problem isulator

KDarinG

Hi, for everyone.

I hava a little problem, i´m trying to make a simulation about a steel depot with a hot fluid(370K) and its isulator (Polystyrene 30mm).

If you resolve the energy ecuation alone, never loose heat to outside¡¡¡¡¡(atmosferic air)

After that i made other model, with depot, air, polystyrene and air(outside), with K-E, gravity, buoyancy and boussinesq, i want to see the natural convection, but the problems are similars.

Thanks, and have a nice day.