Surya Deb
Ansys Employee
Hello, nThose terms represent the viscous and inertial drags , respectively imposed by the pore walls on each phase . They have been implemented like sink terms in the momentum equation. So you don't need to have the squared terms for the porosity and the volume fraction. In your UDF, you can just specify the inverse of permeability. Also keep in mind that the relative permeability will be set to 1 if you are not using the capillary pressure model. nYes, the mixture model should have similar model implementation but using mixture averaged velocity. nBut having said that, please do test it using a model that you can validate the results for from experiments or analytical data.nThis will give you more confidence on your model parameters and setup.nI hope this helps.nRegards,nSuryan