National Tsing Hua University Institutional Repository:Radionuclide transport in fractured porous media-analytical solutions for a system of parallel fractures with a flux-type boundary condition
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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 solutions for a system of parallel fractures with a flux-type boundary condition


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    题名: Radionuclide transport in fractured porous media-analytical solutions for a system of parallel fractures with a flux-type boundary condition
    作者: Chu-Tien Chen;Shih-Hai Li
    教師: 李四海
    日期: 1997
    出版者: American Nuclear Society
    關聯: NUCLEAR TECHNOLOGY, American Nuclear Society, Volume 117, Issue 2, FEB 1997, Pages 223-233
    关键词: adsorption
    flow through porous media
    fracture
    groundwater
    Laplace transforms
    radioactive waste disposal
    water pollution
    摘要: An analytical solution is developed for the problem of radionuclide transport in a system of planar parallel fractures situated in a porous rock matrix. The flux at the inlet boundary of a fracture is assumed to decrease exponentially with time. The solution considers the following processes: (a) advective transport in the fractures, (b) mechanical dispersion and molecular diffusion along the fractures, (c) molecular diffusion from a fracture to the porous matrix, (d) adsorption onto the fracture wall, (e) adsorption within the porous matrix, and (f) radioactive decay. The solution is 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. A few examples are given to illustrate the effect of various fracture spacings and groundwater velocities, a 1% penetration distance, and the effect of neglecting the longitudinal dispersion in the fractures
    URI: http://cat.inist.fr/?aModele=afficheN&cpsidt=2550915
    http://www.ans.org/
    http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/47302
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