Dumux::BinaryCoeff::H2O_Air Class Reference

Binary coefficients for water and air. More...

#include <dumux/material/binarycoefficients/h2o_air.hh>

Description

Binary coefficients for water and air.

Static Public Member Functions
template<class Scalar >
static Scalar	henry (Scalar temperature)
	Henry coefficient \(\mathrm{[Pa]}\) for air in liquid water. More...
template<class Scalar >
static Scalar	gasDiffCoeff (Scalar temperature, Scalar pressure)
	Binary diffusion coefficient \(\mathrm{[m^2/s]}\) for molecular water and air. More...
template<class Scalar >
static Scalar	liquidDiffCoeff (Scalar temperature, Scalar pressure)
	Diffusion coefficient \(\mathrm{[m^2/s]}\) for molecular nitrogen in liquid water. More...

Member Function Documentation

gasDiffCoeff()

template<class Scalar >

static Scalar Dumux::BinaryCoeff::H2O_Air::gasDiffCoeff ( Scalar  temperature, Scalar  pressure  )

inlinestatic

Binary diffusion coefficient \(\mathrm{[m^2/s]}\) for molecular water and air.

Parameters

temperature	the temperature \(\mathrm{[K]}\)
pressure	the phase pressure \(\mathrm{[Pa]}\) Vargaftik: Tables on the thermophysical properties of liquids and gases. John Wiley & Sons, New York, 1975. [70] Walker, Sabey, Hampton: Studies of heat transfer and water migration in soils. Dep. of Agricultural and Chemical Engineering, Colorado State University, Fort Collins, 1981. [73]

henry()

template<class Scalar >

static Scalar Dumux::BinaryCoeff::H2O_Air::henry ( Scalar  temperature )

inlinestatic

Henry coefficient \(\mathrm{[Pa]}\) for air in liquid water.

Parameters

temperature

the temperature \(\mathrm{[K]}\)

Henry coefficient See: Stefan Finsterle (1993, page 33 Formula (2.9)) [22]
(fitted to data from Tchobanoglous & Schroeder, 1985 [68] )

liquidDiffCoeff()

template<class Scalar >

static Scalar Dumux::BinaryCoeff::H2O_Air::liquidDiffCoeff ( Scalar  temperature, Scalar  pressure  )

inlinestatic

Diffusion coefficient \(\mathrm{[m^2/s]}\) for molecular nitrogen in liquid water.

Lacking better data on water-air diffusion in liquids, we use at the moment the diffusion coefficient of the air's main component nitrogen!!

Parameters

temperature	the temperature \(\mathrm{[K]}\)
pressure	the phase pressure \(\mathrm{[Pa]}\)

The empirical equations for estimating the diffusion coefficient in infinite solution which are presented in Reid, 1987 all show a linear dependency on temperature. We thus simply scale the experimentally obtained diffusion coefficient of Ferrell and Himmelblau by the temperature.

See: R. Reid et al. (1987, pp. 599) [59]
R. Ferrell, D. Himmelblau (1967, pp. 111-115) [21]

---

The documentation for this class was generated from the following file:

• h2o_air.hh