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Applying Heat Flux out of the surface in CFX

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Old   February 25, 2009, 20:32
Default Applying Heat Flux out of the surface in CFX
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Ijaz
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How can we apply negative heat flux on a wall boundary in CFX?
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Old   February 25, 2009, 21:04
Default Re: Applying Heat Flux out of the surface in CFX
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Rikio
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Ljaz´╝î

You can set lower environment temperature to let heat flow out of the wall boundary... Wish help...

Rikio
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Old   February 26, 2009, 01:06
Default Re: Applying Heat Flux out of the surface in CFX
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Ijaz
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Thanks Rikio. The temperature at the boundary in question is not uniform. Therefore, applying a convective heat transfer coefficient in conjunction with a lower environment temperature would not ensure the flux value that I want to apply. I have tried applying a negative heat flux, but it results in non-physical results. In a software like CFX, there must be a way to apply negative flux. I would appreciate any suggestions from some experienced user.
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Old   February 26, 2009, 17:33
Default Re: Applying Heat Flux out of the surface in CFX
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Glenn Horrocks
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Hi,

CFX can handle negative heat fluxes just as well as positive ones. Sounds like you either have an inaccurate simulation or the negative heat flux you applied is non-physical.

Glenn Horrocks
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