The harmonious character in equilibrium aeolian transport on mixed sand bed

Xing, Mao

doi:10.1016/j.geomorph.2006.08.015

Cited by 29 publications

(36 citation statements)

References 20 publications

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“…(2). It is noted that the data from Ni et al (2002) and Rasmussen and Sørensen (2008) are all above the data from Dong et al (2002a) and Xing (2007), even though their wind velocities are in similar ranges. This is because that the lengths of sand bed used in former researchers' experiments are over 12 m but those in the latter researchers' experiments are only 4 m. The longer sand bed used led to a more fully developed saltation in which the mass flux profile is generally steeper than that for shorter sand bed, but the power law for the profile gradients of different sized grains is preserved for all these sand beds.…”

Section: Sand Mass Flux Profilesmentioning

confidence: 78%

“…The transport characteristics of the two types of sand beds with different grain size distributions and their binary mixture were tested. The measured data have been shown in a previous paper (Xing, 2007). Here, attempts were made to explore the effect of mixing on the motions of different sized grains by reanalyzing these data in a different way.…”

Section: Methodsmentioning

confidence: 96%

“…The measurements were carried with air velocities of 8.5, 10.5, 12.5 and 14.5 m/s. A detailed description of the wind tunnel and measurement method can be found in Xing (2007).…”

Section: Methodsmentioning

confidence: 99%

“…Attempts were made to model the saltation of different sized particles theoretically (Shao and Mikami, 2005) and numerically (Kok and Renno, 2009), but the ejection characteristics of different sized grains and the relationship between them are still unclear and are assumed empirically in these models. Xing (2007) conducted a wind-tunnel experiment using mixed sand beds, in which the vertical distribution of the mass flux profiles of different grain size groups was found to be similar and their slopes on log-linear plots were nearly equal. Furthermore, Xing (2007) proposed a semi-analytical relationship between the transport rates of different grain size groups with the original grain size distribution of the sand.…”

Section: Introductionmentioning

confidence: 99%

“…Xing (2007) conducted a wind-tunnel experiment using mixed sand beds, in which the vertical distribution of the mass flux profiles of different grain size groups was found to be similar and their slopes on log-linear plots were nearly equal. Furthermore, Xing (2007) proposed a semi-analytical relationship between the transport rates of different grain size groups with the original grain size distribution of the sand. In order to establish a quantitative relationship between the transport of different grain size groups, it is essential to examine their interaction mechanisms, especially the mechanisms of energy propagation in the splash process and the ejection of different sized grains.…”

Section: Introductionmentioning

confidence: 99%

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The saltations of different sized particles in aeolian sand transport

Xing

Adams

2011

Geomorphology

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Section: Sand Mass Flux Profilesmentioning

confidence: 78%

Section: Methodsmentioning

confidence: 96%

“…The measurements were carried with air velocities of 8.5, 10.5, 12.5 and 14.5 m/s. A detailed description of the wind tunnel and measurement method can be found in Xing (2007).…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The saltations of different sized particles in aeolian sand transport

Xing

Adams

2011

Geomorphology

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Electrification of saltating particles in wind‐blown sand: Experiment and theory

Zhang

Zheng

2013

JGR Atmospheres

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[1] The electrification of sand particles is a common phenomenon in wind-blown sand movement. The charge-to-mass ratio of particles is an important parameter to characterize the property of charged particles. However, understanding of the charge-to-mass ratio remains open, and significant discrepancies exist between previous contact electrification models and measurements. This work focuses on the charge-to-mass ratio of saltating particles in wind-blown sand. Experiments were carried out in a wind tunnel using sand particles with the mean diameter d ¼ 160 μm. The motions of the saltating particles in the air flow were analyzed by particle image velocimetry, and the charge-to-mass ratios were determined by measuring both the charge and mass of saltating sand particles collected in a Faraday cup. The measured results show that the charge-to-mass ratio increases exponentially with the height above the surface and the vertical profiles of the charge-to-mass ratios can be reproduced well by considering the multiple collisions process between saltating particles and sand bed. In addition, the results suggest that the charge-to-mass ratio is determined by the number of collisions, impacting velocity, and sand grain diameter combined.Citation: Zhang, H., X.-J. Zheng, and T. Bo (2013), Electrification of saltating particles in wind-blown sand: Experiment and theory,

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Aeolian particle flux profiles and transport unsteadiness

Bauer

Davidson‐Arnott

2014

JGR Earth Surface

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Vertical profiles of aeolian sediment flux are commonly modeled as an exponential decay of particle (mass) transport with height above the surface. Data from field and wind-tunnel studies provide empirical support for this parameterization, although a large degree of variation in the precise shape of the vertical flux profile has been reported. This paper explores the potential influence of wind unsteadiness and time-varying intensity of transport on the geometry (slope, curvature) of aeolian particle flux profiles. Field evidence from a complex foredune environment demonstrates that (i) the time series of wind and sediment particle flux are often extremely variable with periods of intense transport (referred to herein as sediment "flurries") separated by periods of weak or no transport; (ii) sediment flurries contribute the majority of transport in a minority of the time; (iii) the structure of a flurry includes a "ramp-up" phase lasting a few seconds, a "core" phase lasting a few seconds to many tens of seconds, and a "ramp-down" phase lasting a few seconds during which the system relaxes to a background, low-intensity transport state; and (iv) conditional averaging of flux profiles for flurry and nonflurry periods reveals differences between the geometry of the mean profiles and hence the transport states that produce them. These results caution against the indiscriminate reliance on regression statistics derived from time-averaged sediment flux profiles, especially those with significant flurry and nonflurry periods, when calibrating or assessing the validity of steady state models of aeolian saltation.

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The harmonious character in equilibrium aeolian transport on mixed sand bed

Cited by 29 publications

References 20 publications

The saltations of different sized particles in aeolian sand transport

The saltations of different sized particles in aeolian sand transport

Electrification of saltating particles in wind‐blown sand: Experiment and theory

Aeolian particle flux profiles and transport unsteadiness

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