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|Title:||Application of finite element, grid generation, and scientific visualization techniques to 2-D and 3-D seepage and groundwater modeling|
|Authors:||Mississippi State University. Department of Civil and Environmental Engineering.|
In-House Laboratory Independent Research Program (U.S.)
Computer-Aided Structural Engineering Project (U.S.)
Tracy, Fred T.
|Keywords:||Finite element method|
|Publisher:||Information Technology Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||Technical report (U.S. Army Engineer Waterways Experiment Station) ; ITL-91-3.|
Abstract: This technical report describes new advances in the computational modeling of groundwater 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. A primary aspect of this report is a description of the developed complex computational techniques required to achieve the 3-D model. Finally, examples showing both generated flow nets for 2-D problems and results for both theoretical and practical 3-D problems are presented. NOTE: This file is large. Allow your browser several minutes to download the file.
|Rights:||Approved for public release; distribution is unlimited.|
|Appears in Collections:||Technical Report|
Files in This Item:
|TR-ITL-91-3.pdf||28.58 MB||Adobe PDF|