Kumar, G Anvesh and N, Seetha
(2019)
Colloid Transport in Chemically Heterogeneous Porous Media.
Masters thesis, Indian Institute of Technology Hyderabad.
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Abstract
Model is developed to simulate transport of colloids in a chemically heterogeneous porous media by considering a cylindrical pore. In this work, the pore space is divided into three different regions, namely, bulk, diffusion, and potential regions. In the bulk and diffusion region, colloid transport is governed by Diffusion-Advection equations for colloid transport, while the interaction between the diffusion and potential regions is included as a boundary condition. This interaction is modeled as a first order reversible kinetic adsorption. Mass transfer rate coefficients are derived in terms of interaction energy.
Interaction energy for chemically heterogeneous porous media is calculated using Patch wise Model. The colloidal particle concentration profile obtained for the cylindrical pore is averaged over a moving averaging volume within the pore in order to get the 1-D concentration field. These equations can be incorporated into pore network models to study the effect of pore-scale parameters on particle deposition at larger length scales such as Darcy scale.
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