含尘大气近地层流底层流动特性及其摩阻系数  

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

作　　者：戚隆溪[1] 陈强[1] 王柏懿[1] 

机构地区：[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

出　　处：《中国沙漠》2002年第3期237-241,共5页Journal of Desert Research

基　　金：国家自然科学重点基金项目 (1983 2 0 60 );面上基金项目 (19972 0 69)资助

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.

关 键 词：近地层流 气固两相流 摩阻系数 悬浮沙尘 双流体模型 下垫面 

分 类 号：P404[天文地球—大气科学及气象学]