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Two-Layer Models and Wall Functions

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Old   June 18, 2010, 15:25
Default Two-Layer Models and Wall Functions
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Sameera Wijeyakulasuriya
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Hi,

Can anyone tell me why starcd (V4.10) requires to select a wall function (standard, non-eq. or angelberger) when using a Two-layer approach?

I was under the impression that when you use two-layer method, the normal k-epsilo equations are solved in th einterior nodes and a one-equation model (eg: norris & reynolds) is solved for in the NWLs.

Isn't the standard wall fuctions needed to model the near wall flow as we know the k-e model doesnot do a good job at the wall? But if we use a one-eqution model in the NWL, why do we have to use a wall function?

Thanks,

Sameera
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