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Old   January 30, 2010, 23:37
Default Heat Transfer Coefficient
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los
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Tiago Macarios
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I just installed openFOAM, so sorry if the question sounds stupid, but how do I set a heat transfer coefficient and prescribed heat flux in the laplacian solver?

I have this routine in fluent which I just simulate the solid with standard heat transfer conditions (heat tranfer coefficient, fixed temperature and prescribed heat flux) and I want to try to port it to openFOAM. Later I will need to run a optimizer and it looks like openFOAM can be reasonably faster.

Any suggestion? Thanks
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Old   January 31, 2010, 13:09
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Eelco Gehring
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You can set a fixed heat flux by setting a temperature gradient BC. Look in /0/T
There is a similar procedure for the fixed temperature.

type gradient
value uniform 8 (the gradient value)

type fixedValue
value uniform 400 (temperature value)
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Old   January 31, 2010, 16:22
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Thank you, but how do I set the heat transfer coefficient? and the reference temperature?
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Old   January 31, 2010, 17:16
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I don't know an easy way to set that up.
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Old   January 31, 2010, 18:14
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Thats something unexpected =O

can you give me just give me some start instructions about the hard way?
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Old   January 31, 2010, 18:44
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I would say that you have to implement a new boundary condition. I don't think this type of BC exists as of yet. However, I would search the forum thoroughly before doing anything else.
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