[gmx-users] semi isotropic settings

[Elisabeth]

Hi all,

I wanted to use Pcoupltype          =  semiisotropic    but I am not clear
about the compressibility settings if I want to keep Z directions fixed in
my system and letting X and Y change. Which case 1 or 2 is correct for semi
isotropic option?

1) compressibility     =  3.5e-5 3.5e-5 0

2 ) or compressibility     =  1 0?
Manual says 2 values are needed for x/y and z directions respectively.

Thanks