Effect of Thermal Diffusion and Electrostatic Force on the Evolution of Wind-Blown Sand Flow

YUE Gao-wei; ZHENG Xiao-jing

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Article Navigation > Applied Mathematics and Mechanics > 2007 > 28(2): 165-175

YUE Gao-wei, ZHENG Xiao-jing. Effect of Thermal Diffusion and Electrostatic Force on the Evolution of Wind-Blown Sand Flow[J]. Applied Mathematics and Mechanics, 2007, 28(2): 165-175.

Citation:

YUE Gao-wei, ZHENG Xiao-jing. Effect of Thermal Diffusion and Electrostatic Force on the Evolution of Wind-Blown Sand Flow[J]. Applied Mathematics and Mechanics, 2007, 28(2): 165-175.

Citation:

YUE Gao-wei, ZHENG Xiao-jing. Effect of Thermal Diffusion and Electrostatic Force on the Evolution of Wind-Blown Sand Flow[J]. Applied Mathematics and Mechanics, 2007, 28(2): 165-175.

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Effect of Thermal Diffusion and Electrostatic Force on the Evolution of Wind-Blown Sand Flow

Key Laboratory of Western China's Environmental Systems, Department of Mechanics, Lanzhou University, Lanzhou 730000, P. R. China

Received Date: 2005-01-11
Rev Recd Date: 2006-10-24
Publish Date: 2007-02-15

Abstract

Abstract

A theor etical model was suggested to mathematically describe the effect of thermal diffusion from a sand-bed on evolution of a wind-blown sand flow.An upward wind field was engendered by the thermal diffusion and the coupling interaction among the horizontal and upward wind flow,saltating grains,and a kind of electr ostatic force exerted on the grains were considered in this theoretical model.The numerical results show that the effect of the thermal diffusion on the evolution process of wind-blowngrain flow is quite obvious and very similar to the effect of the electrostatic force on the evolution.Notonly the time for the entire system to reach a stea dy state (called the duration time ),the transportrate of gr ains,the mass-flux profiles and the trajectory of saltating grains are affected by the thermal diffusion and the electr ostatic force exerted on saltating grains,but also the wind profiles and the temper ature profiles at the steady state are affected by the wind-blown sand flow.
- thermal diffusion,
- transpor trate of grains,
- electr ostatic field,
- wind-blown grains,
- multifield coupling

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References(17)

References

[1]	姚德良，张强，李家春，等.高寒草旬地区陆面过程观测及耦合模式研究[J].应用数学和力学，2004，25(5)：446-454.
[2]	董飞，刘大有，贺大良.风沙运动的研究进展和发展趋势[J].力学进展,1995,25(3):368-391.
[3]	王柏懿，陈强，戚隆溪.可侵蚀地表上方含尘大气运动的数值模型[J].力学学报，2004，36(3):265-271.
[4]	Li Z S,Ni J R.Sidewall effect of wind tunnel on aeolian sediment transport[R]. International Center for Arid and Semiarid Studies, Texas Tech University, Lubbock, Texas, USA,2002:45-49.
[5]	DONG Zhi-bao,LIU Xiao-ping,WANG Hong-tao,et al.Aeolian sand transport: a wind tunnel model[J].Sedimentary Geology,2003，161：71-83.(DOI:10.1016/S6037-0738(03)00396-2)
[6]	Gerety K M,Slingerland R.Nature of the saltating population in wind tunnel experiments with heterogeneous size density sand[J].Development in Sedimentology,1983,38:115-131. doi: 10.1016/S0070-4571(08)70792-1
[7]	Rasmussen K R,Mikkelsen H E.On the efficiency of vertical array aeolian filed traps[J].Sedimentology,1998,45(4):789-800. doi: 10.1046/j.1365-3091.1998.00179.x
[8]	Nalpanis P,Hunt J C R,Barrett C F.Saltating particles over flat beds[J].J Fluid Mech,1993,251:661-685. doi: 10.1017/S0022112093003568
[9]	Anderson R S,Haff P K.Wind modification and bed response during saltation of sand in air[J].Acta Mech,1991,1(Supp):21-25.
[10]	Shao Y,Raupach M R.The overshoot and equilibration of saltation[J].J Geophys Res,1992,97(D18):20559-20564. doi: 10.1029/92JD02011
[11]	Butterfield G R.Near bed mass flux profiles in aeolian sand transport: high-resolution measurement in a wind tunnel[J].Earth Surface Processes and landforms,1999,24(5):393-412. doi: 10.1002/(SICI)1096-9837(199905)24:5<393::AID-ESP996>3.0.CO;2-G
[12]	ZHENG Xiao-jing,HE Li-hong,WU Jian-jun.Vertical profiles of mass flux for windblown sand movement at steady state[J].J Geoph R,2004,109：B01106.(DIO:10.1029/2003JB002656)
[13]	Zheng X J,Huang N,Zhou Y H.Laboratory measurement of electrification of wind-blown sands and simulation of its effect on sand saltation movement[J].J Geophy Res,2003.108(D10):4322.(DIO:10.1029/2002JD002572)
[14]	Zheng X J,Huang N，Zhou Y Y.The effect of electrostatic force on the evolution of sand saltation cloud[J].The European Physical Journal E,2006,19:129-138. doi: 10.1140/epje/e2006-00020-9
[15]	Haltiner G J.Numerical Weather Prediction[M].New York:John & Sons Inc,1971.
[16]	郑晓静，岳高伟.地表温度对颗粒跃移轨迹的影响[J].应用力学学报，2005，22（2）：207-211.
[17]	Schmidt D S, Schmidt R A，Dent J D. Electrostatic force on saltating sand[J].J Geophy Res,1998,103:8997-9001. doi: 10.1029/98JD00278