Thermal expansivity
 

I am solving the problem about natural convection. I have set that there is the buoyancy effect when I define fluid model. I choose 'Air Ideal Gas' as the domain fluid. When I tried to modify some property of the template fluid, I found that in 'buoyancy property' of ideal gas the thermal expansivity is not specify explicitly. I would like to know that if I choose template 'Air Ideal Gas' as the domain fluid, and CFX have to use thermal expansivity in computation, what value of thermal expansivity will be used? Thank you.

Atit

Re: Thermal expansivity
 

When using an ideal gas, the full buoyancy model is automatically set. Thermal expansivity is used only for the Boussinesq buoyancy model.