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Heat transfer across unmeshed gap
Posted Oct 9, 2009, 6:14 a.m. EDT 3 Replies
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Hello,
Problem:
a 2d filled circle material A surrounded by a gap and then that is surrounded by another material material B.
Material A is heat generating I would like to remove the heat from the edge of material A and use it as a value to heat the inner edge of material B, i have these edges as identity pairs so i can know the gap thickness as this is used to modify the edge to edge energy transfer.
I am not sure how to implement this, but i do not want to mesh the gap for other reasons. Any advice would be greatly appreciated.
Problem:
a 2d filled circle material A surrounded by a gap and then that is surrounded by another material material B.
Material A is heat generating I would like to remove the heat from the edge of material A and use it as a value to heat the inner edge of material B, i have these edges as identity pairs so i can know the gap thickness as this is used to modify the edge to edge energy transfer.
I am not sure how to implement this, but i do not want to mesh the gap for other reasons. Any advice would be greatly appreciated.
3 Replies Last Post Oct 10, 2009, 8:38 a.m. EDT
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Posted:
2 decades ago
Hi
I find it difficult to follow what you are trying to do, I would understand that the "gap" is of some material, or vacuum, hence there should be some real physical properties that you can set and work with 3 "materials".
But you can also integrated the temperature form the inner material boundary and distribute it over another boundary. For that I would suggest to use the integration boundary variables.
There is an example in the COMSOL documentation where they link the temperature of one wall to another, it uses a similar approach. Unfortunately I could not find it back, there are so many books to pass through.
Good luck
Ivar
I find it difficult to follow what you are trying to do, I would understand that the "gap" is of some material, or vacuum, hence there should be some real physical properties that you can set and work with 3 "materials".
But you can also integrated the temperature form the inner material boundary and distribute it over another boundary. For that I would suggest to use the integration boundary variables.
There is an example in the COMSOL documentation where they link the temperature of one wall to another, it uses a similar approach. Unfortunately I could not find it back, there are so many books to pass through.
Good luck
Ivar
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Posted:
2 decades ago
I am trying to avoid meshing the gap as the gap would eventually close, i was hoping to hide the gap in the linking of the two walls.
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Posted:
2 decades ago
Hi
Well I would start by studying the "GUIDE.PDF" COMSOL user guide, section "Using Coupling Variables"
Good luck
Ivar
Well I would start by studying the "GUIDE.PDF" COMSOL user guide, section "Using Coupling Variables"
Good luck
Ivar