转速对三维滚筒内颗粒混合特性的影响
Influence of rotating velocity on particle mixing characteristics in a three-dimensional tumbler

DOI: 10.7523/j.issn.2095-6134.2017.02.015

Keywords: 滚筒,颗粒,混合,离散元方法,信息熵
rotating drum,particle,mixing,discrete element method,information entropy

Full-Text   Cite this paper   Add to My Lib

Abstract:

摘要 借助开源软件OpenFOAM中的离散元方法软球模型，分别模拟5种典型转速下三维滚筒内的碳球颗粒混合过程。分析研究滚筒内颗粒流态随时间的演化过程，展示不同颗粒流态下的颗粒混合结构特性。借助信息熵和新的混合指数，即差值函数，定量地研究滚筒转速对颗粒混合特性的影响。

References

[1]	Sato Y, Nakamura H, Watano S. Numerical analysis of agitation torque and particle motion in a high shear mixer[J]. Powder Technology, 2008, 186(2):130-136.
[2]	Soni R K, Mohanty R, Mohanty S, et al. Numerical analysis of mixing of particles in drum mixers using DEM[J]. Advanced Powder Technology, 2016, 27(2):531-540.
[3]	Maione R, De Richter S K, Mauviel G, et al. DEM investigation of granular flow and binary mixture segregation in a rotating tumbler:influence of particle shape and internal baffles[J]. Powder Technology, 2015, 286:732-739.
[4]	Lai F S, Fan L T. Application of a discrete mixing model to the study of mixing of multicomponent solid particles[J]. Industrial & Engineering Chemistry Process Design and Development, 1975, 14(4):403-411.
[5]	Schutyser M A I, Weber F J, Briels W J, et al. Three-dimensional simulation of grain mixing in three different rotating drum designs for solid-state fermentation[J]. Biotechnology and Bioengineering, 2002, 79(3):284-294.
[6]	Schutyser M A I, Padding J T, Weber F J, et al. Discrete particle simulations predicting mixing behavior of solid substrate particles in a rotating drum fermenter[J]. Biotechnology and bioengineering, 2001, 75(6):666-675.
[7]	Masiuk S, Rakoczy R. The entropy criterion for the homogenisation process in a multi-ribbon blender[J]. Chemical Engineering and Processing:Process Intensification, 2006, 45(6):500-506.
[8]	Metcalfe G, Shinbrot T, McCarthy JJ, et al. Avalanche mixing of granular solids[J]. 1995:39-41.
[9]	Mellmann J. The transverse motion of solids in rotating cylinders:forms of motion and transition behavior[J]. Powder Technology, 2001, 118(3):251-270.
[10]	Vargas W L, McCarthy J J. Heat conduction in granular materials[J]. AIChE Journal, 2001, 47(5):1052-1059.
[11]	Gui N, Fan J R, Cen K F. A macroscopic and microscopic study of particle mixing in a rotating tumbler[J]. Chemical Engineering Science, 2010, 65(10):3034-3041.
[12]	Yang S, Cahyadi A, Wang J, et al. DEM study of granular flow characteristics in the active and passive regions of a three-dimensional rotating drum[J]. AIChE Journal, 2016, 62(11):3874-3888.
[13]	Ardekani A M, Rangel R H. Numerical investigation of particle-particle and particle-wall collisions in a viscous fluid[J]. Journal of fluid mechanics, 2008, 596:437-466.
[14]	Weerasekara N S, Powell M S, Cleary P W, et al. The contribution of DEM to the science of comminution[J]. Powder technology, 2013, 248:3-24.
[15]	Arntz M, Den Otter W K, Briels W J, et al. Granular mixing and segregation in a horizontal rotating drum:a simulation study on the impact of rotational speed and fill level[J]. AIChE Journal, 2008, 54(12):3133-3146.
[16]	葛良,桂南,徐文凯,等. 波形滚筒内颗粒混合和导热分布形态特性的研究[J]. 中国科学:技术科学, 2014(1):62-70.
[17]	Gui N, Fan J. Numerical study of heat conduction of granular particles in rotating wavy drums[J]. International Journal of Heat and Mass Transfer, 2015, 84:740-751.
[18]	Gui N, Yang X, Tu J, et al. Numerical simulation and analysis of particle mixing and conduction in wavy drums[J]. Drying Technology, 2016, 34(1):91-104.
[19]	Wightman C, Moakher M, Muzzio F J, et al. Simulation of flow and mixing of particles in a rotating and rocking cylinder[J]. AIChE journal, 1998, 44(6):1266-1276.
[20]	Siiri？ S, Yliruusi J. Determining a value for mixing:mixing degree[J]. Powder Technology, 2009, 196(3):309-317.
[21]	Ayeni OO, Wu CL, Joshi JB, et al. A discrete element method study of granular segregation in non-circular rotating drums[J]. Powder Technology, 2015, 283:549-560.
[22]	Wen Y, Liu M, Liu B, et al. Comparative study on the characterization method of particle mixing index using DEM method[J]. Procedia Engineering, 2015, 102:1630-1642.
[23]	Tsuji Y, Tanaka T, Ishida T. Lagrangian numerical simulation of plug flow of cohesionless particles in a horizontal pipe[J]. Powder technology, 1992, 71(3):239-250.
[24]	Mishra B K. A review of computer simulation of tumbling mills by the discrete element method:part I-Contact mechanics[J]. International journal of mineral processing, 2003, 71(1):73-93.
[25]	Mishra BK. A review of computer simulation of tumbling mills by the discrete element method:Part Ⅱ-Practical applications[J]. International Journal of Mineral Processing, 2003, 71(1):95-112.
[26]	Boateng A A. Rotary kilns:transport phenomena and transport processes[M]. Burlington:Butterworth-Heinemann, 2008.
[27]	桂南. 复杂两相流动中颗粒碰撞的DEM-LES/DNS耦合模拟研究[D]. 杭州:浙江大学, 2010.
[28]	Shannon C E. Weaver W. The mathematical theory of communication[M]. Urbana, Illinois:University of Illinois Press, 1949.

Full-Text