Finite volume model for reactive transport in fractured porous media with distance- and time-dependent dispersion |
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| Authors: | Pramod Kumar Sharma CSP Ojha Nitin Joshi |
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| Institution: | 1. Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, Indiadrpksharma07@gmail.com;3. Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India |
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| Abstract: | AbstractThere are very few studies of fractured porous media that use distance- and time-dependent dispersion models, and, to the best of our knowledge, none which compare these with constant dispersion models. Therefore, in this study, the behaviour of temporal and spatial concentration profiles with distance- and time-dependent dispersion models is investigated. A hybrid finite volume method is used to solve the governing equations for these dispersion models. The developed numerical model is used to study the effects of matrix diffusion coefficient, groundwater velocity and matrix and fracture retardation factor on concentration profiles in the application of constant, distance-dependent and time-dependent dispersion models. In addition, an attempt is made to evaluate the applicability of these dispersion models by using the models to simulate experimental data. It was found that a better fit to the observed data is obtained in the case of distance- and time-dependent dispersion models as compared to the constant dispersion model. Thus, these numerical experiments indicate that distance- and time-dependent dispersion models have better simulation potential than the constant dispersion model. |
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| Keywords: | finite volume method reactive transport fractured porous media concentration profiles |
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