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The flow around stationary and elastically-mounted circular cylinders in tandem and staggered arrangements

Griffith, Martin and Lo Jacono, David and Sheridan, John and Leontini, Justin S. The flow around stationary and elastically-mounted circular cylinders in tandem and staggered arrangements. (2016) In: 20th Australasian Fluid Mechanics Conference, 5 December 2016 - 5 December 2016 (Perth, Australia).

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Abstract

A numerical study is presented of the flow around two circular cylinders in tandem and staggered arrangements in a freestream, examining the fluid forces and vortex-shedding behaviour, as well as the oscillation of both cylinders when allowed to move and vibrate in response to the flow. The streamwise distance between the cylinder centres is 1.5 diameters, while the cross-stream offset is varied from 0.0 to 5.0. The Reynolds number, based on cylinder diameter, D, and freestream velocity, U, is 200. Reduced velocity, U∗ = U , where fN is the fND spring natural frequency, is varied from 0.0 to 14.0. Results are obtained using a sharp-interface immersed boundary finite- difference method. For the stationary cylinders a range of be- haviours are observed over the cylinder offset range, includ- ing a difference in primary vortex-shedding frequency when the crossstream offset is greater than 1.5D. For the elastic- mounting, in contrast to existing results in the literature, three modes of vortex-shedding and oscillation are observed over the U∗ range for the tandem arrangement. These modes are dis- tinct in the phase difference between the front and rear cylinder oscillation, as well as the number of vortices shed from each cylinder.

Item Type:Conference or Workshop Item (Paper)
Additional Information:Thanks to 20th Australasian Fluid Mechanics Conference : http://afms.org.au/20AFMC/
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Monash University (AUSTRALIA)
Other partners > Swinburne University of Technology (AUSTRALIA)
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Deposited On:13 Nov 2017 09:40

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