Flutter of a flag

Feb 2005

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

Related Media

Related Publications

Fluid-flow induced flutter of a flag M. Argentina and L. Mahadevan,  Proceedings of the National Academy of Sciences (USA), 102, 1829-34, 2005. [View PDF] [Download PDF]