[brandonh63]

Hello,

I am trying to write a UDF in Fluent that will first calculate the surface area of any given wall, then obtain the surface heat flux through that wall. I will then need to supply those values to a DEFINE_SOURCE UDF that will be used to calculate volumetric heat loss through the corresponding cell zone.

What macros will I need to use to obtain the surface heat flux from the wall, store the surface area and heat flux in a specified memory location, and then pass the surface area and heat flux values to the DEFINE_SOURCE UDF?

Any assistance would be greatly appreciated.

Thanks

[AlexanderZ]

you may take a look here as a start
"Segmentation fault" when using UDFs in Fluent

I'm not sure if there is macro to get heat flux through the wall
probably, you would need to write it by your own

I recommend you to read ansys fluent customization manual, here you can find some examples
there is a macro DEFINE_HEAT_FLUX which is not what you need, however, could be useful as a basis