Fixed Temperature Boundary Condition on Thin Structure Fracture

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Dear COMSOL Community,

I am working with COMSOL Multiphysics 6.3 and I have a question regarding boundary conditions for heat transfer in a fracture modeled as a Thin Structure.

In my model, the fracture is not represented as a separate meshed volume, but rather as a thin structure. I would like to impose a constant temperature boundary condition directly on the fracture surface/edge, similar to prescribing a fixed temperature on the fracture boundary.

Has anyone encountered this situation before? Is there a way to reproduce such a boundary condition when the fracture is defined as a Thin Structure? Or is it necessary to model the fracture as a separate physical domain in order to apply this type of temperature condition?

Any suggestions or examples would be greatly appreciated.


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