Transverse vortex-induced vibration of a circular cylinder on a viscoelastic support at low Reynolds number

Mishra, Rahul; Soti, Atul Kumar; Bhardwaj, Rajneesh; Kulkarni, Salil S.; Thompson, Mark C.

doi:10.1016/j.jfluidstructs.2020.102997

Cited by 17 publications

(6 citation statements)

References 40 publications

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“…(2018), Mishra et al. (2020) and Sharma, Garg & Bhardwaj (2022), the criteria to classify different VIV branches are as follows. The initial branch is demarcated with monotonically increasing and , multiple frequencies in , the vibration frequency overlaps the vortex shedding frequency of a stationary cylinder ( ), and .…”

Section: Resultsmentioning

confidence: 99%

“…Resolution studies for base flow and stability calculations are considered separately. For the base-flow simulations, the domain and element distribution is based on the previous study of VIV of a circular cylinder, where resolution and other validation studies were reported (Mishra et al 2020). For the stability calculations, care has been taken during the construction of the mesh to ensure adequate resolution, as verified through the base-flow study.…”

Section: -D Resolution Studiesmentioning

confidence: 99%

“…These branches are not necessarily one-to-one related to those observed for high-Reynolds number VIV at a low mass-damping ratio. Based on the observation by Govardhan & Williamson (2000), Leontini, Thompson & Hourigan (2006b), Soti et al (2018), Mishra et al (2020) and Sharma, Garg & Bhardwaj (2022), the criteria to classify different VIV branches are as follows. The initial branch is demarcated with monotonically increasing A * and C L,max , multiple frequencies in f y , the vibration frequency overlaps the vortex shedding frequency of a stationary cylinder ( f * ≈ f v /f s ), φ tot ≈ 0 and φ vor ≈ 0.…”

Section: Response Curves For a Circular Cylinder Under Viv At Re = 15...mentioning

confidence: 99%

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Three-dimensional transition of the flow past an elastically mounted circular cylinder

Mishra,

Bhardwaj,

Thompson

2024

J. Fluid Mech.

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Floquet stability analysis and direct simulations of a circular cylinder undergoing vortex-induced vibration (VIV) are presented. Simulation predictions are examined for the reduced velocity range over which there is a strong and periodic resonant response: $U_r \in [4.0, 8.0]$ , focusing on a mass ratio of $m^* = 2.546$ matching a number of previous investigations. Over most of this range, the dominant wake modes present are analogous to modes A, B and QP (quasi-periodic) observed in a stationary circular cylinder wake. However, at $U_r = 4.5$ , the dominant modes are B, QP and a subharmonic mode (SH), whereas at $U_r = 4.0$ , the two-dimensional base state switches to a $P+S$ wake. The critical Reynolds number for two- to three-dimensional transition is observed to decrease with an increase of $U_r$ , in line with a decreasing response amplitude. Over this range, the minimum ${\textit {Re}}$ for which the wake remains two-dimensional is 202, which occurs at $U_r = 7.5$ , but this increases to ${\textit {Re}}_{cr} = 300$ at $U_r = 4.5$ , noting the critical Reynolds number for a stationary circular cylinder is ${\textit {Re}}_{cr}=189$ . The corresponding critical spanwise wavelengths for $U_r = 4.5$ and 8 are $1.4D$ (mode B) and $4.0D$ (mode A), respectively. Simulations indicate that even at $Re=300$ , flow three-dimensionality increases the amplitude of the lower branch considerably. The investigation establishes the role of oscillation amplitude and reduced velocity in three-dimensional transition for elastically mounted systems.

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Section: Resultsmentioning

confidence: 99%

Section: -D Resolution Studiesmentioning

confidence: 99%

Section: Response Curves For a Circular Cylinder Under Viv At Re = 15...mentioning

confidence: 99%

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Three-dimensional transition of the flow past an elastically mounted circular cylinder

Mishra,

Bhardwaj,

Thompson

2024

J. Fluid Mech.

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“…(1) where m (mass per unit length), reduced velocity as defined by Summer and Fredsoe (1997) the ratio of the cylinder's wavelength to its diameter in the trajectory of the cylinder [18]- [19], respectively and 𝑓 𝑛 is the water frequency at which a cylinder vibrates naturally [20] To evaluate the energy transfer of the cylinder, a one cycle's supply of energy gained from the cylinder's flow is defined as Equation (3) and Equation (4).…”

Section: Geometrical Modelling and Boundary Conditionmentioning

confidence: 99%

Numerical Simulation on VIV Energy Harvesting of Four Cylinders in Close Staggered Formation with Different Mass Ratios

Alias,

Zailani,

Mohd

et al. 2024

J. Phys.: Conf. Ser.

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Nowadays, the demand for marine renewable and clean energy from fluid flow in the oil and gas industry has made electricity the most sought-after and indispensable source of uncontrollable power worldwide. Vortex-Induced Vibrations (VIV) energy harvesting is a promising technology in harnessing energy from flowing water bodies. This study focuses on numerically investigating the VIV of rigid circular cylinders as a sustainable energy source, utilizing a Vortex-Induced Vibration Aquatic Clean Energy (VIVACE) converter to harvest energy from the ocean. Specifically, the research explores the vibration behavior of closely arranged cylinders with different mass ratios, both at low and high values. The study aims to understand the effects of mass ratios on the VIV converter’s performance with four cylinders in close staggered formation. The power conversion of the VIV energy converter model with varying mass ratios (ranging from 2.36 to 12.96) is thoroughly examined, with simulations conducted at a Reynolds number of 82000. The results demonstrate that the maximum converted power peaks at 7.48 W for a mass ratio of 2.36, whereas a higher mass ratio of 12.96 only yields 4.33 W. This emphasizes the significant impact of lower mass ratios in enhancing the power generation from VIV. Overall, the findings of this research provide essential insights to optimize the layout of VIVACE converters in a close staggered array, facilitating the efficient harvesting of energy from flowing water bodies for sustainable and clean energy resources.

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“…The response amplitude is the key characteristic of vortex induced motion [9][10] . The one degree-offreedom (DOF) motion (Cross-flow direction) was captured using a laser rangefinder in present work.…”

Section: Experiments Set-upmentioning

confidence: 99%

Experimental on the vortex induced motion suppression of floating spar-type wind turbine

Xiao

Fu²,

Bai

et al. 2022

J. Phys.: Conf. Ser.

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To investigate the suppression performance of the spar-type wind turbine vortex induced motion(VIM) with the addition of splitter plate, VIM model tests were carried out in a circulating water channel. Two different splitter plates width conditions were tested. In all the conditions, the cylinder was free to oscillate with one DOF. Results regarding response amplitudes and characteristic frequencies were presented and discussed. There was no obvious lock-in phenomenon on the vortex excitation motion of the cylinders with splitter plate, only some synchronization was observed. W/D=0.2 has better suppression performance than W/D=0.4 in vortex induced motion.

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Transverse vortex-induced vibration of a circular cylinder on a viscoelastic support at low Reynolds number

Cited by 17 publications

References 40 publications

Three-dimensional transition of the flow past an elastically mounted circular cylinder

Three-dimensional transition of the flow past an elastically mounted circular cylinder

Numerical Simulation on VIV Energy Harvesting of Four Cylinders in Close Staggered Formation with Different Mass Ratios

Experimental on the vortex induced motion suppression of floating spar-type wind turbine

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