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Radiation ANSYS Fluent

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Old   September 22, 2022, 18:00
Default Radiation ANSYS Fluent
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Bob
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Hello,

I have a problem with a simulation in ANSYS Fluent. In the model I have a simple rectangular model room and it is heated from below and cooled from above (Rayleigh Benard cell). I would like to investigate the radiation influence. For this I activate the Rosseland model. However, the average temperature after simulation is too high. Normally it should be the average of the temperature above and below. The average temperature (volume average) is much higher after the simulation.
Does anyone have an explanation. Do I need to activate other things besides the Rosseland model if I want to investigate the radiation?
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