椭球颗粒搅拌运动及混合特性的数值模拟研究

刘扬; 韩燕龙; 贾富国; 姚丽娜; 王会; 史宇菲

doi:10.7498/aps.64.114501

摘要

为探讨在强制搅拌下同属性颗粒由分层到分布均匀状态的运动特征及规律, 本研究利用三维离散单元法模拟不同转速下U形罐体内等粒径椭球颗粒的混合过程. 从单颗粒随机运动轨迹、宏观颗粒流运动矢量图的角度分析颗粒混合过程的宏观混合规律及局部混合特征, 定量描述混合度与搅拌叶片旋转圈数的数学关系. 结果表明, 强制搅拌下同属性分层颗粒的混合是在对流混合及四个局部混合共同作用下实现的; 分层颗粒的混合度与搅拌轴的转速无关, 而与搅拌轴旋转圈数直接相关; 混合度与圈数的关系符合指数增长模型. 研究结果可为散体物料增混行业的设备改进及操作控制提供依据和参考.

关键词:

Abstract

To investigate the motion characteristics and the law of identical property for particles obtained under segregation to uniform distribution conditions in forced agitation mixing, the mixing process of the same sized ellipsoidal particles at different rotating speeds in a U-tank is simulated using three-dimensional discrete element method. Macroscopic mixing law and partial mixing characteristics in particle mixing process are analysed in the view of single particle random motion trajectory and motion vector diagram of macroscopic particle flow. And the mathematical relation between mixability and revolutions of agitating blades is described quantitatively. Results show that convective mixing and four partial mixing characteristics control the mixing homogeneity process of identical property of segregation particles in forced agitation mixing. Mixability of segregation particles is independent of rotating speed of the agitating shaft, but has a direct correlation with revolutions. The relation between mixability and revolutions agrees with the exponential growth model. Research results can provide the basis and reference for equipment improvement and operating control of bulk material in the industry of the augmenting of mix.

Keywords:

作者及机构信息

1.
东北农业大学工程学院, 哈尔滨 150030

基金项目: 黑龙江省自然科学基金(批准号:E201322)、哈尔滨市优秀学科带头人基金(批准号:RC2013XK006004)、北方寒地现代农业装备技术重点实验室开放课题资助(批准号:548008)和哈尔滨市应用技术研究与开发项目(批准号:2013DB2BG005)资助的课题.

Authors and contacts

1.
Department of Engineering, Northeast Agricultural University, Harbin 150030, China

Funds: Project supported by the Natural Science Foundation of Heilongjiang Province, China (Grant No. E201322), the Harbin Foundation for Outstanding Academic Leaders, China (Grant No. RC2013XK006004), the Modern Agricultural Equipment Technology Key Laboratory Open Project Funding of Northern Cold Region, China (Grant No. 548008), and the Application of Technology Research and Development Project of Harbin, China(Grant No. 2013DB2BG005).

参考文献

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[10]	Lemieux M, Bertrand F, Chaouki J, Gosselin P 2007 Chem. Eng. Sci. 62 1783
[11]	Kwapinska M, Saage G, Tsotsas E 2006 Powder Technol. 161 69
[12]	Dubey A, Hsia H, Saranteas K, Brone D, Misra T, Muzzio F J 2011 Chem. Eng. Sci. 66 5107
[13]	Grajales L M, Xavier N M, Henrique J P, Thomeo J C 2012 Powder Technol. 222 167
[14]	Hou Q F, Dong K J, Yu A B 2014 Powder Technol. 256 529
[15]	Chandratilleke C R, Yu A B, Bridgwater J 2012 Chem. Eng. Sci. 79 54
[16]	Ren B, Shao Y J, Zhong WQ, Jin B S, Yuan Z L, Lu Yong 2012 Powder Technol. 222 85
[17]	Wu D P, Li X X, Qin Q, Guan B, Zang Y 2014 Acta Phys. Sin. 63 098201 (in Chinese) [吴迪平, 李星祥, 秦勤, 管奔, 臧勇 2014 63 098201]
[18]	Han Y L, Jia F G, Tang Y R, Liu Y, Zhang Q 2014 Acta Phys. Sin. 63 174501 (in Chinese) [韩燕龙, 贾富国, 唐玉荣, 刘扬, 张强 2014 63 174501]
[19]	Hu G M 2010 Analysis and Simulation of Granular System by Discrete Element Method Using EDEM (Wuhan:Wuhan University of Technology Press) p301 (in Chinese) [胡国明 2010 颗粒系统的离散元素法分析仿真(武汉:武汉理工大学出版社) 第301页]
[20]	Wang R F, Li Z Y, Dou R B, Guo J Z 2013 Trans. CSAM. 44 93 (in Chinese) [王瑞芳, 李占勇, 窦如彪, 郭建忠 2013 农业机械学报 44 93]
[21]	Mellmann J, 2001 Powder Technol. 118 251
[22]	McCarthy J J, Khakhar D V, Ottino J M 2000 Powder Technol. 109 72
[23]	Cisar S E, Ottno J M 2007 AIChE J. 53 1151
[24]	Sudah O S, Coffin-Beach D, Muzzio F J 2002 Powder Technol. 126 191
[25]	Zhou Y C, Yu A B, Bridgwater J 2003 J. Chem. Technol. Biotechnol. 78 187
[26]	Gao H L, Chen Y C, Zhao Y Z, Zheng J Y 2011 Acta Phys. Sin. 60 124501 (in Chinese) [高红利, 陈友川, 赵永志, 郑津洋 2011 60 124501]

施引文献

[1]	Chan K W, Kwan A K H 2014 particuology 16 108
[2]	Ouyang H W, Huang S C, Liu Z M, Wang Q 2009 Rare Met. Mater. Eng. 38 1310 (in Chinese) [欧阳鸿武, 黄誓成, 刘卓民, 王琼 2009 稀有金属材料与工程 38 1310]
[3]	Khalilitehrani M, Abrahamsson P J, Rasmuson A 2014 Powder Technol. 263 45
[4]	Abdul Q, Shi Q F, Liang X W, Sun G 2010 Chin. Phys. B 19 034601
[5]	Cleary P W, 2013 Powder Technol. 248 1035
[6]	Radl S, Brandl D, Heimburg H, Glasser B J, Khinast J G 2012 Powder Technol. 226 199
[7]	ZhaoL L 2010 Ph. D. Dissertation (Xuzhou:China University of Mining And Technology) (in Chinese) [赵啦啦 2010 博士学位论文(徐州:中国矿业大学)]
[8]	Demagh Y, Moussa H B, Lachi M, Noui S, Bordja L 2012 Powder Technol. 224 260
[9]	Conway S L, Lekhal A, Khinast J G, Glasser B J 2005 Chem. Eng. Sci. 60 7091
[10]	Lemieux M, Bertrand F, Chaouki J, Gosselin P 2007 Chem. Eng. Sci. 62 1783
[11]	Kwapinska M, Saage G, Tsotsas E 2006 Powder Technol. 161 69
[12]	Dubey A, Hsia H, Saranteas K, Brone D, Misra T, Muzzio F J 2011 Chem. Eng. Sci. 66 5107
[13]	Grajales L M, Xavier N M, Henrique J P, Thomeo J C 2012 Powder Technol. 222 167
[14]	Hou Q F, Dong K J, Yu A B 2014 Powder Technol. 256 529
[15]	Chandratilleke C R, Yu A B, Bridgwater J 2012 Chem. Eng. Sci. 79 54
[16]	Ren B, Shao Y J, Zhong WQ, Jin B S, Yuan Z L, Lu Yong 2012 Powder Technol. 222 85
[17]	Wu D P, Li X X, Qin Q, Guan B, Zang Y 2014 Acta Phys. Sin. 63 098201 (in Chinese) [吴迪平, 李星祥, 秦勤, 管奔, 臧勇 2014 63 098201]
[18]	Han Y L, Jia F G, Tang Y R, Liu Y, Zhang Q 2014 Acta Phys. Sin. 63 174501 (in Chinese) [韩燕龙, 贾富国, 唐玉荣, 刘扬, 张强 2014 63 174501]
[19]	Hu G M 2010 Analysis and Simulation of Granular System by Discrete Element Method Using EDEM (Wuhan:Wuhan University of Technology Press) p301 (in Chinese) [胡国明 2010 颗粒系统的离散元素法分析仿真(武汉:武汉理工大学出版社) 第301页]
[20]	Wang R F, Li Z Y, Dou R B, Guo J Z 2013 Trans. CSAM. 44 93 (in Chinese) [王瑞芳, 李占勇, 窦如彪, 郭建忠 2013 农业机械学报 44 93]
[21]	Mellmann J, 2001 Powder Technol. 118 251
[22]	McCarthy J J, Khakhar D V, Ottino J M 2000 Powder Technol. 109 72
[23]	Cisar S E, Ottno J M 2007 AIChE J. 53 1151
[24]	Sudah O S, Coffin-Beach D, Muzzio F J 2002 Powder Technol. 126 191
[25]	Zhou Y C, Yu A B, Bridgwater J 2003 J. Chem. Technol. Biotechnol. 78 187
[26]	Gao H L, Chen Y C, Zhao Y Z, Zheng J Y 2011 Acta Phys. Sin. 60 124501 (in Chinese) [高红利, 陈友川, 赵永志, 郑津洋 2011 60 124501]

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