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# Big colloid particles and small LJ particles
units lj
atom_style sphere
dimension 2
lattice sq 0.01
region box block 0 30 0 30 -0.5 0.5
create_box 2 box
create_atoms 1 box
set group all type/fraction 2 0.96 23984
set type 1 mass 9
set type 2 mass 1
velocity all create 1.44 87287 loop geom
# multi neighbor and comm for efficiency
neighbor 1 multi
neigh_modify delay 0
comm_modify mode multi
# colloid potential
pair_style colloid 12.5
pair_coeff 1 1 1.0 1.0 5.0 5.0 12.5
pair_coeff 1 2 5.0 1.0 5.0 0.0 7.0
pair_coeff 2 2 10.0 1.0 0.0 0.0 2.5
fix 1 all npt temp 2.0 2.0 1.0 iso 0.0 1.0 10.0 drag 1.0 &
mtk no pchain 0 tchain 1
fix 2 all enforce2d
#dump 1 all atom 1000 dump.colloid
#dump 2 all image 1000 image.*.jpg type type &
# zoom 1.5 center d 0.5 0.5 0.5
#dump_modify 2 pad 5 adiam 1 5.0 adiam 2 1.5
#dump 3 all movie 1000 movie.mpg type type &
# zoom 1.5 center d 0.5 0.5 0.5
#dump_modify 3 pad 5 adiam 1 5.0 adiam 2 1.5
thermo_style custom step temp epair etotal press vol
thermo 1000
timestep 0.005
run 50000
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