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Treating Contact Resistance between two solids in openFoam (Thermal and electric)

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Old   January 9, 2023, 05:25
Default Treating Contact Resistance between two solids in openFoam (Thermal and electric)
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Andi
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I am trying to simulate a simple bar (region1 "R1" copper) which is connected with another bar ("R2" copper)

in the first step i would like to simulate only heattransfer from one side (400K) to the other side (300K) (rest is adiabat)

In the second step i would also account joule heating including an electric contact resistance.

for validation i used to do the simulation with and without resistance and also using only one region of copper for the whole bar....so no interface is present

solver: chtMultiRegionSimpleFoam

for the interface boundary condition i used: compressible::turbulentTemperatureCoupledBaffleMix ed

i was trying to emulate the resistance of contact with kappaLayer setting but if i compare my results with theory i would conclude that there is something wrong with my results. Has anyone any idea or experiance with contact resistance between solids in openfoam?


I am using the esi version v2112.
Attached Images
File Type: png copper bar.PNG (60.1 KB, 15 views)
File Type: jpg theory_contactresistance.jpg (154.4 KB, 19 views)
File Type: jpg wrongresult.jpg (32.2 KB, 17 views)
File Type: png boundary_interface.PNG (17.5 KB, 15 views)

Last edited by meshingpumpkins; January 9, 2023 at 06:50.
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Old   January 13, 2023, 06:56
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Andi
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dear all!

i went to foundation version 9 and the results are like they should be compared to theory....

so there is some difference between esi and foundation with using
kappalayers.
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File Type: jpg resistance_foundationversion.jpg (39.2 KB, 15 views)
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chtmultiregion, contact resistance, interface, jouleheating, openfoam

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