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y+ in a turbulent flow

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Old   July 8, 2013, 11:31
Default y+ in a turbulent flow
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Hi everyone,
i'm trying to model the turbulence in a free convective flow. What is an adequate value of y+ (so i can see if the dimension of the grid that i've generated is correct?). Now i'm using k epsilon model with standard wall functions.

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Old   July 10, 2013, 12:31
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Hi David,
First you decide which turbulence model is best suited for what you're trying to simulate.
Then you decide on the wall treatment you want to use.
You Y+ value will depend on both these things.
For example, the k epsilon model with standard wall functions requires a high value of Y+. generally between 100-300

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turbolence convective

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