UDF or any approach for Bulk Temperature calculation
 

How to compute bulk or mean temperature inside a pipe subjected to constant heat flux.

As every one know that we can give fixed temperature in report panel, but mean temperature varies over the length. Hence computed nusselt number or heat tranfer does not match with theoritical data.

Slicing the pipe and finding the area weighted average and computing the HTC is one method.

But i need an UDF or any approach which can help to compute bulk temperature.

Thanks for your help.