Harvard University Division of Engineering and Applied Sciences Kavli Institute Wyss Institute School of Engineering and Applied Sciences Department of Organismic and Evolutionary Biology Harvard University
Interior Banner


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 6, 2013

people | research | education | publications | press | news & events | links | contact us | home

© Copyright 2006 President and Fellows of Harvard University.

Site design: Academic Web Pages