Reduced Transport of Swimming Particles in Chaotic Flow due to Hydrodynamic Trapping

Nidhi Khurana, Jerzy Blawzdziewicz, Nicholas T. Ouellette
2011 Physical Review Letters  
We computationally study the transport of active, self-propelled particles suspended in a twodimensional chaotic flow. The point-like, spherical particles have their own intrinsic swimming velocity, which modifies the dynamical system so that the particles can break the transport barriers present in the carrier flow. Surprisingly, we find that swimming does not necessarily lead to enhanced particle transport. Small but finite swimming speed can result in reduced transport, as swimmers get stuck
more » ... swimmers get stuck for long times in traps that form near elliptic islands in the background flow. Our results have implications for models of transport and encounter rates for small marine organisms.
doi:10.1103/physrevlett.106.198104 pmid:21668206 fatcat:frauiugqgrepnasqog652uwaay