Regensburg 2019 – scientific programme

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BP: Fachverband Biologische Physik

BP 19: Focus session: Physics of cilia: Dynamics of synchronized oscillators

BP 19.6: Talk

Wednesday, April 3, 2019, 16:30–16:45, H11

Actuation of artificial cilia with surface acoustic waves — •Gerhard Lindner, Alexander Backer und Klaus Stefan Drese — Institut für Sensor- und Aktortechnik, Hochschule Coburg, 96450 Coburg, Germany

Surface acoustic waves such as Rayleigh or Lamb waves generate displacements at the surface with larger amplitudes than in the bulk volume. By them a periodic movement of cilia, whose tracing point is fastened at the surface, can be actuated. In case of an asymmetric bending stiffness of such cilia it is possible to excite a directional streaming in a fluid, which enables a pumping of this fluid. In particular, this allows an advantageous modification of the streaming profile in the boundary layer neighboring a solid wall. Corresponding estimations will be presented in this contribution. The concept is matter of the European patent EP 2545369 ``Apparatus producing and/or detecting a flow in a medium'' granted on May 30, 2018.