LAMMPS (18 Feb 2013) # Pour granular particles into chute container, then induce flow atom_style sphere boundary p p fm newton off communicate single vel yes region reg block -10 10 -10 10 -0.5 16 units box create_box 1 reg Created orthogonal box = (-10 -10 -0.5) to (10 10 16) 1 by 1 by 1 MPI processor grid neighbor 0.2 bin neigh_modify delay 0 # IMPORTANT NOTE: these values of stiffness (2000) 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 = 2.0e5 and dt = 0.0001, as in bench/in.chute. pair_style gran/hooke/history 2000.0 NULL 50.0 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 zlower all wall/gran 2000.0 NULL 50.0 NULL 0.5 0 zplane 0.0 2000.0 region slab block -9.0 9.0 -9.0 9.0 10.0 15.0 units box fix ins all pour 3000 1 300719 vol 0.13 50 region slab Particle insertion: 402 every 3162 steps, 3000 by step 22135 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 yes #dump id all atom 1000 dump.pour #dump 1 all image 1000 image.*.jpg type type # axes yes 0.8 0.02 view 80 -30 #dump_modify 1 pad 5 run 25000 Memory usage per processor = 9.46169 Mbytes Step Atoms KinEng 1 Volume 0 0 -0 0 6600 1000 402 779.98578 0 6600 2000 402 1424.4252 0 6600 3000 402 1425.0863 12.9927 6600 4000 804 1724.8532 47.325647 6600 5000 804 1598.6681 64.779741 6600 6000 804 1364.8231 61.75911 6600 7000 1206 1519.7287 69.028648 6600 8000 1206 1409.6162 62.604936 6600 9000 1206 1243.5299 53.012812 6600 10000 1608 1400.2632 57.300035 6600 11000 1608 1226.4327 53.185401 6600 12000 1608 1190.754 41.207269 6600 13000 2010 1309.6301 51.508727 6600 14000 2010 1182.74 46.857423 6600 15000 2010 985.17177 43.141534 6600 16000 2412 1041.1301 47.314349 6600 17000 2412 1038.3663 39.508439 6600 18000 2412 916.06571 39.312699 6600 19000 2814 1021.9901 42.073133 6600 20000 2814 959.466 41.811414 6600 21000 2814 761.2927 41.364383 6600 22000 2814 521.07124 40.192029 6600 23000 3000 423.49186 37.34074 6600 24000 3000 362.28297 22.586628 6600 25000 3000 223.45694 22.976343 6600 Loop time of 9.28813 on 1 procs for 25000 steps with 3000 atoms Pair time (%) = 5.36181 (57.7276) Neigh time (%) = 1.04765 (11.2794) Comm time (%) = 0.25077 (2.6999) Outpt time (%) = 0.000460148 (0.00495415) Other time (%) = 2.62743 (28.2881) Nlocal: 3000 ave 3000 max 3000 min Histogram: 1 0 0 0 0 0 0 0 0 0 Nghost: 669 ave 669 max 669 min Histogram: 1 0 0 0 0 0 0 0 0 0 Neighs: 13650 ave 13650 max 13650 min Histogram: 1 0 0 0 0 0 0 0 0 0 Total # of neighbors = 13650 Ave neighs/atom = 4.55 Neighbor list builds = 1153 Dangerous builds = 0 unfix ins fix 2 all gravity 1.0 chute 26.0 run 25000 Memory usage per processor = 10.2619 Mbytes Step Atoms KinEng 1 Volume 25000 3000 223.45694 22.976343 6600 26000 3000 113.473 17.666374 6600 27000 3000 102.76936 12.540567 6600 28000 3000 179.07068 11.501122 6600 29000 3000 289.11251 14.028808 6600 30000 3000 461.92265 17.681677 6600 31000 3000 710.67032 23.209353 6600 32000 3000 991.22981 30.179598 6600 33000 3000 1366.0205 36.321028 6600 34000 3000 1817.0366 45.963988 6600 35000 3000 2329.5052 51.957397 6600 36000 3000 2938.7862 59.654677 6600 37000 3000 3662.828 70.399596 6600 38000 3000 4375.2295 78.906063 6600 39000 3000 5250.4031 92.018452 6600 40000 3000 6032.6969 100.23325 6600 41000 3000 7053.8661 115.73204 6600 42000 3000 8063.1636 122.38643 6600 43000 3000 9181.8348 143.39138 6600 44000 3000 10270.31 149.34715 6600 45000 3000 11434.53 161.47217 6600 46000 3000 12731.277 171.19811 6600 47000 3000 13938.907 170.91903 6600 48000 3000 15244.449 192.6018 6600 49000 3000 16627.76 195.3851 6600 50000 3000 17863.962 213.64088 6600 Loop time of 18.2656 on 1 procs for 25000 steps with 3000 atoms Pair time (%) = 11.864 (64.9527) Neigh time (%) = 1.57208 (8.60681) Comm time (%) = 0.539768 (2.95511) Outpt time (%) = 0.000703335 (0.0038506) Other time (%) = 4.28904 (23.4816) Nlocal: 3000 ave 3000 max 3000 min Histogram: 1 0 0 0 0 0 0 0 0 0 Nghost: 755 ave 755 max 755 min Histogram: 1 0 0 0 0 0 0 0 0 0 Neighs: 13875 ave 13875 max 13875 min Histogram: 1 0 0 0 0 0 0 0 0 0 Total # of neighbors = 13875 Ave neighs/atom = 4.625 Neighbor list builds = 803 Dangerous builds = 0