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Old   March 22, 2012, 08:09
Default radiation heat transfer
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I have defined a simple plane model made of a transparent solid material (Energy/DO-model). At one side, a Wall boundary condition with mixed thermal conditions is assigned. The radiation BC type is "opaque". According to the given boundary condition, I have computed the Total Heat Transfer q and the Radiation Heat Transfer (RHT) q_str. A comparison with the values obtained with "Reports>Fluxes> ... Heat Transfer Rate" shows a good agreement regarding the Total Heat Transfer Rate. But the Fluent-result for q_str is about 15 % larger than the value given by "A eps sig (T_infinity^4-T_w^4)" (A is the area of the side with the Wall boundary condition). So my question is:

How does Fluent the Radiative Heat Transfer Rate compute?

Another question: Is there a possibility to get the Radiation Heat Transfer Rate for a specific surface and for a given Wavelength Interval (in a Non-Gray Model)?

Thanks and best regards.
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Old   September 5, 2012, 14:56
Negin Nazarian
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I have a same problem as you.

Have you figure out how does Fluent compute the Radiative Heat Transfer?

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