微涡度涨落影响流体薄膜的结构
Micro-vorticity fluctuations affect the structure of thin fluid films
摘要：
复杂流体界面的动态相互作用对发生在数十纳米尺度上的近接触相互作用高度敏感。这种相互作用是难以分析的，因为它们耦合自洽的动态形态的不断发展的接口，以及流体力学的间隙流体膜。在这项工作中，我们表明，在给定的幅度阈值以上，近接触的相互作用触发非平凡的微涡模式，这反过来又影响有效的近接触的相互作用，引起持续波动的涟漪在流体界面。在这样的制度，近接触的相互作用可能会显着影响宏观排列的乳液配置，如软流动的微流体晶体中出现的。
英文摘要：
The dynamic interaction of complex fluid interfaces is highly sensitive to near-contact interactions occurring at the scale of ten of nanometers. Such interactions are difficult to analyse because they couple self-consistently to the dynamic morphology of the evolving interface, as well as to the hydrodynamics of the interstitial fluid film. In this work, we show that, above a given magnitude threshold, near-contact interactions trigger non-trivial micro-vorticity patterns, which in turn affect the effective near-contact interactions, giving rise to persistent fluctuating ripples at the fluid interface. In such regime, near-contact interactions may significantly affect the macroscopic arrangement of emulsion configurations, such as those arising in soft-flowing microfluidic crystals.
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