I want to simulate two phase flow in porous media by LBM. I actually coded SC BGK D2Q9 and simulated my problem but the results weren’t satisfactory. I recently read that because of BounceBack error BGK can’t simulate very well porous media problems so we must use two relaxation time(TRT) or multirelaxation time(MRT). But i can’t use MRT because its computational price is very high besides my problem domain is very large so i consider using TRT.I think the only difference between BGK and TRT is symmetric and anti-symmetric parameters in collision operator. is this true? are there any other differences? Does anyone help me to find two relaxations time articles or share me a simple code?
Thanks a lot in advance