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Discrete-element Modeling of Granular Materials

2011-05-03 Mathematics
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Release : 2011-05-03
Genre : Mathematics
Kind : eBook
Book Rating : 602/5 ( reviews)

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Book Synopsis Discrete-element Modeling of Granular Materials by : Farhang Radjaï

Download or read book Discrete-element Modeling of Granular Materials written by Farhang Radjaï. This book was released on 2011-05-03. Available in PDF, EPUB and Kindle. Book excerpt: This book brings together in a single volume various methods and skills for particle-scale or discrete-element numerical simulation of granular media. It covers a broad range of topics from basic concepts and methods towards more advanced aspects and technical details applicable to the current research on granular materials. Discrete-element simulations of granular materials are based on four basic models (molecular dynamics, contact dynamics, quasi-static and event driven) dealing with frictional contact interactions and integration schemes for the equations of dynamics. These models are presented in the first chapters of the book, followed by various methods for sample preparation and monitoring of boundary conditions, as well as dimensionless control parameters. Granular materials encountered in real life involve a variety of compositions (particle shapes and size distributions) and interactions (cohesive, hydrodynamic, thermal) that have been extensively covered by several chapters. The book ends with two applications in the field of geo-materials.

Understanding the Discrete Element Method

2014-06-23 Science
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Release : 2014-06-23
Genre : Science
Kind : eBook
Book Rating : 20X/5 ( reviews)

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Book Synopsis Understanding the Discrete Element Method by : Hans-Georg Matuttis

Download or read book Understanding the Discrete Element Method written by Hans-Georg Matuttis. This book was released on 2014-06-23. Available in PDF, EPUB and Kindle. Book excerpt: Gives readers a more thorough understanding of DEM and equips researchers for independent work and an ability to judge methods related to simulation of polygonal particles Introduces DEM from the fundamental concepts (theoretical mechanics and solidstate physics), with 2D and 3D simulation methods for polygonal particles Provides the fundamentals of coding discrete element method (DEM) requiring little advance knowledge of granular matter or numerical simulation Highlights the numerical tricks and pitfalls that are usually only realized after years of experience, with relevant simple experiments as applications Presents a logical approach starting withthe mechanical and physical bases,followed by a description of the techniques and finally their applications Written by a key author presenting ideas on how to model the dynamics of angular particles using polygons and polyhedral Accompanying website includes MATLAB-Programs providing the simulation code for two-dimensional polygons Recommended for researchers and graduate students who deal with particle models in areas such as fluid dynamics, multi-body engineering, finite-element methods, the geosciences, and multi-scale physics.

Discrete Element Methods

2002 Mathematics
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Release : 2002
Genre : Mathematics
Kind : eBook
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Book Synopsis Discrete Element Methods by : Benjamin K. Cook

Download or read book Discrete Element Methods written by Benjamin K. Cook. This book was released on 2002. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the Third International Conference on Discrete Element Methods, held in Santa Fe, New Mexico on September 23-25, 2002. This Geotechnical Special Publication contains 72 technical papers on discrete element methods (DEM), a suite of numerical techniques developed to model granular materials, rock, and other discontinua at the grain scale. Topics include: DEM formulation and implementation approaches, coupled methods, experimental validation, and techniques, including three-dimensional particle representations, efficient contact detection algorithms, particle packing schemes, and code design. Coupled methods include approaches to linking solid continuum and fluid models with DEM to simulate multiscale and multiphase phenomena. Applications include fundamental investigations of granular mechanics; micromechanical studies of powder, soil, and rock behavior; and large-scale modeling of geotechnical, material processing, mining, and petroleum engineering problems.

Granular Dynamics, Contact Mechanics and Particle System Simulations

2015-09-03 Science
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Release : 2015-09-03
Genre : Science
Kind : eBook
Book Rating : 112/5 ( reviews)

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Book Synopsis Granular Dynamics, Contact Mechanics and Particle System Simulations by : Colin Thornton

Download or read book Granular Dynamics, Contact Mechanics and Particle System Simulations written by Colin Thornton. This book was released on 2015-09-03. Available in PDF, EPUB and Kindle. Book excerpt: This book is devoted to the Discrete Element Method (DEM) technique, a discontinuum modelling approach that takes into account the fact that granular materials are composed of discrete particles which interact with each other at the microscale level. This numerical simulation technique can be used both for dispersed systems in which the particle-particle interactions are collisional and compact systems of particles with multiple enduring contacts. The book provides an extensive and detailed explanation of the theoretical background of DEM. Contact mechanics theories for elastic, elastic-plastic, adhesive elastic and adhesive elastic-plastic particle-particle interactions are presented. Other contact force models are also discussed, including corrections to some of these models as described in the literature, and important areas of further research are identified. A key issue in DEM simulations is whether or not a code can reliably simulate the simplest of systems, namely the single particle oblique impact with a wall. This is discussed using the output obtained from the contact force models described earlier, which are compared for elastic and inelastic collisions. In addition, further insight is provided for the impact of adhesive particles. The author then moves on to provide the results of selected DEM applications to agglomerate impacts, fluidised beds and quasi-static deformation, demonstrating that the DEM technique can be used (i) to mimic experiments, (ii) explore parameter sweeps, including limiting values, or (iii) identify new, previously unknown, phenomena at the microscale. In the DEM applications the emphasis is on discovering new information that enhances our rational understanding of particle systems, which may be more significant than developing a new continuum model that encompasses all microstructural aspects, which would most likely prove too complicated for practical implementation. The book will be of interest to academic and industrial researchers working in particle technology/process engineering and geomechanics, both experimentalists and theoreticians.

Discrete Element Modeling of Granular Materials Under Biaxial Conditions

1996 Axial loads
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Release : 1996
Genre : Axial loads
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Book Synopsis Discrete Element Modeling of Granular Materials Under Biaxial Conditions by : Runing Zhang

Download or read book Discrete Element Modeling of Granular Materials Under Biaxial Conditions written by Runing Zhang. This book was released on 1996. Available in PDF, EPUB and Kindle. Book excerpt:

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