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How to implement this boundary condition?
Posted Sep 5, 2022, 10:08 p.m. EDT Heat Transfer, Modeling Tools & Definitions, Physics Interfaces Version 5.5 1 Reply
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Hi, I would like to know how can I implement this boundary condition for a heat transfer phenomenon in a 2D axisymmetric study.
Initially I was using the genereal inward heat flux option:
Where:
, with 
.
For 
: 
and for 
: 
.
Due to the gradient operator (
) in the boundary condition, I have my doubts if my approach is correct. My geometries are two concentric circles, representing different domains.
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You don't need to do anything. Assuming you have a typo in your first equation, where the second k1 is k2, then your equation is heat flux continuity at an internal boundary. That is implemented by default in COMSOL across any internal boundary. Just draw your concentric circles, provide boundary conditions on external boundaries, and solve.