Modification to taken account of buoyancy when gas with a lower density is at the bottom of the opening.

Removal of reference to state.X in openings to be able model Medias without the mass fraction in their ThermodynamicState record

Dymola compatibility: Correction of wrong statement when redeclaring a class (replaceable instead of redeclare)

Better handling of initialisation by addition of the massDynamic parameter . The velocity can be initialised with a parameter value or with a steady state condition.
Modification of the mass conservation equation by selecting a steady state or inertial flow by setting the massDynamic parameter

Addition of the regStep function in the Enthalpy flow calculation to reinforce numerical convergence

dp_friction = f(Vel)
dp - dp_friction = d * L * der(Vel)

Correction in the pressure reconstruction. Only the density of the gas phase must be used to compute the pressure.

Removal of the Mass Fractions reconstruction since state vectors are computed and mass fractions are constained in the state vector

Modification in the 'port_a.H_flow' calculation. The smooth operator is use with a continuity at dp=0

- Correction of the function used to be density temperature explicit rather than pressure temperature
- Addition of the protected parameter 'dp_small' to adjust the threshold value for which the polynomial interpolation on the mass flow rate calculation is performed.

Update of the description to explain the configuration when both static pressure difference and buoyancy pressure difference occurs

Modification to add an assertion to inform the user when the flow becomes compressible via the calculation of the Mach number

Correction to take account that the flow by buoyancy does not occur when the static pressure difference is high enough to already induces a one dimensional flow