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Direct simulations of bacterial suspensions

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  • UserSebastien Martin (University of Orsay)
  • ClockThursday 19 April 2012, 15:00-16:00
  • HouseMR14, CMS.

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We present two-dimensional simulations of self-propelled bacteria swimming in a viscous fluid. Self-propulsion is modelled by a couple of forces of same intensity and opposite direction applied on the rigid bacterial body and on an associated region in the fluid representing the flagellar bundle. The method for solving the fluid flow and the motion of the bacteria is based on a variational formulation written on the whole domain, strongly coupling the fluid and the rigid particle problems: rigid motion is enforced by penalizing the strain rate tensor on the rigid domain, while incompressibility is treated by duality. This model allows to achieve an accurate description of fluid motion and hydrodynamic interactions in moderate to concentrated active suspensions.

This talk is part of the Applied and Computational Analysis series.

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