Numerical analysis of the influence of the near ground turbulence on the wind-sand flow under the natural wind

Ma, Gaosheng; Wang, Yan; Zheng, Jian

doi:10.1007/s10035-021-01097-3

Cited by 6 publications

(2 citation statements)

References 40 publications

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“…This in turn reduces the speeds of the horizontal dust flux particles, such that a steady state is reached when the speeds of the impacting particles are reduced to a value at which there is a single particle leaving the soil surface for each particle impacting it [ 52 ]. Because of the finite response time of dust flux particle speeds to the wind speed, the horizontal dust flux can “overshoot” the eventual steady-state mass flux [ 53 , 54 , 55 ].…”

Section: Discussionmentioning

confidence: 99%

“…Moreover, recent measurements indicated that the restitution coefficient is a declining function of the saltator impact speed [68]. Numerical simulations [50,53,69,70], laboratory experiments [71], and theory [57] have all indicated that the number of splashed particles scales with the impacting momentum. Experiments have also indicated that the fraction of the average impacting momentum spent on splashing surface particles is of the order of 15% for a bed of loose sand particles [56,57,59].…”

Section: Discussionmentioning

confidence: 99%

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Application of a High-Precision Aeolian Sand Collector in Field Wind and Sand Surveys

Liu

Kang

Chen³

et al. 2021

IJERPH

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Sand collectors are important for quantitatively monitoring aeolian sand activities. In this paper, an automatic high-precision sand collector was designed. Based on the measured data of aeolian transport performed with a piezoelectric saltation sensor (H11-Sensit) and a 10 m high meteorological tower, the sampling efficiency of the automatic sand sampler and the horizontal dust flux of the near surface were analyzed based on observed data. The results were as follows: the best-fitting function between the number of impacting sand particles and the amount of collected sand was a linear relationship. The average value of R2 was 0.7702, and the average sand collection efficiency of the sand collector at a height of 5 cm was 94.3%, indicating good sand collection performance. From all field tests conducted so far, it appeared that a high-precision sand sampler was a useful device for making field measurements of horizontal dust fluxes and ascertaining the relationship between transition particles and wind speed. In the future, the equipment costs and wind drive will continue to be optimized.

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