Hi, I'm simulating a solar chimney attached to a cubic chamber, is a steady state simulation, i'm using the k-e RNG model, with full buyoancy effects and standard wall treatment, and the DO radiation model. The walls of the chamber are considered as adiabatic, the glass cover is semi-transparent, and the absorber plate is aluminium. The air inlet of the chamber is set as velocity inlet, normal to boundary and constant temperature, the top of the chimney is set as pressure outlet, the air is considered an ideal gas. Is a simple geometry, an hexa mesh, the quality is good. Since i'm working with student version the mesh is aprox 472000 elements.
How to know the calculation as convergerd? The residuals do not decrease.