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March 18, 2014, 08:38 |
Coupled Heat Transfer (cond., rad.)
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#1 |
New Member
Join Date: Sep 2013
Location: Germany
Posts: 18
Rep Power: 13 |
Hi,
I'm new to OpenFOAM and I was able to set up some simple fluid dynamic cases with ico..,piso.. Foam. But now I have to build up some more complicated cases with coupled heat transfer (steady state). The parts of my cases I have to study are surrounded by vacuum. Only radiative and conductive HT has to be solved (with viewFactor Methode). I'm stucking with the tutorial files. It is very difficult to find a explanation for a simple case to start with. Can someone help me to orientate. As far as I know the following solvers are used for the tutorial cases. -buoyantBoussinesqPimpleFoam -buoyantBoussinesqSimpleFoam -buoyantPimpleFoam -buoyantSimpleFoam -chtMultiRegionFoam -chtMultiRegionSimpleFoam For steady-state should be *SimpleFoam a good solver. But whichone ? Other "normal" heat diffiusion problems have been solved with lagrangianFoam. As you can see I'm quite confused. According to the doc's the viewFactor Methode is new and the most Tutorials are outdated or based on diy solvers. e.g. http://www.tfd.chalmers.se/~hani/kur...Foam_final.pdf In this forum I found a similiar case but he used P1 and fvDOM: http://www.cfd-online.com/Forums/ope...n-problem.html But it confuses me even more and then there is this new baffle boundary... I would be really glad for any help or example data's etc. Best Regards, Alex |
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March 26, 2014, 04:45 |
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#2 |
New Member
Join Date: Sep 2013
Location: Germany
Posts: 18
Rep Power: 13 |
...I don't like pushing threads. But unfortunately I need your help. Please give me some Info's ...or plain working data.
Thanks |
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March 26, 2014, 05:28 |
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#3 |
Senior Member
Paritosh Vasava
Join Date: Oct 2012
Location: Lappeenranta, Finland
Posts: 732
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If you are looking for steady state conjugate heat transfer chtMultiRegionSimpleFoam is the solver for you. The tutorials seem to have some radiation files but I am not sure how they work. I have never used them.
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March 26, 2014, 10:14 |
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#4 |
New Member
Join Date: Sep 2013
Location: Germany
Posts: 18
Rep Power: 13 |
Hi Paritosh,
thank you very much for your reply. Actually I m trying to modify this case http://www.cfd-online.com/Forums/ope...n-problem.html With minor success. From fvDOM to viewFactors. And yes your right, the chtMultiRegionSimpleFoam has viewFactors implemented. But the "multiple" Regions makes it difficult to understand which parameters are important and which are not neccessary or even their purpose is often unclear. The C++ Guide helps to orientated....but it is on an advanced lvl. My modifikation faceAgglomeration works without error. But then viewFactorGen does not work. Crashs with the errormsg: Create mesh for time = 0 Total number of coarse faces: 40 *** Error in `viewFactorsGen': free(): invalid next size (normal): 0x00000000022f76a0 *** ...... Maybe someone has an idea ? Best regards, Alex |
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conduction-radiation, heat transfer boundary, viewfactor |
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