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-   -   Estimation of First Grid Point Near Wall (http://www.cfd-online.com/Forums/fluent/40730-estimation-first-grid-point-near-wall.html)

Amer Mahmood April 24, 2006 13:01

Estimation of First Grid Point Near Wall
 
Hi, Iam simulating flow in a rectangular channel and using enhanced wall treatment in Fluent. For estimation of Ist grid point (y+=1) I am using the following relation:

y+=(density)*(yp)*(turbulent velocity)/(dynamic viscosity); turbulent velocity = average velocity * SQRT(Cf/2)

where yp = distance from the wall

Cf = friction coefficient

Is this process fine???

Rags April 25, 2006 09:47

Re: Estimation of First Grid Point Near Wall
 
Yes, it is perfectly fine... Use Cf value according to ur flow calculations...I mean for Turbulent flows..

Ralf Schmidt April 25, 2006 11:49

Re: Estimation of First Grid Point Near Wall
 
have a look at

http://www.cfd-online.com/Forum/main...cgi?read=44320

Ralf


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