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Heat transfer coefficient

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Old   October 29, 2010, 03:04
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Attached Images
File Type: jpg 2Dmodel Velocity.JPG (54.4 KB, 28 views)
File Type: jpg 2Dmodel Temp.JPG (56.1 KB, 20 views)
File Type: jpg Vel.jpg (67.1 KB, 24 views)
File Type: jpg Tem.jpg (68.8 KB, 25 views)

Last edited by xyq102296; November 3, 2010 at 15:05.
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Old   October 31, 2010, 07:57
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Dear xyq102296

Do you know how to mesh the fluid flow over the fins?
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Old   October 31, 2010, 14:49
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Fins? THere are some tutorials about that.
But is this related to my problem?
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Old   November 1, 2010, 10:02
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Michael P. Owen
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It looks like the inlet conditions are different maybe. Like yours has a higher temperature at the core.

I can see from the thickness of the baffles/fins that the meshes are different. Have you checked for mesh independence in your solution?
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Old   November 1, 2010, 11:53
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Quote:
Originally Posted by michael_owen View Post
It looks like the inlet conditions are different maybe. Like yours has a higher temperature at the core.

I can see from the thickness of the baffles/fins that the meshes are different. Have you checked for mesh independence in your solution?
Hello Michael,

THe inlet condition is same, I got the data of inlet speed and inlet temperature from the material.
How to check the mesh independence? I am new about this part.
Do you know how to define the inflation layer thickness, because I think I add the heat flux on the wall, so the first layer thickness is quite important, I don't how to define that number in my laminar flow model.
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Old   November 1, 2010, 11:54
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You should be asking your instructor these sorts of basic questions.
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Old   November 1, 2010, 11:55
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and for these picture, the model is 2D model, 5mm width and 2meters long, this picture is just the upper part of the model, the whole model looks like this
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Old   November 30, 2010, 17:53
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Can someone explain what sort of problem is this?
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