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By C Y Wu

"Discrete point tools (DEM) is a numerical approach for analysing the mechanics and physics of particulate structures. Originated within the past due seventies for analysing geotechnical difficulties, it has noticeable major improvement and is now hired commonly throughout disciplines. Produced in party of the seventieth Birthday of Colin Thornton, this publication features a collection of papers pertaining to advances in discrete aspect modelling which have been awarded on the foreign Symposium on Discrete aspect Modelling of Particulate Media held at Birmingham, united kingdom on 28-30th March, 2012. The ebook showcases the broad program of discrete aspect modelling in gas-solid fluidisation, particulate flows, liquid-solid platforms and quasi-static behaviour. It additionally stories the hot development in coupled DEM with computational fluid dynamics, Lattice Boltzmann tools for multiphase platforms and the radical program of DEM in touch electrification and fracture of granular structures. geared toward study groups facing this method within the powder dealing with and formula industries, it will be a welcomed addition to the literature during this area."-- learn more... content material: Two-Phase platforms; Cohesive platforms; Granular Flows; Quasi-Static Deformation; topic Index summary: This publication encompasses a choice of papers pertaining to advances in discrete point modelling which have been offered on the overseas Symposium on Discrete point Modelling of Particulate Media held at Birmingham, united kingdom on 28-30th March, 2012. learn more...

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Ladd, Journal of Fluid Mechanics, 1994b. 271, 311. P. J. Hoogerbmgge and J. M. V. A. Koelman, Europhysics Letter, 1992, 19, 155. Y. L. Ding, D. York and W. Broeckx, Particuology, 2008, 6, 38. V. L. S. Campbell, Powder Technology, 2001, 116,204. Y. Tsuji, T. Kawaguchi and T. Tanaka, Powder Technology, 1993,77,79. D. Kafui, C. J. Adams, Chemical Engineering Science, 2002, 57, 2395. Y. D. Y. Wu, C. K. , 2009, 55, 49. B. Anderson and R. Jackson, Ind. Eng. Chern. , 1967, 6, 527. R. DiFelice, International Journal on Multiphase Flow, 1994,20, 153.

A collision rheology is invoked, which obeys the rules that the tangential motion is unaffected, while the normal relative velocity is ruled by a coefficient of restitution-type collision law. In this way a very simple DEM procedure is generated. The boundary conditions are made up by invoking periodic boundaries in the flow direction at the ends of the conduit. The walls are made of static particles. For simplicity the diameters of these are made equal to the average particle diameter in the bulk of the flow, as it is not expected that the phenomena are much affected by the details of the roughness of the boundaries.

Lyon and L. G. Leal, J. Fluid Mech. 1998,363,25. D. Leighton and A. Acrivos, J. Fluid Mech. 1987, 181,415. J. C. A. L. R. Abbott, Phys. Fluids A, 1992, 4, 30. F. T. Jenkins, Advances in micromechanics ofgranular materials, Elsevier, New York, 1992, 381. R. F. Brady, J. Fluid Mech. 1994, 275, 157. M. F. Morris, J. Non-Newtonian Fluid Mech. 2006, 135, 149. J. L. Powell, Annual Rev. Fluid Mech. 2005, 37, 129. 11 S. Vahid. Migration and structure formation in sheared slurries, PhD thesis, Kingston University, UK, 2008.

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