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Forum: OpenFOAM Running, Solving & CFD

November 28, 2011, 02:06

Replies: 9

Newby with a runaway Courant number

Views: 1,678

Posted By alberto

This usually happens when you specify boundary...

This usually happens when you specify boundary conditions erroneously, over-constraining the problem. Could you post your case so those who follow the thread can try to fix it?

Forum: OpenFOAM Running, Solving & CFD

November 22, 2011, 15:04

Replies: 9

Newby with a runaway Courant number

Views: 1,678

Posted By alberto

Isn't a zeroGradient condition sufficient (if the...

Isn't a zeroGradient condition sufficient (if the flow is fully developed it should be) for your U?

Best,

Forum: OpenFOAM Running, Solving & CFD

November 22, 2011, 03:01

Replies: 9

Newby with a runaway Courant number

Views: 1,678

Posted By alberto

If your flow is incompressible, your problem is...

If your flow is incompressible, your problem is fully defined when you specify the velocity at one boundary, since you have a simple channel. Fix whatever value of the pressure at the outlet (the...

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