报告摘要:

    The mechanism by which aggregates of active swimmers are formed is an intriguing problem. In this talk I will show that, for two tandem self-propelled filaments driven by harmonic plunging motions of identical frequency and amplitude, stable configurations can be spontaneously formed by locking the trajectories onto the vortex centers. Further analysis indicates that the grouping energetics is also dictated by the wake vortex structure. The rationale behind the energetic advantage of the follower is found to be the interplay among actuation, self-propulsion, and the vortical fluid environment.

 

报告人简介:

     Dr. Xing Zhang obtained his Ph.D in Mechanical Engineering from UMASS Amherst in 2002. He is currently an Associate Professor at the Institute of Mechanics, Chinese Academy of Sciences. Before joining CAS, he has worked in IHPC (Singapore) and IAPCM (Beijing, China). His main research area is numerical methods in computational fluid dynamics (CFD). He also works in turbulence simulation, parallel Computing and bio-fluid mechanics.