Learning Forum

[Randy92]

Hello, I have a simulation with a heat source inside a glass tube and I want to know how much heat is escaping throusgh the wall. See picture. The simulation is set on Axisymmetric Swirl.
Once the simulation is done I go to Reports => Flux Reports => Total Heat Transfer Rate then I select the outer wall of the glass wall that is facing the Atmosphere and press compute. Ansys says:
Total Heat Transfer Rate [W]
------------------------------------ ---------------------------------
Glass Atm 37.67
User Energy Source 320.89
----------------------------------- ----------------------------------
Net 357.89
If I understand it right the heat flow going out of the tube is the 37.67 W and the heat created inside the reactor is 320.89 W. We calculated that the heat generated inside the reactor should be 640 W which is two times the value Ansys gives. So is anys diving it by two or are we doing something wrong?

[Kishan Konannavar]

Hello
For the purpose of clarity could you share images of the boundary conditions used and how you arrived at 640W value. And in the flux reports is the net heat transfer across all boundaries coming close to 0?

Thank you
Regards
Kishan