forked from lijiext/lammps
74 lines
1.7 KiB
Groff
74 lines
1.7 KiB
Groff
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LAMMPS (27 Mar 2011)
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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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variable x index 1
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variable y index 1
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units lj
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atom_style granular
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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 processor grid
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32000 atoms
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32000 velocities
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replicate $x $y 1
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replicate 2 $y 1
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replicate 2 2 1
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orthogonal box = (0 0 0) to (80 40 37.2887)
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4 by 1 by 1 processor grid
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128000 atoms
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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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3648 atoms in group bottom
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group active subtract all bottom
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124352 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 = 37.3912 Mbytes
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Step Atoms KinEng 1 Volume
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0 128000 3136556.5 6404.5051 119323.52
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100 128000 3137160 6284.0549 119327.22
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Loop time of 2.79202 on 4 procs for 100 steps with 128000 atoms
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Pair time (%) = 1.13366 (40.6034)
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Neigh time (%) = 0.0699974 (2.50705)
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Comm time (%) = 0.24415 (8.74457)
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Outpt time (%) = 0.00162953 (0.0583639)
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Other time (%) = 1.34259 (48.0866)
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Nlocal: 32000 ave 32000 max 32000 min
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Histogram: 4 0 0 0 0 0 0 0 0 0
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Nghost: 5456 ave 5456 max 5456 min
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Histogram: 4 0 0 0 0 0 0 0 0 0
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Neighs: 115135 ave 115135 max 115135 min
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Histogram: 4 0 0 0 0 0 0 0 0 0
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Total # of neighbors = 460540
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Ave neighs/atom = 3.59797
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Neighbor list builds = 2
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Dangerous builds = 0
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