(no subject)

Hi

I want to simulate the Argon gas in a nano channel and i like to make a Hydropholic and hydrophobic wall for it. I know that I should change the LJ parameter between wall and fluid in my lammps input file. but i don’t know how to change it in lj unit.?? below is some of input file

dimension 2

boundary p s p

atom_style atomic

neighbor 0.3 bin

neigh_modify delay 5

lattice hex 0.7

region box block 0 20 0 10 -0.25 0.25

create_box 3 box

create_atoms 1 box

mass 1 1.0

mass 2 1.0

mass 3 1.0

pair_style lj/cut 1.12246

pair_coeff * * 1.0 1.0 1.12246

region 1 block INF INF INF 1.25 INF INF

group lower region 1

region 2 block INF INF 8.75 INF INF INF

group upper region 2

group boundary union lower upper

group flow subtract all boundary

set group lower type 2

set group upper type 3
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