Harvard University Division of Engineering and Applied Sciences Kavli Institute School of Engineering and Applied Sciences Department of Organismic and Evolutionary Biology Harvard University
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Flutter of a flag

The flutter of a flag in a gentle breeze, or the flapping of a sail in a rough wind are commonplace and familiar observations of a rich class of problems involving the interaction of fluids and structures, of wide interest and importance in science and engineering. In a recent study, we studied the mechanism that leads to this instability using a combination of analysis and scaling that lead us to a relatively simple theory for the critical velocity for the onset of flutter and the frequency of flapping.

Image courtesy of M. Argentina
Image courtesy of M. Argentina

Related Article

  • Fluid-flow induced flutter of a flag, Argentina, M. and L. Mahadevan, Proceedings of the National Academy of Sciences (USA), 102, 1829-34, 2005.  Click here for PDF version of article.



   Last Updated: January 31, 2018

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