reg porous wall

Prakash

Dear sir

I am in need of help regarding how to give porous wall in my case. kindly clarify the same.

If the room is having one opeining as window. the opening is closed by means of porous screen (insect proof screen).due to this screen the air entering into the room is reduced. the flow of air accross the window is due to bouyancy force. as the boundary coditions, i gave heat generation to the floor, temperature to the wall and roof and atmospheric pressure at the window inlet and outflow condition to the outlet of window. how the screen is specified at the window. pleasy give the suggestion. and if any tutorial exercise is available kindly send it. Thank you very much D.Prakash