Journal article

Effect of morphology on the large-amplitude flapping dynamics of an inverted flag in a uniform flow

Boyu Fan, Cecilia Huertas-Cerdeira, Julia Cosse, John E Sader, Morteza Gharib

JOURNAL OF FLUID MECHANICS | CAMBRIDGE UNIV PRESS | Published : 2019

Abstract

The stability of a cantilevered elastic sheet in a uniform flow has been studied extensively due to its importance in engineering and its prevalence in natural structures. Varying the flow speed can give rise to a range of dynamics including limit cycle behaviour and chaotic motion of the cantilevered sheet. Recently, the 'inverted flag' configuration - a cantilevered elastic sheet aligned with the flow impinging on its free edge - has been observed to produce large-amplitude flapping over a finite band of flow speeds. This flapping phenomenon has been found to be a vortex-induced vibration, and only occurs at sufficiently large Reynolds numbers. In all cases studied, the inverted flag has b..

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University of Melbourne Researchers

Grants

Awarded by Australian Research Council Centre of Excellence in Exciton Science


Funding Acknowledgements

We acknowledge funding from the Gordon and Betty Moore Foundation, the Lester Lees Aeronautics Summer Undergraduate Research Fellowship, the Australian Research Council Centre of Excellence in Exciton Science (CE170100026) and the Australian Research Council grants scheme.