Numerical simulation of force and wake models of an oscillating cylinder
Numerical simulation of force and wake models of an oscillating cylinder
The turbulent flow behind a circular cylinder subjected to forced oscillation is numerically studied at a Reynolds number of 5500 by using three-dimensional Large Eddy Simulations (3-D LES) technique with a Smagorinsky type model. The filtered equations are discretised using the finite volume method with an O-type structured grid and a second-order accurate method in both time and space. Firstly, the main wake parameters of a stationary cylinder are examined and compared in the different grid resolutions. Secondly, a transversely oscillating cylinder with a constant amplitude in a uniform flow is investigated. The cylinder oscillation frequency ranges between 0.75 and 0.95 of the natural Kármán frequency, and the excitation amplitude is moderate, 50% of the cylinder diameter. In the present study, the flow characteristics of an oscillating cylinder are numerically examined and the corresponding wake modes are captured firstly in 3-D LES at Re=5500. A transition between different wake modes is firstly investigated in a set of numerical simulations.
Forced oscillation, vortex-induced vibration, wake moderesponse, bluff-body wake, 3-D large eddy simulations, turbulent flow
216-225
Kim, Sunghan
0ed0c2b3-5e5c-409b-83f9-93a5b9ac9c06
Wilson, P.A.
8307fa11-5d5e-47f6-9961-9d43767afa00
Chen, Zhi-Min
e4f81e6e-5304-4fd6-afb2-350ec8d1e90f
January 2014
Kim, Sunghan
0ed0c2b3-5e5c-409b-83f9-93a5b9ac9c06
Wilson, P.A.
8307fa11-5d5e-47f6-9961-9d43767afa00
Chen, Zhi-Min
e4f81e6e-5304-4fd6-afb2-350ec8d1e90f
Kim, Sunghan, Wilson, P.A. and Chen, Zhi-Min
(2014)
Numerical simulation of force and wake models of an oscillating cylinder.
Journal of Fluids and Structures, 44, .
(doi:10.1016/j.jfluidstructs.2013.11.010).
Abstract
The turbulent flow behind a circular cylinder subjected to forced oscillation is numerically studied at a Reynolds number of 5500 by using three-dimensional Large Eddy Simulations (3-D LES) technique with a Smagorinsky type model. The filtered equations are discretised using the finite volume method with an O-type structured grid and a second-order accurate method in both time and space. Firstly, the main wake parameters of a stationary cylinder are examined and compared in the different grid resolutions. Secondly, a transversely oscillating cylinder with a constant amplitude in a uniform flow is investigated. The cylinder oscillation frequency ranges between 0.75 and 0.95 of the natural Kármán frequency, and the excitation amplitude is moderate, 50% of the cylinder diameter. In the present study, the flow characteristics of an oscillating cylinder are numerically examined and the corresponding wake modes are captured firstly in 3-D LES at Re=5500. A transition between different wake modes is firstly investigated in a set of numerical simulations.
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e-pub ahead of print date: 25 November 2013
Published date: January 2014
Keywords:
Forced oscillation, vortex-induced vibration, wake moderesponse, bluff-body wake, 3-D large eddy simulations, turbulent flow
Organisations:
Fluid Structure Interactions Group
Identifiers
Local EPrints ID: 359690
URI: http://eprints.soton.ac.uk/id/eprint/359690
ISSN: 0889-9746
PURE UUID: 3723f94a-d200-42ec-abac-23b6304fdef4
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Date deposited: 08 Nov 2013 13:38
Last modified: 15 Mar 2024 02:35
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Author:
Sunghan Kim
Author:
Zhi-Min Chen
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