Effect of turbulence modelling on 3-D LES of transitional flow behind a circular cylinder
Effect of turbulence modelling on 3-D LES of transitional flow behind a circular cylinder
Results of a numerical evaluation of transitional flow behind a circular cylinder are presented. Three-dimensional calculations are performed in a frame of large eddy simulation at a Reynolds number of 41300 based on the free stream velocity and cylinder diameter for which previous experimental data is available for comparison. The flow in the transitional regime is characterized by the presence of multiple flow scales such as small-scale shear-layer vortices in freely separating boundary layers and large-scale vortex motion in the wake. Three different subgrid scales, namely the Smagorinsky, $k$-equation and dynamic $k$-equation models, are applied in order to evaluate such a challenging flow field at the higher Reynolds number. The effects of the subgrid scale modelling on the main wake parameters and mean flow statistics are discussed in detail and compared to available experimental measurement for the challenging flow regime.
LES, Turbulence modelling, Circular cylinder, Near-wake flow
19-25
Kim, Sunghan
0ed0c2b3-5e5c-409b-83f9-93a5b9ac9c06
Wilson, Philip A.
8307fa11-5d5e-47f6-9961-9d43767afa00
Chen, Zhi-Min
e4f81e6e-5304-4fd6-afb2-350ec8d1e90f
9 April 2015
Kim, Sunghan
0ed0c2b3-5e5c-409b-83f9-93a5b9ac9c06
Wilson, Philip A.
8307fa11-5d5e-47f6-9961-9d43767afa00
Chen, Zhi-Min
e4f81e6e-5304-4fd6-afb2-350ec8d1e90f
Kim, Sunghan, Wilson, Philip A. and Chen, Zhi-Min
(2015)
Effect of turbulence modelling on 3-D LES of transitional flow behind a circular cylinder.
Ocean Engineering, 100, .
(doi:10.1016/j.oceaneng.2015.03.014).
Abstract
Results of a numerical evaluation of transitional flow behind a circular cylinder are presented. Three-dimensional calculations are performed in a frame of large eddy simulation at a Reynolds number of 41300 based on the free stream velocity and cylinder diameter for which previous experimental data is available for comparison. The flow in the transitional regime is characterized by the presence of multiple flow scales such as small-scale shear-layer vortices in freely separating boundary layers and large-scale vortex motion in the wake. Three different subgrid scales, namely the Smagorinsky, $k$-equation and dynamic $k$-equation models, are applied in order to evaluate such a challenging flow field at the higher Reynolds number. The effects of the subgrid scale modelling on the main wake parameters and mean flow statistics are discussed in detail and compared to available experimental measurement for the challenging flow regime.
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Submitted date: 15 October 2014
Accepted/In Press date: 12 February 2015
Published date: 9 April 2015
Keywords:
LES, Turbulence modelling, Circular cylinder, Near-wake flow
Organisations:
Fluid Structure Interactions Group
Identifiers
Local EPrints ID: 374510
URI: http://eprints.soton.ac.uk/id/eprint/374510
ISSN: 0029-8018
PURE UUID: 2d2dad16-9796-4964-bf32-8ace41d09921
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Date deposited: 19 Feb 2015 13:41
Last modified: 15 Mar 2024 02:35
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Author:
Sunghan Kim
Author:
Zhi-Min Chen
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