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isothermal solution of chtMultiRegionFoam

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Old   September 16, 2012, 05:14
Default isothermal solution of chtMultiRegionFoam
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Pierre
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Hi,

I am running a simple 2D problem with chtMultiRegionFoam. On the bottom of the domain, I have a thiner solid region. On top, a air region with air flowing on the solid.

First, I would like to test the isothermal problem. I set ALL my boundary conditions to: T=300.
On the postproc, I checked that at time=0 I have everything at T=300.

But during the solution, the temperature in the fluid domain raises!
I don't know where this heat comes from since I have everything at the same temperature.
Any idea?

Attached image is the T field at the end of the solution.

Thanks,
pilafa
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File Type: jpg tfinal.jpg (21.2 KB, 23 views)
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Old   October 1, 2012, 11:10
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hello,

have you tried a more densed mesh? or a low maximum Courant number (/lower timestep)?

ciao
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