HELP - Derive 2-phase 3-dimesional PD flow equation

by nandz
Tags: 2phase, 3dimesional, derive, equation, flow
nandz is offline
Jan22-08, 01:59 PM
P: 1
1. The problem statement, all variables and given/known data
Hello All, I'd please like some help in deriving a 2-phase 3-dimensional partial differential flow equation from first principles.

2. Relevant equations
I know that the starting point is Darcy's flow equation.

3. The attempt at a solution
A key step is substituting the Darcy flow equation into the material balance equation, but I don't know how to get from there to the final equation for a 2-phase 3-dimensional flow.

Many thanks for helping out.
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