Learning Forum

[accounting]

Hi,

I have an issue with setting up a conjugate heat transfer simulation with the following geometry.

A thin cylindrical vessel holding a liquid with a thin heater film applied as a patch on about 60% of outer surface of the vessel. There is a layer of insulation around all the heater film as well as vessel and the insulation is exposed to room temperature on the outer surface.

I have the heat flow in watts as the boundary condition on the cylindrical heater surface located between vessel outer surface and insulation inner surface. However, I cannot setup a region interface between the heater and insulation. I tried sharing topology and played around with manually setting up region interface with high thermal conductance but neither of them worked. I either get the error that the heater surface is being used both as a region interface and boundary condition (cannot solve physics) or an unrealistic solution where no heat transfer between heater and insulation is happening. I do not know what I am missing in the setup here. How do you setup a coupled wall condition in AIM?

[Naresh Patre]

Hello Rahul Mulinti

In Discovery AIM, faces that are a part of the region interface can't be used again for defining boundary conditions. To overcome this behavior, you can make use of Heat Source (Volumetric heat source) from solid thermal conditions and define the heat source on solid bodies. Based on the problem definition, I think you will have to split the thin cylindrical vessel which represents 60% of the region in order to apply the heat source.

[accounting]

Naresh Patre Thanks for the response, I managed to find a work around by splitting my geometry as you mentioned.