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Basing on dry contact model of soft spheres the segregation processes of spherical and non-spherical particles were simulated using threes-dimensional discrete element methods（DEM）. Particle segregation mechanism was analyzed in view of force, torque and energy conversion between particles. Influence of segregation speed affected by particle size ratio was also discussed. The result shows that large particles are more active than small ones in segregation process, and non-spherical particles have higher energy, which makes up the influence of particle shape to segregation process to some extent, are more active than spherical particles. Average normal force, tangential force between large particles, their torque and kinetic energy are all greater than those of small particles. Particle segregation speed increases significantly with the increasing of size ratio. When the size ratio is greater than the critical value 3, the amplitude of increase in segregation speed will be slowed down.
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Keywords:
- discrete element method /
- non-spherical particle /
- segregation /
- numerical simulation
[1] ［1］Jiang Z H, Wang Y Y, Wu J 2006 Acta Phys. Sin. 55 4748 （in Chinese）［姜泽辉、王运鹰、吴晶 2006 55 4748］
[2] ［2］Liang X W, Li L S, Hou Z G, Lü Z, Yang L, Sun G, Shi Q F 2008 Acta Phys. Sin.57 2300 （in Chinese）［梁宣文、李粮生、侯兆国、吕震、杨雷、孙刚、史庆藩 2008 57 2300］
[3] ［3］Zhao Y M, Zhang S G, Jiao H G, Tie Z X 2006 J. China Univ. of Mining & Tech.35 586 （in Chinese）［赵跃民、张曙光、焦红光、铁占续 2006 中国矿业大学学报 35 586］
[4] ［4］Jiao H G, Zhao Y M, Wang Q Q 2006 J. China Univ. of Mining & Tech. （English Edition） 16 137
[5] ［5］Yin S R 1999 Ph. D. Dissertation （Xuzhou: China University of Mining &Technology） （in Chinese）［尹守仁 1999博士学位论文 （徐州:中国矿业大学）］
[6] ［6］Xu Y, Shun Q C, Zhang L, Huang W B 2003 Advances in Mechanics 33 251 （in Chinese）［徐泳、孙其诚、张凌、黄文彬 2003 力学进展 33 251］
[7] ［7］Zhu H P, Zhou Z Y, Yang R Y, Yu A B 2007 Chemical Engineering Science 62 3378
[8] ［8］Zhu H P, Zhou Z Y, Yang R Y, Yu A B 2008 Chemical Engineering Science 63 5728
[9] ［9］Cleary P W 2008 Powder Technology 179 144
[10] ］Fraige F Y, Langston P A, Chen G Z 2008 Powder Technology 186 224
[11] ］Cleary P W, Sawley M L 2002 Applied Mathematical Modelling 26 89
[12] ］Liffman K, Metcalfe G, Cleary P W 1997 Physical Review Letters 79 4574
[13] ］Cleary P W 1998 TASK Quarterly Journal 2 385
[14] ］Zhao Y Z, Jiang M Q, Zheng J 2009 Acta Phys. Sin. 58 1812 （in Chinese）［赵永志、江茂强、郑津 2009 58 1812］
[15] ］Langston P A, Awamleh M A, Fraige F Y, Asmar B N 2004 Chemical Engineering Science 59 425
[16] ］Oda M, Iwashita K, Kakiuchi T 1997 Importance of particle rotation in the mechanics of granular materials （Rotterdam: Balkema） p207
[17] ］Zhao Y Z, Jiang M Q, Xu P, Zheng J Y 2009 Acta Phys. Sin. 58 1819 （in Chinese）［赵永志、江茂强、徐平、郑津洋 2009 58 1819］
[18] ］Zhao Y Z, Cheng Y 2008 Acta Phys. Sin. 57 322 （in Chinese）［赵永志、程易 2008 57 322］
[19] ］Rosato A, Prinz F,Monte Carlo 1986 Powder Technology 49 59
[20] ］Rosato A D, Lan Y, wang D T 1991 Powder Technology 66 149
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[1] ［1］Jiang Z H, Wang Y Y, Wu J 2006 Acta Phys. Sin. 55 4748 （in Chinese）［姜泽辉、王运鹰、吴晶 2006 55 4748］
[2] ［2］Liang X W, Li L S, Hou Z G, Lü Z, Yang L, Sun G, Shi Q F 2008 Acta Phys. Sin.57 2300 （in Chinese）［梁宣文、李粮生、侯兆国、吕震、杨雷、孙刚、史庆藩 2008 57 2300］
[3] ［3］Zhao Y M, Zhang S G, Jiao H G, Tie Z X 2006 J. China Univ. of Mining & Tech.35 586 （in Chinese）［赵跃民、张曙光、焦红光、铁占续 2006 中国矿业大学学报 35 586］
[4] ［4］Jiao H G, Zhao Y M, Wang Q Q 2006 J. China Univ. of Mining & Tech. （English Edition） 16 137
[5] ［5］Yin S R 1999 Ph. D. Dissertation （Xuzhou: China University of Mining &Technology） （in Chinese）［尹守仁 1999博士学位论文 （徐州:中国矿业大学）］
[6] ［6］Xu Y, Shun Q C, Zhang L, Huang W B 2003 Advances in Mechanics 33 251 （in Chinese）［徐泳、孙其诚、张凌、黄文彬 2003 力学进展 33 251］
[7] ［7］Zhu H P, Zhou Z Y, Yang R Y, Yu A B 2007 Chemical Engineering Science 62 3378
[8] ［8］Zhu H P, Zhou Z Y, Yang R Y, Yu A B 2008 Chemical Engineering Science 63 5728
[9] ［9］Cleary P W 2008 Powder Technology 179 144
[10] ］Fraige F Y, Langston P A, Chen G Z 2008 Powder Technology 186 224
[11] ］Cleary P W, Sawley M L 2002 Applied Mathematical Modelling 26 89
[12] ］Liffman K, Metcalfe G, Cleary P W 1997 Physical Review Letters 79 4574
[13] ］Cleary P W 1998 TASK Quarterly Journal 2 385
[14] ］Zhao Y Z, Jiang M Q, Zheng J 2009 Acta Phys. Sin. 58 1812 （in Chinese）［赵永志、江茂强、郑津 2009 58 1812］
[15] ］Langston P A, Awamleh M A, Fraige F Y, Asmar B N 2004 Chemical Engineering Science 59 425
[16] ］Oda M, Iwashita K, Kakiuchi T 1997 Importance of particle rotation in the mechanics of granular materials （Rotterdam: Balkema） p207
[17] ］Zhao Y Z, Jiang M Q, Xu P, Zheng J Y 2009 Acta Phys. Sin. 58 1819 （in Chinese）［赵永志、江茂强、徐平、郑津洋 2009 58 1819］
[18] ］Zhao Y Z, Cheng Y 2008 Acta Phys. Sin. 57 322 （in Chinese）［赵永志、程易 2008 57 322］
[19] ］Rosato A, Prinz F,Monte Carlo 1986 Powder Technology 49 59
[20] ］Rosato A D, Lan Y, wang D T 1991 Powder Technology 66 149
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