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    National Tsing Hua University Institutional Repository > 原子科學院  > 工程與系統科學系 > 期刊論文 >  Radionuclide transport in fractured porous media-analytical solution for a system of parallel fractures with a constant inlet flux


    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/47305


    Title: Radionuclide transport in fractured porous media-analytical solution for a system of parallel fractures with a constant inlet flux
    Authors: Chu-Tien Chen;Shih-Hai Li
    教師: 李四海
    Date: 1997
    Publisher: Elsevier
    Relation: Waste Management, Elsevier, Volume 17, Issue 1, 1997, Pages 53-64
    Keywords: ption
    diffusion
    fracture
    groundwater
    integration
    Laplace transforms
    porous materials
    radioactive pollution
    radioactive waste disposal
    radioisotopes
    rocks
    water pollution
    Abstract: Analytical solutions are developed for the problem of radionuclide transport in a system of parallel fractures situated in a porous rock matrix. A constant flux is used as the inlet boundary condition. The solutions consider the following processes: (a) advective transport along the fractures; (b) mechanical dispersion and molecular diffusion along the fractures; (c) molecular diffusion from a fracture to the porous matrix; (d) molecular diffusion within the porous matrix in the direction perpendicular to the fracture axis; (e) adsorption onto the fracture wall; (f) adsorption within the porous matrix, and (g) radioactive decay. The solutions are based on the Laplace transform method. The general transient solution is in the form of a double integral that is evaluated using composite Gauss-Legendre quadrature. A simpler transient solution that is in the form of a single integral is also presented for the case that assumes negligible longitudinal dispersion along the fractures. The steady-state solutions are also provided. A number of examples are given to illustrate the effects of various important parameters, including: (a) fracture spacing; (b) fracture dispersion coefficient; (c) matrix diffusion coefficient; (d) fracture width; (e) groundwater velocity; (f) matrix retardation factor; and (g) matrix porosity
    URI: http://www.elsevier.com/
    http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/47305
    Appears in Collections:[工程與系統科學系] 期刊論文

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