Low-Reynolds-number, biflagellated Quincke swimmers with multiple forms of motion.

TitleLow-Reynolds-number, biflagellated Quincke swimmers with multiple forms of motion.
Publication TypeJournal Article
Year of Publication2021
AuthorsHan, E, Zhu, L, Shaevitz, JW, Stone, HA
JournalProc Natl Acad Sci U S A
Volume118
Issue29
Date Published2021 07 20
ISSN1091-6490
Abstract

In the limit of zero Reynolds number (Re), swimmers propel themselves exploiting a series of nonreciprocal body motions. For an artificial swimmer, a proper selection of the power source is required to drive its motion, in cooperation with its geometric and mechanical properties. Although various external fields (magnetic, acoustic, optical, etc.) have been introduced, electric fields are rarely utilized to actuate such swimmers experimentally in unbounded space. Here we use uniform and static electric fields to demonstrate locomotion of a biflagellated sphere at low Re via Quincke rotation. These Quincke swimmers exhibit three different forms of motion, including a self-oscillatory state due to elastohydrodynamic-electrohydrodynamic interactions. Each form of motion follows a distinct trajectory in space. Our experiments and numerical results demonstrate a method to generate, and potentially control, the locomotion of artificial flagellated swimmers.

DOI10.1073/pnas.2022000118
Alternate JournalProc Natl Acad Sci U S A
PubMed ID34266946
PubMed Central IDPMC8307774