Thermodynamic and physical properties

NeqSim calculates and return thermodynamic and physical properties using the following methods:

1. Calculation of properties for a fluid.

Thermodynamic properties of a fluid is calculated when calling the fluid.init(2) method, and can then be read using the functions:

enthalpy = fluid.getEnthalpy();entropy = fluid.getEntropy(); numberOfPhases = fluid.getNumberOfPhases(); mixMolarVolume = 1.0 / fluid.getDensity("mol/m3"); mixDensity = fluid.getDensity("kg/m3"); mixZfactor = fluid.getZ(); mixEnthalpy = fluid.getEnthalpy("Jmol"); mixEntropy = fluid.getEntropy("JmolK"); mixCp = fluid.getCp("J/molK"); mixCv = fluid.getCv("J/molK"); mixKappa = fluid.getKappa(); mixViscosity = fluid.getViscosity("kg/msec"); mixThermalConductivity = fluid.getConductivity("W/mK");`

2. Calculation of properties for a given phase for a fluid.

Thermodynamic properties of a phase in a fluid is calculated when calling the fluid.init(2) method, and can then be read using the functions listed below. Valid phase names are: "gas", "oil", "aqueous".

phaseNumber = fluid.getPhaseNumberOfPhase("gas"); gasFractionc(c) = fluid.getMoleFraction(phaseNumber) * 100; gasMolarVolume(c) = 1.0 / fluid.getPhase(phaseNumber).getDensity("mol/m3"); gasVolumeFraction(c) = fluid.getCorrectedVolumeFraction(phaseNumber) * 100; gasDensity(c) = fluid.getPhase(phaseNumber).getDensity("kg/m3"); gasZ(c) = fluid.getPhase(phaseNumber).getZ(); gasMolarMass(c)= fluid.getPhase(phaseNumber).getMolarMass() * 1000; gasEnthalpy(c) = fluid.getPhase(phaseNumber).getEnthalpy("J/mol"); gasWtFraction(c) = fluid.getWtFraction(phaseNumber) * 100; gasKappa(c) = fluid.getPhase(phaseNumber).getGamma(); gasViscosity(c) = fluid.getPhase(phaseNumber).getViscosity("kg/msec"); gasThermalConductivity(c) = fluid.getPhase(phaseNumber).getConductivity("W/mK"); gasSoundSpeed(c) = fluid.getPhase(phaseNumber).getSoundSpeed(); gasJouleThomsonCoefficient(c) = fluid.getPhase(phaseNumber).getJouleThomsonCoefficient() / 1e5;