Record Display for the EPA National Library Catalog


Main Title Finite-Element Analysis of Multiphase Immiscible Flow through Soils.
Author Kuppusamy, T. ; Sheng, J. ; Parker, J. C. ; Lenhard, R. J. ;
CORP Author Virginia Polytechnic Inst. and State Univ., Blacksburg.;Robert S. Kerr Environmental Research Lab., Ada, OK.
Year Published 1987
Report Number EPA-R-812073; EPA/600/J-87/135;
Stock Number PB88-148176
Additional Subjects Multiphase flow ; Soils ; Finite difference theory ; Solubility ; Pressure ; Porous materials ; Fluid mechanics ; Saturation ; Ground water ; Contaminants ; Convection ; Liquid flow ; Parametric equations ; Permeability ; Cymene ; Reprints ; Pollutants
Library Call Number Additional Info Location Last
NTIS  PB88-148176 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 9p
A finite-element model is developed for multiphase flow through soil involving three immiscible fluids: namely, air, water, and a nonaqueous phase liquid (NAPL). A variational method is employed for the finite-element formulation corresponding to the coupled differential equations governing flow in a three-fluid phase porous medium system with constant air phase pressure. Constitutive relationships for fluid conductivities and saturations as functions of fluid pressures, which are derived in a companion paper by J. C. Parker et al. (this issue) and which may be calibrated from two-phase laboratory measurements, are employed in the finite-element program. The solution procedure uses backward time integration with iteration by a modified Picard method to handle the nonlinear properties. Laboratory experiments involving water displacement from soil columns by p cymene (a benzene-derivative hydrocarbon) under constant pressure were simulated by the finite-element program to validate the numerical model and formulation for constitutive properties. (Copyright (c) 1987 by the American Geophysical Union.)