Net sheet-flow sediment transport rate: Additivity of wave propagation and nonlinear waveshape effects

Tan, Weikai; Yuan, Jinliang

doi:10.1016/j.csr.2022.104724

Cited by 4 publications

(3 citation statements)

References 26 publications

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“…The theoretical basis on the multilayer model of transport of granulometrically heterogeneous sediments under both wave and flow conditions is summarized by Kaczmarek et al [32,38,39]. The presented theoretical model verified by present experiments is, on the one hand, a continuation of the latest achievements in the area of research on the wave transport [7,8,[24][25][26][27][28][29][30]], but at the same time proposes a "new way" of research, focusing not on the resultant transport in time, but on the separately considered transport in the crest and trough of the wave.…”

Section: Introductionsupporting

confidence: 59%

“…On the basis of their measurements, they argued that the effects induced by the bed slope on resultant sediment transport during the wave period may be as important as effects due to the slope or asymmetry of the wave. The same team [26] presented a two-layer model of sediment transport in wave motion, taking into account the effect of phase lags.…”

Section: Introductionmentioning

confidence: 99%

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An Experimental Study on Progressive and Reverse Fluxes of Sediments with Fine Fractions in the Wave Motion over Sloped Bed

Radosz

Zawisza

Biegowski

et al. 2022

Water

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The purpose of the study was to collect experimental data on the vertical structure of sediment fluxes during the wave crest and trough phase over sloped bed. The first stage of the experimental work included measurements of these fluxes using the particle image method, while the second stage, measurements of sediment transport rates and granulometric distributions of sediments collected in the traps on both sides of the sloped initial area. The experimental data were compared both with the results collected previously over flat bed as well as with a theoretical analysis based on a three-layer model of graded sediment transport. This model does not take into account the effects related to the presence of fine and very fine fractions and neglects the effects related to the bed slope, i.e., to gravitational forces and to additional pressure gradients. Hence, a modification of this model is proposed that is based on four coefficients that corrected for sediment fluxes over sloped bed. The consistency of the sediment transport calculations according to the modified model with measurements was achieved within plus/minus a factor of 2 of the measurements.

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Section: Introductionsupporting

confidence: 59%

Section: Introductionmentioning

confidence: 99%

An Experimental Study on Progressive and Reverse Fluxes of Sediments with Fine Fractions in the Wave Motion over Sloped Bed

Radosz

Zawisza

Biegowski

et al. 2022

Water

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show abstract

“…Tan W. and Yuan J. [18,19,20] described the experiments under sinusoidal oscillatory flows over a sloping bed. They argued that the effects induced by the bed slope on sediment transport may be as important as the effects due to the wave's asymmetry.…”

Section: Review Of Literaturementioning

confidence: 99%

Modelling of Granular Sediment Transport in Steady Flow Over a Mobile Sloped Bed

Biegowski,

Pietrzak,

Radosz

et al. 2024

Preprint

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This paper introduces a three-layer system, proposing a comprehensive model of granular mixture transport over a mobile sloped bed in a steady flow. This system, consisting of the bottom, contact and upper zones, provides complete, continuous sediment velocity and concentration vertical profiles. The model considers gravity’s effect on sediment transport in the bottom (dense) layer, a crucial factor often overlooked in previous studies. The induced movement in the mobile sublayer of the dense layer causes an increase in velocity at the upper boundary of this layer, significantly affecting the vertical distributions of velocity and concentration above this layer. We described the interactions between fractions and an intensive sediment mixing and sorting process in the contact layer. The proposed shear variation, with an increase in its maximum value at the bed, adds to the novelty of our approach. The data sets used for the model’s validation cover various conditions, including slopes, grain diameters, densities and grain mobility conditions, from incipient motion to a fully mobilised bed. This extensive validation process instils confidence in the theoretical description and its applicability to real-world scenarios.

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Numerical tank for suspended sediment transport under strong nonlinear waves in shallow water zones

Jiang,

Zhang,

Chen

et al. 2024

Physics of Fluids

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Wave nonlinearity and free surface effects are recognized as important factors for sediment transport under nonlinear waves. Existing studies primarily focus on oscillatory water tunnel (OWT) instead of real waves for sediment transport due to the challenges in constructing real-scale wave tank. In contrast to OWT, the wave tank performs both wave nonlinearity and free surface effect on sediment transport. A numerical wave-sediment tank is developed for strong nonlinear wave propagation over sediment bed with low computational cost. The nonlinear wave is generated by defining the inlet boundary condition and absorbed by using a damping function, and the classical volume of fluid method is used to handle the free surface. The numerical tank further considers particle wake vortex effect and modifications in relative velocity of high sediment concentration, and incorporates phase lag, mass conservation, acceleration effect, and asymmetric wave boundary layer into near-bed sediment conditions. Therefore, the numerical tank avoids complex calculations for near-bed hyper-concentrated sediment in comparison with a two-phase model, i.e., the calculation of particle collision, friction, and detection of mobile bed surface. The numerical tank reasonably agrees with large-scale wave flume experiments and a two-phase model including free surface wave, and successfully performs sediment transport induced by strong nonlinear (second-order Cnoidal) wave. Compared to the OWT, the extra onshore streaming caused by free surface wave significantly enhances onshore sediment transport.

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Net sheet-flow sediment transport rate: Additivity of wave propagation and nonlinear waveshape effects

Cited by 4 publications

References 26 publications

An Experimental Study on Progressive and Reverse Fluxes of Sediments with Fine Fractions in the Wave Motion over Sloped Bed

An Experimental Study on Progressive and Reverse Fluxes of Sediments with Fine Fractions in the Wave Motion over Sloped Bed

Modelling of Granular Sediment Transport in Steady Flow Over a Mobile Sloped Bed

Numerical tank for suspended sediment transport under strong nonlinear waves in shallow water zones

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