SAMFT2D: Single-phase and multiphase flow and transport in 2 dimensions. Version 2, Documentation and user`s guide

Technical Report · Sun Sep 01 04:00:00 EDT 1991

DOI:https://doi.org/10.2172/93494· OSTI ID:93494

Huyakorn, P S; Wu, Y S; Panday, S; Park, N S; Kool, J B ^[1]

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1. HydroGeoLogic, Inc., Herndon, VA (United States)

This report documents a two-dimensional finite element model, SAMFT2D, developed to simulate single-phase and multiphase fluid flow and solute transport in variably saturated porous media. The formulations of the governing equations and the numerical procedures used in the code for single-phase and multiphase flow and transport are presented. The code is constructed to handle single-phase as well as two- or three-phase flow conditions using two integrated sets of computational modules. A fully implicit time-stepping scheme is used in the code for both single-phase and multiphase flow simulations. Either the Crank-Nicholson scheme or the fully implicit scheme may be used in the transport simulation. The single-phase modules employ the conventional Galerkin and upstream-weighted residual finite element techniques to model flow and transport of water (aqueous phase) containing dissolved single-species contaminants concurrently or sequentially, and include the treatment of various boundary conditions and physical processes. The multiphase flow modules use the Galerkin schemes with upstream weighting of phase mobilities to simulate two- or three-phase flow problems, and treat different boundary conditions in terms of source/sink terms fully implicitly. The multiphase solute transport modules employ the upstream-weighted residual schemes to handle single-species transport in multiphase fluid systems. Several example problems are presented to verify the code and to demonstrate its utility. These problems range from one-phase unsaturated flow and transport to two- and three-phase flow problems including gravity and capillary effects and associated transport simulations.

• Research Organization: Los Alamos National Lab., NM (United States); HydroGeoLogic, Inc., Herndon, VA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 93494
• Report Number(s): LA-SUB--95-27-2; ON: DE95013053
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
58 GEOSCIENCES
ENVIRONMENTAL TRANSPORT
FLUID FLOW
GROUND WATER
MANUALS
RADIONUCLIDE MIGRATION
S CODES
SOILS
SOLUTES
TWO-DIMENSIONAL CALCULATIONS