Generalized wall functions for turbulent flows with strong adverse pressure gradient |
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Authors: | D Ph Sikovsky |
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Institution: | 1.Kutateladze Institute of Thermophysics, Siberian Branch,Russian Academy of Sciences,Novosibirsk,Russia;2.Novosibirsk State University,Novosibirsk,Russia |
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Abstract: | The generalized wall functions for turbulent flows with strong adverse pressure gradients are derived on the basis of the
asymptotic theory of near-wall turbulence. The generalized wall functions have a correct asymptotic behavior in the limit
of zero friction velocity and can be applied to computations of flows under a strong adverse pressure gradient and with separation
or reattachment. Calculations of a turbulent boundary layer in a strong adverse pressure gradient with the aid of the developed
modified k-ɛ model of turbulence and comparison with the experimental data validate the advantages of the generalized wall functions over
traditional wall functions based on the logarithmic law of the wall. |
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Keywords: | |
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