Automation for auxiliary flow rate when using heat exchanger module on fluent

[cheolmae]

I would like to use the Heat Exchanger module for flow analysis inside a factory. In particular, I am trying to do an unsteady analysis that controls the coil's auxiliary flow rate depending on the temperature at a specific location, but I am wondering if UDF or Expression cannot be applied.

Does anyone know if there is a solution for this?

[Rob]

Looking at the panel, I suspect it's a no for Expressions as there isn't an option to hook them in. There might be some UDF hooks, but as I can't see a hook in the panel, nor the UDF function hooks I can't say for sure. There might be some semi-hidden options but I don't know, and if I found out I'd be unable to comment on the Forum. 

Note, the heat exchanger model was added for a few specific purposes as an addon in about v6 so may lack the user function hooks if they're hard coded elsewhere in Fluent. 

An alternative might be to code up a DEFINE_SOURCE UDF for energy and write your own version.