does mesh/surface/stress/servo take the fluid pressure into consideration

Hi, everybody,
I am trying to use the mesh/surface/stress/servo command of liggghts to realize a constant-stress wall in a CFDEM case. I know that when establishing case using liggghts solely，the servo wall works fine. But if I want to use this command in a two-phase system including fluid and particles, does it consider the pressure which is induced by the fluid phase when adjusting the stress? Could anyone help me?~~

Thanks !