posXYZ ucas.xyz
velXYZ ucas.vxyz
Ndim 2
dt 0.02
mu 1.0
size 5.0
therm 0
nav 100
skip 1
speedc 150.0
init_T 0.0
bond_str 100.0
wall_str 50.0
drag_str 10.0
rcut 2.5
safe 4000.0
fixed 
bonds 
