Sand filter modeling?
I wish to model the flow of a liquid through varying layers of sand in a filtration bed. How in general would this problem be approached and is it possible. Any help is appreciated. thanks

Re: Sand filter modeling?
I am modeling a closely related problem using an Eulerian approach. It works relatively ok. Hope this helps
Sincerely A. 
Re: Sand filter modeling?
Eulerian multiphase model is appropriate one because your sand layer is varying. However, Eulerian multiphase modeling is very difficult and require extensive computing work. Simple single(liquid) phase calculation somtimes might be very good approximation if your sand layer is varying not rigously. In this case, porous medium approach is common one.
Sincerely, Jinwook 
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