Large Eddy Simulation of a Smooth Circular Cylinder Oscillating Normal to a Uniform Flow

Tutar, Mustafa; Holdo̸, A. E.

doi:10.1115/1.1287270

Cited by 35 publications

(26 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, it is stated by (Sarpkaya, 2004) that a greater understanding about the wake -boundary layer interaction will be achieved by simulating VIV with LES and DNS. 2D and 3D simulations of VIV were made by (Tutar & Holdo, 2000) to investigate the vortex structure formed behind a smooth circular cylinder at = 24000. A hybrid RANS-LES method named as Detached Eddy Simulation (DES) was used to solve for 3D simulation of VIV of a circular cylinder by (Saltara, D'Agostini Neto, & Lopez, 2011)at = 10000.…”

Section: Dns Allows a Direct Solution Of Navier-stokesmentioning

confidence: 99%

2-D Urans Simulations of Vortex Induced Vibrations of Circular Cylinder at Trsl3 Flow Regime

Kınacı

2016

JAFM

View full text Add to dashboard Cite

Research on vortex-induced vibrations (VIV) mainly involves experimental science but building laboratory setups to investigate the flow are expensive and time consuming. Computational fluid dynamics (CFD) methods may offer a faster and a cheaper way to understand this phenomenon depending on the solution approach to the problem. The context of this paper is to present the author's computational approach to solve for vortex-induced vibrations which cover extensive explanations on the mathematical background, the grid structure and the turbulence models implemented. Current computational research on VIV for smooth cylinders is currently restricted to flows that have Reynolds numbers below 10,000. This paper describes the method to approach the problem with URANS and achieves to return satisfactory results for higher Reynolds numbers.The computational approach is first validated with a benchmark experimental study for rather low Reynolds number which falls into TrSL2 flow regime. Then, some numerical results up to = 130,000, which falls into TrSL3 flow regime,are given at the end of the paper to reveal the validity of the approach for even higher Reynolds numbers.

show abstract

Section: Dns Allows a Direct Solution Of Navier-stokesmentioning

confidence: 99%

2-D Urans Simulations of Vortex Induced Vibrations of Circular Cylinder at Trsl3 Flow Regime

Kınacı

2016

JAFM

View full text Add to dashboard Cite

show abstract

“…The immediate concern with a 2D simulation is the assumption of two-dimensionality. Most 2D codes over-predict the drag coefficient for large Reynolds numbers by 5-10% [11] and the results from 3D codes provide better agreement with experimental data (confirmed by [9]). Reference [11] argue that a 2D simulation has its merits since the lift and drag coefficients are predicted more accurately when VIV begins, because at this point, the wake correlation length increases and the 3D influence of vortex shedding is diminished.…”

Section: B Moving Cylindersmentioning

confidence: 79%

“…It would seem then, that for the immediate future, the simulation of vortex induced vibrations can best be accomplished using large eddy simulation, and this is the focus of the work outlined in this section. Reference [9] investigated the benefits of 3D simulation using a 2D and 3D sub-grid scale LES model. They forced a cylinder to oscillate in the transverse direction at A y /D = 0.11, Re = 2.4x10 4 , and V r = 5.4 (where A y is the amplitude of motion in the transverse direction, D is the cylinder diameter, and V r is the reduced velocity) and compared the results.…”

Section: B Moving Cylindersmentioning

confidence: 99%

Numerical Investigation of the Influence of Span-wise Force Variation in Circular Cylinders Undergoing Vortex Induced Vibrations at High Reynolds Number

Murrin

Militzer

Bose³

et al. 2007

Oceans 2007

View full text Add to dashboard Cite

Abstract-The focus of this research is on the development of a new approach for simulating vortex induced vibrations on marine risers at high Reynolds numbers. This method considers the span-wise variation of the lift and drag forces, and determines the moment acting on the cylinder. The predicted motion then consists of a rotational component to accompany the traditional cross-stream and stream-wise translations normally associated with vortex induced vibrations. This was accomplished by describing the motion of the cylinder using a set of springs and dampers. A moment acting on the cylinder causes the springs on one end to compress, and stretch on the other, thus rotating the cylinder.A Large Eddy Simulation (LES) computational fluid dynamics code running on 16 3Ghz processors was used to calculate the unsteady flow and at each time step the hydrodynamic forces acting on the cylinder were calculated in a separate routine based on the pressure distribution around the cylinder. This information was then used to solve two second-order ordinary differential equations, which gave the velocity and displacement of the cylinder in cross-flow and rotational planes. This information was transferred back to the code where the cylinder was displaced and another cycle of calculations was started.The simulated results showed that the correlation length was higher for a cylinder subject to pure translation compared to a cylinder free to translate and rotate in the cross-stream direction. This has implications for current numerical and experimental techniques since it has been traditionally assumed that the flow around a circular cylinder becomes two-dimensional during vortex induced vibrations. Consequently, empirical,numerical and experimental models have generally only considered cross stream and/or stream-wise translation. The extent to which the experimental apparatus or harmonic model may have influenced the behavior of the riser by eliminating span-wise amplitude variation is important information that should be considered for future riser designs.

show abstract

“…Their numerical results showed good agreement with the observation from experimental results of Feng (1968). Tutar and holdo (2000) used LES model in conjunction with the finite element method for a cylinder subjected to forced oscillation at Re= 4 2 10 × and found that three-dimensional representation is necessary to obtain accurate results. Michelassi, et al (2003) stated that LES is able to provide a much deeper insight in the wake-boundary layer interaction mechanism when comparing to two-dimensional unsteady RANS simulations.…”

Section: Turbulence Modelmentioning

confidence: 99%

Effect of bidirectional internal flow on fluid.structure interaction dynamics of conveying marine riser model subject to shear current

Chen¹,

Kim²

2012

International Journal of Naval Architecture and Ocean Engineeri

View full text Add to dashboard Cite

show abstract

Large Eddy Simulation of a Smooth Circular Cylinder Oscillating Normal to a Uniform Flow

Cited by 35 publications

References 27 publications

2-D Urans Simulations of Vortex Induced Vibrations of Circular Cylinder at Trsl3 Flow Regime

2-D Urans Simulations of Vortex Induced Vibrations of Circular Cylinder at Trsl3 Flow Regime

Numerical Investigation of the Influence of Span-wise Force Variation in Circular Cylinders Undergoing Vortex Induced Vibrations at High Reynolds Number

Effect of bidirectional internal flow on fluid.structure interaction dynamics of conveying marine riser model subject to shear current

Contact Info

Product

Resources

About