Anisotropic stress correlations in two-dimensional liquids
- Univ. of Tennessee, Knoxville, TN (United States). Joint Inst. of Neutron Science and Dept. of Physics and Astronomy
- Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering
- Univ. of Tennessee, Knoxville, TN (United States). Joint Inst. of Neutron Science and Dept. of Physics and Astronomy; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
In this paper we demonstrate the presence of anisotropic stress correlations in the simulated 2D liquids. Whereas the temporal correlation of macroscopic shear stress is known to contribute to viscosity via the Green-Kubo formula, the general question regarding angular dependence of the spatial correlation among atomic level stresses in liquids without external shear has not been explored. Besides the apparent anisotropicity with well-defined symmetry, we found that the characteristic length of shear stress correlation depends on temperature and follows the power law, suggesting divergence around the glass transition temperature. The anisotropy of the stress correlations can be explained in terms of the inclusion model by Eshelby, based upon which we suggest that the mismatch between the atom and its nearest neighbor cage produces the atomic level stress as well as the long-range stress fields.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1185850
- Alternate ID(s):
- OSTI ID: 1180869
- Journal Information:
- Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics, Vol. 91, Issue 3; ISSN 1539-3755
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Anomalous phonon scattering and elastic correlations in amorphous solids
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journal | August 2016 |
Tensorial analysis of Eshelby stresses in 3D supercooled liquids
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journal | October 2015 |
Spatial-decomposition analysis of viscosity with application to Lennard-Jones fluid
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journal | March 2018 |
Stress correlations in glasses
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journal | September 2018 |
Inherent stress correlations in a quiescent two-dimensional liquid: Static analysis including finite-size effects
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journal | November 2017 |
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