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中国沙漠 ›› 2002, Vol. 22 ›› Issue (3): 237-241.

• 研究论文 • 上一篇    下一篇

含尘大气近地层流底层流动特性及其摩阻系数

戚隆溪, 陈强, 王柏懿   

  1. 中国科学院 力学研究所非线性力学国家重点实验室, 北京 100080
  • 收稿日期:2001-03-05 修回日期:2001-06-06 出版日期:2002-06-20 发布日期:2002-06-20
  • 作者简介:戚隆溪(1939-),男(汉族),浙江浦江人,研究员,主要从事环境流体力学研究。
  • 基金资助:
    国家自然科学重点基金项目(19832060);面上基金项目(19972069)资助

Flow Characteristics and Its Friction Coefficient of Laminar Near-Wall Boundary Layer in Dusty Atmosphere

QI Long-xi, CHEN Qiang, WANG Bo-yi   

  1. Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China
  • Received:2001-03-05 Revised:2001-06-06 Online:2002-06-20 Published:2002-06-20

摘要: 采用双向耦合的双流体模型,研究了大气悬浮沙尘的存在对大气边界层中层流底层流动特性及摩阻系数的影响,计算并讨论了不同沙尘含量下含尘大气相对于无尘大气摩阻系数的变化。结果表明:摩阻系数的变化取决于悬浮沙尘的初始运动状态和质量载荷率

关键词: 气固两相流, 层流底层, 摩阻系数, 悬浮沙尘

Abstract: In the present paper, flow characteristics of laminar near-wall boundary layer in dusty atmosphere and the effects of airborne dust on friction coefficient are investigated. The two-way coupling model is employed for the gas-particle system where both the two phases are considered as a continuum medium. The velocity profiles of the two phases and their time developments are obtained. Based on the numerical simulation results, the dynamic behaviors of surface friction under different initial movement conditions and mass loading ratios of suspended sand are discussed in detail.

Key words: gas-particle two-phase flow, laminar sub-layer, friction coefficient, airborne dust

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