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Forum: OpenFOAM Community Contributions

April 11, 2013, 18:06

Replies: 6

[swak4Foam] ARE zeroGradient in groovyBC and internalFiald different in result?

Views: 1,653

Posted By gschaider

If the difference between a zeroGradient (Neuman)...

If the difference between a zeroGradient (Neuman) boundary condition and a Dirichlet-condition (fixedValue) that takes the value of the next cell is unclear to you: I doubt it.

I don't...

Forum: OpenFOAM Community Contributions

March 31, 2013, 19:20

Replies: 6

[swak4Foam] ARE zeroGradient in groovyBC and internalFiald different in result?

Views: 1,653

Posted By gschaider

If you have difficulties with the concept either ...

If you have difficulties with the concept either
- leave your fingers of it (99.5% of all users don't need internalField)
- read a textbook (like Versteeg "An introduction to compuational fluid...

Forum: OpenFOAM Community Contributions

March 30, 2013, 10:49

Replies: 6

[swak4Foam] ARE zeroGradient in groovyBC and internalFiald different in result?

Views: 1,653

Posted By gschaider

That is NOT the implementation of a...

That is NOT the implementation of a zeroGradient-BC. zeroGradient (and fractionExpression "0") say: "manipulate the matrix in such a way that whatever value internalField(U) has the boundary value is...

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