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-   -   Standard k-epsilon based Nonequilibrium turbulent viscosity model (http://www.cfd-online.com/Forums/openfoam-programming-development/113129-standard-k-epsilon-based-nonequilibrium-turbulent-viscosity-model.html)

nikesh February 13, 2013 03:23

Standard k-epsilon based Nonequilibrium turbulent viscosity model
 
3 Attachment(s)
I have been trying to implement a non equilibrium turbulent viscosity model (Akira Yoshizawa et al.) into OpenFOAM. The turbulence quantities (k and epsilon) are governed by the same equations of the standard k-epsilon model.

At the moment I am trying to validate my code for the case of a 2D flat plate turbulent boundary layer and compare the results I've obtained using LaunderSharmaKE model. I could obtain the results but they are not making sense to me. I have attached here the equations of the model and the code that I have used. I also have included the results.

I have as well made use of a low Reynolds-number corrections as proposed by Abe et al. I have included those equations too.

I would be really thankful if someone with insights in this field looked into it and shed me some light in this matter.

Thanks in advance!!
Nikesh.

nikesh February 13, 2013 03:53

Result files
 
5 Attachment(s)
The result file is attached here.

What I have done here is that I have limited the blending functions.

1. min(fMu,1) and min(sqr(Rt), 50)
2. fMu-limited, Rt-not limited
3. fMu-not limited, Rt-limited


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