Reply To: Gas-liquid turbulent flows with LBM
Hi zshi,
defining a constant pressure via the corresponding density at the outlet leads to undesired results, because in the multiphase case your density is linked to the state of your fluid.
In order to allow gas and liquid phase to leave your domain through the outlet, I suggest to define a constant velocity boundary with the flow facing outwards. The inlet should in this case be a constant pressure boundary with the pressure corresponding to the state of the influx fluid.
Cheers,
Max