Stability of a Dumbbell Micro-Swimmer
AbstractA squirmer model achieves propulsion by generating surface squirming velocities. This model has been used to analyze the movement of micro-swimmers, such as microorganisms and Janus particles. Although squirmer motion has been widely investigated, motions of two connected squirmers, i.e., a dumbbell squirmer, remain to be clarified. The stable assembly of multiple micro-swimmers could be a key technology for future micromachine applications. Therefore, in this study, we investigated the swimming behavior and stability of a dumbbell squirmer. We first examined far-field stability through linear stability analysis, and found that stable forward swimming could not be achieved by a dumbbell squirmer in the far field without the addition of external torque. We then investigated the swimming speed of a dumbbell squirmer connected by a short rigid rod using a boundary element method. Finally, we investigated the swimming stability of a dumbbell squirmer connected by a spring. Our results demonstrated that stable side-by-side swimming can be achieved by pullers. When the aft squirmer was a strong pusher, fore and aft swimming were stable and swimming speed increased significantly. The findings of this study will be useful for the future design of assembled micro-swimmers. View Full-Text
Share & Cite This Article
Ishikawa, T. Stability of a Dumbbell Micro-Swimmer. Micromachines 2019, 10, 33.
Ishikawa T. Stability of a Dumbbell Micro-Swimmer. Micromachines. 2019; 10(1):33.Chicago/Turabian Style
Ishikawa, Takuji. 2019. "Stability of a Dumbbell Micro-Swimmer." Micromachines 10, no. 1: 33.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.