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-   -   what is the computational formula of the grid spacings Δx+,Δy+,Δz+? (https://www.cfd-online.com/Forums/mesh-generation/115107-what-computational-formula-grid-spacings-x-y-z.html)

 Detian Liu March 24, 2013 04:24

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

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 Δz+=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?

 flotus1 March 24, 2013 05:02

http://www.cfd-online.com/Wiki/Dimen...e_%28y_plus%29

 Far April 26, 2013 11:48

Quote:
 Originally Posted by Detian Liu (Post 415958) 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 Δz+=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?