Three-dimensional numerical simulation of vortex-induced vibration of an elastically mounted rigid circular cylinder in steady current

Zhao, Ming; Cheng, Liang; An, Hongwei; Lü, Lin

doi:10.1016/j.jfluidstructs.2014.05.016

Cited by 118 publications

(58 citation statements)

References 47 publications

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“…To accommodate the motion of the riser, the displacement diffusion model (Zhao and Cheng, 2011;Zhao et al, 2014) for mesh motion is adopted. The displacements of the mesh points are calculated based on the following equation:…”

Section: Mesh Deformationmentioning

confidence: 99%

Numerical simulation of vortex-induced vibration of a vertical riser in uniform and linearly sheared currents

Wang

Xiao

2016

Ocean Engineering

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This paper presents a numerical study on vortex-induced vibration (VIV) of a vertical riser subject to uniform and linearly sheared currents. The model vertical riser tested at the MARINTEK by ExxonMobil is considered. The predicted numerical results are in good agreement with the experimental data. It is found that the dominant mode numbers, the maximum root mean square amplitudes, the dominant frequencies and the fatigue damage indices increase with the flow velocity. A standing wave response is observed for the single-mode in-line (IL) and cross-flow (CF) vibrations. Dual resonance is found to occur at most of the locations along the riser. At some locations along the riser, a third harmonic frequency component is observed in the CF response and a frequency component at the CF response frequency is found in the IL response apart from the frequency component at twice the CF response frequency. The majority of the vortex shedding shows a clear 2S pattern, whereas a 2P mode is observed near the position where the maximum vibration amplitude appears. The higher IL fatigue damage in the present study emphasises the importance of the IL fatigue damage especially in the design of low flow velocity or low mode number applications

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Section: Mesh Deformationmentioning

confidence: 99%

Numerical simulation of vortex-induced vibration of a vertical riser in uniform and linearly sheared currents

Wang

Xiao

2016

Ocean Engineering

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“…The size of the computational domain on the xy-plane is the same as the one used in the 2D simulations. The finite element method for solving the 3D NS equations is the same as the one used in Zhao et al (2014). In the 3D simulation, the mass ratio is the same as that used in the 2D simulations and the damping ratio is also zero.…”

Section: Vortex Shedding Modementioning

confidence: 99%

“…In the practical engineering, FIV of cylindrical structures mainly occurs at large Reynolds numbers in the turbulent flow regime. Because three-dimensional simulations are extremely time consuming, they were mainly used to simulate FIV at relative low Reynolds numbers (Navrose and Mittal, 2013;Zhao et al, 2014). In this study, the flow is simulated by solving the two-dimensional URANS equations using the Petrov-Galerkin Finite Element Method (PG-FEM) and the vibration of the cylinder is predicted by solving the equation of the motion.…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional numerical study of vortex-induced vibration and galloping of square and rectangular cylinders in steady flow

et al. 2015

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“…Zhao and Cheng 27 studied vortex-induced vibration of a circular cylinder of finite length and found the vortex shedding from the free end of the cylinder has a significant effect on the response. Zhao et al 28 investigated the flow transition for 1-dof VIV of a cylinder in the cross-flow direction and reported that for a reduced velocity of 6 in the lock-in regime, the critical Reynolds number for flow transition from 2D to 3D is higher than that for flow past a stationary cylinder.…”

Section: Ming Zhaomentioning

confidence: 99%

“…In order to achieve maximum possible response amplitude, the damping coefficient is set to zero. 25,28 Labbe and Wilson 40 reported that, to capture wake flow properly, the minimum length of the cylinder is 4D for Reynolds numbers up to about 300 and between πD/2 and πD for higher Reynolds numbers. Lei et al 41 also found that the minimum length of the cylinder is twice the cylinder diameter for Re = 1000 to predict the forces on the cylinder accurately.…”

Section: Ming Zhaomentioning

confidence: 99%

Numerical simulation of vortex-induced vibration of a circular cylinder in a spanwise shear flow

Zhao

2015

Physics of Fluids

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Vortex-induced vibration of a circular cylinder with a length-to-diameter ratio of 19.2 in a spanwise shear flow is investigated numerically. The Reynolds numbers based on the velocity at the centre of the cylinder and the mass ratio are 500 and 2, respectively. The responses of the cylinder in shear flows with shear factors of 0.05 and 0.1 are compared with that in the uniform flow. Although the oscillation of the lift force for a stationary cylinder in a sheared flow is very weak, it is found that if the cylinder is allowed to vibrate, the lock-in regime and the maximum response amplitude are comparable with their counterparts for a cylinder in a uniform flow. The maximum response amplitude for a shear factor of 0.05 is found slightly greater than that for a uniform flow. In the lock-in regime, the vortex shedding and the oscillation of the sectional lift coefficient are found to synchronize (have a same frequency) along the cylinder span, leading to strong vibration of the cylinder. The sectional lift coefficient changes from being in phase to being out of phase with the response displacement at a location on the cylinder span, and the location where the lift coefficient changes its phase depends on the reduced velocity. The phase change of the lift coefficient corresponds to the change in the vortex shedding mode. The role of the sectional lift coefficient in the vibration varies along the cylinder span. For a small reduced velocity in the lock-in regime, the sectional lift forces near the high-velocity end of the cylinder excite the vibration, while those at the rest of the cylinder span damp the vibration. With increasing reduced velocity, the location where the sectional lift forces excite the vibration moves towards the low-velocity end of the cylinder.

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Three-dimensional numerical simulation of vortex-induced vibration of an elastically mounted rigid circular cylinder in steady current

Cited by 118 publications

References 47 publications

Numerical simulation of vortex-induced vibration of a vertical riser in uniform and linearly sheared currents

Numerical simulation of vortex-induced vibration of a vertical riser in uniform and linearly sheared currents

Two-dimensional numerical study of vortex-induced vibration and galloping of square and rectangular cylinders in steady flow

Numerical simulation of vortex-induced vibration of a circular cylinder in a spanwise shear flow

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