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Contact Surface for heat transfer in flux

Hi,

Wonder is that a way to define contact surface in flux for heat transfer, if my element node is not equal on the surface?

Thanks,

Jerome.

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English

Flux

v2020.0

Accepted answers

fzidat

Hello Jerome;

If you have common face, it means that the mesh is shared by the two volumes, if not, it means that there is an airgap, otherwise, you have imported non conformal mesh, and Flux will not allow it.

Regards

All comments

fzidat

Hello Jerome;

In Flux you can use face region for convection or radiation, or even impose a temperature. So as a first answer i would say yes.

Regards

jerometeoh917

Thanks Farid.

My question is I would have a heatsink that touch my heated substrate.

However the heatsink elements (meshed) will not as fine as the substrate but they touch each other.

Wondering is it possible to ask the touching face as conduction without merging the node.

Regards,

Jerome.

fzidat

Can you share the project Jerome please ?

Or a scheme on what you want to do. It is not 100% clear to me.

Regards

jerometeoh917

Yes Farid,

as you can see I will induction heating the substrate, and I try to put heatsink material that touch the substrate to pull from heat away the substrate.

Ideally I was going to use tet mesh that is much coaser than the hex mesh in the substrate.

So, I am wondering is it possible to assign the surface that contact as conductive region (hopefully flux doesnt recognize it as a replicate face) without merge the node between two volume.

Best regards,

Jerome.

fzidat

Thanks Jerom!

If there is a contact, so there will be thermal conduction between the two bodies. If you want to use this common face as heat source, you can use the following face region:

I hope this will help you.

Regards

jerometeoh917

So is this apply to two bodies without matching nodes?

In this case (I have not import the mesh in flux yet), would be an issue of duplicate face or nodes?

fzidat

Hello Jerome;

If you have common face, it means that the mesh is shared by the two volumes, if not, it means that there is an airgap, otherwise, you have imported non conformal mesh, and Flux will not allow it.

Regards

Ovando_RBB

Hi there,

Another second option that you can implement is to select "yes" to faces stitching and "yes" to solid assembly at the moment that you import your geometry to Flux. This option will work as long as the substrate and heat sink are touching in your CAD model.

Hope this comment helps!