Steady state saltation in air

摘要: Coupled equations of motion for steady state saltation over an infinite plane are derived and solved a simplified model the grain-surface impact process. Experimentally observed features wind velocity profile in qualitatively reproduced, including diminution sub-saltation layer mean speed, as friction speed increases. In this surface saltating grains remains relatively constant wide range free-stream shear stresses, grain mass flux increases with uf* less rapidly than uf3.