# 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 ${latticeconst_converted} lattice bcc 3.30244355648756 Lattice spacing in x,y,z = 3.3024436 3.3024436 3.3024436 region simbox block 0 10 0 10 0 10 units lattice create_box 1 simbox Created orthogonal box = (0 0 0) to (33.024436 33.024436 33.024436) 1 by 1 by 1 MPI processor grid create_atoms 1 box Created 2000 atoms using lattice units in orthogonal box = (0 0 0) to (33.024436 33.024436 33.024436) create_atoms CPU = 0.000 seconds variable mass_converted equal 55.845*${_u_mass} variable mass_converted equal 55.845*1 kim interactions Fe #=== BEGIN kim interactions ================================== pair_style kim MEAM_LAMMPS_KimJungLee_2010_FeNbC__MO_072689718616_002 pair_coeff * * Fe #=== END kim interactions ==================================== mass 1 ${mass_converted} mass 1 55.845 # 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 ${timestep_converted} timestep 0.001 variable temp_converted equal 273.15*${_u_temperature} variable temp_converted equal 273.15*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 273.15 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 273.15 ${temp_converted} ${Tdamp_converted} iso ${press_converted} ${press_converted} ${Pdamp_converted} fix ensemble all npt temp 273.15 273.15 ${Tdamp_converted} iso ${press_converted} ${press_converted} ${Pdamp_converted} fix ensemble all npt temp 273.15 273.15 0.01 iso ${press_converted} ${press_converted} ${Pdamp_converted} fix ensemble all npt temp 273.15 273.15 0.01 iso 0 ${press_converted} ${Pdamp_converted} fix ensemble all npt temp 273.15 273.15 0.01 iso 0 0 ${Pdamp_converted} fix ensemble all npt temp 273.15 273.15 0.01 iso 0 0 0.1 # compute the time averages of pressure, temperature, and volume, respectively # ignore the first 5000 timesteps variable etotal_metal equal etotal/${_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 "273.15 - 1.0" variable T_up equal "273.15 + 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_072689718616_002#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 = 6.6 ghost atom cutoff = 6.6 binsize = 3.3, 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 -14869.42 -14869.42 -14940 -14940 273.15 273.15 36016.89 36016.89 2093.1295 2093.1295 1000 -14803.844 -14803.844 -14874.569 -14874.569 273.71589 273.71589 36108.361 36108.361 3287.737 3287.737 Loop time of 13.0331 on 1 procs for 1000 steps with 2000 atoms Performance: 6.629 ns/day, 3.620 hours/ns, 76.728 timesteps/s, 153.455 katom-step/s 99.5% CPU use with 1 MPI tasks x 1 OpenMP threads MPI task timing breakdown: Section | min time | avg time | max time |%varavg| %total --------------------------------------------------------------- Pair | 12.956 | 12.956 | 12.956 | 0.0 | 99.41 Neigh | 0 | 0 | 0 | 0.0 | 0.00 Comm | 0.011212 | 0.011212 | 0.011212 | 0.0 | 0.09 Output | 6.7998e-05 | 6.7998e-05 | 6.7998e-05 | 0.0 | 0.00 Modify | 0.061051 | 0.061051 | 0.061051 | 0.0 | 0.47 Other | | 0.005046 | | | 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: 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 = ${P}" flag: Temp = 274.996827579541, Press = 147.144411873515 next a jump SELF top variable a loop 2000 run 1000 Generated 0 of 0 mixed pair_coeff terms from geometric mixing rule Neighbor list info ... update: every = 1 steps, delay = 0 steps, check = yes max neighbors/atom: 2000, page size: 100000 master list distance cutoff = 6.6 ghost atom cutoff = 6.6 binsize = 3.3, bins = 11 11 11 1 neighbor lists, perpetual/occasional/extra = 1 0 0 (1) pair kim, perpetual attributes: full, newton off pair build: full/bin/atomonly stencil: full/bin/3d bin: standard Per MPI rank memory allocation (min/avg/max) = 3.704 | 3.704 | 3.704 Mbytes Step TotEng v_etotal_metal PotEng v_pe_metal Temp v_T_metal Volume v_V_metal Press v_P_metal 1000 -14803.844 -14803.844 -14874.569 -14874.569 273.71589 273.71589 36108.361 36108.361 3287.737 3287.737 2000 -14792.861 -14792.861 -14864.977 -14864.977 279.09816 279.09816 36127.326 36127.326 3231.6609 3231.6609 Loop time of 23.2847 on 1 procs for 1000 steps with 2000 atoms Performance: 3.711 ns/day, 6.468 hours/ns, 42.947 timesteps/s, 85.893 katom-step/s 99.6% CPU use with 1 MPI tasks x 1 OpenMP threads MPI task timing breakdown: Section | min time | avg time | max time |%varavg| %total --------------------------------------------------------------- Pair | 23.205 | 23.205 | 23.205 | 0.0 | 99.66 Neigh | 0 | 0 | 0 | 0.0 | 0.00 Comm | 0.012633 | 0.012633 | 0.012633 | 0.0 | 0.05 Output | 4.0516e-05 | 4.0516e-05 | 4.0516e-05 | 0.0 | 0.00 Modify | 0.062245 | 0.062245 | 0.062245 | 0.0 | 0.27 Other | | 0.005081 | | | 0.02 Nlocal: 2000 ave 2000 max 2000 min Histogram: 1 0 0 0 0 0 0 0 0 0 Nghost: 3384 ave 3384 max 3384 min Histogram: 1 0 0 0 0 0 0 0 0 0 Neighs: 0 ave 0 max 0 min Histogram: 1 0 0 0 0 0 0 0 0 0 FullNghs: 121332 ave 121332 max 121332 min Histogram: 1 0 0 0 0 0 0 0 0 0 Total # of neighbors = 121332 Ave neighs/atom = 60.666 Neighbor list builds = 0 Dangerous builds = 0 if "${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 = ${P}" flag: Temp = 272.779903471539, Press = 13.8117657513954 next a jump SELF top variable a loop 2000 run 1000 Generated 0 of 0 mixed pair_coeff terms from geometric mixing rule Neighbor list info ... update: every = 1 steps, delay = 0 steps, check = yes max neighbors/atom: 2000, page size: 100000 master list distance cutoff = 6.6 ghost atom cutoff = 6.6 binsize = 3.3, bins = 11 11 11 1 neighbor lists, perpetual/occasional/extra = 1 0 0 (1) pair kim, perpetual attributes: full, newton off pair build: full/bin/atomonly stencil: full/bin/3d bin: standard Per MPI rank memory allocation (min/avg/max) = 3.704 | 3.704 | 3.704 Mbytes Step TotEng v_etotal_metal PotEng v_pe_metal Temp v_T_metal Volume v_V_metal Press v_P_metal 2000 -14792.861 -14792.861 -14864.977 -14864.977 279.09816 279.09816 36127.326 36127.326 3231.6609 3231.6609 3000 -14801.068 -14801.068 -14869.843 -14869.843 266.16488 266.16488 36144.594 36144.594 1684.9863 1684.9863 Loop time of 23.3022 on 1 procs for 1000 steps with 2000 atoms Performance: 3.708 ns/day, 6.473 hours/ns, 42.914 timesteps/s, 85.829 katom-step/s 99.6% CPU use with 1 MPI tasks x 1 OpenMP threads MPI task timing breakdown: Section | min time | avg time | max time |%varavg| %total --------------------------------------------------------------- Pair | 23.223 | 23.223 | 23.223 | 0.0 | 99.66 Neigh | 0 | 0 | 0 | 0.0 | 0.00 Comm | 0.012575 | 0.012575 | 0.012575 | 0.0 | 0.05 Output | 3.8793e-05 | 3.8793e-05 | 3.8793e-05 | 0.0 | 0.00 Modify | 0.061901 | 0.061901 | 0.061901 | 0.0 | 0.27 Other | | 0.005037 | | | 0.02 Nlocal: 2000 ave 2000 max 2000 min Histogram: 1 0 0 0 0 0 0 0 0 0 Nghost: 3386 ave 3386 max 3386 min Histogram: 1 0 0 0 0 0 0 0 0 0 Neighs: 0 ave 0 max 0 min Histogram: 1 0 0 0 0 0 0 0 0 0 FullNghs: 121296 ave 121296 max 121296 min Histogram: 1 0 0 0 0 0 0 0 0 0 Total # of neighbors = 121296 Ave neighs/atom = 60.648 Neighbor list builds = 0 Dangerous builds = 0 if "${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 = ${P}" flag: Temp = 272.910004931219, Press = 5.72827160841537 next a jump SELF top variable a loop 2000 run 1000 Generated 0 of 0 mixed pair_coeff terms from geometric mixing rule Neighbor list info ... update: every = 1 steps, delay = 0 steps, check = yes max neighbors/atom: 2000, page size: 100000 master list distance cutoff = 6.6 ghost atom cutoff = 6.6 binsize = 3.3, bins = 11 11 11 1 neighbor lists, perpetual/occasional/extra = 1 0 0 (1) pair kim, perpetual attributes: full, newton off pair build: full/bin/atomonly stencil: full/bin/3d bin: standard Per MPI rank memory allocation (min/avg/max) = 3.704 | 3.704 | 3.704 Mbytes Step TotEng v_etotal_metal PotEng v_pe_metal Temp v_T_metal Volume v_V_metal Press v_P_metal 3000 -14801.068 -14801.068 -14869.843 -14869.843 266.16488 266.16488 36144.594 36144.594 1684.9863 1684.9863 4000 -14799.999 -14799.999 -14870.826 -14870.826 274.10827 274.10827 36157.393 36157.393 1000.7209 1000.7209 Loop time of 23.3113 on 1 procs for 1000 steps with 2000 atoms Performance: 3.706 ns/day, 6.475 hours/ns, 42.898 timesteps/s, 85.795 katom-step/s 99.6% CPU use with 1 MPI tasks x 1 OpenMP threads MPI task timing breakdown: Section | min time | avg time | max time |%varavg| %total --------------------------------------------------------------- Pair | 23.231 | 23.231 | 23.231 | 0.0 | 99.66 Neigh | 0 | 0 | 0 | 0.0 | 0.00 Comm | 0.012591 | 0.012591 | 0.012591 | 0.0 | 0.05 Output | 3.8963e-05 | 3.8963e-05 | 3.8963e-05 | 0.0 | 0.00 Modify | 0.062253 | 0.062253 | 0.062253 | 0.0 | 0.27 Other | | 0.005347 | | | 0.02 Nlocal: 2000 ave 2000 max 2000 min Histogram: 1 0 0 0 0 0 0 0 0 0 Nghost: 3375 ave 3375 max 3375 min Histogram: 1 0 0 0 0 0 0 0 0 0 Neighs: 0 ave 0 max 0 min Histogram: 1 0 0 0 0 0 0 0 0 0 FullNghs: 121252 ave 121252 max 121252 min Histogram: 1 0 0 0 0 0 0 0 0 0 Total # of neighbors = 121252 Ave neighs/atom = 60.626 Neighbor list builds = 0 Dangerous builds = 0 if "${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_T273.15.out" else "print 'not_converged' file output/vol_T273.15.out" print '${V}' file output/vol_T273.15.out 36180.0654225626 print "LAMMPS calculation completed" LAMMPS calculation completed quit 0