A study on the initiation of saltation in the model of wind-blown sand transport considering the effect of turbulence

Liu, Li; Bo, Tang

doi:10.1007/s10035-019-0934-2

Cited by 6 publications

(3 citation statements)

References 54 publications

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“…This is in agreement with Zobeck et al (2003), who determined that creep transport accounted for 40% of total wind erosion. However, other studies have found saltation to be the dominant transport form of wind erosion, with the potential to provide power for creep and suspension (Martin and Kok, 2017;Liu and Bo, 2019). Under natural environments, a gradual transition is observed between the three erodible particles' movement patterns, and each transition mode is related to the surface shear stress and size of the erodible particles (Zhang et al, 2021).…”

Section: Discussionmentioning

confidence: 97%

Effect of tillage management on the wind erosion of arable soil in the Chinese Mollisol region

Chen

Zhang

et al. 2022

Front. Environ. Sci.

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Wind erosion is a serious problem in agricultural regions and threatens the regional food production in Northeast China. However, limited information is available on the characteristics of wind erosion in arable soil in Northeast China. As a result, field-based research during periods of vulnerability to wind erosion is essential. This study quantified the characteristics of soil wind erosion under no-tillage (NT) and conventional tillage (CT) treatments in China’s northern “corn-belt.” The results determined the wind erosion transport mode of Mollisols to be generally characterized by creep and supplemented by saltation and suspension in Northeast China. The erodible particles of the creep accounted for 80.37% and 85.42% of the total wind erosion under the NT and CT treatments, respectively. During experiments with erodible particles in the saltation mode from the soil surface to 2 m, the majority of the particles were collected by the sampler at 0.5 m height, with the NT and CT treatments collecting 5.82 kg·m−2 and 6.93 kg·m−2 of erodible particles per unit area, respectively. Wind erosion on agricultural land was observed to be influenced by tillage practices, rainfall, wind speed, and soil moisture content. Average and maximum wind speeds exhibited significant positive correlations with wind erosion during April and May. Moreover, the erodible particles of each wind erosion transport mode (creep, saltation, and suspension) under CT were higher (1.73, 1.41, and 1.35 times) than those under the NT treatment. With less damage and greater protection of the surface soil, the NT treatment was able to decrease the occurrence of wind erosion and influence its outcome on farmland. Therefore, NT treatment should be encouraged as a key initiative for the reduction of wind erosion of arable soil in the Chinese Mollisol region.

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Section: Discussionmentioning

confidence: 97%

Effect of tillage management on the wind erosion of arable soil in the Chinese Mollisol region

Chen

Zhang

et al. 2022

Front. Environ. Sci.

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“…The image of the deposit enables the correct design of the geometry of the conveying device while meeting two important process criteria, namely the highest possible mass capacity of the conveyor and the lowest possible number of fruits that may be damaged. In addition, simulations of the distribution of forces affecting the transported fruit make it possible to reduce the probability of collision and to improve the design of the device (e.g., the analysis of the grits and angles increasing the uniformity of the transported deposit) [40,41]. Through changes in the input parameters (e.g., the time of moving the product on the gutter), the constructor of the device strives to optimize the construction of the device, while maintaining favorable quality parameters of the transported product [42][43][44].…”

Section: Discussionmentioning

confidence: 99%

Modeling of Transport of Loose Products with the Use of the Non-Grid Method of Discrete Elements (DEM)

Kryszak

Bartoszewicz²,

Szufa

et al. 2020

Processes

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The application of the Discrete Element Method (DEM) allows simulating the movement of a particle of any shape in a conveyor. The DEM method uses the assumptions of the Lagrange calculation model, in which each particle in the domain is tracked individually. It makes it possible to conduct a thorough examination of the behavior of the entire bulk material bed consisting of a set of elements with characteristic physicochemical properties. Therefore, the deposit is not considered according to averages and constants, e.g., strength values, but as a set of elements that can be described individually. The article presents the results of a simulation, with the use of the Discrete Elements Method (DEM), of the process of soft fruit transport in the food industry. The results of the research and exemplary simulations of blueberry fruit transport are presented. The influence of the type of a transport device on the values of normal and tangential forces occurring between the blueberry fruit and structural elements of the transport device, as well as the interaction between the fruits, were modeled. In addition, based on the amount of energy absorbed by each fruit due to collisions, the analysis of the energy spectrum of collisions of particles was carried out to determine the likelihood of damage to the fruit in transport and to identify the phenomena that favor it.

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“…Existing research indicates that the dualparameter exponential function can most accurately represent the structure of wind-borne sand flow near surface of quicksand area (KANG et al, 2017). The presence of a barrier can alter wind energy, particle size distribution, creeping, saltation, and suspended sand transport content, consequently modifying the wind-blown sand flow structure through the barrier (ZHANG et al, 2002;ZHOU et al, 2014;Liu and Bo, 2019). Therefore, to more precisely characterize the sand transport patterns and wind-borne sand flow structures within vertical straw sand-obstacles, further exploration of the sand flux model is warranted.…”

Section: Introductionmentioning

confidence: 99%

Interference effect of configuration parameters of vertical sand-obstacles on near-surface sand transport

Luo,

Li,

Tang

et al. 2023

Front. Environ. Sci.

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This study investigates the impacts of height (H) and porosity (P) on the structural properties of wind-driven sand flux in vertical sunflower straw sand-obstacles. We conducted an experiment on sand transport within barriers of various configurations within a 1 m proximity to the surface. In tandem, we monitored wind velocity and direction within the barriers, analyzed total sand transport rate, sand-blocking effects, and cumulative sediment transport rate heights for various parameter configurations, and devised a best sand transport flux model for use within the sand-obstacle. The efficacy of vertical sunflower stalk sand-obstacles in mitigating sand movement has been demonstrated to fall within the range of 37.26%–92.31%. This study reveals a significant correlation between barrier height and porosity in achieving this effect (p < 0.05). High and densely configured sand-obstacles lead to an accumulation of intercepted sand material in front of the front row of the sand-obstacle. In contrast, low and sparsely arranged sand-obstacles exhibit a delayed state of sand material accumulation. Furthermore, with an increase in the height of the obstacle and a decrease in porosity, there is a diminishing trend in the sand transport rate within the obstacle. Concurrently, the height of sand transport within the barrier exhibits an upward trend. A three-parameter exponential function has been employed to more precisely simulate the wind-sand flow structure characteristics within a 1-m height range of the barrier. These research findings contribute to an enhanced understanding of the impact of different vertical sand-obstacle configurations on near-surface wind-driven sand transport patterns in active desert areas. Moreover, they furnish both theoretical underpinnings and practical guidance for the scientific configuration of vertical sand-obstacles.

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A study on the initiation of saltation in the model of wind-blown sand transport considering the effect of turbulence

Cited by 6 publications

References 54 publications

Effect of tillage management on the wind erosion of arable soil in the Chinese Mollisol region

Effect of tillage management on the wind erosion of arable soil in the Chinese Mollisol region

Modeling of Transport of Loose Products with the Use of the Non-Grid Method of Discrete Elements (DEM)

Interference effect of configuration parameters of vertical sand-obstacles on near-surface sand transport

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