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Showing results 1 to 6 of 6 Search took 0.00 seconds. Search: Posts Made By: Bernhard

Forum: OpenFOAM Programming & Development July 18, 2013, 01:59

Replies: 35 Meaning of "fvc::div(phi)" Views: 12,219 Posted By Bernhard Yes, this is extremely weird. phi only lives in... Yes, this is extremely weird. phi only lives in the discretized domain on faces of cells. The is no way you can do a volume integral over such a variable. Do you know how to derive the equation...

Forum: OpenFOAM Programming & Development July 16, 2013, 10:01

Replies: 35 Meaning of "fvc::div(phi)" Views: 12,219 Posted By Bernhard You apply the divergence theorem. ... You apply the divergence theorem. \int\limits_V^{} {\nabla \cdot udV} = \int\limits_{\partial V}u\cdot\hat{n}dS =\sum\limits_f {{u_f} \cdot {S_f} = 0} You can't integrate face values over a...

Forum: OpenFOAM Programming & Development July 16, 2013, 09:27

Replies: 35 Meaning of "fvc::div(phi)" Views: 12,219 Posted By Bernhard Be careful here. phi is a surfaceScalarField, so... Be careful here. phi is a surfaceScalarField, so there is always a direction vector defined by the face area vector.

Forum: OpenFOAM Programming & Development July 16, 2013, 08:49

Replies: 35 Meaning of "fvc::div(phi)" Views: 12,219 Posted By Bernhard The book are correct, but... The book are correct, but http://www.cfd-online.com/Forums/vbLatex/img/55f37c6f731ca8457a9314035ac33fb3-1.gif is valid without a mesh. If you integrate this equation over a control volume, this...

Forum: OpenFOAM Programming & Development July 16, 2013, 08:39

Replies: 35 Meaning of "fvc::div(phi)" Views: 12,219 Posted By Bernhard Can you be more specific? Can you be more specific?

Forum: OpenFOAM Programming & Development July 16, 2013, 08:35

Replies: 35 Meaning of "fvc::div(phi)" Views: 12,219 Posted By Bernhard No, because U is the cell centre value, and the... No, because U is the cell centre value, and the divergence is obtained from the face values, i.e. phi.

Showing results 1 to 6 of 6

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