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- - **High speed flow with Launder-Sharma-k-epsilon-Model**
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High speed flow with Launder-Sharma-k-epsilon-ModelDear All,
I need to run a compressible high speed nozzle flow in OF on a low-Re mesh (y+<1). So far I did my calculations with the kOmegaSST turbulence model and it worked quite nice. Now I have to use the k-Epsilon turbulence model on the same mesh. The only low-Re k-epsilon turbulence for a compressible case available in OF is the one by Launder and Sharma. I compared the code of the LaunderSharmaKE with the standard kEpsilon model and found some differences as additional source-terms as well as some turbulent Reynolds-number functions. So I have some questions, hoping anybody can answer these: - Is it okay to use the Launder-Sharma k-e-model for such a case?
- How does this turbulence model behave in regions far away from the wall? Does it differ from the standard k-epsilon model or are thes modifications only due to near wall regions?
- As my y+-values are everywhere below 1.0, I can not use wall functions. Any other suggestions to solve this flow problem with a k-epsilon model?
Thanks in advance! Sebastian |

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