Particle velocity distribution based on the three-dimensional stochastic particle-bed collisions in wind-blown sand flux

Jin, T.; Wang, P.; Cheng, Nian‐Sheng; Zheng, Xiaogang

doi:10.1615/thmt-18.1260

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Grain‐scale Distributions In Wind‐blown Sand1

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2021

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“…A very important reason for greater angle is that many experiments ignore the spanwise velocity of particles, resulting in a large lift‐off angle (McEwan et al., 1992). Spanwise velocity cannot be ignored in sediment transport activities (Ammi et al., 2009; Jin et al., 2018; O'Brien & Neuman, 2016; Xing & He, 2013).…”

Section: Grain‐scale Distributions In Wind‐blown Sandmentioning

confidence: 99%

Characterization of Wind‐Blown Sand With Near‐Wall Motions and Turbulence: From Grain‐Scale Distributions to Sediment Transport

2021

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Reliable prediction of wind-blown sand movement in the natural environment is of major importance for studies of aeolian landforms and wind erosion control. Sand movement can be roughly divided into four main physical processes: (a) the initiation of surface particles by aerodynamic entrainment, (b) the subsequent trajectories of particles, (c) the splashing and rebounding of particles by impacting processes, and (d) modification of the wind profile by saltating particles (Anderson & Haff, 1991;Bagnold, 1941;Kok & Renno, 2009). Thus, characterization of particle movement in wind-blown sand requires an understanding of several key physical variables, including the impact and lift-off parameters of particles and transport flux

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