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OpenFOAM Version 5 vs 6 with respect to chtMultiRegionFoam |
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February 27, 2019, 01:36 |
OpenFOAM Version 5 vs 6 with respect to chtMultiRegionFoam
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#1 | ||
Member
Adam
Join Date: Nov 2018
Posts: 36
Rep Power: 8 |
I've been having an issue with multiPhase heat transfer in solid (see this thread) and now I'm wondering if it's an issue with the version of OpenFOAM.
In the v5 user guide it says: Quote:
Quote:
Does this mean that I need to be using OpenFOAM v6 in order to look at heat transfer across solid-solid interfaces (with and without thermal resistances)? |
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February 27, 2019, 14:23 |
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#2 |
Member
Robin Kamenicky
Join Date: Mar 2016
Posts: 74
Rep Power: 11 |
Hi Adam,
I have had a quick look at the solvers. I think that both of them are capable to deal with solid-solid interface. multiRegionHeater tutorial in of-5 calculates solid-solid interface. I have checked a bit the codes. I have not noticed any crucial difference for solid-solid interface. In my opinion, the type of the interface is only dealt by BC. Which do you use? I have not had a look at your case setup. Kind regards, Robin |
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February 28, 2019, 01:36 |
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#3 | |
Member
Adam
Join Date: Nov 2018
Posts: 36
Rep Power: 8 |
Quote:
I have been following the multiRegionHeater tutorial to see how to set up my case. I have defined in 0/matrix/T Code:
boundaryField { matrix_to_fibres { type compressible::turbulentTemperatureCoupledBaffleMixed; value uniform 300; Tnbr T; kappaMethod solidThermo; } ... } Code:
boundaryField { fibres_to_matrix { type compressible::turbulentTemperatureCoupledBaffleMixed; value uniform 300; Tnbr T; kappaMethod solidThermo; } ... } If I add the following lines, I get an exchange between the two phases. However, they do not tend towards a reasonable limiting case, I describe a few of my results in this thread. Code:
thicknessLayers (1e-2); kappaLayers (1); |
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March 2, 2019, 11:47 |
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#4 |
Member
Robin Kamenicky
Join Date: Mar 2016
Posts: 74
Rep Power: 11 |
Hi Adam,
I have answered you in the other thread. It is good to notice that the BC just evaluates the temperature for given region. If you define layer thickness then it uses: Code:
contactRes = thicknessLayers/kappaLayers contactRes = 1.0/contactRes nbrKDelta = contactRes Code:
nbrKDelta = kappa_nbrField*distance_cells_on_both_sides Code:
valueFracion = nbrKDelta/(nbrKDelta+myKDelta) I have a few ideas, what could be the problem but I need the log file or possibly try to run it myself. Hope this helps somehow. Kind regards, Robin |
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