Colloidal Transport in Porous Media - Modeling and Analysis
Author: Nadja Ray
Publisher:
Published: 2013-06-28
Total Pages: 185
ISBN-13: 9783844020434
DOWNLOAD EBOOKRead and Download eBook Full
Author: Nadja Ray
Publisher:
Published: 2013-06-28
Total Pages: 185
ISBN-13: 9783844020434
DOWNLOAD EBOOKAuthor: Jennifer Smith
Publisher:
Published: 2006
Total Pages: 136
ISBN-13:
DOWNLOAD EBOOKAuthor: Fritz H. Frimmel
Publisher: Springer Science & Business Media
Published: 2007-05-26
Total Pages: 294
ISBN-13: 3540713395
DOWNLOAD EBOOKThis book covers the basics of abiotic colloid characterization, of biocolloids and biofilms, the resulting transport phenomena and their engineering aspects. The contributors comprise an international group of leading specialists devoted to colloidal sciences. The contributions include theoretical considerations, results from model experiments, and field studies. The information provided here will benefit students and scientists interested in the analytical, chemical, microbiological, geological and hydrological aspects of material transport in aquatic systems and soils.
Author: Jeffrey Y. Chen
Publisher:
Published: 1998
Total Pages: 138
ISBN-13:
DOWNLOAD EBOOKAuthor: Fritz H. Frimmel
Publisher: Springer Verlag
Published: 2007-05-29
Total Pages: 291
ISBN-13: 9783540713388
DOWNLOAD EBOOKColloids are known to be the often neglected phase for the transport of pollutants in aquatic ecosystems. This book covers the basics of abiotic colloid characterization, of biocolloids and biofilms, the resulting transport phenomena and their engineering aspects. The contributors are leading specialists devoted to colloidal sciences. The discussion reflects their broad scope of viewpoint and depth of expertise. Coverage includes theoretical considerations, results from model experiments, and field studies.
Author: Zhaoli Guo
Publisher: World Scientific
Published: 2013-03-25
Total Pages: 419
ISBN-13: 9814508314
DOWNLOAD EBOOKLattice Boltzmann method (LBM) is a relatively new simulation technique for the modeling of complex fluid systems and has attracted interest from researchers in computational physics. Unlike the traditional CFD methods, which solve the conservation equations of macroscopic properties (i.e., mass, momentum, and energy) numerically, LBM models the fluid consisting of fictive particles, and such particles perform consecutive propagation and collision processes over a discrete lattice mesh.This book will cover the fundamental and practical application of LBM. The first part of the book consists of three chapters starting form the theory of LBM, basic models, initial and boundary conditions, theoretical analysis, to improved models. The second part of the book consists of six chapters, address applications of LBM in various aspects of computational fluid dynamic engineering, covering areas, such as thermo-hydrodynamics, compressible flows, multicomponent/multiphase flows, microscale flows, flows in porous media, turbulent flows, and suspensions.With these coverage LBM, the book intended to promote its applications, instead of the traditional computational fluid dynamic method.
Author: Li Cheng
Publisher:
Published: 2006
Total Pages: 504
ISBN-13:
DOWNLOAD EBOOKThe traditional colloid filtration model has been recognized to not fully describe transport of microorganisms in porous media under many conditions. Potential reasons for the discrepancies between colloid filtration theories and observed data are summarized into three aspects in the dissertation, including physicochemical heterogeneity, a blocking effect in the attachment process, and irreversible straining. A new transport model is developed to incorporate these non-ideal phenomena. First, both the collision-efficiency coefficient and the detachment-rate coefficient are formulated as probability density functions with log-normal distributions to represent physicochemical heterogeneity of both microbial and porous-medium grain surfaces. Second, the blocking effect is represented by appending a modified random sequential adsorption (RSA) function to the kinetic rate equation. Third, a semi-empirical equation is developed to describe the straining effect. The new model is then evaluated with a series of sensitivity analyses and illustrative applications to measured data. Sensitivity analysis on the role of probability density function (PDF) in collision efficiency and detachment rate coefficient shows that heterogeneity causes longer tailing in breakthrough curves, This effect is controlled by the implementation of the PDF in the detachment rate coefficient because the lower values among a series of detachment rate coefficients delay detachment. Straining phenonmena have received more and more attentions for protozoa transport. The new semi-empirical straining equation derived in the dissertation provides reasonable matches to the colloid data and cryptosporidium data. The Blocking effect is another process of concern for microbial transport, as shown in the analysis of microsporidium column experiments herein. The new model also proved to be successful for simulating MS-2 virus transport. The work presented will help enhance our understanding of biocolloid transport in porous media.
Author: Ning Sun
Publisher:
Published: 1998
Total Pages: 476
ISBN-13:
DOWNLOAD EBOOKAuthor: Ann Mathew
Publisher:
Published: 2007
Total Pages: 272
ISBN-13:
DOWNLOAD EBOOKAuthor: Xinyao Yang
Publisher: LAP Lambert Academic Publishing
Published: 2012
Total Pages: 244
ISBN-13: 9783847377405
DOWNLOAD EBOOKColloids refer to particles or macromolecules with at least one dimension of 1nm 1m. A wide range of environmental particles fall within this category including microorganisms, nanoparticles, and mineral precipitates. Understanding colloid fate and transport in porous medium not only permits more effective protection of water supplies, but also allows for the development of more effective pollutant remediation strategies. Organic matter (OM) complicates colloid behaviour. To date the influence of OM on colloid mobility in porous media has been largely qualitative. This book presents research leading to the development of multiple-pulse column techniques that may be integrated with mathematical models to quantify the effects of OM on particulate colloid attenuation in saturated porous medium. Research has investigated how two groups of environmental organic compounds, humic acids and proteins, influence particulate colloid attenuation by saturated sand. Study findings may shed light on complex colloidal behaviour in organic matter impacted environment and be useful to professionals in contaminant hydrogeology, environmental remediation, and wastewater treatment.