AI 中文总结
研究生物流体动力学中能动纤毛协调运动及流体运输能力，开发丝状振荡器模型计算模型纤毛的涌现协调与推进，分析不同参数下的双稳态、推进能力及流场，探讨摆动平面倾斜对纤毛旋转的影响。
AI 中文摘要
生物流体动力学研究中的一个长期挑战是对能动纤毛的协调运动及其促进流体运输能力的机理理解。在本研究中，我们开发了数值技术来同时计算覆盖球体表面的丝状模型纤毛的涌现协调和推进。为此，我们开发了丝状振荡器模型，其中每个纤毛有两个动态自由度。通过改变与纤毛刚度相关的参数，我们表明在辛样和非辛错列波之间存在双稳态。我们还分析了两种涌现状态的推进能力和流场，以及引入摆动平面倾斜如何导致纤毛旋转。
英文摘要
A longstanding challenge in biofluid dynamics research is a mechanistic understanding of the coordinated movement of motile cilia and its resulting ability to facilitate fluid transport. In this study, we develop numerical techniques to simultaneously compute the emergent coordination of and propulsion by filamentous model cilia covering the surface of a sphere. To accomplish this, we develop what we refer to as the filament oscillator model, in which each cilium has two dynamic degrees of freedom: a phase variable that maps to a specific shape in a prescribed sequence, and an angle that describes the overall orientation of the sequence. By varying a parameter related to cilium stiffness, we show that there is bistability between symplectic-like and diaplectic metachronal waves, provided that the stiffness is sufficiently low. Above the critical stiffness, only diaplectic waves emerge. Further, we analyse the propulsive capabilities and flow fields of the two emergent states, showing that diaplectic waves provide more efficient propulsion due to their shorter wavelengths. In addition, we examine how introducing beat-plane tilt leads to ciliate rotation while maintaining nearly identical emergent states and comparable swimming speeds.
Comments54 pages, 23 figures
