how to add a hydro-static pressure in LIGGGHTS

Submitted by tala on Fri, 04/21/2017 - 12:00

Dear all
I am working on a coupled cfd-dem model, I am using stress servo walls for DEM part, and I want to know is it possible to use fix mesh/surface/stress/servo and fix box/relax simultaneously?
dose fix box/relax is appropriate option for implementing a hydro-static pressure?
any help is appreciated.
Talat