CFD Online Discussion Forums

CFD Online Discussion Forums (https://www.cfd-online.com/Forums/)
-   Main CFD Forum (https://www.cfd-online.com/Forums/main/)
-   -   velocity profiles (https://www.cfd-online.com/Forums/main/3734-velocity-profiles.html)

Merac July 27, 2001 08:02
velocity profiles
 
Hi there, can anyone suggest the most accurate equation for a turbulent velocity profile in a pipe? I know standard fluid mechanics texts have them, but they are a bit too general. I want to compare the velocity profiles I am getting with my commercial code with the analytical approach. Thanks!

wang July 27, 2001 10:55
Re: velocity profiles
 
Do you mean instantaneous profile or time-averaged?

Peter July 28, 2001 08:31
Re: velocity profiles
 
There are several choices depending on the references. Some people use: (u/u0)=(y/delta)^(1/7) and you get the displacement thickness: delta*=delta/8

John C. Chien July 28, 2001 12:41
Re: velocity profiles
 
(1). Schlichting's book,"boundary layer theory" has a chapter on "turbulent flow through pipes" which includes various formula for velocity profile, with test data.


All times are GMT -4. The time now is 19:55.