微型游动体的水弹性散射与捕获
Hydroelastic scattering and trapping of microswimmers
AI总结：
本文利用微扰理论研究 pusher 和 puller 在可变形边界附近的水弹性耦合游动，发现 pusher 既能发生水弹性散射也能被边界捕获，揭示了可变形边界与平面壁附近行为显著不同的机制。
摘要：
可变形边界在游动微生物的栖息环境中无处不在，导致复杂的水弹性耦合。我们采用适用于小变形的微扰理论，研究了 pusher 和 puller 在具有弯曲刚度和表面张力的瞬时变形边界附近的游动动力学。我们的结果表明，pusher 既可以重新取向远离边界，从而产生整体的水弹性散射，也可以被边界捕获，类似于在 puller 中发现的增强捕获现象。这些发现表明，复杂的水弹性相互作用能够产生与在平面壁附近游动截然不同的行为。
英文摘要：
Deformable boundaries are omnipresent in the habitats of swimming microorganisms, leading to intricate hydroelastic couplings. Employing a perturbation theory, valid for small deformations, we study the swimming dynamics of pushers and pullers near instantaneously deforming boundaries, endowed with a bending rigidity and surface tension. Our results reveal that pushers can both reorient away from the boundary, leading to overall hydroelastic scattering, or become trapped by the boundary, akin to the enhanced trapping found for pullers. These findings demonstrate that the complex hydroelastic interactions can generate behaviors that are in striking contrast to swimming near planar walls.
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