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On the simulation of nonaqueous phase organic compounds in the subsurface
Author(s) -
Pinder George F.,
Abriola Linda M.
Publication year - 1986
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/wr022i09sp0109s
Subject(s) - nonlinear system , aquifer , partial differential equation , constitutive equation , porous medium , flow (mathematics) , groundwater , multiphase flow , phase (matter) , point (geometry) , groundwater flow , computer science , geotechnical engineering , mathematics , mechanics , geology , porosity , thermodynamics , chemistry , physics , mathematical analysis , finite element method , organic chemistry , geometry , quantum mechanics
The movement of nonaqueous phase organic liquids (NAPL) in a groundwater system involves both miscible and immiscible flow phenomena. A broad overview of the task of modeling these flows is presented along with a discussion of various problematic issues related to such a modeling effort. Descriptive equations are obtained through combination of the species balance equations for multiphase fluid flow in a porous medium and appropriate constitutive relationships. Tabulation and discussion of these constitutive relations yields insight into model requirements. Under certain assumptions, the modeling problem can be reduced to the solution of two nonlinear partial differential equations in two unknowns. An example simulation of the movement of NAPL emanating from two point sources in a confined aquifer is presented to illustrate present modeling capabilities.