Multiphase approach to the modeling of porous media contamination by organic compounds. I. Equation development
Journal Article
·
· Water Resour. Res.; (United States)
The infiltration and migration of a chemical contaminant in the subsurface is a complex process. A multiphase approach to the modeling of organic compound migration in the subsurface is presented. This comprehensive approach makes it possible to describe the simultaneous transport of a chemical contaminant in three physical forms: as a nonaqueous phase, as a soluble component of a water phase, and as a mobile fraction of a gas phase. Using volume-averaging theory, equations governing such migration were developed from basic conservation of mass principles for a two-component contaminating phase. Incorporated within these equations are the effects of matrix and fluid compressibility, gravity phase composition, interphase mass exchange, capillarity, diffusion, and dispersion. The resulting equations form a system of three nonlinear partial differential equations in five unknowns, two capillary pressures and three mass fractions. On the basis of the concept of local equilibrium between the phases, two constraints relating mass fractions were formulated to close this mathematical system. 34 references, 2 figures.
- Research Organization:
- Michigan Univ., Ann Arbor
- DOE Contract Number:
- AC02-79EV10257
- OSTI ID:
- 6432227
- Journal Information:
- Water Resour. Res.; (United States), Journal Name: Water Resour. Res.; (United States) Vol. 21:1; ISSN WRERA
- Country of Publication:
- United States
- Language:
- English
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Mon Dec 31 23:00:00 EST 1984
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Related Subjects
510200* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (-1989)
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
CONTAMINATION
ENVIRONMENTAL TRANSPORT
GROUND WATER
HYDROGEN COMPOUNDS
MASS TRANSFER
MATHEMATICAL MODELS
OXYGEN COMPOUNDS
POLLUTANTS
SOILS
SOLUTES
WATER
Terrestrial-- Chemicals Monitoring & Transport-- (-1989)
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
CONTAMINATION
ENVIRONMENTAL TRANSPORT
GROUND WATER
HYDROGEN COMPOUNDS
MASS TRANSFER
MATHEMATICAL MODELS
OXYGEN COMPOUNDS
POLLUTANTS
SOILS
SOLUTES
WATER