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-   -   BC Profile with Turbulent Intensity (http://www.cfd-online.com/Forums/cfx/76065-bc-profile-turbulent-intensity.html)

blackbody May 13, 2010 03:36

BC Profile with Turbulent Intensity
 
hi everybody!

can i use turbulent intensity (%) as a profile boundary condition?
when i look at the "standard variable names" in CFX helper i only
see that i can specify k (turbulence kinetic energy) as a profile bc parameter.
if i use k in the profile BC, than CFX ask me for epsilon (turbulent dissipation rate). i dont have epsilon though....
any suggestion?

thank you very much!

ghorrocks May 13, 2010 07:10

Turbulence intensity % just defines the turbulence intensity (k) as a function of flow velocity. It does not define the second variable required to specify the turbulence inlet condition. You will need to specify an epsilon, turbulence length scale, turbulence viscosity scale or some other independent turbulence parameter to define the second turbulence variable.


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