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中文摘要：
建立了描述风沙跃移运动发展过程以及风场一沙粒互馈机制的风沙跃移运动数值模型，模型中考虑了风场一沙粒之间酌耦合作用以及静电力的影响，同时风场是随时间变化的．模拟了风沙跃移运动从起始阶段至风沙流达到自平衡状态的整个发展过程所需的时间，起沙率与单宽输沙率随时间变化曲线，以及达到稳定后的单位面积输沙率沿高度分布以及贴地风速廓线的影响．计算结果表明，当沙粒平均带电量为60μC／kg时，计算所得的单宽输沙率以及输沙率沿高度分布与实验结果吻合得较好．
英文摘要：
A theoretical model is suggested to mathematically describe the evolution and the wind feedback mechanism of the wind-blown grain flow. In this theoretical model, the coupling interaction between the wind flow and saltant grains and the effect of electrostatical force are considered and the wind field is regarded as changing with time. The time for the entire system to reach a steady state, the variation curves of the saltant grain number and the grain transport rate with time, the mass-flux profiles and wind profiles at a steady state are calculated based on this theoretical model. These calculation results are well in agreement with the experimental data with the average charge-mass ratio of 60μC/kg.
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Statistical behaviors of different-size grains lifting off in stochastic collisions between mixed sa
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