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-   -   Yplus (http://www.cfd-online.com/Forums/cd-adapco/52596-yplus.html)

Sabatini May 10, 2001 03:44

Yplus
 
hay people how i can estimate Yplus for k epsilon model thanks

allan May 13, 2001 07:20

Re: Yplus
 
flate plate: cf/2= 0.0359Re**(-.2) pipe: cf/2=0.039Re**(-.2)

compute friction velocity:

utau = Ue(cf/2)**.5

Ue - freestram velocity

wall functions;

y = 50nu/utau

nu - kinematic viscosity (m**2/s**2) y - distance from the wall

50 is Yplus, this can be some other number of course

allan

Sabatini May 14, 2001 04:19

Re: Yplus
 
thanks allan but by me i have a rectangularduct thanks

allan May 24, 2001 13:35

Re: Yplus
 
Use the hydraulid diameter for D then

cheers

allan


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