rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Three dimensional semi-analytical simulation of multiple well soil vapor extraction
  title info:
    title: 3-d semi-analytical simulation of multiple well soil vapor extraction
  name:
    name part: Hsu, Hui-Tsung
    name part: 1961-
    role:
      role term: creator
  type of resource: text
  genre: bibliography
  origin info:
    place:
      place term: xx
    date issued: 1995
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xiv, 204 leaves : illustrations ; 28 cm.
  abstract: Volatile organic compounds are essential chemical agents in various industrial processes. As they are being used in many applications, improper disposal of these compounds create a serious environmental problem and a threat to public health. Soil vapor extraction is considered to be a cost-effective and less time-consuming technique for removal of VOCs from the subsurface. However, the design of the extraction system is still based on empirical rules of thumb and subjective professional engineering judgment. Expensive pilot test is often required to determine the feasibility of the technique and the optimum system operation parameters. Therefore, engineering design tools are needed to estimate the performance of SVE. In this dissertation, a mathematical formulation and a numerical simulation model for vapor extraction processes are developed. The contaminated domain is first discretized into small nonoverlapping control volumes. In order to improve the computation efficiency, the control volumes are discretized with variable size. More refined grids are used near the extraction wells to capture the rapid change in pressure within this area. Larger control volumes are used to cover the area that is further away from wells. The node is defined at the center of each control volume. The partial differential equation describing the pressure distribution induced by multiple well is solved by principle of superposition. It is based on the analytical solutions for a partially screened well. The differential equation describing the vapor transport within the unsaturated zone is solved numerically using the discretization method, in which the differential equation is integrated over the control volume. The subsurface environmental conditions and the physicochemical properties of the contaminants are used as input parameters and the model can estimate the required engineering properties. Validity of the numerical scheme is evaluated by comparing the solutions with special case…
  note: by Hui-Tsung Hsu.
  note: Vita.
  note: "Major Subject: Civil Engineering".
  note: Issued also on microfiche from University Microfilms Inc.
  note: Includes bibliographical references.
  note: Ph. D. Texas A&M University 1995.
  subject:
    topic: Major civil engineering
  identifier: 96-15816 UMI
  identifier: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  record info:
    record content source: TXA
    record creation date: 961008
    record change date: 20190325093223.0
    record identifier: in00001320558