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Fluid flow due to temperature differences
Posted 30 nov 2012, 02:13 GMT-5 Fluid & Heat, Heat Transfer & Phase Change Version 4.3a 1 Reply
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Hello,
This is not my strong side so I would appreciate some recommendations.
I want to calculate the cooling oil flow in a cylindrical geometry in which there are a number of heat producing elements. The oil should change its specific weight due to the heat transfer and this should result in a free flow.
I would probably need more than one physical model, i.e. heat transfer and buoyant flow.
In Comsol I found some possibilities, such as single phase flow and multi phase flow.
As I said, this is not my strong side.
Are there any experts who can lead me to the right area?
Thank you
Kamil
This is not my strong side so I would appreciate some recommendations.
I want to calculate the cooling oil flow in a cylindrical geometry in which there are a number of heat producing elements. The oil should change its specific weight due to the heat transfer and this should result in a free flow.
I would probably need more than one physical model, i.e. heat transfer and buoyant flow.
In Comsol I found some possibilities, such as single phase flow and multi phase flow.
As I said, this is not my strong side.
Are there any experts who can lead me to the right area?
Thank you
Kamil
1 Reply Last Post 30 nov 2012, 14:31 GMT-5
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Posted:
1 decade ago
Hi
if you are only in the liquid and solid heat transfer, you have the conjugated heat flow physics, that for me seems the appropriate. You need to give the correct material (fluid and sold) parameters, in particular their temperature dependence too, which means a non linear model, that will, because of all he DoF you will have, be a heavy model solving slowly, but you should get your way like that.
If you have true phase change (liquid boiling and vapour, then OK you need more and you model will really become heavy ;)
--
Good luck
Ivar
if you are only in the liquid and solid heat transfer, you have the conjugated heat flow physics, that for me seems the appropriate. You need to give the correct material (fluid and sold) parameters, in particular their temperature dependence too, which means a non linear model, that will, because of all he DoF you will have, be a heavy model solving slowly, but you should get your way like that.
If you have true phase change (liquid boiling and vapour, then OK you need more and you model will really become heavy ;)
--
Good luck
Ivar