Unexpected thermo-elastic effects in liquid glycerol by mechanical deformation

被引:11
作者
Kume, Eni [1 ]
Zaccone, Alessio [2 ,3 ,4 ]
Noirez, Laurence [1 ]
机构
[1] Univ Paris Saclay, CNRS, CEA, Lab Leon Brillouin, F-91191 Gif Sur Yvette, France
[2] Univ Milan, Dept Phys A Pontremoli, I-20133 Milan, Italy
[3] Univ Cambridge, Dept Chem Engn & Biotechnol, Philippa Fawcett Dr, Cambridge CB3 0AS, England
[4] Univ Cambridge, Cavendish Lab, JJ Thomson Ave, Cambridge CB3 0HE, England
基金
欧盟地平线“2020”;
关键词
RELAXATION;
D O I
10.1063/5.0051587
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
It is commonly accepted that shear waves do not propagate in a liquid medium. The shear wave energy is supposed to dissipate nearly instantaneously. This statement originates from the difficulty to access "static" shear stress in macroscopic liquids. In this paper, we take a different approach. We focus on the stability of the thermal equilibrium while the liquid (glycerol) is submitted to a sudden shear strain at sub-millimeter scale. The thermal response of the deformed liquid is unveiled. The liquid exhibits simultaneous and opposite bands up to about +0.04 to -0.04 degrees C temperature variation, while keeping the global thermal balance unchanged. The sudden thermal changes and the long thermal relaxation highlight the ability of the liquid to convert the step strain energy in non-uniform thermodynamic states. The thermal effects depend nearly linearly on the amplitude of the deformation supporting the hypothesis of a shear wave propagation (elastic correlations) extending up to several hundreds micrometers. This new physical effect can be explained in terms of the underlying phonon physics of confined liquids, which unveils a hidden solid-like response with many similarities to glassy systems. (C) 2021 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
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页数:6
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