[CellZone]

Hi,

I am working with StarCCM and I am wondering, how the boundary heat flux at a wall is calculated:

So I know that in the background I have an energy equation which needs to be fullfilled for each cell.

To calculate the heat flux for convection, I need a heat transfer coefficient, which I can more or less define random, depending on the reference temperature with htc=q/(T_Wall - T_Ref) .

So StarCCM let's me calculate the htc by this. But I am wondering, how StarCCM is calculating q and T_Wall .

According to my understanding, to fullfill the energy equation at a wall, the energy equation must work with some pre-defined htc, which is a term of definition (Nusselt, Prandtl - number) ?

So all in all, I don't know how I can calculate the convective heat flux (and htc) because it's all about of my own definition?

I always thought the energy equation works without assumptions fot htc and could generate me real heat fluxes

Does anyone understand my problem?

Thank you!