Dynamics of swimming and falling bodies in inviscid flows

Research Horizons Seminar
Wednesday, October 26, 2011 - 12:05
1 hour (actually 50 minutes)
Skiles 005
School of Mathematics, Georgia Tech
Vortex methods are an efficient and versatile way to simulate high Reynolds number flows. We have developed vortex sheet methods for a variety of flows past deforming bodies, many of which are biologically inspired. In this talk we will present simulations and asymptotic analysis of selected problems. The first is a study of oscillated and freely-swimming flexible foils. We analyze the damped resonances that determine propulsive performance. The second problem involves multiple passive flapping ``flags" which interact through their vortex wakes. The third problem is a study of flexible falling sheets. Here the flag-flapping instability helps us determine the terminal falling speeds.