University of Birmingham > Talks@bham > Applied Mathematics Seminar Series > Enhancement of microorganism swimming speed in active matter

Enhancement of microorganism swimming speed in active matter

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  • UserThomas Powers, Brown University
  • ClockFriday 11 January 2019, 11:00-12:00
  • HouseWatson LTB.

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We study a swimming undulating sheet in the isotropic phase of an active nematic liquid crystal. Activity changes the effective shear viscosity, reducing it to zero at a critical value of activity. Expanding in the sheet amplitude, we find that the correction to the swimming speed due to activity is inversely proportional to the effective shear viscosity. Our perturbative calculation becomes invalid near the critical value of activity; using numerical methods to probe this regime, we find that activity enhances the swimming speed by an order of magnitude compared to the passive case.

This talk is part of the Applied Mathematics Seminar Series series.

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