lammps/bench/log.12Feb07.chute.lmp.scale...

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LAMMPS (12 Feb 2007)
# 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
2 by 2 by 2 processor grid
32000 atoms
32000 velocities
replicate $x $y 1
replicate 2 $y 1
replicate 2 4 1
2 by 4 by 1 processor grid
256000 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
7296 atoms in group bottom
group active subtract all bottom
248704 atoms in group active
neigh_modify exclude group bottom bottom
fix 1 all gravity chute 26.0
fix 2 bottom freeze
fix 3 active nve/gran
thermo_style granular
thermo 100
run 100
Memory usage per processor = 32.76 Mbytes
Step Atoms KinEng RotKEgrn Volume
0 256000 6273113 12809.01 238647.04
100 256000 6274319.9 12568.11 238654.43
Loop time of 5.47474 on 8 procs for 100 steps with 256000 atoms
Pair time (%) = 2.62579 (47.9619)
Neigh time (%) = 0.159791 (2.9187)
Comm time (%) = 0.68137 (12.4457)
Outpt time (%) = 0.00449485 (0.0821015)
Other time (%) = 2.0033 (36.5916)
Nlocal: 32000 ave 32000 max 32000 min
Histogram: 8 0 0 0 0 0 0 0 0 0
Nghost: 5463 ave 5463 max 5463 min
Histogram: 8 0 0 0 0 0 0 0 0 0
Neighs: 115133 ave 115133 max 115133 min
Histogram: 8 0 0 0 0 0 0 0 0 0
Total # of neighbors = 921064
Ave neighs/atom = 3.59791
Neighbor list builds = 2
Dangerous builds = 0