: full, newton off pair build: full/bin/atomonly stencil: full/bin/3d bin: standard Per MPI rank memory allocation (min/avg/max) = 3.704 | 3.704 | 3.704 Mbytes Step TotEng v_etotal_metal PotEng v_pe_metal Temp v_T_metal Volume v_V_metal Press v_P_metal 3000 -16049.75 -16049.75 -16115.27 -16115.27 253.56988 253.56988 36172.474 36172.474 -923.98603 -923.98603 4000 -16036.307 -16036.307 -16099.989 -16099.989 246.45561 246.45561 36221.722 36221.722 -2159.3839 -2159.3839 Loop time of 13.5841 on 1 procs for 1000 steps with 2000 atoms Performance: 6.360 ns/day, 3.773 hours/ns, 73.615 timesteps/s, 147.231 katom-step/s 100.0% CPU use with 1 MPI tasks x 1 OpenMP threads MPI task timing breakdown: Section | min time | avg time | max time |%varavg| %total --------------------------------------------------------------- Pair | 13.509 | 13.509 | 13.509 | 0.0 | 99.45 Neigh | 0 | 0 | 0 | 0.0 | 0.00 Comm | 0.010458 | 0.010458 | 0.010458 | 0.0 | 0.08 Output | 5.2879e-05 | 5.2879e-05 | 5.2879e-05 | 0.0 | 0.00 Modify | 0.059675 | 0.059675 | 0.059675 | 0.0 | 0.44 Other | | 0.004799 | | | 0.04 Nlocal: 2000 ave 2000 max 2000 min Histogram: 1 0 0 0 0 0 0 0 0 0 Nghost: 2941 ave 2941 max 2941 min Histogram: 1 0 0 0 0 0 0 0 0 0 Neighs: 0 ave 0 max 0 min Histogram: 1 0 0 0 0 0 0 0 0 0 FullNghs: 115986 ave 115986 max 115986 min Histogram: 1 0 0 0 0 0 0 0 0 0 Total # of neighbors = 115986 Ave neighs/atom = 57.993 Neighbor list builds = 0 Dangerous builds = 0 if "${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_T253.15.out" else "print 'not_converged' file output/vol_T253.15.out" print '${V}' file output/vol_T253.15.out 36160.5767012113 print "LAMMPS calculation completed" LAMMPS calculation completed quit 0