Journal ArticleDOI
Spatial Moment Analysis for One-Dimensional Nonisothermal Quartz Transport and Dissolution/Precipitation in Fracture-Matrix System
G. Suresh Kumar,Ahmad Ghassemi +1 more
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TLDR
In this article, a spatial-moment analysis of nonisothermal solute transport with simplified dissolution/precipitation of quartz in a single fracture-matrix system using a dual porosity framework is presented.Abstract:
This paper presents a spatial-moment analysis of nonisothermal solute transport with simplified dissolution/precipitation of quartz in a single fracture-matrix system using a dual porosity framework. For this purpose, a one-dimensional coupled thermal and solute transport between an injection and a production well is modeled numerically to obtain spatial distribution of temperature and concentration profiles along the fracture. Subsequently, concentration based on first and second spatial moments is evaluated. The effective macrodispersion coefficient is analyzed to study its influence on water velocity, fracture aperture, reservoir diffusion coefficient, reservoir thermal conductivity, reservoir porosity, quartz fraction of the reservoir, and the initial reservoir temperature. The results suggest a non-Fickian behavior that approaches a Fickian behavior due to the effect of coupled matrix diffusion. The mixing characteristics near the injection well are highly sensitive to the above-mentioned parameters at early times, but this mixing effect is subsequently suppressed away from the injection well.read more
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Journal ArticleDOI
Mathematical Modeling of Groundwater Flow and Solute Transport in Saturated Fractured Rock Using a Dual-Porosity Approach
TL;DR: In this paper, an improved mathematical model is suggested that better describes fluid flow through a coupled fracture-matrix system using a dual-porosity approach, which differs from a conventional model as the fracture flow equation contains a hyperbolic term in addition to the conventional dispersive term.
Journal ArticleDOI
Thermal front propagation in variable aperture fracture–matrix system: A numerical study
Nikhil Bagalkot,G. Suresh Kumar +1 more
TL;DR: In this article, a numerical study on the effect of complex fracture aperture geometry on propagation of thermal front in a coupled single fracture-matrix system has been carried out, and the results suggest that variation of fracture aperture increases the heat transfer rate at the fracture matrix interface.
Journal ArticleDOI
Temporal moment analysis of solute transport in a coupled fracture-skin-matrix system
V. Renu,G. Suresh Kumar +1 more
TL;DR: In this paper, a coupled partial differential equations for fracture, fracture-skin and rock-matrix has been solved numerically in a pseudo two-dimensional domain using implicit finite difference method.
Journal ArticleDOI
Subsurface transport of nuclear wastes in the Indian subcontinent
TL;DR: In this article, a mathematical model for describing the spatial and temporal distribution of concentration of a radionuclide chain in a saturated subsurface system is presented, where the transport of radions occurs by advection and hydrodynamic dispersion.
Journal ArticleDOI
Numerical modeling on the sensitivity of directional dependent interface heat transfer on thermal transport in a coupled fracture-matrix system
TL;DR: In this paper, a finite volume numerical model has been developed in order to analyze the influence of the source/sink term which defines the heat transfer at the fracture-matrix interface.
References
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