【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更多还原

【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.更多还原