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Temperature shooting up to unrealistic values!

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Old   March 28, 2013, 00:22
Default Temperature shooting up to unrealistic values!
Join Date: Apr 2011
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Hey folks!

I am solving a transient natural convection problem. I have a 2D domain, with with my lower wall heated at a defined heat flux (nearly 10000 W/m2) and my upper wall acting as an outlet (heat sink, maybe). The sidewalls are symmetric walls (but can be pressure outlet/inlet, doesn't matter a lot).

The issue: Temperature at the lower wall (where heat flux b.c is imposed) shoots up to 700 K, which should realistically not happen. I am aware that the heat in this "enclosed" system needs to go out, but how should I go about doing this? Does anybody have any experience with such problems before? Any kind of help is appreciated.

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heat sink, natural convection, temperature problem

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