.AixLib.Fluid.MassExchangers.MembraneBasedEnthalpyExchangers.BaseClasses.Functions.DiffusionCoefficient

Information

The function calculates the diffusion coefficient of a medium 1 into medium 2. Therefore the collision diameters of medium 1 and 2 σ₁, σ₂ and the collision integral Ω are used as inputs.

σ₁₂ = (σ₁ + σ₂) ⁄ 2

Ω₁₂ = σ²₁₂ Ω

D₁₂ = 1.8583 10^(-7) T^{3 ⁄ 2} ⁄ (p Ω₁₂) √(1 ⁄ M₁ + 1 ⁄ M₂)

Interface

function DiffusionCoefficient
  input Modelica.Units.SI.MolarMass M_1 "molar mass of component one";
  input Modelica.Units.SI.MolarMass M_2 "molar mass of component two";
  input Modelica.Units.SI.Temperature T "temperature in K";
  input Modelica.Units.SI.Pressure p "pressure in atm";
  input Real sigma1 "collision diameter component 1";
  input Real sigma2 "collision diameter component 2";
  input Real omega "CollisionIntegral";
  output Modelica.Units.SI.DiffusionCoefficient D_12 "diffusion coefficient of component two in one";
end DiffusionCoefficient;

Revisions

• June 15, 2018, by Martin Kremer:
  First implementation.