Fuentevilla D A, Anisimov M A
Department of Chemical & Biomolecular Engineering and Institute for Physical Science & Technology, University of Maryland, College Park, MD 20742, USA.
Phys Rev Lett. 2006 Nov 10;97(19):195702. doi: 10.1103/PhysRevLett.97.195702. Epub 2006 Nov 7.
We have developed a scaled parametric equation of state to describe and predict thermodynamic properties of supercooled water. The equation of state, built on the growing evidence that the critical point of supercooled liquid-liquid water separation exists, is universal in terms of theoretical scaling fields and is shown to belong to the Ising-model class of universality. The theoretical scaling fields are postulated to be analytical combinations of the physical fields, pressure, and temperature. The equation of state enables us to accurately locate the "Widom line" (the locus of stability minima) and determine that the critical pressure is considerably lower than predicted by computer simulations.
我们已经开发出一种标度参数状态方程，用于描述和预测过冷水的热力学性质。基于越来越多的证据表明过冷液 - 液水分离的临界点存在，该状态方程在理论标度场方面具有通用性，并被证明属于伊辛模型类的普适性。理论标度场被假定为物理场、压力和温度的解析组合。该状态方程使我们能够精确地定位“维德曼线”（稳定性最小值的轨迹），并确定临界压力远低于计算机模拟预测的值。
