Helical Propulsion in a Viscous Heterogeneous Medium

Anke Klingner, Dalia Mahdy, Mostafa Hanafi, Barbara Adel, S. Misra, Islam S. M. Khalil

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Abstract

We characterize the propulsion of externallyactuated helical robots inside a viscous heterogenous medium. The method of regularized Stokeslets is implemented in threedimensional space for computing the Stokes flow around a helical robot and immersed obstacles (spherical microparticles) in the medium. The helical robot is actuated using a permanent magnet-based robotic system with two synchronized rotating dipole fields. Our simulations and experimental results demonstrate propulsion enhancement with the concentration of the immersed obstacles in the viscous medium regardless of the actuation frequency. Numerical results show that the swimming speed is increased approximately by a factor of 2 for a 5% increase in the concentration of immersed obstacles with diameter of 30 μm, at actuation frequency of 1 Hz. At this actuation frequency, our experimental results show that the swimming speed is increased by a factor of 1.4. At relatively high actuation frequency (8 Hz), simulation and experimental results also show increase in the swimming speed by factors of 1.4 and 1.3, respectively.
Original languageEnglish
Title of host publicationThe Annual International Conference on Manipulation, Automation and Robotics at Small Scales
Place of PublicationToronto
PublisherIEEE
Number of pages6
Publication statusPublished - 31 Jul 2020
Event5th Annual International Conference on Manipulation, Automation and Robotics at Small Scales, MARSS 2021 - Toronto, Canada
Duration: 19 Jul 202123 Jul 2021
Conference number: 5

Conference

Conference5th Annual International Conference on Manipulation, Automation and Robotics at Small Scales, MARSS 2021
Abbreviated titleMARSS 2021
CountryCanada
CityToronto
Period19/07/2123/07/21

Keywords

  • microrobotics
  • magnetic
  • propulsion

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