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Binary coefficients for water and nitrogen. More...
#include <H2O_Air.hpp>
Static Public Member Functions | |
template<class Evaluation > | |
static Evaluation | henry (const Evaluation &temperature) |
Henry coefficent ![]() | |
template<class Evaluation > | |
static Evaluation | gasDiffCoeff (const Evaluation &temperature, const Evaluation &pressure) |
Binary diffusion coefficent ![]() | |
template<class Evaluation > | |
static Evaluation | liquidDiffCoeff (const Evaluation &temperature, const Evaluation &) |
Lacking better data on water-air diffusion in liquids, we use at the moment the diffusion coefficient of the air's main component nitrogen!! | |
Binary coefficients for water and nitrogen.
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inlinestatic |
Binary diffusion coefficent
temperature | the temperature ![]() |
pressure | the phase pressure ![]() |
Walker, Sabey, Hampton: Studies of heat transfer and water migration in soils. Dep. of Agricultural and Chemical Engineering, Colorado State University, Fort Collins, 1981.
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inlinestatic |
Henry coefficent
Henry coefficent See: Stefan Finsterle, 1993 Inverse Modellierung zur Bestimmung hydrogeologischer Parameter eines Zweiphasensystems (fitted to data from the book "Tchobanoglous & Schroeder: Water Quality: Characteristics", Addison-Wesley, 1985)
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inlinestatic |
Lacking better data on water-air diffusion in liquids, we use at the moment the diffusion coefficient of the air's main component nitrogen!!
Diffusion coefficent
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.: "The properties of Gases and Liquids", 4th edition, pp. 599, McGraw-Hill, 1987
R. Ferrell, D. Himmelblau: "Diffusion Coeffients of Nitrogen and Oxygen in Water", Journal of Chemical Engineering and Data, Vol. 12, No. 1, pp. 111-115, 1967