free convection help

Hi!
i am Joseph from Spain, and i am trying to model free convection in a closed solar module, which is basically a closed box.

I downloaded your 2D headlamp , and i can see it is pretty similar except for the venting valve in the lower part of the lamp.

i havent run it, but i guess it doesnt work as that was what you said in the first message with the file attached.

MY question is, did you solve the problems with the initial conditions and variables?

Did you finally get to solve all of that? could you attach privately the final model so i can refine mine?

Thank you very much