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Thin Thermally Resistive Layer on top of Boundary Heat Source
Posted Jun 3, 2013, 6:17 a.m. EDT Heat Transfer & Phase Change Version 4.2a, Version 5.2 3 Replies
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Hello everybody,
I want to simulate a flat mikroheater on top of a foil that is covered by a liquid. Since the foil has a thickness of about 100µm and the liquid covering the heater has a height of 1mm, the heater's height of about 0,5µm is almost negligible. Additionally the heater is covered with a thin passivation layer with 5µm thickness.
To simulate the temperature increase of the heater I wanted to use "Boundary Heat Source" with a defined "Total boundary power". On top of it I wanted to use a "Thin thermally resistive Layer", but I did not find out how to defne two layers on top of each other.
Is there any possibility to do so?
Many thanks in advance
Bastian
I want to simulate a flat mikroheater on top of a foil that is covered by a liquid. Since the foil has a thickness of about 100µm and the liquid covering the heater has a height of 1mm, the heater's height of about 0,5µm is almost negligible. Additionally the heater is covered with a thin passivation layer with 5µm thickness.
To simulate the temperature increase of the heater I wanted to use "Boundary Heat Source" with a defined "Total boundary power". On top of it I wanted to use a "Thin thermally resistive Layer", but I did not find out how to defne two layers on top of each other.
Is there any possibility to do so?
Many thanks in advance
Bastian
3 Replies Last Post May 18, 2016, 1:50 a.m. EDT
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Posted:
1 decade ago
Hi,
probably it is not possible, see: "can comsol support multilayer shell?"
www.comsol.com/community/forums/general/thread/28316/
Best regards
Bastian
probably it is not possible, see: "can comsol support multilayer shell?"
www.comsol.com/community/forums/general/thread/28316/
Best regards
Bastian
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Posted:
1 decade ago
Hi Bastian,
This issue is different from multilayered shells. A boundary heat source is not a “layer”. It is strictly on the boundary. A thin thermally resistive layer has to be internal to the domain. If I understand your problem correctly you should create a line/surface offset from the boundary and apply the thermally resistive layer there.
Nagi Elabbasi
Veryst Engineering
This issue is different from multilayered shells. A boundary heat source is not a “layer”. It is strictly on the boundary. A thin thermally resistive layer has to be internal to the domain. If I understand your problem correctly you should create a line/surface offset from the boundary and apply the thermally resistive layer there.
Nagi Elabbasi
Veryst Engineering
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Posted:
9 years ago
when you say 'surface offset' that would mean a physical thin layer which would need a lot of elements and defeat the purpose of thin layer definitions.
may be i misunderstand
may be i misunderstand