Multiple boundary condition or interface assignments for the following entities: face79@Battery-14__Battery-13__Battery-12__Battery-11__Battery-10__Battery-9__Battery-8__Battery-7 I am analysing a flow in a room where there are batteries generating heat using conjugate heat transfer. I created a fl…

Hi @ialhassan , The linked project seems to be private, so I can’t know for sure what is wrong. Based on your description, you probably defined a boundary condition to an interface, which is not allowed. Please refer to figure 6 from this documentation page for more insights. PS: a couple of ways…

Thanks, my original assumption was correct: [image] Is this intended?

No it was not intended. But when I creat a flow region, the whole flow region is one construct so I can only assign one boundary condition to it. Would there be a different way to fix it?

Hi, it’s necessary to remove the “face79@battery-14(…)” assignment from the Wall 3 boundary condition. The other conditions can remain as they are.

yeah but I need those batteries at a fixed tempertaure or a constant heat flux. So if I removed them it would defeat the purpose of the simulation. Please advise

Please refer to my first response :slight_smile: [image] RicardoParis: PS: a couple of ways around it: Since the battery walls are at a fixed value anyway, you could potentially remove the batteries from the CAD model after generating a flow region, and set the fixed value boundary conditions…

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Multiple boundary conditions when only one is assigned to a face

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ialhassan November 30, 2021, 10:45pm 3

Just made it public. If you can take a look.