SUTRA (Saturated-Unsaturated Transport). A Finite-Element Simulation Model for Saturated-Unsaturated, Fluid-Density-Dependent Ground-Water Flow with Energy Transport Or Chemically-Reactive Single-Species Solute Transport
SUTRA (Saturated-Unsaturated Transport). A Finite-Element Simulation Model for Saturated-Unsaturated, Fluid-Density-Dependent Ground-Water Flow with Energy Transport Or Chemically-Reactive Single-Species Solute Transport

Author:

Publisher:

Published: 1984

Total Pages: 427

ISBN-13:

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SUTRA (Saturated-Unsaturated Transport) is a computer program which simulates fluid movement and the transport of either energy or dissolved substances in a subsurface environment. The mathematical model employs a two-dimensional hybrid finite-element and integrated-finite-difference method to approximate the governing equations that describe the two interdependent processes that are simulated by SUTRA: (1) fluid density-dependent saturated or unsaturated ground-water flow, and either; (2a) transport of a solute in the ground water, in which the solute may be subject to: equilibrium adsorption on the porous matrix, and both first-order and zero-order production or decay, or, (2b) transport of thermal energy in the ground water and solid matrix of the aquifer. SUTRA provides, as the primary calculated result, fluid pressures and either solute concentrations or temperatures, as they vary with time, everywhere in the simulated subsurface system. SUTRA may also be used to simulate simpler subsets of the above process. Additional keywords: Fluid flow; Radial flow; FORTRAN. (Author).

Documentation and Verification of VST2D
Documentation and Verification of VST2D

Author: Michael J. Friedel

Publisher:

Published: 2001

Total Pages: 124

ISBN-13: 9780756722234

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The computer model described in this report, called VST2D, was designed to simulate coupled water-heat-solute transport in heterogeneous, anisotropic, two-dimensional, ground-water systems with variable fluid density. The VST2D model was verified against analytic and numerical solutions for problems of water transport under isohaline and isothermal conditions, heat transport under isobaric and isohaline conditions, and solute transport under isobaric and isothermal conditions. The code for this model is available for downloading over the Internet from a U.S. Geological Survey (USGS) software repository.