# 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 ${neigh_skin} bin neighbor 2 bin # create a supercell with cubic lattice (fcc, bcc, sc, or diamond) # using 10*10*10 conventional (orthogonal) unit cells variable latticeconst_converted equal 5.576890356838703*${_u_distance} variable latticeconst_converted equal 5.576890356838703*1 lattice bcc ${latticeconst_converted} lattice bcc 5.5768903568387 Lattice spacing in x,y,z = 5.5768904 5.5768904 5.5768904 region simbox block 0 10 0 10 0 10 units lattice create_box 1 simbox Created orthogonal box = (0 0 0) to (55.768904 55.768904 55.768904) 1 by 1 by 1 MPI processor grid create_atoms 1 box Created 2000 atoms using lattice units in orthogonal box = (0 0 0) to (55.768904 55.768904 55.768904) create_atoms CPU = 0.000 seconds variable mass_converted equal 22.98977*${_u_mass} variable mass_converted equal 22.98977*1 kim interactions Na #=== BEGIN kim interactions ================================== variable kim_update equal 0 variable kim_periodic equal 1 pair_style reaxff NULL mincap 200 safezone 2 pair_coeff * * /tmp/kim-shared-library-parameter-file-directory-XXXXXXP2b75Q/ReaxFF_HOSiCeNaCl.txt Na WARNING: Van der Waals parameters for element SI indicate inner wall+shielding, but earlier atoms indicate a different van der Waals method. This may cause division-by-zero errors. Keeping van der Waals setting for earlier atoms. (src/REAXFF/reaxff_ffield.cpp:251) WARNING: Changed valency_val to valency_boc for X (src/REAXFF/reaxff_ffield.cpp:296) fix reaxqeq all qeq/reaxff 1 0.0 10.0 1.0e-6 reaxff #=== END kim interactions ==================================== mass 1 ${mass_converted} mass 1 22.98977 # initial volume variable v equal vol # assign formula variable V0 equal ${v} # evaluate initial value variable V0 equal 173450.804563749 variable V0_metal equal ${V0}/(${_u_distance}*${_u_distance}*${_u_distance}) variable V0_metal equal 173450.804563749/(${_u_distance}*${_u_distance}*${_u_distance}) variable V0_metal equal 173450.804563749/(1*${_u_distance}*${_u_distance}) variable V0_metal equal 173450.804563749/(1*1*${_u_distance}) variable V0_metal equal 173450.804563749/(1*1*1) variable V0_metal_times1000 equal ${V0_metal}*1000 variable V0_metal_times1000 equal 173450.804563749*1000 print "Initial system volume: ${V0_metal} Angstroms^3" Initial system volume: 173450.804563749 Angstroms^3 # set the time step to 0.001 picoseconds variable timestep_converted equal 0.001*${_u_time} variable timestep_converted equal 0.001*1000 timestep ${timestep_converted} timestep 1 variable temp_converted equal 253.15*${_u_temperature} variable temp_converted equal 253.15*1 variable Tdamp_converted equal 0.01*${_u_time} variable Tdamp_converted equal 0.01*1000 variable press_converted equal 0.0*${_u_pressure} variable press_converted equal 0.0*0.986923266716013 variable Pdamp_converted equal 0.1*${_u_time} variable Pdamp_converted equal 0.1*1000 # 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 10 iso ${press_converted} ${press_converted} ${Pdamp_converted} fix ensemble all npt temp 253.15 253.15 10 iso 0 ${press_converted} ${Pdamp_converted} fix ensemble all npt temp 253.15 253.15 10 iso 0 0 ${Pdamp_converted} fix ensemble all npt temp 253.15 253.15 10 iso 0 0 100 # compute the time averages of pressure, temperature, and volume, respectively # ignore the first 5000 timesteps variable etotal_metal equal etotal/${_u_energy} variable etotal_metal equal etotal/23.0605480120695 variable pe_metal equal pe/${_u_energy} variable pe_metal equal pe/23.0605480120695 variable T_metal equal temp/${_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/0.986923266716013 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/SM_282799919035_000#item-citation - pair reaxff command: doi:10.1016/j.parco.2011.08.005 @Article{Aktulga12, author = {H. M. Aktulga and J. C. Fogarty and S. A. Pandit and A. Y. Grama}, title = {Parallel Reactive Molecular Dynamics: {N}umerical Methods and Algorithmic Techniques}, journal = {Parallel Computing}, year = 2012, volume = 38, number = {4--5}, pages = {245--259} } - fix qeq/reaxff command: doi:10.1016/j.parco.2011.08.005 @Article{Aktulga12, author = {H. M. Aktulga and J. C. Fogarty and S. A. Pandit and A. Y. Grama}, title = {Parallel Reactive Molecular Dynamics: {N}umerical Methods and Algorithmic Techniques}, journal = {Parallel Computing}, year = 2012, volume = 38, pages = {245--259} } CITE-CITE-CITE-CITE-CITE-CITE-CITE-CITE-CITE-CITE-CITE-CITE-CITE Neighbor list info ... update: every = 1 steps, delay = 0 steps, check = yes max neighbors/atom: 4000, page size: 100000 master list distance cutoff = 12 ghost atom cutoff = 12 binsize = 6, bins = 10 10 10 2 neighbor lists, perpetual/occasional/extra = 2 0 0 (1) pair reaxff, perpetual attributes: half, newton off, ghost pair build: half/bin/newtoff/ghost stencil: full/ghost/bin/3d bin: standard (2) fix qeq/reaxff, perpetual, copy from (1) attributes: half, newton off pair build: copy stencil: none bin: none Per MPI rank memory allocation (min/avg/max) = 147.6 | 147.6 | 147.6 Mbytes Step TotEng v_etotal_metal PotEng v_pe_metal Temp v_T_metal Volume v_V_metal Press v_P_metal 0 3.5838148 0.15540892 -1504.8457 -65.256286 253.15 253.15 173450.8 173450.8 397.54066 402.80807 1000 1400.9154 60.749441 -92.494434 -4.0109382 250.62934 250.62934 1456763.5 1456763.5 42.878234 43.446371 Loop time of 6.64193 on 1 procs for 1000 steps with 2000 atoms Performance: 13.008 ns/day, 1.845 hours/ns, 150.559 timesteps/s, 301.117 katom-step/s 99.4% CPU use with 1 MPI tasks x 1 OpenMP threads MPI task timing breakdown: Section | min time | avg time | max time |%varavg| %total --------------------------------------------------------------- Pair | 4.785 | 4.785 | 4.785 | 0.0 | 72.04 Neigh | 0.55517 | 0.55517 | 0.55517 | 0.0 | 8.36 Comm | 0.01475 | 0.01475 | 0.01475 | 0.0 | 0.22 Output | 7.0983e-05 | 7.0983e-05 | 7.0983e-05 | 0.0 | 0.00 Modify | 1.2804 | 1.2804 | 1.2804 | 0.0 | 19.28 Other | | 0.006589 | | | 0.10 Nlocal: 2000 ave 2000 max 2000 min Histogram: 1 0 0 0 0 0 0 0 0 0 Nghost: 1538 ave 1538 max 1538 min Histogram: 1 0 0 0 0 0 0 0 0 0 Neighs: 10625 ave 10625 max 10625 min Histogram: 1 0 0 0 0 0 0 0 0 0 Total # of neighbors = 10625 Ave neighs/atom = 5.3125 Neighbor list builds = 96 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 = ${P}" flag: Temp = 251.162615813545, Press = 47.1911942013018 next a jump SELF top variable a loop 2000 run 1000 Per MPI rank memory allocation (min/avg/max) = 146.1 | 146.1 | 146.1 Mbytes Step TotEng v_etotal_metal PotEng v_pe_metal Temp v_T_metal Volume v_V_metal Press v_P_metal 1000 1400.9154 60.749441 -92.494434 -4.0109382 250.62934 250.62934 1456763.5 1456763.5 42.878234 43.446371 2000 1520.3562 65.928884 -16.437952 -0.71281705 257.91025 257.91025 11922129 11922129 5.8232209 5.9003786 Loop time of 1.44177 on 1 procs for 1000 steps with 2000 atoms Performance: 59.926 ns/day, 0.400 hours/ns, 693.593 timesteps/s, 1.387 Matom-step/s 99.5% CPU use with 1 MPI tasks x 1 OpenMP threads MPI task timing breakdown: Section | min time | avg time | max time |%varavg| %total --------------------------------------------------------------- Pair | 0.83337 | 0.83337 | 0.83337 | 0.0 | 57.80 Neigh | 0.28216 | 0.28216 | 0.28216 | 0.0 | 19.57 Comm | 0.010193 | 0.010193 | 0.010193 | 0.0 | 0.71 Output | 2.3334e-05 | 2.3334e-05 | 2.3334e-05 | 0.0 | 0.00 Modify | 0.30976 | 0.30976 | 0.30976 | 0.0 | 21.48 Other | | 0.006265 | | | 0.43 Nlocal: 2000 ave 2000 max 2000 min Histogram: 1 0 0 0 0 0 0 0 0 0 Nghost: 634 ave 634 max 634 min Histogram: 1 0 0 0 0 0 0 0 0 0 Neighs: 1327 ave 1327 max 1327 min Histogram: 1 0 0 0 0 0 0 0 0 0 Total # of neighbors = 1327 Ave neighs/atom = 0.6635 Neighbor list builds = 180 Dangerous builds = 0 if "${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 = ${P}" flag: Temp = 252.159095808916, Press = 21.3295802204612 next a jump SELF top variable a loop 2000 run 1000 Per MPI rank memory allocation (min/avg/max) = 146.3 | 146.3 | 146.3 Mbytes Step TotEng v_etotal_metal PotEng v_pe_metal Temp v_T_metal Volume v_V_metal Press v_P_metal 2000 1520.3562 65.928884 -16.437952 -0.71281705 257.91025 257.91025 11922129 11922129 5.8232209 5.9003786 3000 1513.3557 65.625315 -2.5573202 -0.1108959 254.40591 254.40591 91462348 91462348 0.75594105 0.76595726 Loop time of 0.868085 on 1 procs for 1000 steps with 2000 atoms Performance: 99.529 ns/day, 0.241 hours/ns, 1151.961 timesteps/s, 2.304 Matom-step/s 99.2% CPU use with 1 MPI tasks x 1 OpenMP threads MPI task timing breakdown: Section | min time | avg time | max time |%varavg| %total --------------------------------------------------------------- Pair | 0.37073 | 0.37073 | 0.37073 | 0.0 | 42.71 Neigh | 0.29243 | 0.29243 | 0.29243 | 0.0 | 33.69 Comm | 0.0092726 | 0.0092726 | 0.0092726 | 0.0 | 1.07 Output | 2.9245e-05 | 2.9245e-05 | 2.9245e-05 | 0.0 | 0.00 Modify | 0.18819 | 0.18819 | 0.18819 | 0.0 | 21.68 Other | | 0.007429 | | | 0.86 Nlocal: 2000 ave 2000 max 2000 min Histogram: 1 0 0 0 0 0 0 0 0 0 Nghost: 302 ave 302 max 302 min Histogram: 1 0 0 0 0 0 0 0 0 0 Neighs: 229 ave 229 max 229 min Histogram: 1 0 0 0 0 0 0 0 0 0 Total # of neighbors = 229 Ave neighs/atom = 0.1145 Neighbor list builds = 309 Dangerous builds = 0 if "${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 = ${P}" flag: Temp = 252.148119527032, Press = 12.3425754690217 next a jump SELF top variable a loop 2000 run 1000 Per MPI rank memory allocation (min/avg/max) = 148 | 148 | 148 Mbytes Step TotEng v_etotal_metal PotEng v_pe_metal Temp v_T_metal Volume v_V_metal Press v_P_metal 3000 1513.3557 65.625315 -2.5573202 -0.1108959 254.40591 254.40591 91462348 91462348 0.75594105 0.76595726 4000 1518.9534 65.868053 -0.20541401 -0.0089075944 254.95062 254.95062 6.5963292e+08 6.5963292e+08 0.10527151 0.10666635 Loop time of 1.30087 on 1 procs for 1000 steps with 2000 atoms Performance: 66.417 ns/day, 0.361 hours/ns, 768.719 timesteps/s, 1.537 Matom-step/s 96.4% CPU use with 1 MPI tasks x 1 OpenMP threads MPI task timing breakdown: Section | min time | avg time | max time |%varavg| %total --------------------------------------------------------------- Pair | 0.28954 | 0.28954 | 0.28954 | 0.0 | 22.26 Neigh | 0.82045 | 0.82045 | 0.82045 | 0.0 | 63.07 Comm | 0.015301 | 0.015301 | 0.015301 | 0.0 | 1.18 Output | 0.00010256 | 0.00010256 | 0.00010256 | 0.0 | 0.01 Modify | 0.16576 | 0.16576 | 0.16576 | 0.0 | 12.74 Other | | 0.009713 | | | 0.75 Nlocal: 2000 ave 2000 max 2000 min Histogram: 1 0 0 0 0 0 0 0 0 0 Nghost: 151 ave 151 max 151 min Histogram: 1 0 0 0 0 0 0 0 0 0 Neighs: 33 ave 33 max 33 min Histogram: 1 0 0 0 0 0 0 0 0 0 Total # of neighbors = 33 Ave neighs/atom = 0.0165 Neighbor list builds = 500 Dangerous builds = 0 if "${V_metal}>${V0_metal_times1000}" then "jump SELF unstable" jump SELF unstable print "ERROR: System volume ${V_metal} A^3 has become larger than ${V0_metal_times1000} A^3. Aborting calculation." ERROR: System volume 659632922.386186 A^3 has become larger than 173450804.563749 A^3. Aborting calculation. Total wall time: 0:00:10