Rob
Ansys Employee

I suspect the poor cells are where the pipes go through the casing. You may also be better off using a thin wall and using a porous jump rather than porous media. Hard to tell from the images, and we're limited in how much detailed help we can give in an open forum. 


Is the brown volume to assist in the initialisation, or when you say the basket is full do you mean the unit has part filled with debris?