Effect of initial roll or pitch angles on the vortex-induced motions (VIM) of floating circular cylinders with a low aspect ratio

Fujarra, André Luís Condino; Cenci, Fredi; Silva, Leandro S. P.; Hirabayashi, Shinichiro; Suzuki, Hiroki; Gonçalves, Rodolfo T.

doi:10.1016/j.oceaneng.2022.111574

Cited by 5 publications

(4 citation statements)

References 10 publications

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“…4 that vortical structures leaving the computational domain at x∕D = 35 re-enter the Eulerian complementary domain at x∕D = 0.0 due to the periodic boundary conditions imposed by the Fourier pseudo-spectral method (FPSM). Simultaneously, it is noted that these vortical structures are attenuated until their complete extinction, (19) k j ûj = 0 facilitated by the use of both buffer and forcing zones. The imposition of periodic boundary conditions is the main challenge when working with the FPSM.…”

Section: Cylinder Anchored With a Spring-damper System Verticalmentioning

confidence: 99%

“…According to [48], FIV, in single phase flows, is classified into three types based on excitation characteristics: extraneously-induced excitation (EIE), instability-induced excitation (IIE) and motioninduced excitation (MIE). Each excitation can lead to four distinct phenomena: vortex-induced-vibration (VIV), vortex-induced-motion (VIM), wake-induced-vibration (WIV), galloping and flutter [14,19,42].…”

Section: Introductionmentioning

confidence: 99%

“…In wind engineering, interactions between flow and wind turbine blades and towers [29,64], as well as the interaction of turbine wakes, modify the overall wind potential in wind farms (WIV). Offshore wind turbines also face FSI issues [19,34], as they experience vibrations induced by both marine currents and waves. Power transmission towers and cables are also susceptible to flow-induced vibrations (galloping).…”

Section: Introductionmentioning

confidence: 99%

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Coupling of the immersed boundary and Fourier pseudo-spectral methods applied to solve fluid–structure interaction problems

Nascimento,

Mariano,

da Silveira Neto

et al. 2024

J Braz. Soc. Mech. Sci. Eng.

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The current manuscript addresses fluid–structure interaction (FSI) problems to the analysis of vortex-induced vibration (VIV), employing the methodology designated as IMERSPEC2D. The approach seamlessly integrates the Fourier pseudo-spectral method (FPSM) and the immersed boundary method (IBM) to solve the Navier–Stokes (NS) and continuity equations. Simultaneously, the effects of cylindrical structure, involving 1 and 2 degrees of freedom (d.o.f.) are simulated, by incorporating structural motion equations into NS via the IBM source term and implementing a two-way FSI algorithm. In the paper are presented the comparison of low and high-order temporal integration methods applied to solve the dynamic behavior of the structure and the dimensionless of the cylinder’s structural motion equations, resulting in an increase in computational time step from 1E($$-9$$ - 9 ) to 1E($$-3$$ - 3 ). Validation results to refined mesh simulations include the accurate representation of the lock-in phenomenon to simulations of 1 d.o.f. obtaining the range between reduced velocity 5.456 and 5.568 and the maximal amplitude is 0.352. Notably, the eight-shape pattern of the 2 d.o.f. cylinder displacement is obtained and the formation of C2S wake patterns is achieved, as presented by other authors. In conclusion, the dimensionless approach reduces computational time, while the high-order both of IMERSPEC methodology and time advancement integration to FSI improve the results of the cylinder’s motion and alters distinct vortex shedding patterns in fluid dynamics.

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Section: Cylinder Anchored With a Spring-damper System Verticalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Coupling of the immersed boundary and Fourier pseudo-spectral methods applied to solve fluid–structure interaction problems

Nascimento,

Mariano,

da Silveira Neto

et al. 2024

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

show abstract

“…The effects of initial roll or pitch angles on the VIM amplitudes of a floating circular cylinder with a low aspect ratio (m * = 1, A R = 1.5) were investigated experimentally [74], with Reynolds numbers from 1.2 × 10 4 to 1.0 × 10 5 . The reduced velocity varied from 1 to 12.…”

Section: Model Tests On Sparmentioning

confidence: 99%

State-of-the-Art Review of Vortex-Induced Motions of Floating Offshore Wind Turbine Structures

Yin

Passano

Jiang

et al. 2022

JMSE

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The motivation for this study is the fast development of floating offshore wind energy and the immature methodology and engineering practice related to predictions of vortex-induced motions (VIM). Benefiting from the oil and gas industry, in the past several decades, extensive knowledge and experience on vortex-induced vibrations (VIV) on slender marine structures has been gained. As the learnings from these efforts should be transferred and adapted to the renewable energy industry, a state-of-the-art review on influential VIM research has been carried out in this paper, focusing on: (1) engineering practice, (2) model tests, (3) numerical calculation, and (4) field measurement. Engineering gaps and potential research topics are identified as future work.

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The transformation mechanisms of vortex structures on vortex-induced vibration of an elastically mounted sphere by Lorentz force

et al. 2023

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Effect of initial roll or pitch angles on the vortex-induced motions (VIM) of floating circular cylinders with a low aspect ratio

Cited by 5 publications

References 10 publications

Coupling of the immersed boundary and Fourier pseudo-spectral methods applied to solve fluid–structure interaction problems

Coupling of the immersed boundary and Fourier pseudo-spectral methods applied to solve fluid–structure interaction problems

State-of-the-Art Review of Vortex-Induced Motions of Floating Offshore Wind Turbine Structures

The transformation mechanisms of vortex structures on vortex-induced vibration of an elastically mounted sphere by Lorentz force

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