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Forum: OpenFOAM Running, Solving & CFD February 7, 2009, 15:07
Replies: 25
Views: 5,895
Posted By henrik
Vishal, @I) I tried to sugg

Vishal,

@I) I tried to suggest the following:

Replace

0 = K1 * laplacian(C1) + K2 * laplacian (phi)
0 = K1 * laplacian(C2) + K2 * laplacian (phi)
K3 * laplacian (phi) = beta(C1,...
Forum: OpenFOAM Running, Solving & CFD February 7, 2009, 05:37
Replies: 25
Views: 5,895
Posted By henrik
a) Okay b) Okay, I understand

a) Okay
b) Okay, I understand that the solution has bounds (C1 > 0 C2 > 0) which are violated
c) One hint: s = Phi and v = grad(C2).

One more thing: Do you understand what the conservative...
Forum: OpenFOAM Running, Solving & CFD February 6, 2009, 16:19
Replies: 25
Views: 5,895
Posted By henrik
Yes, now you are at right at t

Yes, now you are at right at the beginning where the becomes interesting:

a) Why do you have ddt-terms if you are seeking a steady-state solution?

b) Change all relaxation factors to 0.001...
Forum: OpenFOAM Running, Solving & CFD February 6, 2009, 13:28
Replies: 25
Views: 5,895
Posted By henrik
Spend an "s" on "relaxationFac

Spend an "s" on "relaxationFactor" will make your day.

Henrik
Forum: OpenFOAM Running, Solving & CFD February 6, 2009, 04:10
Replies: 25
Views: 5,895
Posted By henrik
Vishal, I think you should

Vishal,

I think you should have opened one thread for the complete problem. It also makes it easier for you to find the answers ;-). For interested third parties: BCs are dealt with in this...
Forum: OpenFOAM Running, Solving & CFD February 3, 2009, 11:56
Replies: 25
Views: 5,895
Posted By henrik
Hi Vishal, @code: Yes, if y

Hi Vishal,

@code: Yes, if you don't forget PhiEqn.solve() later.

@equation: This is exactly what Phi.relax() does - Explicit relaxation.

In implicit relaxation (PhiEqn.relax()) the...
Forum: OpenFOAM Running, Solving & CFD February 2, 2009, 07:03
Replies: 25
Views: 5,895
Posted By henrik
There are two forms of relaxat

There are two forms of relaxation. One is operating and on the field (Phi.relax()) to be used after solving and the other is operating on the matrix (PhiEqn.relax()). The latter is the one you want....
Forum: OpenFOAM Running, Solving & CFD November 29, 2008, 14:59
Replies: 25
Views: 5,895
Posted By henrik
I have no experience with PNP,

I have no experience with PNP, but this might help.

http://groups.google.com/group/sci.math.num-analysis/browse_thread/thread/ec5e96 b20472d308?pli=1...
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