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Simulate free convection

How to simulate free convection of a body enclosed inside a box?

I want to simulate convective heat transfer for a small sphere that is enclosed within a box containing air at high pressure.

How to do this? How to define air pressure inside the box?



Re: Simulate free convection

Hi, Mrinal_Mani! 


I met the same problem as you did here. Have you got the solution to this problem?


I have no idea to set resonable flow boundary conditions to describe such free convection in limited chamber.


Thanks so much for any clues.



Re: Simulate free convection

One way to do that is to initialize the pressure. Go to Home --> Loads and Conditions --> Constraints --> Initial Conditions to set the initial pressure of the air domain.