# Turbulence Intensity

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 November 12, 2003, 06:01 Turbulence Intensity #1 Tom Guest   Posts: n/a How do I calculate the turbulence intensity at the inlet of my pipe section to apply as a boundary condition. The pipe is 203mm in diameter and I know the reynolds number is 8.58e+06. Do I need to know any other information to calculate this?

 November 12, 2003, 06:50 Re: Turbulence Intensity #2 eric Guest   Posts: n/a Hi, You can used the following I = 0.16*Re^-1/8 Also see 6.2.2 in the Fluent manual Eric

 November 12, 2003, 06:55 Re: Turbulence Intensity #3 prasanth Guest   Posts: n/a Dear Eric, Then what will be the Intesity for natural convection, where Rayleigh number is criteria.

 November 14, 2003, 07:07 Re: Turbulence Intensity #4 B. David Guest   Posts: n/a eric, can u name the reference for this correlation, n if u know the correlation for turbulent dissipiation rate.plz let me know. thanks for this information. david

 November 14, 2003, 09:53 Re: Turbulence Intensity #5 eric Guest   Posts: n/a I'm sorry have no experience with natural convection problems so i can't tell you anything about the turbulence intensity. I just referred to the fluent manual 6.2.2 for this intensity formula. Regards Eric