I have a geometry where a fluid flowing in an interior domain cools the larger (parent, porous medium) domain. My question is how to set one of the boundaries of interior domain to have heat inflow and outflow? Comsol only allows me to set interior boundaries as insulated or open. Is there a way to simulate what I want?
Explanation of attached images: The small slit sized domain in 'geometry.png' is where the fluid flows. I've also attached an expanded view with BCs as 'conditions.png'.
Thanks :)