Vortex-induced vibration on a two-dimensional circular cylinder with low Reynolds number and low mass-damping parameter

Wanderley, Juan B. V.; Soares, Luiz F. N.

doi:10.1016/j.oceaneng.2015.01.012

Cited by 40 publications

(10 citation statements)

References 20 publications

(31 reference statements)

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“…In exploring the vibrational dynamics of a solid cylinder, the dimensionless vibration amplitude (Y/D) and the normalized vibration frequency (fy/fn) are matched to the work of Wanderley & Soares [28], as visually represented in Fig. 2.…”

Section: Model Validationmentioning

confidence: 99%

Passive Vibration Reduction in Circular Cylinders: The Role of Slits

Ali,

Islam,

Janajreh

2024

Proceedings of the 9th World Congress on Momentum, Heat and Mass Transfer

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This work investigates a passive flow control method to mitigate vortex-induced vibration (VIV) by introducing a slit into a circular structure. The impact of varying slit sizes on the behaviour of a cylinder subjected to VIV is investigated across different reduced velocities (Ur) at a Reynolds number (Re) of 100. The size of the slit (S/D) is adjusted from 0 (without slit) to 0.1 & 0.2, where S corresponds to the width of slit & D the cylinder diameter. The mass and damping ratios are fixed at m* = 10 and ζ = 0.005, respectively, while Ur is varied from 2 to 10. The numerical analysis is conducted using Ansys/Fluent, incorporating mesh motion to consider cylinder vibration. The outcomes are presented in terms of vibration amplitude & frequency, drag & lift coefficients, Strouhal number, and vorticity contours. The findings suggest that the slit reduces lift and drag coefficients, effectively suppressing VIV. Examining maximum vibration amplitude, a 10% slit results in a 5.16% decrease, whereas a 20% slit leads to a substantial 34.27% reduction compared to a solid cylinder.

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Section: Model Validationmentioning

confidence: 99%

Passive Vibration Reduction in Circular Cylinders: The Role of Slits

Ali,

Islam,

Janajreh

2024

Proceedings of the 9th World Congress on Momentum, Heat and Mass Transfer

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“…Wanderley and Soares [90] modeled the VIV of spring-mounted cylinder allowed to vibrate in the transverse direction only. They carried out numerical solution of unsteady Reynolds-averaged Navier-Stokes (URANS) equations and used k-ε model to account for turbulence.…”

Section: Flow Over Unheated Single Cylindermentioning

confidence: 99%

Flow-Induced Vibrations of Single and Multiple Heated Circular Cylinders: A Review

et al. 2021

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This study is an effort to encapsulate the fundamentals and major findings in the area of fluid-solid interaction, particularly the flow-induced vibrations (FIV). Periodic flow separation and vortex shedding stretching downstream induce dynamic fluid forces on the bluff body and results in oscillatory motion of the body. The motion is generally referred to as flow-induced vibrations. FIV is a dynamic phenomenon as the motion, or the vibration of the body is subjected to the continuously changing fluid forces. Sometimes FIV is modeled as forced vibrations to mimic the vibration response due to the fluid forces. FIV is a deep concern of engineers for the design of modern heat exchangers, particularly the shell-and-tube type, as it is the major cause for the tube failures. Effect of important parameters such as Reynolds number, spacing ratio, damping coefficient, mass ratio and reduced velocity on the vibration characteristics (such as Strouhal number, vortex shedding, vibration frequency and amplitude, etc.) is summarized. Flow over a bluff body with wakes developed has been studied widely in the past decades. Several review articles are available in the literature on the area of vortex shedding and FIV. None of them, however, discusses the cases of FIV with heat transfer. In particular systems, FIV is often coupled to heat transfer, e.g., in nuclear power plants, FIV causes wear and tear to heat exchangers, which can eventually lead to catastrophic failure. As the circular shape is the most common shape for tubes and pipes encountered in practice, this review will only focus on the FIV of circular cylinders. In this attempt, FIV of single and multiple cylinders in staggered arrangement, including tandem and side-by-side arrangement is summarized for heated and unheated cylinder(s) in the one- and two-degree of freedom. The review also synthesizes the effect of fouling on heat transfer and flow characteristics. Finally, research prospects for heated circular cylinders are also stated.

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“…As noticed by Unal et al [26], the lifting force on the cylinder is closely related to the magnitude of the velocity fluctuation in the shear layer. Additionally, the wake flow characteristics of the cylinder are affected by the roughness of the cylinder surface [27]. As seen from Chang et al [28] and Park et al [29], the boundary layer transition can be effectively triggered by installing rough attachments on the symmetric position on the surface of a smooth cylinder, that is, in the range of subcritical (laminar) Reynolds numbers, the fluid will show the flow characteristics of supercritical (turbulent) flow.…”

Section: Introductionmentioning

confidence: 99%

Flow-Induced Motion and Energy Conversion of the Cir-T-Att Oscillator in a Flow Field with a High Reynolds Number

Ran

Lian

Yan

et al. 2023

JMSE

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The present study aims to systematically investigate the effects of a high Reynolds number on the flow-induced motion and energy conversion of the Cir-T-Att oscillator. Experiments are conducted in six Reynolds number ranges (2.89 × 104~6.51 × 104 < Re < 7.71 × 104~15.21 × 104) in regimes of TrSL2, TrSL3 and TrBL0. The system total damping ratio (ζtotal) is adjusted by varying excitation voltages (VB) with a controllable magnetic damping system. The VB is varied from 0 V to 165 V, corresponding to 0.082 ≤ ζtotal ≤ 1.153. The amplitude, frequency, fluid force, spectral content, active power, and upper limit of power output are analyzed. The results show that the Reynolds number affects both amplitude and global response characteristics. The active power increases with an increasing Reynolds number within the upper branch. The maximum power output of the Cir-T-Att oscillator reaches 10.43 W, appearing at Re = 14.67 × 104 (D = 0.16 m, ζtotal = 0.468, Ur = 6.34), while the maximum upper limit of power output is 17.80 W at Re = 15.21 × 104 (D = 0.16 m, ζtotal = 0.678, Ur = 6.57).

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Vortex-induced vibration on a two-dimensional circular cylinder with low Reynolds number and low mass-damping parameter

Cited by 40 publications

References 20 publications

Passive Vibration Reduction in Circular Cylinders: The Role of Slits

Passive Vibration Reduction in Circular Cylinders: The Role of Slits

Flow-Induced Vibrations of Single and Multiple Heated Circular Cylinders: A Review

Flow-Induced Motion and Energy Conversion of the Cir-T-Att Oscillator in a Flow Field with a High Reynolds Number

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