Summary: Enable Boussinesq approximation for natural convection simulations.
Flag
BousOn A
A = 1: (On) = the Boussinesq approximation is applied to the momentum equations
A = 0: (Off) = the fluid density is allowed to vary with the temperature
Description
This flag enables the Boussinesq approximation in the momentum equations for natural convection. This is useful for simulating the of heating a cold device in a warm environment.
Make sure the environment setting for the air material is Fixed. Additionally, set the Environment temperature to be the hot temperature in the model. In some cases it is also helpful to specify a velocity initial condition throughout the flow field.