Bacteria are approximately several micrometers in size and swim in water by rotating their flagella, which are motile organs on the surface of their bodies, and interacting with the surrounding fluid. In particular, it is known that bacteria swim in circular trajectories near walls due to fluid dynamic interactions between the bacteria and the walls. In this study, we focused on magnetically controllable magnetic bacteria and aimed to analyze their swimming behavior near walls in detail using numerical simulation. Magnetic bacteria contain magnetic particles inside their bodies and have the property of swimming in the direction of an external magnetic field. However, the swimming behavior of magnetic bacteria near walls has not yet been fully elucidated. The results obtained in this study are expected to not only deepen our understanding of the movement mechanism of magnetic bacteria but also provide new insights into the design and control of micromachines. Specifically, numerical simulations were used to analyze the swimming behavior of magnetic bacteria near walls when the magnetic field around them was changed, and the effects of the magnetic field and wall on the movement of magnetic bacteria were quantitatively evaluated.
KAWASAKI et al. (Wed,) studied this question.