首页|Ultra-slow and arrested density-fluctuations as precursor of spatial heterogeneity

Ultra-slow and arrested density-fluctuations as precursor of spatial heterogeneity

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Dynamical heterogeneities in glass-forming liquids subjected to cooling processes are studied by a theoretical framework based on the non-equilibrium self-consistent generalized Langevin equation theory. This theory predicts that slow cooling rates permit the relaxation to the equilibrium state distinguished by a homogeneous local density. In contrast, fast cooling rates provoke dynamically arrested densityfluctuations and the establishment of permanent spatial heterogeneities even in the presence of density gradients. We further show that the dynamics toward the arrested state has two steps: a truncated relaxation followed by a second relaxation of the diluted part of the system.

liquidscoolingstudied

J. Lira-Escobedo、J. R. Vélez-Cordero、Pedro E. Ramírez-González

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Instituto de Física "Manuel Sandoval Vallarta," Universidad Autónoma de San Luis Potosí, álvaro Obregón 64, 78000 San Luis Potosí, Mexico

Investigadores CONACYT-Instituto de Física "Manuel Sandoval Vallarta," Universidad Autónoma de San Luis Potosí, álvaro Obregón 64, 78000 San Luis Potosí, Mexico

2022

10.1063/5.0078932

Physics of fluids

Physics of fluids

EISCI
ISSN：1070-6631
年,卷(期)：2022.34(1 Pt.1)
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