turbulentHeatFluxTemperature patch in 1.6

ulli · August 10, 2009, 15:02

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

marico · February 2, 2010, 08:47

Hi,

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

Marco

Thomas Baumann · February 2, 2010, 10:15

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.

Regards Thomas

marico · February 2, 2010, 10:21

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
Marco

Thomas Baumann · February 2, 2010, 10:38

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.
http://www.cfd-online.com/Forums/ope...oussinesq.html

Regards Thomas

marico · February 2, 2010, 10:55

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?!

Marco

ulli · February 2, 2010, 15:52

Hello Thomas, hello Marco,

maybe this modification also helps:

http://www.cfd-online.com/Forums/ope...eld-1-6-x.html

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

August 10, 2009, 15:02	turbulentHeatFluxTemperature patch in 1.6	#1
ulli Member Ulrich Heck Join Date: Mar 2009 Location: Krefeld, Germany Posts: 41 Rep Power: 17	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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February 2, 2010, 08:47		#2
marico Member Marco Müller Join Date: Mar 2009 Location: Germany Posts: 94 Rep Power: 17	Hi, I would be thankful too for information to this bc... Marco

February 2, 2010, 10:15		#3
Thomas Baumann Senior Member Join Date: Apr 2009 Location: Karlsruhe, Germany Posts: 103 Rep Power: 17	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. Regards Thomas

February 2, 2010, 10:21		#4
marico Member Marco Müller Join Date: Mar 2009 Location: Germany Posts: 94 Rep Power: 17	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 Marco

February 2, 2010, 10:38		#5
Thomas Baumann Senior Member Join Date: Apr 2009 Location: Karlsruhe, Germany Posts: 103 Rep Power: 17	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. http://www.cfd-online.com/Forums/ope...oussinesq.html Regards Thomas

February 2, 2010, 10:55		#6
marico Member Marco Müller Join Date: Mar 2009 Location: Germany Posts: 94 Rep Power: 17	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?! Marco

February 2, 2010, 15:52		#7
ulli Member Ulrich Heck Join Date: Mar 2009 Location: Krefeld, Germany Posts: 41 Rep Power: 17	Hello Thomas, hello Marco, maybe this modification also helps: http://www.cfd-online.com/Forums/ope...eld-1-6-x.html 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