Vapor

The vapor is assumed to obey a gas law of the form:

where:

• n is the amount of the vapor in [moles]

• Ru is the universal gas constant: Ru = 8.3145 [J/mol/K]

• m is the mass of vapor [kg]

• M is the molecular mass of vapor [kg/mol]

We introduce the effective molecular mass of vapor emm in [g/mol]. This is a Simcenter Amesim parameter that the user has to define. We have:

We compute density of vapor at and

Here, Tvap is the corrected temperature at pressure :

We correct the density to current pressure P and temperature T assuming an adiabatic behavior:

Equation 7: Density of vapor at P and T

The vapor is a polytropic fluid, then from Equation 4 the bulk modulus of vapor is: