皂膜上液滴的轨道运动、碰撞与合并：迈向引力类比
Orbiting, colliding and merging droplets on a soap film: toward gravitational analogues
AI总结：
本文研究皂膜上液滴在重力-毛细力驱动下的轨道运动、碰撞与合并现象，发现其形成的桥状结构和旋臂类似天体结构，并通过实验与模型对比揭示了稳定液滴的普适半径和吸引势机制，为引力类比研究开辟新方向。
摘要：
现代望远镜提供了由复杂天体之间引力驱动相互作用所塑造的星云、云团和星系的惊人图像。虽然此类结构在天体物理尺度上普遍存在，但在人类尺度上却很少被观测到。在这篇快报中，我们报告了皂膜上液滴的复杂轨道运动、碰撞和合并的观测结果，它们形成了诸如桥状结构和旋臂等结构，令人联想到其天体物理对应物。这些动力学源于支撑皂膜由重力-毛细驱动畸变所产生的吸引力。长轨道运动和复杂的合并机制分别得益于皂膜中的低耗散以及液滴和支撑膜的流体性质。通过将实验数据与计算支撑皂膜畸变的模型进行仔细比较，解释了皂膜中具有普适半径的稳定液滴的存在以及吸引势。这项工作为……开辟了前景。
英文摘要：
Modern telescopes provide breathtaking images of nebulae, clouds and galaxies shaped by gravity-driven interactions between complex bodies. While such structures are prevalent on an astrophysical scale, they are rarely observed at the human scale. In this letter, we report the observations of the complex orbits, collision, and coalescence of droplets on a soap film, forming structures such as bridges and spiral arms, reminiscent of their astrophysical counterparts. These dynamics emerge from attractive forces caused by gravito-capillary-driven distortions of the supporting soap film. Long orbits and intricate coalescence mechanisms are enabled by the small dissipation in the soap film and the fluidic nature of the droplets and supporting film, respectively. The existence of stable droplets within the soap film featuring a universal radius, as well as the attractive potentials, are explained through a careful comparison of experimental data with models computing the distortions of the supporting soap film. This work opens perspectives to
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