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-   -   Nvd / tvd (http://www.cfd-online.com/Forums/openfoam/93193-nvd-tvd.html)

MichiB October 7, 2011 11:19

Nvd / tvd
 
Hi,

I was wondering if there is a major difference in the implementation of NVD and TVD schemes in OpenFOAM.
Am I right in the assumption that the only real difference between NVD and TVD schemes in OpenFOAM is the limiters?
Is it right that in OpenFOAM TVD schemes are actually nothing but special NVD schemes?

I'm having a hard time grasping how convection schemes are implemented in OpenFOAM, but as far as I understand the code, both NVD and TVD should work identically up to the point where phict ( \Tilde{ phi_{C} } ) is being calculated.

The reason why I'm asking this is that I'd like to know how the van Leer TVD (or is it NVD?) scheme works and effects the diagonal dominance of my matrix...

Michi

santiagomarquezd October 7, 2011 16:30

Michael take a look to the document in the following link:

https://docs.google.com/viewer?a=v&p...ht7iRTTn&hl=es

Regards.

MichiB October 10, 2011 05:39

Thank you for the nice summery, Santiago. Te lo agradezco mucho!
It seems that I was wrong and TVD schemes in OpenFOAM do calculate r and not phict as I thought before.
Regards,
Michi


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