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adiabatic wall boundary condition

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Old   April 14, 2011, 11:28
Default adiabatic wall boundary condition
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George Theo
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Hello

I'm using ANSYS CFX v12 to simulate the fluid flow and heat transfer in a rectangular duct. I impose an adiabatic wall boundary condition to the top surface of the fluid domain and a constant heat flux to the bottom one. The logical result is the absence of heat transfer near the upper wall. Instead the results I get show that the fluid is also heated from the top (adiabatic?!) wall. I have checked my boundary conditions and they are ok. Could the problem be related to the mesh? Any suggestions would be highly appreciated.

Thanks!
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Old   April 15, 2011, 06:55
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Glenn Horrocks
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No, an adiabatic wall should not heat no matter what you do.

What makes you think the adiabatic wall is heating it?
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Old   April 18, 2011, 09:06
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George Theo
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Thank you for your swift reply!
Unfortunately, I didn't interpret my results correctly. The fluid is heated due to the effect of the lateral wall. I was confused because the heating took place near the vicinity of the upper boundary. Sorry to trouble you!
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