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

本项目是对温度和压力同时低于三相点温度和压力的亚稳态液体（亚三相液体）的理论研究：低于三相点温度和压力是不可能存在稳定液体的。提出的工作包括计算机模拟研究一种独特的和以前未开发的快速相变，其中亚三重液体松弛形成平衡气固混合物。亚三重液体的热力学和稳定性极限对于理解植物中的流体输送非常重要，因为植物中的液体经常处于张力和冰点以下。低温下抗拉强度损失的现象（抗拉不稳定性）在空化的一般领域以及在接近其冰点的液体受到拉伸应力的任何应用（叶轮叶片，船舶螺旋桨）中具有非常重要的后果。

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).