MODELING MULTICOMPONENT REACTIVE CHEMICAL-TRANSPORT IN NONISOTHERMAL UNSATURATED SATURATED SOILS .1. MATHEMATICAL-MODEL DEVELOPMENT

Authors
Citation
G. Wu et St. Chieng, MODELING MULTICOMPONENT REACTIVE CHEMICAL-TRANSPORT IN NONISOTHERMAL UNSATURATED SATURATED SOILS .1. MATHEMATICAL-MODEL DEVELOPMENT, Transactions of the ASAE, 38(3), 1995, pp. 817-826
Citations number
32
Categorie Soggetti
Engineering,Agriculture,"Agriculture Soil Science
Journal title
ISSN journal
00012351
Volume
38
Issue
3
Year of publication
1995
Pages
817 - 826
Database
ISI
SICI code
0001-2351(1995)38:3<817:MMRCIN>2.0.ZU;2-5
Abstract
A set of coupled equations has been developed to describe the simultan eous transport of water, heat, and multicomponent reactive chemicals i n saturated/unsaturated subsurface soils. The water movement equation takes into account vapor transport in the unsaturated zone, as well as the fluxes caused by the gradients of temperature and solute concentr ations. The heat transfer equation includes the components of heat con duction and latent heat transfer A phase conversion factor is used to simplify the hear transfer equation, as introduced by Luikov (1966). T he chemical transport equations are formulated in terms of the total a nalytic concentrations of all aqueous components. These equations are identical inform and can be solved one by one to save computer CPU sto rage. Chemical reactions which can be dealt with in this model include complexation, acid base reaction, ion exchange, and precipitation-dis solution.