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Assigning Temperature at wall boundary

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Old   August 13, 2012, 00:26
Default Assigning Temperature at wall boundary
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Syavash
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Hi Guys,

Does anybody know how to assign specific temperatures to wall boundary faces at each time step? The temperature value at each face is distinct and doesn't obey any particular instructions. So I don't think can make this by Define_Profie.
Any Idea? I really need to know wether it's possible.

tnx.
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Old   August 13, 2012, 02:40
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What do you mean "doesn't obey any particular instruction"?
If you don't have any rule to set the value of the temperature, then there is no need to set up a simulation

If you have any specific rule, this can be done with Define_Profile, even for time-dependent simulations.
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Old   August 13, 2012, 09:39
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Hi flotus,
Tnx for replying.
Actually temperature for each face is obtaind by exerting an inner loop, depending on someparameters like htc etc. Thus temperature for each node is changing at every time step. What do you think? Is there Any solution possible for this case?
Tnx for caring about this issue.
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Old   August 13, 2012, 11:06
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The implementation with a UDF should be straightforward.
Could you be a bit more specific about the way the temperatures are to be calculated?
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Old   August 13, 2012, 14:19
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Quote:
Originally Posted by flotus1 View Post
The implementation with a UDF should be straightforward.
Could you be a bit more specific about the way the temperatures are to be calculated?
Tnx for your response.
Assume a wall boundary that has a temperature distribution T. At each face or node, temperature should be calculated within a loop at each time step. The procedure of calculating temperature is implicit and it depends mostly on convective heat transfer coeff. of the same face. After obtaining temperature of all faces, we should apply it to wall boundary and this process continues until desired time reached.
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