Kawakami Sho, Vlahovska Petia M
Department of Engineering Sciences and Applied Mathematics, Northwestern University, Evanston, IL, USA.
Philos Trans A Math Phys Eng Sci. 2025 Sep 11;383(2304):20240254. doi: 10.1098/rsta.2024.0254.
Bacterial motility is strongly influenced by confinement. Here, we derive an asymptotic solution for the flow about a microswimmer enclosed in a weakly deformable Hele-Shaw drop-a drop sandwiched between two solid planes. For a microswimmer modelled as a dipole, we explore the swimmer's trajectory, the evolution of the droplet interface and the drop velocity. The results show that at steady state, the dipole induces droplet translation with a velocity independent of the dipole location and in the same direction as the dipole orientation. The trajectory of the swimming dipole is significantly affected by droplet deformability.This article is part of the theme issue 'Biological fluid dynamics: emerging directions'.
细菌的运动性受到限制的强烈影响。在此，我们推导了围绕包裹在弱可变形Hele-Shaw液滴（夹在两个固体平面之间的液滴）中的微型游泳体的流动的渐近解。对于建模为偶极子的微型游泳体，我们研究了游泳体的轨迹、液滴界面的演化以及液滴速度。结果表明，在稳态下，偶极子会使液滴以与偶极子位置无关且与偶极子取向相同方向的速度平移。游泳偶极子的轨迹受到液滴可变形性的显著影响。本文是主题为“生物流体动力学：新兴方向”的一部分。
