LAMMPS (8 Feb 2023) OMP_NUM_THREADS environment is not set. Defaulting to 1 thread. (src/comm.cpp:98) using 1 OpenMP thread(s) per MPI task # Pour 2d granular particles into container dimension 2 atom_style sphere boundary f fm p newton off comm_modify vel yes region reg block 0 100 0 50 -0.5 0.5 units box create_box 1 reg Created orthogonal box = (0 0 -0.5) to (100 50 0.5) 4 by 1 by 1 MPI processor grid neighbor 0.2 bin neigh_modify delay 0 # IMPORTANT NOTE: these values of stiffness (4000) and timestep (0.001) # are used in this example file to produce a quick simulation and movie. # More appropriate values for realistic simulations would be # k = 4.0e5 and dt = 0.0001, as in bench/in.chute (if it were Hertzian). pair_style gran/hertz/history 4000.0 NULL 100.0 NULL 0.5 0 pair_coeff * * timestep 0.001 fix 1 all nve/sphere fix 2 all gravity 1.0 spherical 0.0 -180.0 fix xwalls all wall/gran hertz/history 4000.0 NULL 100.0 NULL 0 1 xplane 0 100 fix ywalls all wall/gran hertz/history 4000.0 NULL 100.0 NULL 0 1 yplane 0 NULL region slab block 1.0 99.0 30 34.5 -0.5 0.5 units box fix ins all pour 1000 1 4767548 vol 0.4 10 diam range 0.5 1.0 region slab Particle insertion: 224 every 3000 steps, 1000 by step 12001 fix 3 all enforce2d compute 1 all erotate/sphere thermo_style custom step atoms ke c_1 vol thermo 1000 thermo_modify lost ignore norm no compute_modify thermo_temp dynamic/dof yes #dump id all atom 250 dump.pour #dump 2 all image 500 image.*.jpg type type # zoom 1.6 adiam 1.5 #dump_modify 2 pad 5 #dump 3 all movie 500 movie.mpg type type # zoom 1.6 adiam 1.5 #dump_modify 3 pad 5 run 25000 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 = 1.2 ghost atom cutoff = 1.2 binsize = 0.6, bins = 167 84 2 1 neighbor lists, perpetual/occasional/extra = 1 0 0 (1) pair gran/hertz/history, perpetual attributes: half, newton off, size, history pair build: half/size/bin/newtoff stencil: full/bin/2d bin: standard Per MPI rank memory allocation (min/avg/max) = 5.77 | 5.77 | 5.77 Mbytes Step Atoms KinEng c_1 Volume 0 0 -0 0 5000 1000 224 202.80417 0 5000 2000 224 373.00249 0 5000 3000 224 599.26757 0 5000 4000 448 1078.4787 0 5000 5000 448 1589.4845 0 5000 6000 448 1743.8281 26.918824 5000 WARNING: Fewer insertions than requested (src/GRANULAR/fix_pour.cpp:681) 7000 669 1818.5075 88.370238 5000 8000 669 1850.1368 105.77613 5000 9000 669 1757.9791 107.52328 5000 WARNING: Fewer insertions than requested (src/GRANULAR/fix_pour.cpp:681) 10000 886 1792.8816 79.515458 5000 11000 886 1639.0751 64.104716 5000 12000 886 1541.1046 55.902437 5000 13000 1000 1461.0291 68.011357 5000 14000 1000 1286.1144 48.551003 5000 15000 1000 1155.6137 55.503871 5000 16000 1000 833.49034 46.163926 5000 17000 1000 581.69308 43.140124 5000 18000 1000 369.375 37.675729 5000 19000 1000 188.74424 31.66369 5000 20000 1000 48.73107 23.067611 5000 21000 1000 27.652985 14.176945 5000 22000 1000 22.545416 9.6960211 5000 23000 1000 17.575825 6.6345699 5000 24000 1000 12.464163 4.9073459 5000 25000 1000 9.9507487 3.1967219 5000 Loop time of 0.793403 on 4 procs for 25000 steps with 1000 atoms Performance: 2722450.224 tau/day, 31509.841 timesteps/s, 31.510 Matom-step/s 99.2% CPU use with 4 MPI tasks x 1 OpenMP threads MPI task timing breakdown: Section | min time | avg time | max time |%varavg| %total --------------------------------------------------------------- Pair | 0.2392 | 0.24458 | 0.25441 | 1.2 | 30.83 Neigh | 0.075663 | 0.07738 | 0.078869 | 0.4 | 9.75 Comm | 0.037752 | 0.045698 | 0.049012 | 2.2 | 5.76 Output | 0.00063359 | 0.0006788 | 0.00078796 | 0.0 | 0.09 Modify | 0.30883 | 0.3111 | 0.31377 | 0.3 | 39.21 Other | | 0.114 | | | 14.36 Nlocal: 250 ave 254 max 244 min Histogram: 1 0 0 0 0 0 0 2 0 1 Nghost: 19.75 ave 28 max 11 min Histogram: 1 0 1 0 0 0 0 0 1 1 Neighs: 600 ave 624 max 569 min Histogram: 1 0 0 1 0 0 0 0 1 1 Total # of neighbors = 2400 Ave neighs/atom = 2.4 Neighbor list builds = 2138 Dangerous builds = 0 Total wall time: 0:00:00