风沙电场对运动沙粒带电量的影响
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- 英文论文题名：Effect of Environmental E-field on the Eind-blown Sand Electrification
- 论文作者：李兴财
- 英文论文作者：Li Xingcai ; Ningxia Key Laboratory of Intelligent Sensing for the Desert Information ; Ningxia University ; School of Physics & Electrical Information Engineering ; Ningxia University
- 年：2015
- 作者机构：宁夏大学物理电气信息学院宁夏沙漠信息智能感知重点实验室;兰州大学西部灾害与环境力学教育部重点实验室;
- 论文关键词：风沙电现象 ; 起电机制 ; 离子交换 ; 静电感应
- 英文论文关键词：wind-blown sand electric field ; charging mechanism ; ion transfer ; inductive
- 会议召开时间：2015-08-12
- 会议录名称：静电放电：从地面新技术应用到空间卫星安全防护—中国物理学会第二十届全国静电学术会议论文集
- 语种：中文
- 分类号：O441.1
- 学会代码：WLJD
- 会议名称：静电放电 ; 从地面新技术应用到空间卫星安全防护—中国物理学会第二十届全国静电学术会议
- 会议地点：中国河北石家庄
- 主办单位：中国物理学会静电专业委员会
- 学会名称：中国物理学会静电专业委员会
- 页数：5
- 文件大小：498k
- 原文格式：D
- 会议级别：全国
摘要
本文研究风沙电场强度对沙粒带电量的影响程度,为建立更符合实际条件的风沙电现象起电机制提供依据。在已有离子交换模型的基础上,补充了环境电场对沙粒接触起电量的影响机制模型,并通过数值方法讨论环境电场对沙粒起电量的影响。得出结果:相互接触的颗粒分离后也会携带大量净电荷,且其带电量随着环境电场的增强而增大,随着粒径比和颗粒接触角的增加而减小。因此风沙运动过程中风沙电场会显著增加沙粒的带电量,因此在沙粒带电量及风沙输运的理论预测模型中不仅要考虑沙粒间的碰撞起电,还必须考虑环境静电场的影响。
To study the effect of the wind-blown sand electric field on the electrification process of moving sands,and to provide a basis for the research on the mechanism of wind-blown sand electric field.Based on the model of ion transfer mechanism,we additionally consider the effect from the polarization by environmental electric field,especially from the wind-blown sand electric field.Through some numerical simulation,we discussed the effect of the electric intensity,size ratio,and the contact angle,on the particle’s electrostatic charge.The particle became charged after contact with other particles in a strong electric field,and the electrostatic charge increased with the intensity of electric field increasing,and decreased with the size ratio and the contact angle increasing.The electric field in wind-blown sand can enhance the electrification,and in the prediction research of wind-blown sand electric field and the sand’s transport during near-ground saltation and creep as well as during turbulent sand storm transport,we must consider the inductive charging mechanism.
To study the effect of the wind-blown sand electric field on the electrification process of moving sands,and to provide a basis for the research on the mechanism of wind-blown sand electric field.Based on the model of ion transfer mechanism,we additionally consider the effect from the polarization by environmental electric field,especially from the wind-blown sand electric field.Through some numerical simulation,we discussed the effect of the electric intensity,size ratio,and the contact angle,on the particle’s electrostatic charge.The particle became charged after contact with other particles in a strong electric field,and the electrostatic charge increased with the intensity of electric field increasing,and decreased with the size ratio and the contact angle increasing.The electric field in wind-blown sand can enhance the electrification,and in the prediction research of wind-blown sand electric field and the sand’s transport during near-ground saltation and creep as well as during turbulent sand storm transport,we must consider the inductive charging mechanism.
引文
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[16]D.J.Lacks.Particle clouds:Frictile attraction[J].nature physics,2010,6(5):324-325.
[17]L.Xie,K.Han,Y.Ma,et al.An electrification mechanism of sand grains based on the diffuse double layer and Hertz contact theory[J].Applied Physics Letters,2013,103(10):104103.
[18]W.Hu,L.Xie,X.Zheng.Contact charging of silica glass particles in a single collision[J].Applied Physics Letters,2012,101(11):114107.
[19]L.Xie,G.Li,N.Bao,et al.Contact electrification by collision of homogenous particles[J].Journal of Applied Physics,2013,113(18):184908.
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[21]J.Latham,B.J.Mason.Electrical Charging of Hail Pellets in a Polarizing Electric Field[J].Proceedings of the Royal Socity of London.Series A.Mathematical and Physical,1962,266(1326):387-401.
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[2]J.Latham.the electrification of snow storms and sandstorms[J].Q.J.R.Meteorol Soc,1964,90(91~95.
[3]D.S.Schmidt,R.S.Schmidt.Electrostatic force on saltating sand[J].Journal of Geophysical Resarch,1998,103(8997-9001.
[4]J.J.Qu,M.H.Yan,G.G.Dong,et al.Wind tunnel simulation experiment and investigation on the electrification of sandstorms[J].Science in China Series D-Earth Sciences,2004,47(6):529-539.
[5]T.J.Jackson,W.M.Farrell.Electrostatic fields in dust devils an analog to Mars[J].IEEE transactions on Geoscience and Remote Sensing,2006,44(10):2942-2949.
[6]T.-L.Bo,X.-J.Zheng.A field observational study of electrification within a dust storm in Minqin,China[J].Aeolian Research,2013,8(39-47.
[7]X.J.Zheng,N.Huang,Y.H.Zhou.Laboratory measurement of electrification of wind-blown sands and simulation of its effect on sand saltation movement[J].Journal of Geophysical Research-Space Physics,2003,108(D10):4322.
[8]S.Desch.The Generation of Lightning in the Solar Nebula[J].Icarus,2000,143(1):87-105.
[9]N.Duff,D.J.Lacks.Particle dynamics simulations of triboelectric charging in granular insulator systems[J].Journal of electrostatics,2008,66(1-2):51-57.
[10]D.Lacks,N.Duff,S.Kumar.Nonequilibrium Accumulation of Surface Species and Triboelectric Charging in Single Component Particulate Systems[J].Physical Review Letters,2008,100(18):
[11]J.Lowell,A.C.Rose-Innes.Contact electrification[J].Advances in Physics,1980,29(6):947-1023.
[12]J.F.Kok,N.O.Renno.Electrostatics in wind-blown sand[J].Physical Review Letters,2008,100(014501.
[13]鲁录义,顾兆林,罗昔联,等.一种风沙运动的颗粒动力学静电起电模型[J].物理学报,2008,57(11):6939-6945.Lu Lu-Yi,Gu Zhaolin,Luo Xi Lian,et al.An electrostatic dynamic model for wind-blown sand systems,Acta Physics Sinica,57(11):6939-6945
[14]J.F.Kok,D.J.Lacks.Electrification of granular systems of identical insulators[J].Physical Review E,2009,79(051304.
[15]T.Pahtz,H.J.Herrmann,T.Shinbrot.Why do particle clouds generate electric charges[J].Nature physics,2010,6(364-368.
[16]D.J.Lacks.Particle clouds:Frictile attraction[J].nature physics,2010,6(5):324-325.
[17]L.Xie,K.Han,Y.Ma,et al.An electrification mechanism of sand grains based on the diffuse double layer and Hertz contact theory[J].Applied Physics Letters,2013,103(10):104103.
[18]W.Hu,L.Xie,X.Zheng.Contact charging of silica glass particles in a single collision[J].Applied Physics Letters,2012,101(11):114107.
[19]L.Xie,G.Li,N.Bao,et al.Contact electrification by collision of homogenous particles[J].Journal of Applied Physics,2013,113(18):184908.
[20]X.Zheng,R.Zhang,H.Huang.Theoretical modeling of relative humidity on contact electrification of sand particles[J].Sci Rep,2014,4(4399.
[21]J.Latham,B.J.Mason.Electrical Charging of Hail Pellets in a Polarizing Electric Field[J].Proceedings of the Royal Socity of London.Series A.Mathematical and Physical,1962,266(1326):387-401.
[22]M.H.Davis.two charged spherical conductors in a uniform electric field forces and field strength[J].quarterly journal of mechanics and applied mathematics,1964,XVII(4):500-511.
[23]A.Ziv,Z.Levin.Thundercloud Electrification Cloud Growth and Electrical Development[J].Journal of The Atmospheric Science,1974,31(1652-1661.