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Forum: OpenFOAM

June 29, 2011, 04:05

Replies: 11

Second Derivative Zero - Boundary Condition

Views: 8,741

Posted By eugene

Well, you calculate the gradient of the field in...

Well, you calculate the gradient of the field in question and then for each face in your boundary find the the cell adjacent to it. You then set the gradient on the boundary equal to the surface...

Forum: OpenFOAM

June 27, 2011, 17:06

Replies: 11

Second Derivative Zero - Boundary Condition

Views: 8,741

Posted By eugene

No you don't edit fixedGradient. You find another...

No you don't edit fixedGradient. You find another boundary that is derived from fixedGradient, copy it to another name and then edit it.

Forum: OpenFOAM

June 22, 2011, 17:28

Replies: 11

Second Derivative Zero - Boundary Condition

Views: 8,741

Posted By eugene

There might be other ways, but I use a fixed...

There might be other ways, but I use a fixed gradient boundary and then set the gradient on the boundary equal to n.grad(f) in the near wall cell. So if the gradient normal to the wall is equal to...

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