Hauptseminar Active Matter SS 2015/Life at Low Reynolds Numbers: Nature`s Strategy for Motion at Small Length Scales (T)

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Date
22.04.2015
Topic
Life at Low Reynolds Numbers: Nature`s Strategy for Motion at Small Length Scales (T)
Speaker
Karoline Weinspach
Tutor
Georg Rempfer

Contents

In this topic the concept of self-propulsion in biological systems is discussed. In particular the consequences of living in an incompressible/viscous medium on the micron length scale. The concept of irreversibility will be introduced via Purcell's famous scallop theorem. The various mechanisms by which micro-organisms achieve motion are considered in connection to irreversibility. In relation to their strategies to achieve self-propulsion, the far-field hydrodynamic signature of these objects is discussed and the consequences these hydrodynamic modes have for their interaction with walls and other particles.

Literature

  • E.M. Purcell, Am. J. Phys. 45, 3 (1977)
  • A. Najafi and R. Golestanian, J. Phys.: Condens. Matter 19, S1203 (2005)
  • O.S. Pak and Eric Lauga, arXiv:1410.4321v1 (2014)
  • D.O. Pushkin, H. Shum, and J.M. Yeomans, J. Fluid Mech. 726, 5 (2013)