2017
DOI: 10.1017/jfm.2017.525
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Abstract: We present an effective reduced-order model (ROM) technique to couple an incompressible flow with a transversely vibrating bluff body in a state-space format. The ROM of the unsteady wake flow is based on the Navier–Stokes equations and is constructed by means of an eigensystem realization algorithm (ERA). We investigate the underlying mechanism of vortex-induced vibration (VIV) of a circular cylinder at low Reynolds number via linear stability analysis. To understand the frequency lock-in mechanism and self-s… Show more

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Cited by 57 publications
(34 citation statements)
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“…This sign change continues to the post-lock-in regime, where the high gradient region extends to the streamwise direction and becomes narrower in the transverse direction. We further generalize this variation of the wake feature contribution for Re > Re cr (= 44.7 (Yao & Jaiman 2017)). Figure 13 demonstrates the bluff body motion response and the modal energy contribution from the large-scale features of the wake.…”
Section: Wake Feature Interaction and Sustenance Of Viv Lock-inmentioning
confidence: 83%
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“…This sign change continues to the post-lock-in regime, where the high gradient region extends to the streamwise direction and becomes narrower in the transverse direction. We further generalize this variation of the wake feature contribution for Re > Re cr (= 44.7 (Yao & Jaiman 2017)). Figure 13 demonstrates the bluff body motion response and the modal energy contribution from the large-scale features of the wake.…”
Section: Wake Feature Interaction and Sustenance Of Viv Lock-inmentioning
confidence: 83%
“…This may be due to the fact that the flow exhibits a diverse set of complex phenomena despite its simple geometry. However, very few studies (Liberge & Hamdouni 2010;Yao & Jaiman 2017) are found on unsteady fluid-structure interaction systems. Here, we provide a modal reduction study on the flow past a freely vibrating sharpcornered square cylinder with two-degree-of-freedom motions.…”
Section: Contributions and Organizationmentioning
confidence: 99%
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“…(2015), Navrose (2016), Kou et al. (2017) and Yao & Jaiman (2017) also showed results that confirmed instability for . Meliga & Chomaz (2011) introduced a mapping of stable and unstable regions with respect to the parameter for flow past a circular cylinder free to oscillate in both the transverse and in-line directions.…”
Section: Introductionmentioning
confidence: 92%
“…Recently, the ERA-based ROM has been used for stability analysis and flow control problems by the fluid mechanics community in various instances (Ma et al 2011;Flinois, Morgans & Schmid 2015;Flinois & Morgans 2016;Yao & Jaiman 2017a). The work presented by Yao & Jaiman (2017b) attempts to construct a unified description of frequency lock-in for elastically mounted cylinders. The ERA-based ROM technique was used to extract generalized stability properties of the fluid-structure system of two-dimensional bluff bodies.…”
Section: Stability Analysis Via Model Reductionmentioning
confidence: 99%