fuellib.correlate.components.diffusion_coeffs_wilke

fuellib.correlate.components.diffusion_coeffs_wilke(fuel, p, T, *, sigma_gas=Quantity(3.62, 'angstrom'), epsilonByKB_gas=Quantity(97.0, 'kelvin'), MW_gas=Quantity(0.02897, 'kilogram / mole'), correlation='Tee')

Compute diffusion coefficients using Lennard-Jones parameters.

Uses Wilke and Lee method (Poling, equation 11-4.1). Ambient gas defaults to air parameters.

Parameters:

  • fuel (Fuel) – Fuel object.

  • p (Quantity[float]) – Pressure to compute property.

  • T (Quantity[float]) – Temperature to compute property.

  • sigma_gas (Quantity[float]) – Collision diameter. Default is 3.62 Angstroms.

  • epsilonByKB_gas (Quantity[float]) – Well depth over Boltzmann constant. Default is 97.0 K.

  • MW_gas (Quantity[float]) – Mean molecular weight of ambient gas. Default is 28.97 g/mol.

  • correlation (Literal['Tee', 'Wilke']) – Method to calculate sigma and epsilon (“Tee” or “Wilke”). Default is “Tee”.

Returns:

Diffusion coefficient in m^2/s.

Return type:

Quantity[ndarray[tuple[int]]]