scholarly journals Multiple length and time scales of dynamic heterogeneities in model glass-forming liquids: A systematic analysis of multi-point and multi-time correlations

2013 ◽  
Vol 138 (12) ◽  
pp. 12A506 ◽  
Author(s):  
Kang Kim ◽  
Shinji Saito
Keyword(s):  
Time Scales ◽  
Systematic Analysis ◽  
Glass Forming ◽  
Model Glass ◽  
Time Correlations

scholarly journals Dynamical time scales of friction dynamics in active microrheology of a model glass

Soft Matter ◽  
2021 ◽  
Author(s):  
Ata Madanchi ◽  
Ji Woong Yu ◽  
Mohamad Reza Rahimi Tabar ◽  
Won Bo Lee ◽  
S. E. E. Rahbari
Keyword(s):  
Time Scales ◽  
Supercooled Liquids ◽  
Model Glass ◽  
Heterogeneous Structures ◽  
Dynamical Time ◽  
Friction Dynamics

Owing to the local/heterogeneous structures in supercooled liquids, after several decades of research, it is now clear that supercooled liquids are structurally different from their conventional liquid counterparts. Accordingly, an...

scholarly journals Nuclear disassembly time scales using space-time correlations

1995 ◽  
Vol 345 (4) ◽  
pp. 397-402 ◽  
Author(s):  
D. Durand ◽  
J. Colin ◽  
J.F. Lecolley ◽  
C. Meslin ◽  
M. Aboufirassi ◽  
...  
Keyword(s):  
Time Scales ◽  
Space Time ◽  
Time Correlations ◽  
Disassembly Time

scholarly journals Energy Renormalization for Coarse-Graining the Dynamics of a Model Glass-Forming Liquid

2018 ◽  
Vol 122 (6) ◽  
pp. 2040-2045 ◽  
Author(s):  
Wenjie Xia ◽  
Jake Song ◽  
Nitin K. Hansoge ◽  
Frederick R. Phelan ◽  
Sinan Keten ◽  
...  
Keyword(s):  
Coarse Graining ◽  
Glass Forming ◽  
Model Glass ◽  
Energy Renormalization

The Importance of Transient Nucleation and Non-Equilibrium Viscosity for Glass Formation

1985 ◽  
Vol 57 ◽  
Author(s):  
Kenneth F. Kelton
Keyword(s):  
Steady State ◽  
Metallic Glasses ◽  
Glass Formation ◽  
Volume Fraction ◽  
Molecular Cluster ◽  
Transient Effects ◽  
Glass Forming ◽  
Model Glass ◽  
Transient Nucleation ◽  
Non Equilibrium

AbstractThe process of nucleation and growth in glasses and undercooled liquids is modeled by directly simulating the evolution of the molecular cluster distribution under both isothermal and non-isothermal conditions. Results of that simulation for the nucleation rate during the quench, and for the number of nuclei produced and the volume fraction transformed at the end of the quench are presented. The following three points are discussed: (1) The importance of transient, or non-steady state, nucleation rates on glass formation is assessed by considering three model glass forming systems: lithium disilicate, a relatively good glass former, and two metallic glasses, (Au85Cu15)77Si9Gd14 and Au81Si19. (2) Using experimentally determined values for the steady state nucleation rates and growth velocities for Pd40Ni40P20, it is demonstrated that, in agreement with recent experimental results, this alloy may be cycled at rates on the order of 1 K/sec between the melting and glass transition temperatures without crystallization. Transient effects are shown to be unimportant under these conditions in this system. (3) The effect on glass formation of a non-equilibrium viscosity during the quench due to configurational freezing is evaluated by assuming a phenomenological model for the changing viscosity.

scholarly journals Lagrangian Velocity Correlations and Absolute Dispersion in the Midlatitude Troposphere

2005 ◽  
Vol 62 (10) ◽  
pp. 3831-3836 ◽  
Author(s):  
Jai Sukhatme
Keyword(s):  
Time Scales ◽  
Rossby Waves ◽  
Zonal Flow ◽  
Velocity Correlation ◽  
Planetary Scale ◽  
Time Correlations ◽  
Lagrangian Velocity ◽  
Long Time ◽  
Intermediate Time ◽  
Velocity Correlation Functions

Abstract Employing daily wind data from the ECMWF, passive particle advection is performed to estimate the Lagrangian velocity correlation functions (LVCF) associated with the midlatitude tropospheric flow. In particular, the velocity field is decomposed into time mean and transient (or eddy) components to better understand the nature of the LVCFs. A closely related quantity, the absolute dispersion (AD), is also examined. Given the anisotropy of the flow, meridional and zonal characteristics are considered separately. The zonal LVCF is seen to be nonexponential. In fact, for intermediate time scales it can either be interpreted as a power law of the form τ−α with 0 < α < 1 or as the sum of exponentials with differing time scales—both interpretations being equivalent. More importantly the long time correlations in the zonal flow result in a superdiffusive zonal AD regime. On the other hand, the meridional LVCF decays rapidly to zero. Before approaching zero the meridional LVCF shows a region of negative correlation—a consequence of the presence of planetary-scale Rossby waves. As a result the meridional AD, apart from showing the classical asymptotic ballistic and diffusive regimes, displays transient subdiffusive behavior.

scholarly journals Evolution of collective motion in a model glass-forming liquid during physical aging

2013 ◽  
Vol 138 (12) ◽  
pp. 12A528 ◽  
Author(s):  
Amit Shavit ◽  
Jack F. Douglas ◽  
Robert A. Riggleman
Keyword(s):  
Physical Aging ◽  
Collective Motion ◽  
Glass Forming ◽  
Model Glass

Influence of Backbone Rigidity on Nanoscale Confinement Effects in Model Glass-Forming Polymers

2013 ◽  
Vol 46 (12) ◽  
pp. 5044-5052 ◽  
Author(s):  
Amit Shavit ◽  
Robert A. Riggleman
Keyword(s):  
Confinement Effects ◽  
Glass Forming ◽  
Model Glass
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