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lammps/bench/log.21May08.chute.scaled.linux.4
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LAMMPS (21 May 2008)
# LAMMPS benchmark of granular flow
# chute flow of 32000 atoms with frozen base at 26 degrees
variable x index 1
variable y index 1
units lj
atom_style granular
boundary p p fs
newton off
read_data data.chute
orthogonal box = (0 0 0) to (40 20 37.2886)
2 by 1 by 2 processor grid
32000 atoms
32000 velocities
replicate $x $y 1
replicate 2 $y 1
replicate 2 2 1
orthogonal box = (0 0 0) to (80 40 37.2887)
4 by 1 by 1 processor grid
128000 atoms
pair_style gran/history 200000.0 50.0 0.5 0
neighbor 0.1 bin
neigh_modify every 1 delay 0
timestep 0.0001
group bottom type 2
3648 atoms in group bottom
group active subtract all bottom
124352 atoms in group active
neigh_modify exclude group bottom bottom
fix 1 all gravity 1.0 chute 26.0
fix 2 bottom freeze
fix 3 active nve/sphere
compute 1 all erotate/sphere
thermo_style custom step atoms ke c_1 vol
thermo_modify norm no
thermo 100
run 100
Memory usage per processor = 35.1222 Mbytes
Step Atoms KinEng 1 Volume
0 128000 3136556.5 6404.5051 119323.52
100 128000 3137160 6284.0549 119327.22
Loop time of 3.33027 on 4 procs for 100 steps with 128000 atoms
Pair time (%) = 1.5792 (47.4197)
Neigh time (%) = 0.089829 (2.69735)
Comm time (%) = 0.305364 (9.16934)
Outpt time (%) = 0.00202274 (0.0607381)
Other time (%) = 1.35385 (40.6529)
Nlocal: 32000 ave 32000 max 32000 min
Histogram: 4 0 0 0 0 0 0 0 0 0
Nghost: 5456 ave 5456 max 5456 min
Histogram: 4 0 0 0 0 0 0 0 0 0
Neighs: 115135 ave 115135 max 115135 min
Histogram: 4 0 0 0 0 0 0 0 0 0
Total # of neighbors = 460540
Ave neighs/atom = 3.59797
Neighbor list builds = 2
Dangerous builds = 0
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