NAPL: Simulator documentation. Research report, October 1992-September 1995

Technical Report · Wed Oct 01 04:00:00 EDT 1997

OSTI ID:565428

Guarnaccia, J; Pinder, G; Fishman, M

A mathematical and numerical model is developed to simulate the transport and fate of NAPLs in near-surface granular soils. The resulting three-dimensional, three phase simulator is called NAPL. The simulator accommodates three mobile phases: water, NAPL and gas, as well as water- and gas-phase transport of NAPL contaminants. The numerical solution algorithm is based on a Hermite collocation finite element discretization. Particular attention has been paid to the development of a sub-model that describes three-phase hysteretic permeability-saturation-pressure (k-S-P) relationships, and that considers the potential entrapment of any fluid when it is displaced. In addition rate-limited dissolution and volatalization mass transfer models have been included. The overall model has been tested for self-consistency using mass balance and temporal and spatial convergence analysis. The hysteretic k-S-P and mass exchange models have been tested against experimental results. Several example data sets are provided.

• Research Organization: Vermont Univ., Burlington, VT (United States). Research Center for Groundwater Remediation Design
• OSTI ID: 565428
• Report Number(s): PB--98-106495/XAB; CNN: Contract EPA-R-820499
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
BIODEGRADATION
DISSOLUTION
ENVIRONMENTAL TRANSPORT
EVAPORATION
GROUND WATER
MATHEMATICAL MODELS
MULTIPHASE FLOW
NONAQUEOUS SOLVENTS
PERMEABILITY
PROGRESS REPORT
SIMULATION