Thank so much for concern to my worries. This is a household anaerobic digester that does not require external energy source (electricity/impeller) for mixing regime. Usually, mixing in this digester comes as a result of backflow of slurry from tank B (inlet) to A (main tank) and is biogas outlet . The problem is mixing is usually not enough (inadequate). So I want to evaluate mixing in the digester using ansys. I already did some models in single-phase flow. I want to do multiphase flow with my 3D geometry. Basically i want to see the flow behaviou and flow intensity of the digester.