Investigation of flow patterns induced by the collective motion of micro-organisms


Dense suspensions of micro-organisms have been observed experimentally to display coordinated motion over length scales significantly larger than that of an individual cell. The emergence of such coherent structures is thought to be governed by the cell volume fraction as well as the details of the swimming mechanisms of the micro-organisms.


This project investigates flow structures emerging at the onset of collective motion of microorganisms. You will take advantage of a unique tomographic PIV experimental set up recently developed in the laboratory for Aero- and Hydrodynamic (Kim H. et al. 2011). This set up will allow you to visualize and investigate the 3D coherent flow structures created by the collective dynamics of micro-organisms and to characterize the enhancement of mixing and transport in the suspension.


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