Premium
Numerical modelling of multiphase immiscible flow in double‐porosity featured groundwater systems
Author(s) -
Ngien Su Kong,
Rahman Norhan A.,
Lewis Roland W.,
Ahmad Kamarudin
Publication year - 2012
Publication title -
international journal for numerical and analytical methods in geomechanics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.419
H-Index - 91
eISSN - 1096-9853
pISSN - 0363-9061
DOI - 10.1002/nag.1055
Subject(s) - discretization , multiphase flow , porosity , galerkin method , groundwater , geotechnical engineering , saturation (graph theory) , finite element method , porous medium , mechanics , partial differential equation , permeability (electromagnetism) , capillary pressure , capillary action , residual , numerical analysis , groundwater model , groundwater flow , geology , mathematics , aquifer , thermodynamics , chemistry , mathematical analysis , physics , algorithm , biochemistry , combinatorics , membrane
SUMMARY A numerical model describing the flow of multiphase, immiscible fluids in a deformable, double‐porosity featured soil has been developed. The model is focused on the modelling of the secondary porosity features in soil, which is more relevant to groundwater contamination problems. The non‐linear saturation and relative permeabilities were expressed as functions of the capillary pressures. The governing partial differential equations in terms of soil displacement and fluid pressures were solved numerically. Galerkin's weighted‐residual finite element method was employed to obtain the spatial discretization whereas temporal discretization was achieved using a fully implicit scheme. The model was verified against established, peer‐reviewed works, and the assumption that the immiscible fluids (non‐aqueous phase liquids) will flow preferentially through the secondary porosity features in soil was validated. Copyright © 2011 John Wiley & Sons, Ltd.