lammps/examples/rigid/in.rigid.poems

# Simple rigid body system

units		lj
atom_style	atomic

pair_style	lj/cut 2.5

read_data	data.rigid

velocity 	all create 100.0 4928459

# unconnected bodies

#group		clump1 id <> 1 9
#group		clump2 id <> 10 18
#group		clump3 id <> 19 27
#group		clump4 id <> 28 36
#group		clump5 id <> 37 45
#group		clump6 id <> 46 54
#group		clump7 id <> 55 63
#group		clump8 id <> 64 72
#group		clump9 id <> 73 81

#fix 1 all rigid group 9 clump1 clump2 clump3 clump4 clump5 &
#	  	      clump6 clump7 clump8 clump9

# 1 chain of connected bodies

group		clump1 id <> 1 9
group		clump2 id <> 9 18
group		clump3 id <> 18 27
group		clump4 id <> 27 36
group		clump5 id <> 36 45
group		clump6 id <> 45 54
group		clump7 id <> 54 63
group		clump8 id <> 63 72
group		clump9 id <> 72 81

fix 1 all poems group clump1 clump2 clump3 clump4 clump5 &
	  	      clump6 clump7 clump8 clump9

# 2 chains of connected bodies

#group		clump1 id <> 1 9
#group		clump2 id <> 9 18
#group		clump3 id <> 18 27
#group		clump4 id <> 27 36
#group		clump5 id <> 37 45
#group		clump6 id <> 45 54
#group		clump7 id <> 54 63
#group		clump8 id <> 63 72
#group		clump9 id <> 72 81

#fix 1 all poems group clump1 clump2 clump3 clump4
#fix 2 all poems group clump5 clump6 clump7 clump8 clump9

neigh_modify	exclude group clump1 clump1
neigh_modify	exclude group clump2 clump2
neigh_modify	exclude group clump3 clump3
neigh_modify	exclude group clump4 clump4
neigh_modify	exclude group clump5 clump5
neigh_modify	exclude group clump6 clump6
neigh_modify	exclude group clump7 clump7
neigh_modify	exclude group clump8 clump8
neigh_modify	exclude group clump9 clump9

thermo		100

#dump		1 all atom 50 dump.rigid.poems

#dump		2 all image 100 image.*.jpg type type &
#		axes yes 0.8 0.02 view 60 -30
#dump_modify	2 pad 5

#dump		3 all movie 100 movie.mpg type type &
#		axes yes 0.8 0.02 view 60 -30
#dump_modify	3 pad 5

timestep 	0.0001
thermo		50
run		10000