forked from lijiext/lammps
64 lines
1.5 KiB
Groff
64 lines
1.5 KiB
Groff
LAMMPS (10 Jan 2012)
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# LAMMPS benchmark of granular flow
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# chute flow of 32000 atoms with frozen base at 26 degrees
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units lj
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atom_style sphere
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boundary p p fs
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newton off
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communicate single vel yes
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read_data data.chute
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orthogonal box = (0 0 0) to (40 20 37.2886)
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2 by 1 by 2 MPI processor grid
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32000 atoms
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32000 velocities
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pair_style gran/hooke/history 200000.0 NULL 50.0 NULL 0.5 0
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pair_coeff * *
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neighbor 0.1 bin
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neigh_modify every 1 delay 0
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timestep 0.0001
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group bottom type 2
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912 atoms in group bottom
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group active subtract all bottom
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31088 atoms in group active
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neigh_modify exclude group bottom bottom
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fix 1 all gravity 1.0 chute 26.0
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fix 2 bottom freeze
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fix 3 active nve/sphere
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compute 1 all erotate/sphere
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thermo_style custom step atoms ke c_1 vol
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thermo_modify norm no
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thermo 100
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run 100
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Memory usage per processor = 15.2765 Mbytes
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Step Atoms KinEng 1 Volume
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0 32000 784139.13 1601.1263 29830.88
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100 32000 784289.99 1571.0137 29831.804
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Loop time of 0.146905 on 4 procs for 100 steps with 32000 atoms
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Pair time (%) = 0.0729731 (49.6735)
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Neigh time (%) = 0.0111947 (7.62035)
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Comm time (%) = 0.0153095 (10.4213)
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Outpt time (%) = 0.000119746 (0.0815122)
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Other time (%) = 0.0473083 (32.2033)
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Nlocal: 8000 ave 8010 max 7990 min
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Histogram: 2 0 0 0 0 0 0 0 0 2
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Nghost: 2439 ave 2452 max 2426 min
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Histogram: 2 0 0 0 0 0 0 0 0 2
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Neighs: 29503.5 ave 30500 max 28507 min
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Histogram: 2 0 0 0 0 0 0 0 0 2
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Total # of neighbors = 118014
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Ave neighs/atom = 3.68794
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Neighbor list builds = 2
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Dangerous builds = 0
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