forked from lijiext/lammps
136 lines
4.7 KiB
Groff
136 lines
4.7 KiB
Groff
LAMMPS (27 Mar 2011)
|
|
# 2d LJ obstacle flow
|
|
|
|
dimension 2
|
|
boundary p s p
|
|
|
|
atom_style atomic
|
|
neighbor 0.3 bin
|
|
neigh_modify delay 5
|
|
|
|
# create geometry
|
|
|
|
lattice hex 0.7
|
|
Lattice spacing in x,y,z = 1.28436 2.22457 1.28436
|
|
region box block 0 40 0 10 -0.25 0.25
|
|
create_box 3 box
|
|
Created orthogonal box = (0 0 -0.321089) to (51.3743 22.2457 0.321089)
|
|
1 by 1 by 1 processor grid
|
|
create_atoms 1 box
|
|
Created 840 atoms
|
|
|
|
mass 1 1.0
|
|
mass 2 1.0
|
|
mass 3 1.0
|
|
|
|
# LJ potentials
|
|
|
|
pair_style lj/cut 1.12246
|
|
pair_coeff * * 1.0 1.0 1.12246
|
|
|
|
# define groups
|
|
|
|
region 1 block INF INF INF 1.25 INF INF
|
|
group lower region 1
|
|
120 atoms in group lower
|
|
region 2 block INF INF 8.75 INF INF INF
|
|
group upper region 2
|
|
120 atoms in group upper
|
|
group boundary union lower upper
|
|
240 atoms in group boundary
|
|
group flow subtract all boundary
|
|
600 atoms in group flow
|
|
|
|
set group lower type 2
|
|
120 settings made for type
|
|
set group upper type 3
|
|
120 settings made for type
|
|
|
|
# initial velocities
|
|
|
|
compute mobile flow temp
|
|
velocity flow create 1.0 482748 temp mobile
|
|
fix 1 all nve
|
|
fix 2 flow temp/rescale 200 1.0 1.0 0.02 1.0
|
|
fix_modify 2 temp mobile
|
|
|
|
# Poiselle flow
|
|
|
|
velocity boundary set 0.0 0.0 0.0
|
|
fix 3 lower setforce 0.0 0.0 0.0
|
|
fix 4 upper setforce 0.0 NULL 0.0
|
|
fix 5 upper aveforce 0.0 -0.5 0.0
|
|
fix 6 flow addforce 1.0 0.0 0.0
|
|
|
|
# 2 obstacles
|
|
|
|
region void1 sphere 10 4 0 3
|
|
delete_atoms region void1
|
|
Deleted 36 atoms, new total = 804
|
|
region void2 sphere 20 7 0 3
|
|
delete_atoms region void2
|
|
Deleted 35 atoms, new total = 769
|
|
|
|
fix 7 flow indent 100 sphere 10 4 0 4
|
|
fix 8 flow indent 100 sphere 20 7 0 4
|
|
fix 9 all enforce2d
|
|
|
|
# Run
|
|
|
|
timestep 0.003
|
|
thermo 1000
|
|
thermo_modify temp mobile
|
|
WARNING: Temperature for thermo pressure is not for group all
|
|
|
|
dump 1 all atom 100 dump.obstacle
|
|
#dump 1 all custom 100 dump.custom id type x y z vx vy
|
|
|
|
run 25000
|
|
Memory usage per processor = 2.06342 Mbytes
|
|
Step Temp E_pair E_mol TotEng Press Volume
|
|
0 1.0027471 0 0 0.68849216 0.463265 1142.8674
|
|
1000 1 -0.33689286 0 0.34971312 1.2907615 1286.5545
|
|
2000 1 -0.36746164 0 0.31914434 1.1670767 1313.2217
|
|
3000 1 -0.52004751 0 0.16655848 1.4180076 1324.2707
|
|
4000 1 -0.50683859 0 0.17976739 1.4853867 1370.6777
|
|
5000 1 -0.49212307 0 0.19448291 1.2865932 1411.3324
|
|
6000 1 -0.45795739 0 0.22864859 1.242781 1441.6839
|
|
7000 1 -0.443252 0 0.24335398 1.2417302 1445.4704
|
|
8000 1 -0.37679433 0 0.30981165 1.1957462 1448.9419
|
|
9000 1 -0.41492237 0 0.27168361 1.0747045 1450.089
|
|
10000 1 -0.40197739 0 0.28462859 1.0279259 1456.1397
|
|
11000 1 -0.43056157 0 0.25604441 1.0722172 1449.4829
|
|
12000 1 -0.41156343 0 0.27504255 1.1499381 1452.9273
|
|
13000 1 -0.41466957 0 0.27193641 1.0548151 1455.565
|
|
14000 1 -0.41349951 0 0.27310647 1.0064325 1459.8774
|
|
15000 1 -0.4058151 0 0.28079088 0.96339054 1459.8033
|
|
16000 1 -0.37996671 0 0.30663928 1.0352366 1455.9433
|
|
17000 1 -0.35238448 0 0.3342215 0.94045311 1467.1239
|
|
18000 1 -0.39054272 0 0.29606326 1.0575731 1462.7124
|
|
19000 1 -0.36310964 0 0.32349634 0.97451832 1467.3645
|
|
20000 1 -0.37725444 0 0.30935154 0.98660138 1461.9506
|
|
21000 1 -0.37974771 0 0.30685827 0.94488958 1460.4569
|
|
22000 1 -0.35523952 0 0.33136646 1.0169815 1461.2727
|
|
23000 1 -0.36389429 0 0.32271169 1.0120096 1467.6367
|
|
24000 1 -0.40916195 0 0.27744403 0.95800623 1463.0811
|
|
25000 1 -0.39382698 0 0.292779 0.95226646 1460.6167
|
|
Loop time of 3.50378 on 1 procs for 25000 steps with 769 atoms
|
|
|
|
Pair time (%) = 0.838852 (23.9413)
|
|
Neigh time (%) = 0.201731 (5.75751)
|
|
Comm time (%) = 0.0474997 (1.35567)
|
|
Outpt time (%) = 0.516879 (14.752)
|
|
Other time (%) = 1.89882 (54.1935)
|
|
|
|
Nlocal: 769 ave 769 max 769 min
|
|
Histogram: 1 0 0 0 0 0 0 0 0 0
|
|
Nghost: 44 ave 44 max 44 min
|
|
Histogram: 1 0 0 0 0 0 0 0 0 0
|
|
Neighs: 1647 ave 1647 max 1647 min
|
|
Histogram: 1 0 0 0 0 0 0 0 0 0
|
|
|
|
Total # of neighbors = 1647
|
|
Ave neighs/atom = 2.14174
|
|
Neighbor list builds = 1647
|
|
Dangerous builds = 0
|