activity_coefficient

despasito.thermodynamics.calc.activity_coefficient

activity_coefficient(P, T, xi, yi, Eos, **kwargs)[source]

Calculate activity coefficient given T, P, yi, and xi.

Parameters:

  • P (float) – [Pa] Pressure of the system

  • T (float) – [K] Temperature of the system

  • xi (numpy.ndarray) – Liquid mole fraction of each component, sum(xi) should equal 1.0

  • yi (numpy.ndarray) – Vapor mole fraction of each component, sum(xi) should equal 1.0

  • Eos (obj) – An instance of the defined EOS class to be used in thermodynamic computations.

  • kwargs – Keyword arguments for calc_saturation_properties()

Returns:

  • activity_coefficient (numpy.ndarray) – Activity coefficient for given composition of mixtures

  • Psat (numpy.ndarray) – Saturation pressure