Advanced Conceptual Models for Unsaturated and Two-Phase Flow in Fractured Rock

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The Department of Energy Environmental Management Program is faced with two major issues involving two-phase flow in fractured rock; specifically, transport of dissolved contaminants in the Vadose Zone, and the fate of Dense Nonaqueous Phase Liquids (DNAPLs) below the water table. Conceptual models currently used to address these problems do not correctly include the influence of the fractures, thus leading to erroneous predictions. Recent work has shown that it is crucial to understand the topology, or ''structure'' of the fluid phases (air/water or water/DNAPL) within the subsurface. It has also been shown that even under steady boundary conditions, the influence ... continued below

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Nicholl, Michael J.; Glass, Robert J.; Rajaram, Harihar & Wood, Thomas R. June 1, 2004.

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Description

The Department of Energy Environmental Management Program is faced with two major issues involving two-phase flow in fractured rock; specifically, transport of dissolved contaminants in the Vadose Zone, and the fate of Dense Nonaqueous Phase Liquids (DNAPLs) below the water table. Conceptual models currently used to address these problems do not correctly include the influence of the fractures, thus leading to erroneous predictions. Recent work has shown that it is crucial to understand the topology, or ''structure'' of the fluid phases (air/water or water/DNAPL) within the subsurface. It has also been shown that even under steady boundary conditions, the influence of fractures can lead to complex and dynamic phase structure that controls system behavior, with or without the presence of a porous rock matrix. Complicated phase structures within the fracture network can facilitate rapid transport, and lead to a sparsely populated and widespread distribution of concentrated contaminants; these qualities are highly difficult to describe with current conceptual models. The focus of our work is to improve predictive modeling through the development of advanced conceptual models for two-phase flow in fractured rock.

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  • Other Information: PBD: 1 Jun 2004

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  • Report No.: EMSP-87003--2004
  • Grant Number: FG07-02ER63499
  • Grant Number: FG07-02ER63514
  • DOI: 10.2172/838702 | External Link
  • Office of Scientific & Technical Information Report Number: 838702
  • Archival Resource Key: ark:/67531/metadc782091

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Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • June 1, 2004

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  • Dec. 3, 2015, 9:30 a.m.

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  • July 19, 2016, 1:01 p.m.

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Nicholl, Michael J.; Glass, Robert J.; Rajaram, Harihar & Wood, Thomas R. Advanced Conceptual Models for Unsaturated and Two-Phase Flow in Fractured Rock, report, June 1, 2004; Moscow, Idaho. (digital.library.unt.edu/ark:/67531/metadc782091/: accessed November 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.