Particle Deposition and Aggregation

Particle Deposition and Aggregation

Measurement, Modelling and Simulation

1st Edition - July 5, 1995

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  • Authors: M. Elimelech, J. Gregory, X. Jia
  • eBook ISBN: 9781483161372

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Particle Deposition and Aggregation: Measurement, Modelling and Simulation describes how particle deposition and aggregation can be measured, modeled, and simulated in a systematic manner. It brings together the necessary disciplines of colloid and surface chemistry, hydrodynamics, experimental methods, and computational methods to present a unified approach to this problem. The book is divided into four parts. Part I presents the theoretical principles governing deposition and aggregation phenomena, including a discussion of the forces that exist between particles and the hydrodynamic factors that control the movement of the particles and suspending fluid. Part II introduces methods for modeling the processes, first at a simple level (e.g. single particle-surface, single particle-single particle interactions in model flow conditions) and then describes the simulation protocols and computation tools which may be employed to describe more complex (multiple-particle interaction) systems. Part III summarizes the experimental methods of quantifying aggregating and depositing systems and concludes with a comparison of experimental results with those predicted using simple theoretical predictions. Part IV is largely based on illustrative examples to demonstrate the application of simulation and modeling methods to particle filtration, aggregation, and transport processes. This book should be useful to graduates working in process and environmental engineering research or industrial development at a postgraduate level, and to scientists who wish to extend their knowledge into more realistic process conditions in which the fluid hydrodynamics and other complicating factors must be accommodated.

Table of Contents

  • Preface

    Part I: Theoretical Analysis of Deposition and Aggregation Phenomena

    1 Introduction

    2 Electrical Properties of Interfaces

    2.1 Introduction

    2.2 The electrical double layer

    2.3 Electrokinetic phenomena



    3 Surface Interaction Potentials

    3.1 Introduction

    3.2 Double layer interaction between macroscopic bodies

    3.3 Van der Waals interaction

    3.4 Non-DLVO forces

    3.5 DLVO description of colloidal stability



    4 Colloidal Hydrodynamics and Transport

    4.1 Basic concepts in fluid and particle dynamics

    4.2 Brownian motion and diffusion

    4.3 Motion of a single sphere

    4.4 Relative motion of two spheres

    4.5 Concentration dependence of diffusion coefficients

    4.6 Quantitative description of deposition phenomena



    Part II: Modeling and Simulation

    5 Modeling of Particle Deposition onto Ideal Collectors

    5.1 Rotating disc system

    5.2 Stagnation-point flow

    5.3 Parallel-plate channel

    5.4 Spherical collector

    5.5 Interaction-force boundary-layer approximation

    5.6 Trajectory analysis

    5.7 Representative simulations of particle deposition



    6 Modeling of Aggregation Processes

    6.1 Collisions and aggregation: the Smoluchowski approach

    6.2 Collision mechanisms

    6.3 Collision efficiencies

    6.4 Form of aggregates

    6.5 Aggregate strength and break up

    6.6 Aggregate size

    6.7 Flocculation by polymers



    7 Selection of a Simulation Method

    7.1 Overview of simulation protocol

    7.2 Useful concepts in statistical mechanics

    7.3 Monte Carlo methods

    7.4 Molecular dynamics methods

    7.5 Brownian dynamics methods



    8 Implementation of Computer Simulations

    8.1 Pair potential models

    8.2 Periodic boundary conditions

    8.3 Generating random numbers

    8.4 Example: implementation of Metropolis MC simulation

    8.5 Computer hardware

    8.6 Visualization of simulation results

    8.7 Appendices



    Part III: Experimental Methods and Model Validation Techniques

    9 Experimental Techniques For Aggregation Studies

    9.1 General: choice of technique

    9.3 Light-scattering methods

    9.4 Other optical methods

    9.5 Aggregate properties



    10 Experimental Techniques in Particle Deposition Kinetics

    10.1 System requirements

    10.2 Particle counting methods

    10.3 Model deposition systems

    10.4 Determination of experimental collision efficiencies



    11 Theoretical Predictions Compared to Experimental Observations in Particle Deposition Kinetics

    11.1 Deposition with repulsive double layers

    11.2 Deposition in the presence of attractive double layers

    11.3 Possible explanations for observed discrepancies in unfavorable deposition

    11.4 A Semi-empirical approach for predicting collision efficiencies



    Part IV: Applications and Limitations of Predictive Modeling

    12 Performance Of Packed Bed-Filters

    12.1 Particle removal mechanisms

    12.2 Modeling of particle removal in granular filtration

    12.3 Predictions of filter performance



    13 Transport of Colloidal Materials in Ground Water

    13.1 Transport of viruses in soils and ground water

    13.2 Transport of colloids and associated pollutants in ground water

    13.3 Colloid travel distances in porous media



    14 Advanced Simulation of Porous Media and Filtration Processes

    14.1 Classification of filtration processes and models

    14.2 Random line network model

    14.3 Poisson point-line model

    14.4 Tessellation models

    14.5 Random packing of spheres


    15 Application of Simulation Techniques to Colloidal Dispersion Systems

    15.1 MC simulation of triplet formation

    15.2 MC simulation of magnetic flocculation

    15.3 BD simulation of colloidal aggregation

    15.4 BD simulation of colloidal deposition

    15.5 Simulation of colloids under shear

    15.6 Stokesian dynamics simulations

    15.7 Conclusions


    Author Index

    Subject Index

Product details

  • No. of pages: 458
  • Language: English
  • Copyright: © Butterworth-Heinemann 1995
  • Published: July 5, 1995
  • Imprint: Butterworth-Heinemann
  • eBook ISBN: 9781483161372

About the Authors

M. Elimelech

Affiliations and Expertise

Department of Civil and Environmental Engineering, UCLA

J. Gregory

X. Jia

About the Editor

R. A. Williams

Affiliations and Expertise

Senior Lecturer in Biochemistry, Department of Biochemistry, The London Hospital Medical College, UK

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