Understanding turbFoam sourcecode

lasb · July 31, 2007, 09:47

Hi,

In the turbFoam.C file under // Momentum predictor there is a line which says:

+ turbulence->divR(U)

What does that mean? Or where can I read about it? It hasn't been possible for me to find it in the OpenFOAM guide. Furthermore there is a minus in front of some equalitysigns. How do I interpret that?

I really hope that someone can help me.

Regards

Lasse

hjasak · July 31, 2007, 10:21

What you are looking at is the contribution of the turbulence model to the momentum equation, which comes in (its most general) matrix form.

Have a look at the k-epsilon model code to see what's in there, it should be clear (basically a laplacian with nu_t + nu_l).

Enjoy,

Hrv

July 31, 2007, 09:47	Hi, In the turbFoam.C file	#1
lasb Member Lasse Boehling Join Date: Mar 2009 Posts: 35 Rep Power: 17	Hi, In the turbFoam.C file under // Momentum predictor there is a line which says: + turbulence->divR(U) What does that mean? Or where can I read about it? It hasn't been possible for me to find it in the OpenFOAM guide. Furthermore there is a minus in front of some equalitysigns. How do I interpret that? I really hope that someone can help me. Regards Lasse

July 31, 2007, 10:21	What you are looking at is the	#2
hjasak Senior Member Hrvoje Jasak Join Date: Mar 2009 Location: London, England Posts: 1,905 Rep Power: 33	What you are looking at is the contribution of the turbulence model to the momentum equation, which comes in (its most general) matrix form. Have a look at the k-epsilon model code to see what's in there, it should be clear (basically a laplacian with nu_t + nu_l). Enjoy, Hrv __________________ Hrvoje Jasak Providing commercial FOAM/OpenFOAM and CFD Consulting: http://wikki.co.uk

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