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-   -   Fixed mean temperature boundary condition for developing flow (http://www.cfd-online.com/Forums/openfoam/90880-fixed-mean-temperature-boundary-condition-developing-flow.html)

mohsen cheraghi July 22, 2011 18:09

Fixed mean temperature boundary condition for developing flow
 
Dear all
My problem is to implement a temperature BC for the outlet of a developing flow in a channel when there is a constant heat flux at its walls. As we know the gradient of mean temperature is fixed. I tried fixedGradient and applied the fixed gradient to all profiles but it does not work, specially for high prandtls. I also tried fixedMeanValue but it does not work too!!
Is there a BC in openFoam to implement fixed mean temperature or fixed gradient mean temperature?
Thanks

mrshb4 July 24, 2011 12:33

Dear Mohsen

You should use second derivative boundary condition in your case(d2t/dn2 = 0) . if you google for those words you will find it!!!

khosh bashi
Mohammadreza Shetab

mohsen cheraghi July 24, 2011 13:06

ممنون از لطفتون آقای شتاب


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