Hello Claire,
In convection, fluid properties (velocity field inclued) are used to calculate the convective coefficient h.
If you add a boundary condition with h fixed, then COMSOL does not need fluid properties.
You can estimate your convective coefficient by calculating the Nusselt's number (which is a function of Reynolds and Prandtl's numbers). Then add it to your boundary limit. That way, you do not need to modelize your fluid volume.
Else, you can modelize your fluid volume and use both HT and CFD physics.
Hope it will help you.
Benjamin
In convection, fluid properties (velocity field inclued) are used to calculate the convective coefficient h.
If you add a boundary condition with h fixed, then COMSOL does not need fluid properties.
You can estimate your convective coefficient by calculating the Nusselt's number (which is a function of Reynolds and Prandtl's numbers). Then add it to your boundary limit. That way, you do not need to modelize your fluid volume.
Else, you can modelize your fluid volume and use both HT and CFD physics.
Hope it will help you.
Benjamin
