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 8

Particle–Particle Interaction

Abstract

The mechanical behavior of bulk solids is determined by interactions between particles at the microscopic level. In this chapter, typical particle–particle interactions are discussed. Both static (i.e., contact) and dynamic (i.e., impact) interactions of elastic and elastic-plastic particles with or without adhesion and the presence of liquid bridge are considered. For normal contact/impact of elastic particles, Hertz theory is introduced, and force–displacement relationships and duration of impact are analyzed. For tangential contact/oblique impact of elastic spheres, contact mechanics models, kinematic models, rigid body dynamics, and bilinear models are introduced and discussed. For interaction ...