.Modelica.Media.IdealGases.Common.MixtureGasNasa.lowPressureThermalConductivity

Information

This function applies the Masson and Saxena modification of the Wassiljewa Equation for the thermal conductivity for gas mixtures of n elements at low pressure.

For nonpolar gas mixtures errors will generally be less than 3 to 4%. For mixtures of nonpolar-polar and polar-polar gases, errors greater than 5 to 8% may be expected. For mixtures in which the sizes and polarities of the constituent molecules are not greatly different, the thermal conductivity can be estimated satisfactorily by a mole fraction average of the pure component conductivities.

Interface

function lowPressureThermalConductivity
  extends Modelica.Icons.Function;
  input MoleFraction[:] y "Mole fraction of the components in the gas mixture";
  input Temperature T "Temperature";
  input Temperature[size(y, 1)] Tc "Critical temperatures";
  input AbsolutePressure[size(y, 1)] Pc "Critical pressures";
  input MolarMass[size(y, 1)] M "Molecular weights";
  input ThermalConductivity[size(y, 1)] lambda "Thermal conductivities of the pure gases";
  output ThermalConductivity lambdam "Thermal conductivity of the gas mixture";
end lowPressureThermalConductivity;