Time-mean Nusselt Number
Im looking for a suggestion on how to do this in the best way:
I would like to calculate time-mean Nusselt number but I do not trust pre-defined Nu# in fluent. ( I am solving radiation as well as convection and the value for total heat transfer coefficient accounts for both)
I would like to calculate Nusselt number from temperature gradient and I know there is a UDF for that purpose.
However, how would it be possible to calculate the time-mean temperature gradient?
I also dont think I can use custom field function for this purpose since it wont be possible to get the time-mean value.
Any suggestion would be great.
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