Relaxation Phenomena in Liquids and Glasses and Pattern Formation in Fluids

液体和玻璃中的弛豫现象以及流体中的图案形成

• 批准号: 9410478
• 负责人: Sidney Nagel
• 金额: $ 27万
• 依托单位: University of Chicago
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-07-15 至 1997-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9410478&HistoricalAwards=false
• 关键词: Relaxation; Phenomena; Liquids; Glasses; Pattern

9410478 Nagel Technical abstract: The relaxations in supercooled liquids will be investigated by means of different spectroscopic techniques including specific heat and dielectric spectroscopies, shear modulus and quadrupole susceptibility. The dielectric spectroscopy will be conducted over 14 decades in frequency. The nature of the singularity in the interface that occurs when a singlr drop of liquid splits into two or more separate sections will be probed using photographic techniques. The observations will be modeled with detailed numerical simulations of the Navier-Stokes equations. In addition, simulations of patterns (temporal as well as spatial) that occur in a variety of geophysical contexts will be simulated. Non-technical abstract: An investigation will be carried out by which glasses are formed by the cooling of a liquid. Many different spectroscopies will be used and compared to each other. Another investigation is concerned with how a single drop of liquid splits into two or more components. This study will be done using photographic techniques coupled with detailed numerical simulations. Finally, a study will be continued in which simulations are carried out of patterns that occur in a variety of geophysical contexts such as earthquakes and river formation. ***

技术摘要：将采用不同的光谱技术，包括比热和介电光谱、剪切模量和四极磁化率来研究过冷液体中的弛豫。介电光谱的频率将超过14年。当一滴液体分裂成两个或多个独立的部分时，界面中的奇点的性质将使用摄影技术进行探测。观测结果将用Navier-Stokes方程的详细数值模拟来模拟。此外，还将模拟各种地球物理环境中出现的模式（时间和空间）。非技术摘要：将进行一项研究，通过液体冷却形成玻璃。许多不同的光谱将被使用并相互比较。另一项研究是关于一滴液体如何分裂成两个或更多的成分。这项研究将使用摄影技术结合详细的数值模拟来完成。最后，将继续进行一项研究，对地震和河流形成等各种地球物理背景下发生的模式进行模拟。＊＊＊