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Convergence Problem in Turbulent Air Flow with Natural Convection

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Dear All
I have a problem regarding the solution of a simple case of turbulent air flow around a heated obstacle. The case combines heat transfer and turbulent flow (k-eplson). When I put the volume force (free convection) equal to zero, the case solves very smoothly. However when I put the volume force = -rho * 9.81 it does not solve. I tried making mesh coarse or fine, doesn't work.
Your help is highly appreciated.
Thanks
Ahmed

0 Replies Last Post Mar 11, 2012, 9:06 p.m. EDT
COMSOL Moderator

Hello Ahmed Eissa

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