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Turbulence Modells - Overview

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Old   June 21, 2009, 03:59
Default Turbulence Modells - Overview
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BastiL
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Dear FOAMers,

I am currently doing some turbulence modeling benchmark. I miss some overview list about turbulence models in the documentation as it has been availabele in former releases I think.
Looking at the source code I see there is a kOmega SST model (I think it came with 1.4.1) but I don't know if this is a high-reynolds (wall-function) or a low-reynolds implementation? Are there some documents about that?

Thanks BastiL
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Old   June 22, 2009, 12:33
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Paulo Alexandre Costa Rocha
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Hi BastiL,

You can find some discussion on this topic here:

Turbulence Modells - Overview

Best Regards,

Paulo Rocha
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Old   June 22, 2009, 16:48
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BastiL
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Thanks paulo - however the link is linking to this thread?

Regards BastiL
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Old   June 23, 2009, 08:55
Red face I'm sorry
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Paulo Alexandre Costa Rocha
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Hi BastiL,

I hope this link is correct:

Bug in SpalartAllmaras

Sorry again.

Best Regards,

Paulo Rocha
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Old   April 19, 2010, 18:18
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For accurate boundary layer predictions, such as separation prediction, then the SST model should be used with y+<2. In this case, the SST model switches to a low-Re formulation near the wall rather than the wall function formulation. SST still works with 11<y+<300, but the results will be fairly similar to the k-e model since wall functions are used. For 2<y+<11, SST blends wall functions and low-Re formulations. In some situations, such as when needing accurate boundary layer heat transfer predictions or when using the transition model, an even lower y+ of about 1 is recommended with the SST model.
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