Unsteady dynamics in the streamwise-oscillating cylinder wake for forcing frequencies below lock-on

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Abstract

Forcing a cylinder in the streamwise direction with a frequency much lower than the stationary shedding frequency significantly alters wake dynamics. During certain portions of the forcing cycle the wake resembles that of a stationary cylinder, while in others it exhibits strong unsteadiness. Although a range of flow phenomena are observed, it is shown that a novel time scaling framework can be used to relate the forced and unforced systems.

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Authors

Maysam Shamai

Scott T. M. Dawson

Illinois Institute of Technology

Igor Mezić

University of California, Santa Barbara

Journals

Physical Review Fluids

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California Institute of Technology

University of California, Santa Barbara

Illinois Institute of Technology

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Shamai et al. (Mon,) studied this question.

synapsesocial.com/papers/6a006187ef8139f8ff778f7b — DOI: https://doi.org/10.1103/physrevfluids.6.074702

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Also consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

Vortex shedding from a cylinder vibrating in line with an incident uniform flow· 1976 · 232 citations
The aerodynamic effects of wing rotation and a revised quasi-steady model of flapping flight· 2002 · 768 citations
The Quasi-Steady-State Assumption: A Case Study in Perturbation· 1989 · 736 citations
On dynamic mode decomposition: Theory and applications· 2014 · 1,446 citations
Variants of Dynamic Mode Decomposition: Boundary Condition, Koopman, and Fourier Analyses· 2012 · 720 citations

Unsteady dynamics in the streamwise-oscillating cylinder wake for forcing frequencies below lock-on

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Abstract

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Discussion

Cite this study

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