buoyantBoussinesqSimpleFoam Boundary Conditions
 

I am a beginner in OpenFoam. I am currently working on 'Simulation of Thermal Plume with off source heating'. I am done with the geometry and meshing. I am using buoyantBoussinesqSimpleFoam as steady state solver. I am not sure about the boundary conditions to be given. Can someone please suggest the boundary conditions for the INLET, BOTTOM, TOP and SIDES. (Case link is given below)

https://drive.google.com/folderview?...ms&usp=sharing

My boundary conditions and other case files are given in the link. But the solution diverges quickly:(. Please have a look and tell me the changes to be made.

Also, can anyone explain what is alphat and how is it a variable? I though it was thermal diffusivity.:confused:

Any help is appreciated. Tnx in advance.