Contact Surface for heat transfer in flux

Jerome Teoh

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.

Farid zidat_20516

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 

Farid zidat_20516

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 

Jerome Teoh

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.

Farid zidat_20516

Can you share the project Jerome please ?

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

 

Regards 

Jerome Teoh

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.

Farid zidat_20516

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 

Jerome Teoh

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?

Farid zidat_20516

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