Problem of heat flow with chtmultiregionFoam and buoyantPimpleFoam
 

Greetings to all,

I am currently trying to simulate a flow on an industrial model. There is several materials used in this case (Aluminium, Fluid, Plastic...). There is an inlet and a outlet in the fluid domain, which is directly stuck to solid boundaries. The fluid going through the inlet is hotter than the initial field. I have tried to use chtMultiRegionFoam but there is a problem in my results.

In fact, the velocity field is good but the temperature doesn't spread through the fluid. I can only see a hot layer near to the boundaries.

I have tried too to only simulate the fluid part, putting adiabatic boundaries instead of solid ones. I use for it the solver buoyantPimpleFoam, but the problem is the same.
My main problem is that is a confidential job, and i can't give you my files following the contract.

So does anybody recognize something in my problem?
I can answer to your questions about my parameters. I think there is a problem of conductivity, but how can i verify it ?

Thank you to those who have read all my message.

Laurent