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Type: Thesis
Title: Suspension-Colloidal Transport in Porous Media: Basic Equations, Analytical Model and Nonlinear Physics Effects
Author: Zhang, Hao
Issue Date: 2018
School/Discipline: Australian School of Petroleum
Abstract: Hereby I present a Master of philosophy thesis by publications. The thesis includes two peer-reviewed journal papers. One has been published in International Journal of Non-linear Mechanics. The other has been submitted to Transport in Porous Media and is currently under review. Flow of colloidal-suspensions and nanofluids in porous media is encountered in numerous processes of the natural subsurface environment and industrial relevant fields. The physical and chemical mechanisms of particle transport and subsequent retention are of great significance in study of current filtration theory. This thesis focuses on one-dimensional non-linear advection-dispersion problems for suspensions flow through porous media. It accounts for monodisperse colloids flow with simultaneous multiple capture mechanisms, chemical flow with multiple reactions, and co-transport phenomena of natural clays and nanoparticles. Mathematical models are proposed for the above problems, and analytical solutions or numerical solutions are derived for quasi-linear or non-linear governing systems. These can be applied to wider range of reaction-advection-diffusion particulate flow problems, and supplemented to classical colloids filtration theory. A summary for publications is as follows. The first paper Two main particle capture mechanisms, i.e., straining (size-exclusion) and attachment, are widely recognised and used in suspension colloidal flow. From the observation of the laboratory tests, a typical breakthrough curve (BTC) of two capture mechanisms has been found, describing that outlet particle concentration first increases then reaches a stabilisation within a few pore volumes injected after the breakthrough moment. During steady state, the suspended concentration remains constant, which is always lower than the injected concentration. The two-capture model, in terms of novel filtration functions, is developed both for the general and approximated cases. Modelling results match laboratory data with a high accuracy, and dependencies of the model coefficients with respect to salinity and jamming ratio agree with Derjaguin–Landau–Verwey–Overbeek (DLVO) theory. The second paper Engineered nanoparticles injection into subsurface formation is widely applied in many engineering fields at present. The phenomenon of nanoparticle transport with attachment is significantly affected by the presence of the natural clay fines. A mathematical model is proposed with the assumption that one population of particles holds similar kinetics coefficients, due to the same electrostatic interactions between grains and particles, in presence of another population, Therefore, the two-capture model can be extended for co-transport of two particle populations with the introduction of two independent filtration coefficients. The model matches the co-transport experimental data with close agreement. However, the non-monotonic tendency of kaolinite fines coefficients with different salinities draws us back to the theoretic study. The aggregation between kaolinite and kaolinite may occur under the experiment conditions due to the analysis of DLVO calculations, which is not accounted for in the model.
Advisor: Bedrikovetsky, Pavel
Zhenjiang, You
Dissertation Note: Thesis (MPhil) -- University of Adelaide, Australian School of Petroleum, 2018
Keywords: Colloids
deep bed filtration
fines migration
mathematical model
several mechanisms
Provenance: This electronic version is made publicly available by the University of Adelaide in accordance with its open access policy for student theses. Copyright in this thesis remains with the author. This thesis may incorporate third party material which has been used by the author pursuant to Fair Dealing exceptions. If you are the owner of any included third party copyright material you wish to be removed from this electronic version, please complete the take down form located at:
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