Application of the Multilayer Analysis to Contaminant Transport along Porous Media Flow with Variable Coefficients and two-input Sources

Document Type : Original Research Paper

Authors

1 Laboratory of Nuclear Physics, Department of Physics, Faculty of Science, University of Yaounde I, P.O. Box 812, Cameroon

2 Department of physics, University of Maroua, P.O. Box 814, Maroua Cameroon

3 Nuclear Technology Section, Energy Research Laboratory, Institute of Geological and Mining Research, Yaounde, Cameroon

4 Higher Teacher Training College, Department of physics, University of Bertoua, P.O. Box 652, Cameroon

10.22059/poll.2022.345098.1520

Abstract

This study presents a new approach to solve the one-dimensional solute transport equation with variable coefficients and two input sources in a finite porous media. The medium is divided into m-layers porous media with constant averages coefficients in each transport problem. The transport equations in layer i-1 and i are coupled by imposing the continuity of solute concentration and the dispersive flux at the interfaces of the layers. Unknown functions representing the dispersive flux at the interfaces between adjacent layers are introduced allowing the multilayer problem to be solved separately on each layer in the Laplace domain before being numerical inverted back to the time domain. The obtained solution was compared with the Generalized Integral Transform Technique (GITT) and numerical solutions for some problems of solute transport with variables coefficients in porous medium present in the literature. The results show a good agreement between both solutions for each of the studied problem. An example of application considering an advective-dispersive transport problem with a sinusoidal time-dependent emitting rate at the boundary was study in order to illustrate the effect of sinusoidal frequency on solute concentration. 

Keywords

References

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Pollution
Volume 9, Issue 1
January 2023
Pages 222-242

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