Heat transfer (conduction) along a thin wall

nikoscham · June 13, 2023, 04:53

I am trying to implement a heat conduction model, in the planar direction of a thin wall. Unfortunately, I cannot mesh the thickness of the wall since the computational requirements would be enormous.

I am using the chtMultiRegionFoam solver (openFOAM v2012). I have a fluid (air) and a solid domain. In the boundary between them I use the turbulentTemperatureCoupledBaffleMixed boundary condition. A thin wall exists at the bottom of both regions (all the other external boundaries are insulated).

A simple schematic of what I want to do is presented here:

Do you think it is possible to implement a heat conduction along the thin wall in openFOAM (without meshing the thickness of wall)? A similar model (Shell Conduction) is available in FLUENT: https://www.afs.enea.it/project/nept...ug/node471.htm. I was thinking to use the turbulentTemperatureCoupledBaffleMixed bc (just like the boundary between the two domains). Does anyone has implemented this? Is there any other, more appropriate, boundary condition?

Thanks for your time!
Nikos

Zena27 · June 13, 2023, 06:19

Hello, If you can assume that you simulation is thin that it can be 2D, you can use the empty BC for the thickness walls. Also if it's so thin that you need to consider the thickness and work in 3D you can extrude the mesh in OpenFoam through extrudeMesh utility.

turbulentTemperatureCoupledBaffleMixed is actually so good, you just need to type the heat conduction coefficient between the wall and the air. You can actually check its implementation.

June 13, 2023, 04:53	Heat transfer (conduction) along a thin wall	#1
nikoscham Member Nikos Join Date: Aug 2012 Location: Greece Posts: 30 Rep Power: 14	I am trying to implement a heat conduction model, in the planar direction of a thin wall. Unfortunately, I cannot mesh the thickness of the wall since the computational requirements would be enormous. I am using the chtMultiRegionFoam solver (openFOAM v2012). I have a fluid (air) and a solid domain. In the boundary between them I use the turbulentTemperatureCoupledBaffleMixed boundary condition. A thin wall exists at the bottom of both regions (all the other external boundaries are insulated). A simple schematic of what I want to do is presented here: Do you think it is possible to implement a heat conduction along the thin wall in openFOAM (without meshing the thickness of wall)? A similar model (Shell Conduction) is available in FLUENT: https://www.afs.enea.it/project/nept...ug/node471.htm. I was thinking to use the turbulentTemperatureCoupledBaffleMixed bc (just like the boundary between the two domains). Does anyone has implemented this? Is there any other, more appropriate, boundary condition? Thanks for your time! Nikos Last edited by nikoscham; June 13, 2023 at 06:17.

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June 13, 2023, 06:19		#2
Zena27 Member Zeinab Join Date: Feb 2023 Posts: 32 Rep Power: 3	Hello, If you can assume that you simulation is thin that it can be 2D, you can use the empty BC for the thickness walls. Also if it's so thin that you need to consider the thickness and work in 3D you can extrude the mesh in OpenFoam through extrudeMesh utility. turbulentTemperatureCoupledBaffleMixed is actually so good, you just need to type the heat conduction coefficient between the wall and the air. You can actually check its implementation.