Abstract
Under the direct action of aerodynamic forces, a portion of sand particles on the bed tend to roll and slide forward, which is called creeping, while some particles tend to lift off the sand bed with certain velocities, and then act as saltation or suspension. The creeping particles are likely to excite their neighboring particles to jerk up into the air, and the saltating ones, after falling back to the ground, are likely to rebound and eject several of their neighboring particles out of the bed. Such lift-off and splash processes taking place near the sand bed are a significant ingredient of wind-blown sand movement, they directly influence the trajectories of sand particles and the development of wind-blown sand flow, and they always serve as the initial conditions for theoretical prediction models of sand motion.
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© 2009 Springer-Verlag Berlin Heidelberg
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Zheng, X. (2009). Sand Motion near the Sand Bed Surface. In: Mechanics of Wind-blown Sand Movements. Environmental Science and Engineering(). Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-88254-1_3
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DOI: https://doi.org/10.1007/978-3-540-88254-1_3
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Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-88253-4
Online ISBN: 978-3-540-88254-1
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