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Percolation in supercritical water: Do the Widom and percolation lines coincide?

机译:超临界水的渗透:是否符合WIDOM和渗滤线?

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Hydrogen bonding distinguishes water from simpler fluids. Here, we use classical molecular dynamics to study the percolation transition in the hydrogen bond network of supercritical water. We find that, contrary to some previous work, the percolation line in both the pressure-temperature and density-temperature planes does not coincide with the Widom line. This difference stems from a fundamental distinction between the Widom line, which is thermodynamic in nature, and the percolation transition, which depends only on connectivity. For example, we show that percolation-related quantities collapse onto master curves when plotted with respect to a measure of connectivity rather than thermodynamic variables. We then use the Galam-Mauger formula to understand the properties of the hydrogen bonding network. We find that the percolation transition in supercritical water can shed light on the hydrogen bonding network in room temperature liquid water. Published by AIP Publishing.
机译:氢键与更简单的流体区分水。 在这里,我们使用经典的分子动力学来研究超临界水的氢键网络中的渗透过渡。 我们发现,与某些先前的工作相反,压力温度和密度温度平面中的渗透线与金箔线不一致。 这种差异源于金黄管线之间的基本区别,其在自然中热力学以及渗透过渡,这仅取决于连通性。 例如,我们表明,当绘制相对于连通性的量度而不是热力学变量的衡量标准时,渗滤有关的数量折叠到主曲线上。 然后,我们使用Galam-Mauger公式来了解氢键网络的性质。 我们发现超临界水中的渗透过渡可以在室温液体水中的氢键网络上脱光。 通过AIP发布发布。

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