Interface Instabilities, Rupture, and Dynamics

小行星9306791 该项目将利用液氦的超高纯度、有据可查的特性和良好的声学特性，利用新颖的实验研究来研究一系列界面现象。 其他当代动态课题，如超扩散，噪声和介观电子系统中的本地化，将与声学模拟研究。 研究的界面现象包括流体界面、油膜破裂、空化、射流破碎等。 这些现象在科学上是有趣的，因为它们涉及亚稳平衡系统通过流体动力学不稳定性、非线性动力学或分子水平上的动力学接近真正平衡的基本效应。 该项目使用超纯液氦作为声学介质，以研究与许多实际问题有关的许多流体界面问题，包括泡沫产生，乳液，喷雾混合，空化，润滑，超声应用，如医学等。 该项目还涉及半导体、金属和其他材料中电子现象的新声学模型。 声学测量可以以其他技术无法实现的方式揭示量子现象。 ***

9306791 Maynard This project will study a range of interface phenomena using novel experimental research which takes adantage of the ultra-high purity, well documented properties, and favorable acoustic characteristics of liquid helium. Other contemporary topics in dynamics, such as superdiffusion, noise and localization in mesoscopic electronic systems, will be studied with acoustic analogs. The interfacial pehnomena to be investigated include fluid interfaces, film rupture, cavitation, fluid jet breakup. These phenomena are scientifically interesting because they involve the fundamental effects of systems in metastable equilibrium approaching true equilibrium through hydrodynamic instabilities, nonlinear dynamics or dynamics on a molecular level. %%% This project uses ultrapure liquid helium as an acoustic medium to investigate a number of fluid interface problems that bear on many practical problems, including foam production, emulsions, spraying mixing, cavitation, lubrication, ultrasound applications, as in medicine, and others. The project also involves novel acoustical models of electronic phenomena occuring in semiconductors, metals and other materials. The acoustic measurements can shed light on the quantum phenomena in a way not possible using other techniques. ***