Computer-aided structural engineering (CASE) project: Application of finite-element, grid generation, and scientific visualization techniques to 2-D and 3-d seepage and ground-water modeling. Final report

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

OSTI ID:6030592

Tracy, F T

This report describes new advances in the computational modeling of ground water and seepage using the finite element method (FEM) in conjunction with tools and techniques typically used by the aerospace engineers. The unsolved environmental issues regarding our hazardous and toxic waste problems must be resolved, and significant resources must be placed on this effort. Some military bases are contaminated with hazardous waste that has entered the groundwater domain. A groundwater model that takes into account contaminant flow is therefore critical. First, an extension of the technique of generating an orthogonal structured grid (using the Cauchy-Riemann equations) to automatically generate a flow net for two-dimensional (2-D) steady-state seepage problems is presented for various boundary conditions. Second, a complete implementation of a three-dimensional (3-D) seepage package is described where (1) grid generation is accomplished using the EAGLE program, (2) the seepage and groundwater analysis for either confined or unconfined steady-state flow, homogeneous or inhomogeneous media, and isotropic or anisotropic soil is accomplished with no restriction on the FE grid or requirement of an initial guess of the free surface for unconfined flow problems, and (3) scientific visualization is accomplished using the program FAST developed by NASA.

• Research Organization: Army Engineer Waterways Experiment Station, Vicksburg, MS (United States). Information Technology Lab.
• OSTI ID: 6030592
• Report Number(s): AD-A-242771/4/XAB; WES/ITL--91-3
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540320* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
AQUIFERS
COMPUTERIZED SIMULATION
CONTAMINATION
ENVIRONMENTAL TRANSPORT
GROUND WATER
HAZARDOUS MATERIALS
HYDROGEN COMPOUNDS
MANAGEMENT
MASS TRANSFER
MATERIALS
MATHEMATICAL MODELS
MILITARY FACILITIES
OXYGEN COMPOUNDS
POLLUTION
SIMULATION
WASTE DISPOSAL
WASTE MANAGEMENT
WATER
WATER POLLUTION