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Contaminant transport through a fractured porous rock: Impact of the inlet boundary condition on the concentration profile in the rock matrix
Author(s) -
Moreno Luis,
Rasmuson Anders
Publication year - 1986
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/wr022i012p01728
Subject(s) - inlet , matrix (chemical analysis) , sorption , fracture (geology) , constant (computer programming) , tracer , porosity , flux (metallurgy) , geotechnical engineering , boundary value problem , boundary (topology) , geology , materials science , mineralogy , mechanics , composite material , chemistry , metallurgy , geomorphology , mathematics , mathematical analysis , physics , organic chemistry , adsorption , computer science , nuclear physics , programming language
In tracer tests in single fractures in fissured rock it is of interest to determine the concentration profile in the adjacent rock matrix. In the present note, concentration profiles in the rock matrix are calculated for the case of contaminant transport in a single fracture. Two different inlet boundary conditions are used: constant concentration and constant flux at the inlet of the fracture. An analytical solution is derived for the concentration in the fissure and the matrix for constant flux condition at the inlet. Concentration profiles are shown for different values of the sorption coefficient within the rock matrix and at different locations along the fracture. For low Petlet numbers, it is shown that the concentration in the matrix is strongly influenced by the inlet boundary condition.