The University of Southampton
University of Southampton Institutional Repository

Large eddy simulation of flow past stationary and oscillating square cylinders

Large eddy simulation of flow past stationary and oscillating square cylinders
Large eddy simulation of flow past stationary and oscillating square cylinders

Flow past stationary and oscillating square cylinders at Reynolds number 22,000 are studied using immersed boundary method (IBM) in large eddy simulation (LES), as the IBM is able to seamlessly simulate arbitrarily-moving bodies at a high efficiency. The square cylinders are forced to oscillate in a prescribed sinusoidal motion at reduced velocity 7.7, which corresponds to the resonance point. Two amplitude ratios A∕D = 0.05 and 0.1 based on a cylinder height D are studied. The accuracy of the current solver with the immersed boundary method is rigorously assessed against the reference data. To understand the effect of structural motion on the flow and turbulence, aerodynamics of the oscillating cylinder is compared with that of the stationary cylinder. It is found that the oscillation motion reduces the spanwise correlation of flow field and triggers earlier reattachment on the side faces. Consequently, more chaotic surface pressure is generated downstream the reattachment point, and a smaller correlation is observed between upper and lower surface pressures. This helps to fully understand the interaction of turbulence and the flow-induced motion of a structure.

Correlation, Immersed boundary method, Large eddy simulation, Oscillating square cylinders
0889-9746
1-20
Chen, Yongxin
634612c1-2eee-429e-b9f5-cea9fc105ffc
Djidjeli, Kamal
94ac4002-4170-495b-a443-74fde3b92998
Xie, Zheng-Tong
98ced75d-5617-4c2d-b20f-7038c54f4ff0
Chen, Yongxin
634612c1-2eee-429e-b9f5-cea9fc105ffc
Djidjeli, Kamal
94ac4002-4170-495b-a443-74fde3b92998
Xie, Zheng-Tong
98ced75d-5617-4c2d-b20f-7038c54f4ff0

Chen, Yongxin, Djidjeli, Kamal and Xie, Zheng-Tong (2020) Large eddy simulation of flow past stationary and oscillating square cylinders. Journal of Fluids and Structures, 97, 1-20, [103107]. (doi:10.1016/j.jfluidstructs.2020.103107).

Record type: Article

Abstract

Flow past stationary and oscillating square cylinders at Reynolds number 22,000 are studied using immersed boundary method (IBM) in large eddy simulation (LES), as the IBM is able to seamlessly simulate arbitrarily-moving bodies at a high efficiency. The square cylinders are forced to oscillate in a prescribed sinusoidal motion at reduced velocity 7.7, which corresponds to the resonance point. Two amplitude ratios A∕D = 0.05 and 0.1 based on a cylinder height D are studied. The accuracy of the current solver with the immersed boundary method is rigorously assessed against the reference data. To understand the effect of structural motion on the flow and turbulence, aerodynamics of the oscillating cylinder is compared with that of the stationary cylinder. It is found that the oscillation motion reduces the spanwise correlation of flow field and triggers earlier reattachment on the side faces. Consequently, more chaotic surface pressure is generated downstream the reattachment point, and a smaller correlation is observed between upper and lower surface pressures. This helps to fully understand the interaction of turbulence and the flow-induced motion of a structure.

Text
fluidstruc19 - Author's Original
Restricted to Repository staff only
Request a copy

More information

Submitted date: 29 April 2019
Accepted/In Press date: 17 July 2020
e-pub ahead of print date: 28 July 2020
Published date: August 2020
Additional Information: Funding Information: The computations were performed on the IRIDIS supercomputer facility at the University of Southampton, UK. Yongxin Chen acknowledges the overseas studentship from the Faculty of Engineering and Physical Sciences, the University of Southampton. Publisher Copyright: © 2020 Elsevier Ltd
Keywords: Correlation, Immersed boundary method, Large eddy simulation, Oscillating square cylinders

Identifiers

Local EPrints ID: 430618
URI: http://eprints.soton.ac.uk/id/eprint/430618
ISSN: 0889-9746
PURE UUID: 75702814-6753-42d6-ab27-78804f606990
ORCID for Zheng-Tong Xie: ORCID iD orcid.org/0000-0002-8119-7532

Catalogue record

Date deposited: 07 May 2019 16:30
Last modified: 27 Jul 2022 01:39

Export record

Altmetrics

Contributors

Author: Yongxin Chen
Author: Kamal Djidjeli
Author: Zheng-Tong Xie ORCID iD

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×