Metastable, Sub-Triple Liquids: Thermodynamics and Phase Transition Dynamics

亚稳态、亚三重液体：热力学和相变动力学

• 批准号: 8517739
• 负责人: Pablo Debenedetti
• 金额: $ 0.4万
• 依托单位: Princeton University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1986
• 资助国家: 美国
• 起止时间: 1986-03-01 至 1987-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8517739&HistoricalAwards=false
• 关键词: Metastable; Sub; Triple; Liquids; Thermodynamics

This project is a theoretical study of metastable liquids at temperatures and pressures which are simultaneously lower than the triple point temperature and pressure (sub-triple liquids): a stable liquid cannot exist below the triple temperature. The proposed work consists of a computer simulation study of a unique and previously unexplored rapid phase transition whereby a sub-triple liquid relaxes to form an equilibrium vapour-solid mixture. The thermodynamics and stability limits of sub-triple liquids are important to the understanding of fluid transport in plants, where liquids are frequently under tension and below their freezing point. The phenomenon of loss of tensile strength at low temperatures (tensile instability) has very important consequences in the general area of cavitation, and in any application where liquids close to their freezing point are subject to tensile stresses (impeller blades, ship propellers).

该项目是一个亚稳液体的理论研究， 温度和压力，同时低于 三相点温度和压力（子三重液体）：稳定 液体不能在三倍温度以下存在。 拟议工作 包括一个计算机模拟研究的独特和以前的 未探索的快速相变，其中亚三重液体松弛 以形成平衡的气-固混合物。 热力学和 亚三重液体的稳定性极限对于 了解植物中的液体运输，其中液体是 经常处于张力和冰点以下。 的 在低温下拉伸强度损失的现象（拉伸 不稳定）在一般领域具有非常重要的后果， 空化，以及在任何应用中，其中液体接近其 凝固点受到拉应力（叶轮叶片，船舶 螺旋桨）。