Numerical modeling of steam injection for the removal of nonaqueous phase liquids from the subsurface. 1. Numerical formulation
- Univ. of California, Berkeley (United States)
A multidimensional integral finite difference numerical simulator is developed for modeling the steam displacement of nonaqueous phase liquid (NAPL) contaminants in shallow subsurface systems. This code, named STMVOC, considers three flowing phases, gas, aqueous, and NAPL; and three mass components, air, water, and an organic chemical. Interphase mass transfer of the components between any of the phases is calculated by assuming local chemical equilibrium between the phases, and adsorption of the chemical to the soil is included. Heat transfer occurs due to conduction and multiphase convection and includes latent heat effects. A general equation of state is implemented in the code for calculating the thermophysical properties of the NAPL/chemical. This equation of state is primarily based on corresponding states methods of property estimation using a chemical's critical constants. The necessary constants are readily available for several hundred hazardous organic liquid chemicals. In part 2, the code is used to simulate two one-dimensional laboratory steam injection experiments and to examine the effect of NAPL properties on the steam displacement process.
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 5219316
- Journal Information:
- Water Resources Research; (United States), Journal Name: Water Resources Research; (United States) Vol. 28:2; ISSN 0043-1397; ISSN WRERA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
540220* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
ADSORPTION
CLEANING
COMPUTER CODES
DECONTAMINATION
ENERGY TRANSFER
ENVIRONMENTAL TRANSPORT
FLUID INJECTION
HEAT TRANSFER
MANAGEMENT
MASS TRANSFER
MATERIALS RECOVERY
MATHEMATICAL MODELS
ORGANIC COMPOUNDS
PROCESSING
REMEDIAL ACTION
S CODES
SORPTION
STEAM INJECTION
SUBSURFACE ENVIRONMENTS
WASTE MANAGEMENT
WASTE PROCESSING