Numerical investigation on VIV suppression of the cylinder with the bionic surface inspired by giant cactus

Wang, Wei; Song, Baowei; Mao, Zhaoyong; Tian, Wenlong; Zhang, Tingying

doi:10.1016/j.oceaneng.2020.107775

Cited by 33 publications

(5 citation statements)

References 31 publications

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“…There are some other measures, which also sufficiently mitigate the VIV, need to change the entire length of the cylinder, such as Bach-type blades (Zhu et al 2019), groove strips (Wang et al 2019) and control rods (Lu et al 2019). Similar to helical strakes (Xu et al 2018, Chen et al 2019, Takeshi and Tian 2020, surface control bumps (Owen and Bearman 2001), bionic surface inspired by giant arctus (Marcollo et al 2018, Wang et al 2020, plasma actuators (Hebrero et al 2020) and wavy cylinders (Lam andLin 2009, Zou and are also effective on drag reduction and VIV mitigation. In Owen's study, the drag reductions up to 47% were recorded for a circular cross-sectional body with a wavy axis.…”

Section: Introductionmentioning

confidence: 99%

A novel drag reduction and vortex shedding mitigation measure for a circular cylinder in the subcritical regime

Zhang

et al. 2020

Fluid Dyn. Res.

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A novel aerodynamic measure, an arch mounted leeward of a circular cylinder, is proposed to reduce drag and mitigate vortex shedding for a circular cylinder. To confirm the validity of the proposed measure, the aerodynamic forces were measured through a force meter at the end of a cylinder, the wind pressure was measured at seven cross-sections of the cylinder, and elastically mounted cylinders were also tested. The results show that the arch significantly reduces drag and fluctuating lift by mitigating the vortex shedding in the subcritical Reynolds number range when the proper central angle is selected for the arch. The arch creates a higher base pressure at the leeward side and induces a pressure exchange and spanwise axial flow. This influence is extended along the length of the cylinder by the axial flow due to the strong correlation in the wake in the subcritical regime. Therefore, the arch lowers the base pressure and disrupts the formation of vortex shedding.

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Section: Introductionmentioning

confidence: 99%

A novel drag reduction and vortex shedding mitigation measure for a circular cylinder in the subcritical regime

Zhang

et al. 2020

Fluid Dyn. Res.

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“…And Reynolds-Averaged-Navier-Stokes (RANS) equations need to be solved. In the author's previous researches 27,28 and other research 29 , various turbulence models have been compared. The large amount of time is required to solve the three-dimensional two-degree-offreedom (2-DOF) VIV response, and the numerical calculation is conducted using the server of the Computing Center of Northwestern Polytechnical University.…”

Section: Governing Equationsmentioning

confidence: 99%

“…2 The Arbitrary Lagrangian-Eulerian (ALE) method is adopted to solve the moving boundary. 27,28 The boundary of the Terebridae-inspired cylinder is a no-slip wall. The length of the computational domain along the flow direction is 60D.…”

Section: Computational Domain and Oscillation Equationsmentioning

confidence: 99%

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Vortex Induced Vibration Response of the Cylinder Inspired by Terebridae with Different Helical Angle

Yu,

Mao,

Tian

et al. 2024

Preprint

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Biomimetic design has recently received widespread attention. Inspired by the Terebridae structure, this paper provides a structural form for suppressing vortex-induced vibration (VIV) response. Four different structural forms are shown, including the traditional smooth cylinder (P0), the Terebridae-inspired cylinder with a helical angle of 30° (P30), the Terebridae-inspired cylinder with a helical angle of 60° (P60), and the Terebridae-inspired cylinder with a helical angle of 90° (P90). And computational fluid dynamics (CFD) method is adopted to solve the flow pass the Terebridae-inspired structures, and the vibration equation is solved using the Newmark-β method. The results show that the VIV responses are effectively controlled in the lock-in region for P30, P60, and P90, and P60 shows the best VIV suppression performance. The transverse amplitude and the downstream amplitude can be reduced by 82.67% and 91.43% respectively for P60 compared with that for P0, and the peak of the mean-drag coefficient is suppressed by 53.33%. The Q-criterion vortices of P30, P60, and P90 are destroyed, with irregular vortices shedding. It is also found that the boundary layer separation is located on the Terebridae-inspired ribs. The twisted ribs cause the separation point to constantly change along the spanwise direction, resulting in the development of the boundary layer separation being completely destroyed. The strength of the wake flow is significantly weakened for the Terebridae-inspired cylinder. In the lock-in region, the motion trajectory presents a typical 8-shaped for P0, while the motion trajectory of the Terebridae-inspired cylinder tends to be a flat 1-shaped.

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“…In terms of numerical simulations, Qiu et al and Wei Wang et al modified two cylinders and enhanced the VIV by changing the surface parameters of the cylinders to study the intensity of the vortexes and the shedding form of the vortexes [35,36]. Chen et al studied the FIV response of three cylinders in series mode at low Reynolds numbers.…”

Section: Introductionmentioning

confidence: 99%

Study of Hydrokinetic Energy Harvesting of Two Tandem Three Rigidly Connected Cylinder Oscillators Driven by Fluid-Induced Vibration

Chao,

Luo,

Yang

et al. 2024

JMSE

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This study utilizes a bidirectional fluid–structure interaction numerical method to investigate the hydrodynamic and energy harvesting characteristics of two tandem three rigidly connected cylinder oscillators with different inter-oscillator spacing ratios. The analysis considers inter-oscillator spacing ratios of 8, 12, and 16 within a reduced velocity range of U* = 2–13 (equivalent to flow velocities of 0.18–1.16 m/s). The research explores the hydrodynamic interference features, energy harvesting variations, and the efficiency and density of energy harvesting of both upstream and downstream three-cylinder oscillators. The findings indicate that with increasing reduced velocity and inter-oscillator spacing ratio, the mutual interference between upstream and downstream oscillators diminishes. Wake patterns observed in the two series-connected three-cylinder oscillators include 2P, 2S, and 2T patterns, with fragmented vortices and banded vortices at specific reduced velocities. The most significant disparity in energy harvesting efficiency between upstream and downstream oscillators is observed at U* = 9.

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Numerical investigation on VIV suppression of the cylinder with the bionic surface inspired by giant cactus

Cited by 33 publications

References 31 publications

A novel drag reduction and vortex shedding mitigation measure for a circular cylinder in the subcritical regime

A novel drag reduction and vortex shedding mitigation measure for a circular cylinder in the subcritical regime

Vortex Induced Vibration Response of the Cylinder Inspired by Terebridae with Different Helical Angle

Study of Hydrokinetic Energy Harvesting of Two Tandem Three Rigidly Connected Cylinder Oscillators Driven by Fluid-Induced Vibration

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