mcfish-thermal
commented
4 years ago Rinaldo,
Yes. The program does not create dedicated half volume cells for feature boundaries. However, if you create a two dimensional feature at the surface or interface, you can force the program to create nodes at that surface for interrogation purposes.
Since these nodes do not have an associated volume, they have no thermal mass. They will obey a strict bilinear thermal profile between the volume nodes on either sides based on conductivity (or HTC) alone, even in the face of a transient analysis. They can be used as heat generation sources if you want to create an area heat flux boundary. If you place them on the surface of an adiabatic boundary, they will simply compute the same temperature as the underlying volume node (i.e. they can’t be used to fudge the lumped mass matrix formulation). That can be a bit of a drag when you are creating partial models using mirror symmetry.
Let me know if that is enough for your purposes.
Mike
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Hi - I was reading the manual and I don't understand what the domain of the solution is. It looks like the solution is calculated at the center of the mesh cell and therefore any solution value searched on a surface/interface between features would have to be extrapolated over a half-cell span. Is that correct?
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RinaldoMiorini
Hi - I was reading the manual and I don't understand what the domain of the solution is. It looks like the solution is calculated at the center of the mesh cell and therefore any solution value searched on a surface/interface between features would have to be extrapolated over a half-cell span. Is that correct?