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what is the computational formula of the grid spacings Δx+,Δy+,Δz+?

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Old   March 24, 2013, 05:24
Default what is the computational formula of the grid spacings Δx+,Δy+,Δz+?
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Detian Liu
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Hi all,
I am a beginner of CFD, recently I have read a paper said that"The maximum grid spacing in terms of wall units is Δx+=20 in streamwise direction, Δy+=19 in spanwise direction, and Δz+=1 near the dune surface."
But I do not know the computational formula of the grid spacings Δx+,Δy+,Δz+, could you tell me the definition about it, or give me some papers to read?
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Old   March 24, 2013, 06:02
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http://www.cfd-online.com/Wiki/Dimen...e_%28y_plus%29
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Old   April 26, 2013, 12:48
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Quote:
Originally Posted by Detian Liu View Post
Hi all,
I am a beginner of CFD, recently I have read a paper said that"The maximum grid spacing in terms of wall units is Δx+=20 in streamwise direction, Δy+=19 in spanwise direction, and Δz+=1 near the dune surface."
But I do not know the computational formula of the grid spacings Δx+,Δy+,Δz+, could you tell me the definition about it, or give me some papers to read?
Are you talking about LES?
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