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Large-eddy simulation of the turbulent near wake behind a circular cylinder: Reynolds number effect

Large-eddy simulation of the turbulent near wake behind a circular cylinder: Reynolds number effect
Large-eddy simulation of the turbulent near wake behind a circular cylinder: Reynolds number effect
The purpose of the present work is <!–<query>The highlights are in an incorrect format. Hence they have been deleted. Please refer the online instructions: http://www.elsevier.com/highlights and provide 3-5 bullet points.</query>–>to study the effect of the Reynolds number on the near-wake structure and separating shear layers behind a circular cylinder. Three-dimensional unsteady large-eddy simulation is carried out and two different subgrid scale models are applied in order to evaluate the turbulent wake reasonably. The Reynolds number based on the free-stream velocity and the cylinder diameter is ranging from Re = 5500–41,300, corresponding to the full development of the shear-layer instability in the intermediate subcritical flow regime. For a complete validation of this numerical study, hydrodynamic bulk coefficients are computed and compared to experimental measurements and numerical studies in the literature. Special focus is made on the variations of both the large-scale near-wake structure and the small-scale shear-layer instability with increasing Reynolds numbers. The present numerical study clearly shows the broadband nature of the shear-layer instability as well as the dependence of the shear-layer frequency especially on the high Reynolds numbers.
1-8
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
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 (2015) Large-eddy simulation of the turbulent near wake behind a circular cylinder: Reynolds number effect. Applied Ocean Research, 49 (1), 1-8. (doi:10.1016/j.apor.2014.10.005).

Record type: Article

Abstract

The purpose of the present work is <!–<query>The highlights are in an incorrect format. Hence they have been deleted. Please refer the online instructions: http://www.elsevier.com/highlights and provide 3-5 bullet points.</query>–>to study the effect of the Reynolds number on the near-wake structure and separating shear layers behind a circular cylinder. Three-dimensional unsteady large-eddy simulation is carried out and two different subgrid scale models are applied in order to evaluate the turbulent wake reasonably. The Reynolds number based on the free-stream velocity and the cylinder diameter is ranging from Re = 5500–41,300, corresponding to the full development of the shear-layer instability in the intermediate subcritical flow regime. For a complete validation of this numerical study, hydrodynamic bulk coefficients are computed and compared to experimental measurements and numerical studies in the literature. Special focus is made on the variations of both the large-scale near-wake structure and the small-scale shear-layer instability with increasing Reynolds numbers. The present numerical study clearly shows the broadband nature of the shear-layer instability as well as the dependence of the shear-layer frequency especially on the high Reynolds numbers.

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More information

Submitted date: 27 March 2014
Accepted/In Press date: 20 October 2014
e-pub ahead of print date: 23 November 2014
Published date: 20 January 2015
Organisations: Fluid Structure Interactions Group

Identifiers

Local EPrints ID: 372047
URI: http://eprints.soton.ac.uk/id/eprint/372047
PURE UUID: 0c536979-4079-41cc-a5ea-420090464c94
ORCID for P.A. Wilson: ORCID iD orcid.org/0000-0002-6939-682X

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Date deposited: 24 Nov 2014 12:56
Last modified: 27 Apr 2022 01:32

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Contributors

Author: Sunghan Kim
Author: P.A. Wilson ORCID iD
Author: Zhi-Min Chen

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