book

Particle Technology and Engineering

by Jonathan P.K. Seville, Chuan-Yu Wu

May 2016

Beginner

294 pages

English

Butterworth-Heinemann

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1.1. What Are Particles?1.2. What Is Known?1.3. Computational Modeling1.4. What Are the Applications?
2.1. Density2.2. Surface Area2.3. Flowability2.4. Compressibility2.5. Compactibility
3.1. Particle Shape3.2. Particle Size3.3. Sampling for Shape and Size Characterization
4.1. Settling of a Single Isolated Particle in a Continuous Fluid4.2. Drag Force on an Isolated Particle (Seville et al., 1997)4.3. Calculation of the Terminal Velocity4.4. Other Shapes4.5. Acceleration and Unsteady Motion24.6. Curvilinear Motion4.7. Assemblies of Particles
5.1. Gas–Solid Contact Regimes—The Whole Picture5.2. Flow Through a Packed Bed5.3. Fluidization5.4. Pneumatic Conveying5.5. Gas–Solid Separation∗

6.1. Rheology of Suspensions6.2. Pastes6.3. Agglomeration
7.1. Friction and the Coulomb Model7.2. Stress Analysis in Storage Vessels7.3. Stress Analysis for Compression of a Powder Bed7.4. Discharge Dynamics—Hopper Flow
8.1. Interaction of Elastic Particles
9.1. Hard-Sphere and Soft-Sphere DEMs9.2. The Principle of DEM9.3. Data Analysis9.4. Applications
10.1. Modeling of Particle–Particle Interaction10.2. Multiple Particle Finite Element Modeling10.3. Continuum Modeling of Powder Compaction

Content preview from Particle Technology and Engineering

Chapter 7

Mechanics of Bulk Solids

Abstract

Powders are a unique form of materials, but they can manifest gaslike, solidlike, and liquidlike at different stress states. The mechanical behavior of powders is complicated and distinctive from that of gases, solids, and liquids. The most distinct aspect of powders is that they are frictional and their mechanical behavior is state-dependent and determined by particle–particle interactions. In this chapter, the most distinguishing characteristics of powders from liquids and solids are discussed. Firstly, the comparison of mechanical behavior of powders with that of liquid and solids is made. Secondly, friction of powders is discussed in detail together with the coulomb model. Thirdly, stress analysis ...