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July 12, 2005, 13:08
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wall function method
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Guest
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I have developed code for k-e model and it is applied for square lid driven cavity for Re=480000. it is working well, and when it is for rectangular cavity with x:y 1:3, it is not giving good results. I will be thankful if can anybody suggest me regarding this.
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July 20, 2005, 02:55
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Re: wall function method
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Some instability of the large-scale flow may develop. In this case your RANS method may become too inaccurate. Even in the square case, the small-scales of corner flow calculated seems OK?
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July 20, 2005, 16:31
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Re: wall function method
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Does any alternative is there to overcome this...
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July 21, 2005, 20:54
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Re: wall function method
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I am not quite sure how to improve a RANS scheme, add more Numerical Viscosity to suppress those instabilities or reduce NV to model. A more accurate model may work, but that type of instability is more subtle and probably inherent in the flow itself.
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