Journal article

Large-amplitude flapping of an inverted-flag in a uniform steady flow – A vortex-induced vibration

JE Sader, J Cossé, D Kim, B Fan, M Gharib

Journal of Fluid Mechanics | Cambridge University Press | Published : 2016

Abstract

The dynamics of a cantilevered elastic sheet, with a uniform steady flow impinging on its clamped-end, have been studied widely and provide insight into the stability of flags and biological phenomena. Recent measurements by Kim et al. J. Fluid Mech. 736, R1 (2013) show that reversing the sheet’s orientation, with the flow impinging on its free-edge, dramatically alters its dynamics. In contrast to the conventional flag, which exhibits (small-amplitude) flutter above a critical flow speed, the inverted-flag displays large-amplitude flapping over a finite band of flow speeds. In this talk, we use a combination of mathematical theory, scaling analysis and measurement to establish that this lar..

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University of Melbourne Researchers