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Coefficient Form PDE with two dependent variables

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Hi,

I am trying to model the following equation by using COSOL 5.2;

dP/dt+ f(A)* d2P/dx2+ f(A)* d2P/dy2+g(A)*d2P/dz2+ h(P,t)=0
where;
P and A are dependent variables (A is not a constant)
t, x, y and z are independent variables.
f, g and h are functions of those variables..

I'm trying to use the coefficient form PDE but I'm having difficulty in putting the coefficient (c and the others), and I don't think I can divide them into two physics because A depends on P and t. the same goes for P. it also depends on A and t..
Any suggestions will be great here. Thanks in advance.

Eman

0 Replies Last Post 2017年8月3日 GMT-4 09:47
COMSOL Moderator

Hello Eman Salman

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