热扩散和电场对风沙流发展过程的影响

岳高伟; 郑晓静

热扩散和电场对风沙流发展过程的影响

西部环境教育部重点实验室,兰州大学力学系,兰州 730000

基金项目: 科技部国家重点基础研究发展规划项目(G2000048702);教育部重点科技项目资助课题

详细信息

作者简介:
岳高伟(1977- ),男,河南临颖人,博士研究生,主要从事风沙两相流体动力学研究;郑晓静(1958- ),女,教授,博士生导师,研究方向:工程问题的建模与仿真(联系人.Tel:+86-931-8912112;Fax:+86-931-8625576;E-mail:xjzheng@lzu.edu.cn)

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出版历程
- 收稿日期: 2005-01-11
- 修回日期: 2006-10-24
- 刊出日期: 2007-02-15

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

摘要

摘要: 建立了描述在来流水平风场和由于地表热扩散产生的垂向风场联合作用下的风沙流发展过程的基本方程．通过定量分析表明：地表热扩散和风沙电场对风沙流发展过程的影响十分明显．在此基础上，给出地表热扩散和风沙电场对风沙流中的沙粒跃移轨迹、输沙率以及风沙流达到充分发展的时间等的影响规律．
- 热扩散 /
- 输沙率 /
- 风沙电场 /
- 跃移运动 /
- 多场耦合
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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参考文献(17)

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热扩散和电场对风沙流发展过程的影响

作者简介:
岳高伟(1977- ),男,河南临颖人,博士研究生,主要从事风沙两相流体动力学研究;郑晓静(1958- ),女,教授,博士生导师,研究方向:工程问题的建模与仿真(联系人.Tel:+86-931-8912112;Fax:+86-931-8625576;E-mail:xjzheng@lzu.edu.cn)

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

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热扩散和电场对风沙流发展过程的影响

作者简介: 岳高伟(1977- ),男,河南临颖人,博士研究生,主要从事风沙两相流体动力学研究;郑晓静(1958- ),女,教授,博士生导师,研究方向:工程问题的建模与仿真(联系人.Tel:+86-931-8912112;Fax:+86-931-8625576;E-mail:xjzheng@lzu.edu.cn)

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出版历程

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

计量

出版历程

目录

作者简介:
岳高伟(1977- ),男,河南临颖人,博士研究生,主要从事风沙两相流体动力学研究;郑晓静(1958- ),女,教授,博士生导师,研究方向:工程问题的建模与仿真(联系人.Tel:+86-931-8912112;Fax:+86-931-8625576;E-mail:xjzheng@lzu.edu.cn)