mirror of https://github.com/lammps/lammps.git
74 lines
1.7 KiB
Groff
74 lines
1.7 KiB
Groff
LAMMPS (10 Jan 2012)
|
|
# 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 sphere
|
|
boundary p p fs
|
|
newton off
|
|
communicate single vel yes
|
|
|
|
read_data data.chute
|
|
orthogonal box = (0 0 0) to (40 20 37.2886)
|
|
2 by 1 by 2 MPI 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 MPI processor grid
|
|
128000 atoms
|
|
|
|
pair_style gran/hooke/history 200000.0 NULL 50.0 NULL 0.5 0
|
|
pair_coeff * *
|
|
|
|
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 = 37.0464 Mbytes
|
|
Step Atoms KinEng 1 Volume
|
|
0 128000 3136556.5 6404.5051 119323.52
|
|
100 128000 3137160 6284.0549 119327.22
|
|
Loop time of 0.893496 on 4 procs for 100 steps with 128000 atoms
|
|
|
|
Pair time (%) = 0.524706 (58.7251)
|
|
Neigh time (%) = 0.0462004 (5.17075)
|
|
Comm time (%) = 0.0590464 (6.60847)
|
|
Outpt time (%) = 0.00043273 (0.0484311)
|
|
Other time (%) = 0.26311 (29.4473)
|
|
|
|
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
|