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Law of the wall with pressure gradient

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Old   January 29, 2016, 09:22
Default Law of the wall with pressure gradient
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Tim
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Hi,

I know the Law of the wall in turbulent flows (i.e. at flat plate). Is this also valid in decelerated turbulent flows with positive pressure gradient and without separation?

Cheers, Schwimmy
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Old   January 29, 2016, 11:54
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david
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the law of the wall is based on a constant shear stress under the local equilibrium balance between production of turbulent kinetic energy and its dissipation rate. under adverse pressure gradient conditions, this is no longer valid and some modifications need to be made. this is why the k-epsilon with the standard wall function fails in such flows.
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Old   January 29, 2016, 12:17
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in this you can apply renyold stress model but it can increase your computation cost
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