I was trying to incorporate sediment volumetric concentration equation in interFoam. I have attched the equation here as a image file. Please have a look to the equations. I have to construct another phi, since my convecting velocity (U) has been changed to (U+Vs). how to proceed ? Looking for any valuable suggestion. Thanks.
I may not be able to give you the specific details of the changes to be made, but you can get some insight from the document in the link below. The document details addition of gravity to an incompressible solver, simpleFoam.