I am working on a project in which there are several electronic components within a larger enclosure. Some of them are computers or other components with fans. While the vendors won't hand over a full thermal model, I know the intake flowrates, exhaust flowrates, deltaT from intake to exhaust, and case temperatures.
I am trying to model the airflow through these boxes with an "outlet volume flow" for the intake (air disappears from the system) and an "intake volume flow" for the exhaust (new hot air enters the simulation as if it were heated within the box). My problem is I can't find a way to model the deltaT with those boundary conditions. I want to make one X degrees hotter than the other, so is that even possible? The reason I need it is because the intake temp depends on some of the exhaust air recirculating.