Atharva Nagarkar
Subscriber

Hello,

Please check my earlier post for clarification. It says that "The UDF will need to return the real value of the effective heat transfer coefficient to the solver. So, if the quantity being modeled by your UDF depends on the interfacial area, your UDF should return the coefficient multiplied by the interfacial area."

This is why in the example, the returned value is multiplied by the interface area.

Thanks!