舞蹈团藻：游动藻类的水动力束缚态
Dancing Volvox: Hydrodynamic Bound States of Swimming Algae
摘要：
团藻是一种球形的藻类，它依靠数千个表面体细胞上的鞭毛游动。这种几何形状和它的大尺寸使它成为研究多细胞流体动力学的模型生物。值得注意的是，当两个附近的团藻游近固体表面时，它们相互吸引，并能形成稳定的束缚状态，在这种状态下，它们彼此“华尔兹”或“小步舞曲”。一个表面介导的流体动力学吸引力与旋转，底部重团藻之间的润滑力相结合，解释了束缚态的形成，稳定性和动力学。这些现象被认为是团藻在表面聚集的基础。
英文摘要：
The spherical alga Volvox swims by means of flagella on thousands of surface somatic cells. This geometry and its large size make it a model organism for studying the fluid dynamics of multicellularity. Remarkably, when two nearby Volvox swim close to a solid surface, they attract one another and can form stable bound states in which they "waltz" or "minuet" around each other. A surface-mediated hydrodynamic attraction combined with lubrication forces between spinning, bottom-heavy Volvox explains the formation, stability and dynamics of the bound states. These phenomena are suggested to underlie observed clustering of Volvox at surfaces.
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