The Adam-Gibbs relation and the TIP4P/2005 model of water.

The Adam-Gibbs relation and the TIP4P/2005 model of water.
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DOI:
10.1080/00268976.2018.1471230
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发表时间:
2018
期刊:
影响因子:
1.7
通讯作者:
Sciortino F
Sciortino F
中科院分区:
化学4区
文献类型:
--
作者:
Handle PH;Sciortino F

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我们报告了TIP 4P/2005水模型的亚当-吉布斯关系的数值试验。在这里,构型熵被评估为在平衡条件下采样的势能景观中的不同盆地的数量的对数。尽管非单调的行为,其中的密度依赖性的扩散系数,亚当-吉布斯关系是满意的数值精度在很宽的范围内的密度和温度。我们还表明,表达式的基础上的过剩熵(相空间中的采样微观状态的数量的对数)失败的四面体氢键网络发展的密度区域。
We report a numerical test of the Adam–Gibbs relation for the TIP4P/2005 model of water. The configurational entropy is here evaluated as the logarithm of the number of different basins in the potential energy landscape sampled in equilibrium conditions. Despite the non-monotonic behaviour which characterise the density dependence of the diffusion coefficient, the Adam–Gibbs relation is satisfied within the numerical precision in a wide range of densities and temperatures. We also show that expressions based on the excess entropy (the logarithm of the number of sampled microstates in phase space) fail in the region of densities where a tetrahedral hydrogen bond network develops.
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