[blackbow20]

Dear board members


I'm currently simulating an experimental fuel cell setup and looking for a proper boundary condition for considering the insulation around the cell. To simplify the situation, let's compare it to this insulated pipe:
12052497.png


In this setup i have two domains:

- Air domain (fluid)
- Pipe (solid)


I don't want to include the heat flux through the insulation layer into the simulation. So i'm looking for a proper boundary condition at the outer wall of the pipe. I know the thermoconductivity and heat capacity of the insulation material. As far as i understand, the heat transfer is strongly dominated by heat conduction. But in CFX i could only find a option to set a heat transfer coefficient as a BC. But for this problem this doesn't seem to be right.


How would you do this? Any propositions?


Thanks and regards,

blackbow

[Gert-Jan]

Don't use external links in your queries. Not all people will open these.

To understand how to post images on this forum, read this:
https://www.cfd-online.com/Wiki/Ansy...n_the_forum.3F

[blackbow20]

Originally Posted by Gert-Jan

Don't use external links in your queries. Not all people will open these.

To understand how to post images on this forum, read this:
https://www.cfd-online.com/Wiki/Ansy...n_the_forum.3F

Done, thanks for the hint.

[Opaque]

Are you familiar with heat transfer modeling? Do you understand the differences/relations between Dirichlet (value), Neumann (flux), and Robin (flux transfer coefficient) type of boundary condition?

If you understand the relationships between them, and how to reduce a problem from 3D->2D->1D->BC, you will realize what the next step is.

Give it a thought for a moment.

Good luck