Reentrant behavior of relaxation time with viscosity at varying composition in binary mixtures.
Reentrant behavior of relaxation time with viscosity at varying composition in binary mixtures.
复制标题
二元混合物中不同成分下弛豫时间随粘度的重入行为。
DOI：
10.1103/physrevlett.86.5926
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发表时间：
2000
影响因子：
8.6
通讯作者：
B. Bagchi
中科院分区：
文献类型：
--
作者：
A. Mukherjee;G. Srinivas;B. Bagchi
为了了解长期以来已知的异常的二元混合物的扩散和粘度的组成依赖性，我们在这里引入两个新的模型，并进行了广泛的分子动力学模拟。在这些模型中，两种分子种类（A和B）具有相同的直径和质量。在模型I中，物种间的相互作用比纯组分之间的相互作用更有吸引力，而模型II则相反。模拟和模式耦合理论计算表明，该模型可以捕捉各种各样的行为在实验中观察到的，包括重入粘度依赖的弛豫时间。
In order to understand the long known anomalies in the composition dependence of diffusion and viscosity of binary mixtures, we introduce here two new models and carry out extensive molecular dynamics simulations. In these models, the two molecular species (A and B) have the same diameter and mass. In model I the interspecies interaction is more attractive than that between the pure components, while the reverse is true for model II. Simulations and mode coupling theory calculations reveal that the models can capture a wide variety of behavior observed in experiments, including the reentrant viscosity dependence of relaxation time.