An experimental study on the motion of solid spheres under solitary wave attack

Göral, Koray Deniz; Güler, Hasan Gökhan; Baykal, Cüneyt; Yalçıner, Ahmet Cevdet

doi:10.1016/j.oceaneng.2021.109946

Cited by 5 publications

(2 citation statements)

References 12 publications

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“…The motion of the settling particles was recorded using a digital camera. The recordings were analyzed to obtain settling position versus time using an image processing algorithm, based on color tracking, similar to Goral et al (2021). From these the terminal settling velocities (mean and standard deviation) have been obtained, based on results from several repeated tests for particles comprising each group.…”

Section: Dimensional Analysis and Experimental Set Upmentioning

confidence: 99%

Laboratory Study of Non-Buoyant Microplastic Transport Beneath Breaking Irregular Waves on a Live Sediment Bed

Fuhrman

Güler

Larsen

et al. 2023

Coastal Sediments 2023

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Wave flume experiments investigating the cross-shore transport and accumulation patterns of non-buoyant microplastic particles under irregular waves propagating, shoaling and breaking on a live sediment bed are considered. Eighteen microplastic particle groups having variable shape, density and size are tested. The experiments considered a pre-developed singly-barred profile, reasonably representative of field conditions. Four different microplastic accumulation hotspots are identified: (1) the offshore toe of the breaker bar, (2) at the breaker bar, (3) the plateau region between the breaker bar and beach, and (4) the beach. The accumulation patterns primarily fall within three different particle Dean number regimes (ratio of the characteristic wave height to the product of the settling velocity and characteristic wave period). For the parameter space tested, the dominant transport direction generally depends on the importance of offshore-driving gravitational effects and onshore-driving effects associated with nonlinear wave shapes. Particle position relative to the jet of plunging breaking waves likewise plays a key role in determining the net transport direction, especially near the breaker bar.

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Section: Dimensional Analysis and Experimental Set Upmentioning

confidence: 99%

Laboratory Study of Non-Buoyant Microplastic Transport Beneath Breaking Irregular Waves on a Live Sediment Bed

Fuhrman

Güler

Larsen

et al. 2023

Coastal Sediments 2023

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“…Ghafari et al, [17] presented an experimental and numerical investigation of solitary wave interactions with two submerged rectangular obstacles. Goral et al [18] experimentally studied the dynamic responds of solid spheres in solitary waves. Wu et al [19] performed a study on the problem of the run-up of breaking solitary waves on uniform slopes.…”

Section: Introductionmentioning

confidence: 99%

Numerical Generation of Solitary Wave and Its Propagation Characteristics in a Step-Type Flume

Song

Yao

Liu

et al. 2022

JMSE

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This work concerns the numerical generation of stable solitary waves by using a piston-type wave maker and the propagation characteristics of a solitary wave in a step-type flume. The numerical generation of solitary waves was performed by solving N-S (Navier–Stokes) equations on the open source CFD (computational fluid dynamics) platform OpenFOAM. To this end, a new module of dynamic boundary conditions was programmed and can be applied to prescribe the horizontal linear motion of a paddle. Two kinds of paddle motions, based on both the first-order and ninth-order solutions of solitary waves, were first determined. The time history of paddle motion was restored in a file, which was then used as an input for the virtual wave maker. The solitary wave in water with a constant depth was generated by both numerical simulation and experiment in the wave flume installed with a piston wave maker. The results show that the amplitudes of trailing waves based on the first-order solution are larger than those based on the ninth-order solution and that wave height based on the first-order solution decays more quickly. The numerical wave profiles are in good agreement with the experimental ones. The propagation characteristics of a solitary wave in a step-type flume was numerically investigated as well. It was found that a part of the solitary wave is reflected when the solitary wave passes the step due to blockage effects, and the forward main wave collapses quickly when it enters shallow water. This work presents a very successful numerical study of stable solitary wave generation and reveals the phenomena when a solitary wave propagates in a step-type flume.

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