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turbulentHeatFluxTemperature patch in 1.6

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Old   August 10, 2009, 15:02
Default turbulentHeatFluxTemperature patch in 1.6
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Ulrich Heck
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Hi,

there seems to be a very interesting new patch derived patch in OpenFoam 1.6 the “turbulentHeatFluxTemperature” patch. It seems to adapt the temperature to establish a prescribed heat flux. Does anybody know how to use it for the incompressible and compressible (rho*) solvers? Does there already exist some experience with this patch?

Thanks in advance!

Ulrich
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Old   February 2, 2010, 08:47
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Marco Müller
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Hi,

I would be thankful too for information to this bc...

Marco
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Old   February 2, 2010, 10:15
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Hi all,

here is the link. You have to modify it for the 1.6-version of OF.
http://openfoamwiki.net/index.php/Contrib_wallHeatFlux
If you use buoyantBoussinesqSimpleFOAM solver you have to change the kappa- to alpha-field.

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Old   February 2, 2010, 10:21
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Marco Müller
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Hi Thomas,

thanks for the link, but the BC is already present in of-1.6. Why should I implement the other one? Any information, about what the bc:
turbulentHeatFluxTemperature
exactly does, appreciated!

Thanks
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Old   February 2, 2010, 10:38
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Hi Marcio,

I didn't know about that fact of the heatfluxbc in OF-1.6. But I don't have a computer with OF at the moment, so I can't check if the bc's do the same...

But here is a link to a forum discussion about this theme, too.
HeatFlux in buoyantBoussinesq

Regards Thomas
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Old   February 2, 2010, 10:55
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Marco Müller
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Hi again,

thanks for the link, lets see if I get it right:

1. the solver calculates a (local?) alphaEff based on flow characteristics and turbulence model.
2. based on the defined heat flux value of the BC the temperature gradient is evaluated.

-> The heat flux is constrained and the temperature differs locally depending on flow characteristics?!

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Old   February 2, 2010, 15:52
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Ulrich Heck
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Hello Thomas, hello Marco,

maybe this modification also helps:

Bug in turbulentHeatFluxTemperatureFvPatchScalarField; OF 1.6.x

I also noticed that there seem to be some changes in the keywords in one of the last git-update (1.6.x) for this patch.

Best regards

Ulrich
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