Lagrangian Modelling of Saltating Sediment Transport: A Review

Bialik, Robert J.

doi:10.1007/978-3-319-17719-9_16

Cited by 5 publications

(4 citation statements)

References 67 publications

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“…In addition to experimental investigations, several (detailed) numerical models were developed that focused on accurate description of the shape of a single saltation trajectory through accounting for the impact of one or more individual processes such as: collision‐rebound between particles [ Schmeeckle et al ., ; Lee et al ., ; Bialik , ], particle collision‐rebound with the channel bottom [ Sekine and Kikkawa , ; Niño and Garcia , ], three‐dimensional nature of the particles' motion [ Lee et al ., ; Bialik et al ., ], hydrodynamic lift force acting on the particles [ Lee and Hsu , ; Zou et al ., ; Lukerchenko et al ., ], and drifting force due to turbulent diffusion [ Rowiński , ]. For additional details on these models, see the recent review work of Bialik [] on Lagrangian models of saltating sediment transport.…”

Section: Introductionmentioning

confidence: 99%

Validating a universal model of particle transport lengths with laboratory measurements of suspended grain motions

Naqshband

McElroy

Mahon

2017

Water Resources Research

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The mechanics of sediment transport are of fundamental importance for fluvio‐deltaic morphodynamics. The present study focuses on quantifying particle motions and trajectories across a wide range of flow conditions. In particular, a continuous model is presented that predicts particle travel distances for saltation and suspension based on Rouse number and relative grain roughness. By utilizing a series of eight video cameras in a plexiglass flume direct measurements of the distributions of particle travel distances (excursion lengths) were obtained. To this end, experiments were carried out in dark under black lights with fluorescent painted plastic and quartz sand particles. For relatively high Rouse numbers indicating bed load dominant transport regime ( bold-italicP≥2.5), particle motion is governed by the effect of gravitational forces (settling velocities) and measured excursion lengths closely follow a Gaussian distribution. For bold-italicP=2.5, particle motion is equally subjected to both gravitational and turbulent forces. Consequently, measured excursion lengths exhibit a bimodal distribution with two distinct peaks. As turbulent fluctuations increase and dominate particle motion over gravity ( bold-italicP<2.5), distributions of excursion lengths become unimodal and negative‐skewed with mean values deviating from the modes. The predicted trend of linearly increasing excursion lengths with decreasing Rouse numbers is consistent with measured excursion lengths across a wide range of Rouse numbers true(bold-italicP=1.8−8.9). Furthermore, measured excursion lengths are observed to fit within the predicted range of excursion lengths with no significant difference between measured excursion lengths of plastic and quartz sand particles.

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Section: Introductionmentioning

confidence: 99%

Validating a universal model of particle transport lengths with laboratory measurements of suspended grain motions

Naqshband

McElroy

Mahon

2017

Water Resources Research

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“…Hosseini‐Sadabadi et al () considered a particle at motion at a certain instant if the stream‐wise coordinate of its position exceeded all the previous ones and was lower than all the following ones, amending in this way the earlier criterion of Campagnol et al (). This brief review considered a few experimental studies, but the problem of defining an entrainment condition is also present in numerical investigations (e.g., Bialik, ; Wu & Chou, ; Wu & Jiang, ). The impact of using different criteria on the resulting statistics for hop properties will be explored in section .…”

Section: Identification Of a Particle Motion Statementioning

confidence: 99%

On Reasons of the Scatter of Literature Data for Bed‐Load Particle Hops

Hosseini‐Sadabadi

Radice

Ballio

2019

Water Resources Research

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This Report examines two key issues emerging when one deals with high-resolution data for particle tracks in bed-load transport. The first relates to how a particle motion/rest state is defined; using different definitions of motion changes the mean values computed for particle hop length and duration, that are key properties for phenomenological analysis of bed-load transport and quantitative estimation of the associated rates. The second issue refers to the experimental bias due to considering a finite observation area within the channel bed. A conceptual presentation of the problem is here complemented by an analysis of experimental data, from both the literature and new experiments with weak bed-load transport. Four definitions of motion were employed, together with two different ways (correcting or not the bias due to the observation area) of computing mean values from measured hop data. The results demonstrate that using different definitions and operational methods highly changes the mean values of hop-related quantities. This may explain the scatter among literature data and challenges future Lagrangian investigation of bed-load transport.

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“…Over recent decades, momentous advances in the mechanics of bed particle saltation have been primarily made through experimental observations [2,3,7,8,. In addition, several analytical and numerical studies have been carried out to model bed particle saltation [46][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62]. Before going into the details of the salient features of bed particle saltation, it is rather interesting to throw some light on the threshold of bed particle saltation.…”

Section: Introductionmentioning

confidence: 99%

Bed particle saltation in turbulent wall-shear flow: a review

Ali

Dey

2019

Proc. R. Soc. A.

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Bed particle saltation in turbulent wall-shear flow remains an intriguing phenomenon in applied hydro-dynamics. In this review, we report the current state of the art of bed particle saltation in turbulent wall-shear flow, highlighting the physical characteristics of bed particle saltation and its mathematical modelling. A critical appraisal of the mechanics of bed particle saltation is presented thorough ample experimental evidence. The salient features of bed particle saltation, encompassing the saltation height, saltation length, particle velocity, saltation duration, particle collision with the bed, particle rotation, particle resting time and particle re-entrainment, are thoroughly discussed. Both the deterministic and computational fluid dynamics approaches in modelling bed particle saltation are summarized, and the subtle role of the hydrodynamic forces is elaborated. The estimation of bedload flux in a fluvial environment, emanating from the mathematical modelling of bed particle saltation, is delineated using different modelling approaches. Finally, the challenges in modelling bed particle saltation are highlighted, and a new look at bed particle saltation is furnished.

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Lagrangian Modelling of Saltating Sediment Transport: A Review

Cited by 5 publications

References 67 publications

Validating a universal model of particle transport lengths with laboratory measurements of suspended grain motions

Validating a universal model of particle transport lengths with laboratory measurements of suspended grain motions

On Reasons of the Scatter of Literature Data for Bed‐Load Particle Hops

Bed particle saltation in turbulent wall-shear flow: a review

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