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Forum: OpenFOAM Running, Solving & CFD

November 19, 2010, 02:22

Replies: 12

Newbie Question IcoFoam - Courant Number explodes

Views: 7,831

Posted By tcarrigan

Yeah, sorry...I just noticed I did make a few...

Yeah, sorry...I just noticed I did make a few changes to the fvSchemes and fvSolutions dictionaries.

For the divergence of velocity I chose the linearUpwindV scheme. It's a second order scheme...

Forum: OpenFOAM Running, Solving & CFD

November 18, 2010, 15:01

Replies: 12

Newbie Question IcoFoam - Courant Number explodes

Views: 7,831

Posted By tcarrigan

If you run checkMesh, it will show that there are...

If you run checkMesh, it will show that there are some non-orthogonal faces. Just bump up the number of non orthogonal correctors and should work just fine.

Forum: OpenFOAM Running, Solving & CFD

November 18, 2010, 15:00

Replies: 12

Newbie Question IcoFoam - Courant Number explodes

Views: 7,831

Posted By tcarrigan

Ok, I got it. I checked your mesh. In the...

Ok, I got it. I checked your mesh. In the fvSolution dictionary file, change the number of non orthogonal correctors to 2,

nNonOrthogonalCorrectors 2;

And it works just fine :)

Forum: OpenFOAM Running, Solving & CFD

November 18, 2010, 14:53

Replies: 12

Newbie Question IcoFoam - Courant Number explodes

Views: 7,831

Posted By tcarrigan

Looks ok. I did just notice something. Did you...

Looks ok. I did just notice something. Did you check your units? Seems you specify the velocity to be 0.001 and nu=1e-6. However, you specify your grid in mm correct? This would meen that the...

Forum: OpenFOAM Running, Solving & CFD

November 18, 2010, 14:19

Replies: 12

Newbie Question IcoFoam - Courant Number explodes

Views: 7,831

Posted By tcarrigan

I'm thinking the velocity is pretty high at the...

I'm thinking the velocity is pretty high at the outlet causing the Courant number to blow up. You might want to try tightening up the grid spacing at the inlet and outlet. If you can, post some pics...

Forum: OpenFOAM Running, Solving & CFD

November 18, 2010, 13:20

Replies: 12

Newbie Question IcoFoam - Courant Number explodes

Views: 7,831

Posted By tcarrigan

I tried running your case, and indeed it does...

I tried running your case, and indeed it does blow up. Could you please post a picture of your grid and/or geometry, I'm not quite sure what you're trying to simulate. To me it seems that it's a...

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