How to set the BC on a wall that is under monitoring using UDF?

11 November 2018 0 7K Report

Hi everyone

I'm using a special UDF to monitor the temperature on a wall. So the BC at that wall is unknown I want it as output of the simulation. I only know that at the beginning of simulation its temperature is 293 K and I want fluent to give me a data of temperature vs time of that wall. My questionis, how should I set the BC of the wall in the boundary condition panel?

what I did is setting the operating temperature to 293 K, then in Thermal Conditions> I ticked the Radiation option, I adjust the value of the external emissivity to 0.8. I could not decide about the external radiation temperature. Do I have to leave it as 293 or set it as zero. what do you think?

Any help is much appreciated

Regards

Oula

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