walllaws
Hello, I'm interested in the walllaws for a turbulent fluid flow over a rough surface. Can I have more information about this subject, or some references? I already see the papers wich deal with the wall laws for the case of a laminar fluid flow over a rough surface but in the turbulent case there are some new problems. It's clear that the dimension of the rugosities in comparison with the thickness of the boundary layer is an important aspect. So I'm looking for some new elements for this turbulent case. Thank you. R.Militaru

Re: walllaws
(1). You can take a look at the book "Boundary Layer Theory" by Schlichting, McGrawHill. It covers the formula for rough surfaces.

Re: walllaws
Hi Militaru .. Plz look papers by Bijan Mohammadi (University of Paris) who published a recent paper on rough surface modeling using wall laws( IJNMF  1999). U will get more ref. from that.
btw what is the size of roughness u r looking for? ...is it micron size ? KSS 
Re: walllaws (KSS)
Thank you KSS. You can tell me exactly what means IJNMF1999, in order to have a rapidly acces to the papers? The size of roughness, I'm looking for is about of order of hundredths of milimetre.
Tank you, R.Militaru 
Re: walllaws
As most of the commercial codes, PHOENICS is equipped with builtin provision to handle the turbulent nearroughwall flow. The inderlying treatment and its validation followed by implementation details are fully described in the papers published in PHOENICS Journal of CFD.
The papers and other related documentation can be ordered online via cfdSHOP. Regards Sergei Zhubrin 
Re: walllaws (Militaru)
hi .. IJNMF means Int. Journal for Numerical Methods in Fluids. There is one more paper by Zhang, Fagri & F.M.White et. al. which may be found in ASME. J. Fluids Engg. (1996). page. no. 421 !!! ( i dont remember page no. exactly).
KSS 
Re: walllaws (KSS)
IJNMF meansInternational Journal of Numerical Methods in Fluids.
If you don't know even this dont west others time. Go to the Lib. and look arround. GS 
Re: walllaws (KSS)
Thank you very much. I'll try to obtain the full size version of the papers by the help of the Internet.
R.Militaru 
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