Is there any way to simulate porous media with this software?
No, there is currently no way to simulation porous media in Caedium. It is something I am looking in to, but I can't give any timeline as to when Caedium might support it.
What kind of application do you want to simulate?
I would like to simulate HVAC-components, e.g. finned tube heat exchangers. Such components cause a pressure drop in the
To simulate the finned walls on a small number of tubes and the flow over them you could try using Physics:Wall->Type->nut = Continuous Rough Wall Function, with Ks = Sand-grain roughness height, where a rough wall is represented by Ks > 0.
Though, if you have a pack of many tubes in a finned enclosure, such as the radiator on a car, then the porous media approach is the only viable option.