Defining different materials in a solid composition
 

Hello

Maybe this question seems basic, but i couldn't fnd a sufficient answer.
Is it possibe to define different materials for an assembly of parts, e.g. a circuit board (chips, transistors, PVC) for a single mesh region solver (e.g. buoyantBoussinesqSimpleFoam)?
It seems I can only define material properties of the air volume, but not the solids that are surface meshed.

Thanks

Hi,

if you are using the buoyant*Foam solvers, then you only model the fluid region. Hence, there is no possibility to add material properties of different solids. If you are really interested what 's going on in the solid's too, you can use the chtMultiRegion*Foam solver. Here you have to define the solid's separately and for each sold you can set different material properties as heat conductivity, heat capacity etc.

There are other ways like, meshing the fluid and solid within one mesh and set for the solids (all cells of the solids) some Darcy law (fvOptions) in order to stop the flow here. In addition you can then use set fields to set different properties but this is not the common way and if you have different small solids, its not the best workflow.

In the foamExtend version there is also a coupledCHT solver but I do not know whats the different.