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Dynamics of artificial helical microswimmers under confinement

Çaldağ, Hakan Osman and Yeşilyurt, Serhat (2018) Dynamics of artificial helical microswimmers under confinement. In: 16th International Conference on Nanochannels, Microchannels and Minichannels (ICNMM2018), Dubrovnik, Croatia

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Abstract

Understanding trajectories of natural and artificial helical swimmers under confinement is important in biology and for controlled swimming in potential medical applications. Swimmers follow helical or straight trajectories depending on whether the helical tail is pushing or pulling the swimmer. To investigate swimming dynamics of helical swimmers further, we present a Computational Fluid Dynamics (CFD) model for simulation of an artificial microswimmer in cylindrical channels. The microswimmer has a cylindrical head and a lefthanded helical tail. The kinematic model solves for the position and rotation of the swimmer based on the linear and angular velocities of the force-free swimmer from a CFD model. Thirdorder Adams-Bashforth solver is used to obtain the orientation and the position of the swimmer. Viscous, gravitational, magnetic and contact forces and torques are considered in the model. The model is validated with experimental results. 3D trajectories, propulsion and tangential velocities are reported.

Item Type:Papers in Conference Proceedings
Uncontrolled Keywords:Microswimmers, low Reynolds number flows
Subjects:UNSPECIFIED
ID Code:34896
Deposited By:Serhat Yeşilyurt
Deposited On:14 Aug 2018 14:23
Last Modified:14 Aug 2018 14:23

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