551
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Zhou Z, Zhu H, Wright B, Yu A, Zulli P. Gas–solid flow in an ironmaking blast furnace-II: Discrete particle simulation. POWDER TECHNOL 2011. [DOI: 10.1016/j.powtec.2010.12.005] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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552
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Discrete element analysis of experiments on mixing and stoking of monodisperse spheres on a grate. POWDER TECHNOL 2011. [DOI: 10.1016/j.powtec.2010.12.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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553
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Balevičius R, Kačianauskas R, Mróz Z, Sielamowicz I. Analysis and DEM simulation of granular material flow patterns in hopper models of different shapes. ADV POWDER TECHNOL 2011. [DOI: 10.1016/j.apt.2010.12.005] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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554
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Shuai W, Xiang L, Huilin L, Guodong L, Jiaxing W, Pengfei X. Simulation of cohesive particle motion in a sound-assisted fluidized bed. POWDER TECHNOL 2011. [DOI: 10.1016/j.powtec.2010.10.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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555
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Belevičius R, Kačianauskas R, Markauskas D, Šešok D. Packing of Polydispersed Discs into Containers of Regular Shape. PARTICULATE SCIENCE AND TECHNOLOGY 2011. [DOI: 10.1080/02726351.2010.503323] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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556
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Kuang SB, Yu AB. Micromechanic modeling and analysis of the flow regimes in horizontal pneumatic conveying. AIChE J 2011. [DOI: 10.1002/aic.12480] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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557
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An extended DEM–CFD model for char combustion in a bubbling fluidized bed combustor of inert sand. Chem Eng Sci 2011. [DOI: 10.1016/j.ces.2010.10.011] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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558
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559
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Jiang XC, Zeng QH, Chen CY, Yu AB. Self-assembly of particles: some thoughts and comments. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm12213d] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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560
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561
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Abstract
Dense medium cyclone (DMC) is widely used in mineral industry to separate solids by density. It is simple in design but the flow pattern within it is complex due to the size and density distributions of the feed and process medium solids, and the turbulent vortex formed. Recently, the so-called combined computational fluid dynamics (CFD) and discrete element method (DEM) (CFD-DEM) was extended from two-phase flow to model the flow in DMCs at the University of New South Wales (UNSW). In the CFD-DEM model, the flow of coal particles is modelled by DEM and that of medium flow by CFD, allowing consideration of medium-coal mutual interaction and particle-particle collisions. In the DEM model, Newton's laws of motion are applied to individual particles, and in the CFD model the local-averaged Navier-Stokes equations combined with the volume of fluid (VOF) and mixture multiphase flow models are solved. The application to the DMC studies requires intensive computational effort. Therefore, various simplified versions have been proposed, corresponding to the approaches such as Lagrangian particle tracking (LPT) method where dilute phase flow is assumed so that the interaction between particles can be ignored, one-way coupling where the effect of particle flow on fluid flow is ignored, and the use of the concept of parcel particles whose properties are empirically determined. In this paper, the previous works on the modelling of DMCs at UNSW are summarized and the features and applicability of the models used are discussed.
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Affiliation(s)
- Kaiwei Chu
- Lab for Simulation and Modelling of Particulate Systems, School of Materials Science and Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
| | - Bo Wang
- Lab for Simulation and Modelling of Particulate Systems, School of Materials Science and Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
| | - Aibing Yu
- Lab for Simulation and Modelling of Particulate Systems, School of Materials Science and Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
| | - Andrew Vince
- Elsa Consulting Group Pty Ltd, PO Box 8100, Mt Pleasant, QLD 4740, Australia
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562
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Adam S, Suzzi D, Radeke C, Khinast JG. An integrated Quality by Design (QbD) approach towards design space definition of a blending unit operation by Discrete Element Method (DEM) simulation. Eur J Pharm Sci 2010; 42:106-15. [PMID: 21056102 DOI: 10.1016/j.ejps.2010.10.013] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2010] [Revised: 09/27/2010] [Accepted: 10/27/2010] [Indexed: 10/18/2022]
Abstract
A combined Quality by Design (QbD) and Discrete Element Model (DEM) simulation-approach is presented to characterize a blending unit operation by evaluating the impact of formulation parameters and process variables on the blending quality and blending end point. Understanding the variability of both the API and the excipients, as well as their impact on the blending process are critical elements for blending QbD. In a first step, the QbD-methodology is systematically used to (1) establish the critical quality attribute content uniformity and to link this CQA to its surrogate blend homogeneity, (2) identify potentially critical input factors that may affect blending operation quality and (3) risk-rank these factors to define activities for process characterization. Subsequently, a DEM-simulation-based characterization of the blending process is performed. A statistical evaluation is finally presented, relating blend homogeneity of systems with low particle number to the regulatory requirements. Data are then used to map out a three-dimensional knowledge space, providing parameters to define a design space and set up an appropriate control strategy.
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Affiliation(s)
- Siegfried Adam
- Research Center Pharmaceutical Engineering GmbH, Graz, Austria
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563
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564
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Roskilly SJ, Colbourn EA, Alli O, Williams D, Paul KA, Welfare EH, Trusty PA. Investigating the effect of shape on particle segregation using a Monte Carlo simulation. POWDER TECHNOL 2010. [DOI: 10.1016/j.powtec.2010.05.011] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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565
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Zhenghua H, Xiang L, Huilin L, Guodong L, Yurong H, Shuai W, Pengfei X. Numerical simulation of particle motion in a gradient magnetically assisted fluidized bed. POWDER TECHNOL 2010. [DOI: 10.1016/j.powtec.2010.06.022] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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566
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567
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Khirevich S, Daneyko A, Höltzel A, Seidel-Morgenstern A, Tallarek U. Statistical analysis of packed beds, the origin of short-range disorder, and its impact on eddy dispersion. J Chromatogr A 2010; 1217:4713-22. [DOI: 10.1016/j.chroma.2010.05.019] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2010] [Revised: 05/03/2010] [Accepted: 05/07/2010] [Indexed: 10/19/2022]
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568
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569
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Rosato AD, Dybenko O, Horntrop DJ, Ratnaswamy V, Kondic L. Microstructure evolution in density relaxation by tapping. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2010; 81:061301. [PMID: 20866410 DOI: 10.1103/physreve.81.061301] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2009] [Revised: 01/13/2010] [Indexed: 05/29/2023]
Abstract
The density relaxation phenomenon is modeled using both Monte Carlo and discrete element simulations to investigate the effects of regular taps applied to a vessel having a planar floor filled with monodisperse spheres. Results suggest the existence of a critical tap intensity which produces a maximum bulk solids fraction. We find that the mechanism responsible for the relaxation phenomenon is an evolving ordered packing structure propagating upwards from the plane floor.
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Affiliation(s)
- Anthony D Rosato
- Granular Science Laboratory, Department of Mechanical and Industrial Engineering, New Jersey Institute of Technology, Newark, New Jersey 07102, USA
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570
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Wang J, van der Hoef M, Kuipers J. CFD study of the minimum bubbling velocity of Geldart A particles in gas-fluidized beds. Chem Eng Sci 2010. [DOI: 10.1016/j.ces.2010.03.023] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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571
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572
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Pu W, Zhao C, Xiong Y, Liang C, Chen X, Lu P, Fan C. Numerical simulation on dense phase pneumatic conveying of pulverized coal in horizontal pipe at high pressure. Chem Eng Sci 2010. [DOI: 10.1016/j.ces.2009.12.025] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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573
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Abbas M, Climent E, Parmentier JF, Simonin O. Flow of particles suspended in a sheared viscous fluid: Effects of finite inertia and inelastic collisions. AIChE J 2010. [DOI: 10.1002/aic.12192] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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574
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Feng YQ, Yu AB. Effect of Bed Thickness on the Segregation Behavior of Particle Mixtures in a Gas Fluidized Bed. Ind Eng Chem Res 2010. [DOI: 10.1021/ie901478a] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Y. Q. Feng
- Laboratory for Computer Simulation and Modelling of Particulate Systems, School of Materials Science and Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
| | - A. B. Yu
- Laboratory for Computer Simulation and Modelling of Particulate Systems, School of Materials Science and Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
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575
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576
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Wu C, Cheng Y, Ding Y, Jin Y. CFD–DEM simulation of gas–solid reacting flows in fluid catalytic cracking (FCC) process. Chem Eng Sci 2010. [DOI: 10.1016/j.ces.2009.06.026] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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577
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Zhou Z, Yu A, Zulli P. A new computational method for studying heat transfer in fluid bed reactors. POWDER TECHNOL 2010. [DOI: 10.1016/j.powtec.2009.09.002] [Citation(s) in RCA: 98] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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578
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Xiang L, Shuyan W, Huilin L, Goudong L, Juhui C, Yikun L. Numerical simulation of particle motion in vibrated fluidized beds. POWDER TECHNOL 2010. [DOI: 10.1016/j.powtec.2009.08.016] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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579
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Dong X, Yu A. Numerical analysis of the heterogeneous gas–solid flow in fluidized beds. J Taiwan Inst Chem Eng 2009. [DOI: 10.1016/j.jtice.2009.05.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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580
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Zhu H, Hou Q, Zhou Z, Yu A. Averaging method of particulate systems and its application to particle-fluid flow in a fluidized bed. Sci Bull (Beijing) 2009. [DOI: 10.1007/s11434-009-0500-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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581
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582
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Garcia X, Akanji LT, Blunt MJ, Matthai SK, Latham JP. Numerical study of the effects of particle shape and polydispersity on permeability. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2009; 80:021304. [PMID: 19792116 DOI: 10.1103/physreve.80.021304] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2009] [Indexed: 05/28/2023]
Abstract
We study through numerical simulations the dependence of the hydraulic permeability of granular materials on the particle shape and the grain size distribution. Several models of sand are constructed by simulating the settling under gravity of the grains; the friction coefficient is varied to construct packs of different porosity. The size distribution and shapes of the grains mimic real sands. Fluid flow is simulated in the resulting packs using a finite element method and the permeability of the packs is successfully compared with available experimental data. Packs of nonspherical particles are less permeable than sphere packs of the same porosity. Our results indicate that the details of grain shape and size distribution have only a small effect on the permeabilty of the systems studied.
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Affiliation(s)
- Xavier Garcia
- Department of Earth Science and Engineering, Imperial College London, SW72AZ London, United Kingdom.
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583
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Kuang SB, Yu AB, Zou ZS. Computational Study of Flow Regimes in Vertical Pneumatic Conveying. Ind Eng Chem Res 2009. [DOI: 10.1021/ie900230s] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- S. B. Kuang
- Lab for Simulation and Modelling of Particulate Systems, School of Materials Science and Engineering, The University of New South Wales, Sydney, NSW 2052, Australia, and School of Materials Science and Metallurgy, Northeastern University, Shenyang, Liaoning 110004, P. R. China
| | - A. B. Yu
- Lab for Simulation and Modelling of Particulate Systems, School of Materials Science and Engineering, The University of New South Wales, Sydney, NSW 2052, Australia, and School of Materials Science and Metallurgy, Northeastern University, Shenyang, Liaoning 110004, P. R. China
| | - Z. S. Zou
- Lab for Simulation and Modelling of Particulate Systems, School of Materials Science and Engineering, The University of New South Wales, Sydney, NSW 2052, Australia, and School of Materials Science and Metallurgy, Northeastern University, Shenyang, Liaoning 110004, P. R. China
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584
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Wang J. A Review of Eulerian Simulation of Geldart A Particles in Gas-Fluidized Beds. Ind Eng Chem Res 2009. [DOI: 10.1021/ie900247t] [Citation(s) in RCA: 105] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Junwu Wang
- Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
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585
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Idler V, Sánchez I, Paredes R, Gutiérrez G, Reyes LI, Botet R. Three-dimensional simulations of a vertically vibrated granular bed including interstitial air. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2009; 79:051301. [PMID: 19518443 DOI: 10.1103/physreve.79.051301] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2009] [Indexed: 05/27/2023]
Abstract
We present a numerical study of the effect of interstitial air on a vertically vibrated granular bed within one period of oscillation. We use a three-dimensional molecular-dynamics simulation including air phenomenologically. The simulations are validated with experiments made with spherical glass beads in a rectangular container. After validation, results are reported for a granular column of 9000 grains and approximately 50 layers deep (at rest), agitated with a sinusoidal excitation with maximal acceleration 4.7g at 11.7 Hz. We report the evolution of density, granular temperature, and coordination number within a vibration cycle, and the effect of interstitial air on those parameters. In three-dimensional computer simulations we found that the presence of interstitial air can promote the collective motion of the granular material as a whole.
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Affiliation(s)
- V Idler
- Centro de Física, Instituto Venezolano de Investigaciones Científicas, Apartado Postal 21827, Caracas 1020-A, Venezuela.
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586
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Lim EWC. Vibrated granular bed on a bumpy surface. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2009; 79:041302. [PMID: 19518219 DOI: 10.1103/physreve.79.041302] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2008] [Revised: 02/01/2009] [Indexed: 05/27/2023]
Abstract
We investigate effects of physical characteristics of the vibrating base in a vibrated granular bed system on the bulk granular behavior of the bed using molecular dynamics simulations. With a vibrating base that exhibits low coefficient of restitution for particle-base collisions, a monolayer of granular materials was observed to form dynamically on the surface of the base. Such a system was shown to be both qualitatively and quantitatively equivalent to one with a bumpy base composed of discrete solid particles undergoing the same type of imposed oscillatory motion. The "bumpiness" of such a base, as defined by the size of particles constituting the vibrating base, was also found to have insignificant effects on the behavior of the bulk granular materials. The observations made in this study may point toward a possible methodology to model vibrating granular bed systems with inelastic bases using continuum theories.
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Affiliation(s)
- Eldin Wee Chuan Lim
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117576, Singapore.
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587
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Zhou ZY, Yu AB, Zulli P. Particle scale study of heat transfer in packed and bubbling fluidized beds. AIChE J 2009. [DOI: 10.1002/aic.11823] [Citation(s) in RCA: 211] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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