One linear system for two mesh regions

koala · August 19, 2016, 11:05

Hey,

I have a question about coupling two regions. Let's say I've connected regions A and B. I want to solve the same equation on both meshes. I can't merge the two meshes because there are additional equations solved on only one of the meshes.

Is it possible to create only one linear system for both meshes? So a coupling boundary between these meshes wouldn't be necessary. Or is there any useful coupling BC (scalar and vector) for this case?

Thanks in advance for your help!

Zeppo · August 19, 2016, 11:50

conjugateHeatFoam from foam-extend migh be what you are looking for:
https://sourceforge.net/p/openfoam-e...ugateHeatFoam/
http://www.tfd.chalmers.se/~hani/kur...ssonReport.pdf
http://www.cfd-online.com/Forums/ope...am-solver.html

koala · August 19, 2016, 14:10

Thanks, that looks promising but unfortunately it's included in foam-extend and not OpenFOAM. Some experience in porting it to OpenFOAM or is there something similar in OpenFOAM?

Zeppo · August 19, 2016, 14:58

AFAIK, there's no analog of conjugateHeatFoam in OpenFoam.

anishtain4 · August 24, 2016, 12:58

You can use parts of the FOAM-ext along with your original foam (if the dependencies are not too much).

try this link:
http://www.tfd.chalmers.se/~hani/kur...rtReviewed.pdf

It shows you how to port a BC from ext, also is a famous tutorial on how to add T to cavity case. Having these two you should be able to get conjugateHeatFoam on your current version.

August 19, 2016, 11:05	One linear system for two mesh regions	#1
koala New Member Join Date: Oct 2014 Posts: 13 Rep Power: 11	Hey, I have a question about coupling two regions. Let's say I've connected regions A and B. I want to solve the same equation on both meshes. I can't merge the two meshes because there are additional equations solved on only one of the meshes. Is it possible to create only one linear system for both meshes? So a coupling boundary between these meshes wouldn't be necessary. Or is there any useful coupling BC (scalar and vector) for this case? Thanks in advance for your help!

August 19, 2016, 11:50		#2
Zeppo Senior Member Sergei Join Date: Dec 2009 Posts: 261 Rep Power: 21	conjugateHeatFoam from foam-extend migh be what you are looking for: https://sourceforge.net/p/openfoam-e...ugateHeatFoam/ http://www.tfd.chalmers.se/~hani/kur...ssonReport.pdf http://www.cfd-online.com/Forums/ope...am-solver.html koala likes this.

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August 19, 2016, 14:10		#3
koala New Member Join Date: Oct 2014 Posts: 13 Rep Power: 11	Thanks, that looks promising but unfortunately it's included in foam-extend and not OpenFOAM. Some experience in porting it to OpenFOAM or is there something similar in OpenFOAM?

August 19, 2016, 14:58		#4
Zeppo Senior Member Sergei Join Date: Dec 2009 Posts: 261 Rep Power: 21	AFAIK, there's no analog of conjugateHeatFoam in OpenFoam.

August 24, 2016, 12:58		#5
anishtain4 Senior Member Mahdi Hosseinali Join Date: Apr 2009 Location: NB, Canada Posts: 273 Rep Power: 18	You can use parts of the FOAM-ext along with your original foam (if the dependencies are not too much). try this link: http://www.tfd.chalmers.se/~hani/kur...rtReviewed.pdf It shows you how to port a BC from ext, also is a famous tutorial on how to add T to cavity case. Having these two you should be able to get conjugateHeatFoam on your current version.