[mullenc525]

I am evaluating heat transfer between different duct geometries. I want to be able to calculate HTC as h=q/(twall-tbulk). Then I want to take that htc and average it over an area.

I am having difficulty doing this symbolically, versus at a point. For example, to get bulk temp, I need to take an area average of temperature over a location, like ave(Temperature)@Plane 1. The problem is, I want the location to vary, instead of an xy plane at point z, I want z to vary. This way, I would get tbulk as a function of z.

Does anybody know how to do this?

I do not want to use expert parameters to set tbulk constant. This would cause h to decrease in the streamwise direction as the fluid heats, and would make it a pain for me to compare different geometry.