|August 27, 2007, 08:43||
Hi everybody, I have a prob
Join Date: Mar 2009
Posts: 4Rep Power: 8
I have a problem with the surface interpolation, in particular with the weighting factors of owner and neighbour cell values, for they are always scalars. But I need tensors as weighting factors for my interpolation of the velocity U.
OpenFOAM doesn't provide such an option or am I missing something? I'm quite new here.
Does someone already use such a scheme? And how can I use these weighting tensors for constructing the fvVectorMatrix of the convection term?
By the way, I'm working with OpenFOAM-1.3.
Thanks for your help.
|August 27, 2007, 11:00||
As I said in the other posting
Join Date: Mar 2009
Location: London, England
Posts: 1,766Rep Power: 21
As I said in the other postings, you have to be very very careful with this sort of thing:
- is the thing you are interpolating actually a vector? If so, having different interpolation factors for each component would violate Galilean invariance. Think about rotating your reference coordinate system by 30 deg and doing the same thing again: will you get the same result?
- do you wish to make ANYTHING related to your interpolation implicit? If so, this implies a block-coupled matrix and this is something I am still working on.
I assume you are on the wrong track if what you do has any relation with fluid flows, heat transfer or any other "standard" physics. If not, drop me an E-mail and let's talk.
Providing commercial FOAM/OpenFOAM and CFD Consulting: http://wikki.co.uk
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