7.6.4.2.6. Compressible_Boussinesq

Syntax: Density [{of} SpeciesName] = Compressible_Boussinesq (Ref_Density = ref_density | Alpha = alpha | Ref_Pressure = ref_pressure | [Ref_Temperature = ref_temperature])
Scope: Aria Material
Summary: A compressible Boussinesq model for the density
Description: $\rho = \rho_\text{ref} * (1 + \alpha(P - P_\text{ref})) + \rho_T$

If the model does not specify the temperature then $\rho_T = 0$ , if it does then the “REF_TEMPERATURE” parameter must be provided for this model, and a model for the isobaric compressibility, $\beta$ , must also be present in the material definition and $\rho_T = \rho_\text{ref} * \beta * (T - T_\text{ref})$ .