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- W2897156771 abstract "Recently there have been several considerations by different authors of viscosity and the Green-Kubo stress correlation function from the microscopic perspective. In most of these and earlier works the atomic level stress is the minimal element of stress. It is also possible to consider, for pairwise interaction potentials, as the minimal elements of stress, the stress tensors associated with the pairs of interacting particles. From this perspective, the atomic level stress is not the minimal stress element, but a sum of all pair stress elements in which involved a selected particle. In this paper, we consider the Green-Kubo stress correlation function from a microscopic perspective using the stress tensors of interacting pairs as the basic stress elements. The obtained results show the presence of a long-range bond-orientational order in the studied model liquid and naturally elucidate the connection of the bond-orientational order with viscosity. It turns out that the long-range bond-orientational order is more clearly expressed in the pairs' stress correlation function than in the atomic stress correlation function. On the other hand, previously observed stress waves are much better expressed in the atomic stress correlation functions. We also address the close connection of our approach with the previous bond-orientational order considerations. Finally, we consider the probability distributions for the bond-stress and atomic stress correlation products at selected distances. The character of the obtained probability distributions raises questions about the meaning of the average correlation functions at large distances." @default.
- W2897156771 created "2018-10-26" @default.
- W2897156771 creator A5062717673 @default.
- W2897156771 date "2018-10-12" @default.
- W2897156771 modified "2023-09-23" @default.
- W2897156771 title "Green-Kubo stress correlation function at the atomic scale and a long-range bond-orientational ordering in a model liquid" @default.
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- W2897156771 doi "https://doi.org/10.1103/physreve.98.042904" @default.
- W2897156771 hasPublicationYear "2018" @default.
- W2897156771 type Work @default.
- W2897156771 sameAs 2897156771 @default.