Emergent behavior across scales: locomotion, mixing, and collective motion in active swimmers
Wednesday, June 16 at 05:45pm (PDT)Thursday, June 17 at 01:45am (BST)Thursday, June 17 09:45am (KST)
Robert Guy (University of California Davis, United States), Arvind Gopinath (University of California Merced, United States)
This minisymposium focuses on emergent and novel multi-scale behavior in active swimmer systems. The first part of the minisymposium focuses on the locomotion of single swimmers. Many living micro-organisms move by coordinated movements of flagella. While some artificial microswimmers mimic these movements, alternative designs that leverage instabilities of the ambient media are possible. Synchronous flagellar beats result from the coupling between flagella elasticity, ambient fluid properties and internal motor driven activity. Synthetic swimmers may similarly be realized by coupling external driving forces to body elasticity and fluid rheology. Research is presented on how fluid rheology enables flagellar beats, novel swimming strategies that exploit symmetry breaking, and methods for studying swimmers. The second part of the mini-symposium features talks on the collective behavior of microswimmers and associated mixing flows. Mixing fluids at small scales is challenging given the lack of inertia, yet mixing is needed in many microfluidic settings. Research is presented on sorting (unmixing) in bacterial suspensions, mixing flows originating from microorganism interactions or instabilities in complex fluids, and on chemical reactions related to the emergence of life in microfluidic experiments.