Flow characteristics around a circular cylinder subjected to vortex-induced vibration near a plane boundary

Hsieh, Sheng‐Jen; Low, Ying Min; Chiew, Yee‐Meng

doi:10.1016/j.jfluidstructs.2016.06.007

Cited by 59 publications

(13 citation statements)

References 25 publications

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“…The settling velocity of the aluminium particles was estimated to be 92.6 µm/s using Stoke's law, which is negligible compared with the propeller jet velocity. The same particle has been extensively used in previous studies (e.g., Lin et al [12], Hsieh et al [13] and Wei et al [14]) and validated as a satisfactory seeding particle in PIV applications.…”

Section: Experimental Setup and Methodologymentioning

confidence: 99%

“…The settling velocity of the aluminium particles was estimated to be 92.6 μm/s using Stoke's law, which is negligible compared with the propeller jet velocity. The same particle has been extensively used in previous studies (e.g., Lin et al [12], Hsieh et al [13] and Wei et al [14]) and validated as a satisfactory seeding particle in PIV applications. For a three-dimensional scour hole induced by a propeller jet, one may find it difficult to capture the flow field within the scour hole, since the lateral sediment deposition could block the optical access in a normal PIV operation where the camera is 90 • to the laser sheet.…”

Section: Experimental Setup and Methodologymentioning

confidence: 99%

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Vortex Evolution within Propeller Induced Scour Hole around a Vertical Quay Wall

Wei

Cheng

Chiew

et al. 2019

Water

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This paper presents an experimental study on the characteristics of the propeller-induced flow field and its associated scour hole around a closed type quay (with a vertical quay wall). An “oblique particle image velocimetry” (OPIV) technique, which allows a concurrent measurement of the velocity field and scour profile, was employed in measuring the streamwise flow field (jet central plane) and the longitudinal centerline scour profile. The asymptotic scour profiles obtained in this study were compared with that induced by an unconfined propeller jet in the absence of any berthing structure, which demonstrates the critical role of the presence of the quay wall as an obstacle in shaping the scour profile under the condition of different wall clearances (i.e., longitudinal distance between propeller and wall). Moreover, by comparing the vortical structure within the asymptotic scour hole around the vertical quay wall with its counterpart in the case of an open quay (with a slope quay wall), the paper examines the effect of quay types on the formation of the vortex system and how it determines the geometrical characteristic of the final scour profile. Furthermore, the temporal development of the mean vorticity field and the vortex system are discussed in terms of their implications on the evolution of the scour hole. In particular, comparison of the circulation development of the observed vortices allows a better understanding of the vortex scouring mechanism. Energy spectra analysis reveals that at the vortex centers, their energy spectra distributions consistently follow the −5/3 law throughout the entire scouring process. As the scour process evolves, the turbulent energy associated with the near-bed vortex, which is responsible for scouring, is gradually reduced, especially for the small-scale eddies, indicating a contribution of the dissipated turbulent energy in excavating the scour hole. Finally, a comparison of the near-bed flow characteristics of the average kinetic energy (AKE), turbulent kinetic energy (TKE), and Reynolds shear stress (RSS) are also discussed in terms of their implications for the scour hole development.

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Section: Experimental Setup and Methodologymentioning

confidence: 99%

Section: Experimental Setup and Methodologymentioning

confidence: 99%

Vortex Evolution within Propeller Induced Scour Hole around a Vertical Quay Wall

Wei

Cheng

Chiew

et al. 2019

Water

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“…Most scholars tend to use numerical simulation to conduct research, and the related physical experiments are few. By using particle image velocimetry (PIV) and fiber laser Doppler velocimetry (FLDV), Poggi et al (2002), Lin et al (2009) and Hsieh et al (2016) experimentally studied the flow characteristics around the circumference and obtained a relatively accurate flow distribution. Kravchenko & Moin (2000) conducted a numerical study on a pipeline with a Reynolds number of 3,900, the results show that different calculation methods have great influence on the flow field distribution near the pipeline.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of the flow-field characteristics around the suspended pipeline under oblique flows

Yang

Qian

Zhang³

2022

Water Supply

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The flow field distribution around the suspended pipeline is closely related to the mechanical characteristics and local scour characteristics of the underwater crossing pipelines. To fully investigate the velocity distribution and wake structure characteristics around the suspended pipeline under oblique flows, a flume model test and a numerical simulation based on the LES (Large Eddy Simulation) method were performed. The results showed that the velocity distribution near the suspended pipeline under oblique flows had obvious three-dimensional characteristics. The influence range of pipeline on velocity is 1 d before to 6 d behind the pipeline (d is pipeline diameter). The smaller the flow angle, the more disordered the velocity distribution is. The larger the flow angle, the greater the variation degree of the velocity at each section at the same section is, as well as the higher the velocity deficit value is. In addition, the larger the angle of pipe flow, the more violent the wake structure changes with the flow velocity, and the stronger the regularity of vortex street shedding. This research provides a theoretical reference for the scour prevention design and safe operation of crossing pipelines.

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“…Among the bluff bodies, the flow around the cylinders has historically found considerable attention for numerous researchers due to its fundamental flow nature. A general review of the published works shows that the flow around a single cylinder in the free-stream and near a wall [1][2][3][4][5][6][7][8][9][10][11][12] has been studied in terms of the vortex shedding phenomenon, active and passive flow control, and wake structure in laminar, transitional, and turbulent regimes. Beyond the single cylinder, the flow around the dual cylinders in various arrangements such as the side-byside and tandem [13][14][15][16][17][18][19][20][21] has been attractive among the researchers not only using different numerical studies but also with various experiments to reveal the interaction level between the cylinders at different gap spaces.…”

Section: Introductionmentioning

confidence: 99%

Analysis of heat and fluid flow around two co-rotating side-by-side cylinders

Hassanzadeh

Darvishyadegari

2019

Sādhanā

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Analysis of the heat and fluid flow around two co-rotating side-by-side cylinders is the subject of this numerical study which is done at constant Reynolds and Prandtl numbers of 200 and 7.0, respectively. Both cylinders rotate in the counterclockwise direction with an identical rotating speed (RS) in the range from 0 to 4. On the other hand, several gap spaces between the rotating cylinders such as G/D = 1.5, 2.0, and 3.0 are considered in the present study. The obtained results are validated against the available data in the open literature. Many different results have been reported in this investigation. It is observed that co-rotating the cylinders deforms the wake region downstream of both cylinders which the vortex strength of the lower cylinder against the rotation is stronger than that of the upper cylinder. On the other hand, co-rotating the cylinders develops a negative lift force on both cylinders. Finally, it was concluded that rotating the side-by-side cylinders reduces the heat transfer rate between the fluid flow and cylinders in general. At whole RS and G/D values, the heat transfer rate of the upper cylinder is realized to be less than that of the lower cylinder. adhana(0123456789().,-volV)FT3 ](0123456789().,-volV)

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Flow characteristics around a circular cylinder subjected to vortex-induced vibration near a plane boundary

Cited by 59 publications

References 25 publications

Vortex Evolution within Propeller Induced Scour Hole around a Vertical Quay Wall

Vortex Evolution within Propeller Induced Scour Hole around a Vertical Quay Wall

Numerical investigation of the flow-field characteristics around the suspended pipeline under oblique flows

Analysis of heat and fluid flow around two co-rotating side-by-side cylinders

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