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Comparison of scale analysis and numerical simulation for saturated zone convective mixing processes

Description: Scale analysis can be used to predict a variety of quantities arising from natural systems where processes are described by partial differential equations. For example, scale analysis can be applied to estimate the effectiveness of convective missing on the dilution of contaminants in groundwater. Scale analysis involves substituting simple quotients for partial derivatives and identifying and equating the dominant terms in an order-of-magnitude sense. For free convection due to sidewall heatin… more
Date: June 1, 1998
Creator: Oldenburg, C. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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ITOUGH2 V3.2 verification and validation report

Description: This report describes the Verification and Validation (V and V) test cases performed to qualify ITOUGH2 V3.2. ITOUGH2 V3.2 was installed in a directory {approximately}/itough2v3.2 on a SUN ULTRA 1 workstation under UNIX Solaris 2. Instructions for installing ITOUGH2 can be found in file read.me and the user`s manual. This report is structured as follows: for each functional requirement, the corresponding design is described, which may include the mathematical model implemented in ITOUGH2 V3.2, … more
Date: June 1, 1998
Creator: Finsterle, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Enhanced data analysis for the VZMS: Conceptual model design and initial application for the Vadose Zone Monitoring System (VZMS), McClellan AFB. 1998 semi-annual report

Description: The VZMS project at McClellan AFB involves both vadose zone data collection as well as enhanced data analysis. The purpose of enhanced data analysis is to develop conceptual models to carry out model validation and evaluation, as well as sensitivity and predictive modeling studies. Enhanced data analysis consists primarily of T2VOC forward simulations and ITOUGH2 inverse modeling. The methodology the authors employ in the VZMS project involves developing a conceptual model and iteratively updat… more
Date: June 14, 1998
Creator: James, A. L. & Oldenburg, C. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A chaotic-dynamical conceptual model to describe fluid flow and contaminant transport in a fractured vadose zone. 1997 progress report and presentations at the annual meeting, Ernest Orlando Lawrence Berkeley National Laboratory, December 3--4, 1997

Description: Understanding subsurface flow and transport processes is critical for effective assessment, decision-making, and remediation activities for contaminated sites. However, for fluid flow and contaminant transport through fractured vadose zones, traditional hydrogeological approaches are often found to be inadequate. In this project, the authors examine flow and transport through a fractured vadose zone as a deterministic chaotic dynamical process, and develop a model of it in these terms. Initiall… more
Date: July 1, 1998
Creator: Faybishenko, B.; Doughty, C. & Geller, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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New 3D parallel GILD electromagnetic modeling and nonlinear inversion using global magnetic integral and local differential equation

Description: This paper describes a new 3D parallel GILD electromagnetic (EM) modeling and nonlinear inversion algorithm. The algorithm consists of: (a) a new magnetic integral equation instead of the electric integral equation to solve the electromagnetic forward modeling and inverse problem; (b) a collocation finite element method for solving the magnetic integral and a Galerkin finite element method for the magnetic differential equations; (c) a nonlinear regularizing optimization method to make the inve… more
Date: July 1, 1998
Creator: Xie, G.; Li, J.; Majer, E. & Zuo, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Experimental investigation of magnetically driven flow of ferrofluids in porous media

Description: This report presents experimental results of the flow of ferrofluids in porous media to investigate the potential for precisely controlling fluid emplacement in porous media using magnetic fields. Ferrofluids are colloidal suspensions of magnetic particles stabilized in various carrier liquids. In the presence of an external magnetic field, the ferrofluid becomes magnetized as the particles align with the magnetic field. Potential applications of ferrofluids to subsurface contamination problems… more
Date: August 1, 1998
Creator: Borglin, S.E.; Moridis, G.J. & Oldenburg, C.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Using TRINET for simulating flow and transport in porous media

Description: The finite element model TRINET calculates transient or steady-state fluid flow and solute transport on a lattice composed of one-dimensional finite elements (i.e., pipes) of porous medium. TRINET incorporates an adaptive gridding algorithm to minimize numerical dispersion for transport calculations. Although TRINET was originally developed to study fracture networks, the primary interest here is in applying TRINET more generally to simulate transport in porous media (or a fractured medium bein… more
Date: August 1, 1998
Creator: Najita, J. & Doughty, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

New 3D parallel SGILD modeling and inversion

Description: In this paper, a new parallel modeling and inversion algorithm using a Stochastic Global Integral and Local Differential equation (SGILD) is presented. The authors derived new acoustic integral equations and differential equation for statistical moments of the parameters and field. The new statistical moments integral equation on the boundary and local differential equations in domain will be used together to obtain mean wave field and its moments in the modeling. The new moments global Jacobia… more
Date: September 1, 1998
Creator: Xie, G.; Li, J. & Majer, E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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