abstract

• 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 density-fluctuations 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. © 2022 Author(s).

authors

• Lira-Escobedo J.
• Ramírez González Pedro Ezequiel
• Vélez Cordero Juan Rodrigo

publication date

• 2022-01-01

funding provided via

• CB-2015-01-257636; Consejo Nacional de Ciencia y Tecnología, CONACYT  Grant

published in

• Physics of Fluids  Journal

keywords

• Cooling; Differential equations; Glass forming machines; Cooling process; Cooling rates; Density fluctuation; Dynamical heterogeneities; Generalized Langevin equation theories; Glass-forming liquid; Non equilibrium; Slow cooling; Spatial heterogeneity; Theoretical framework; Liquids

Digital Object Identifier (DOI)

• 10.1063/5.0078932

PubMed ID

start page

end page

volume

• 34

issue

• 1