Skip navigation

Zastosuj identyfikator do podlinkowania lub zacytowania tej pozycji: http://hdl.handle.net/20.500.12128/623
Tytuł: Scaling of viscous dynamics in simple liquids : Theory, simulation and experiment
Autor: Bohling, Lasse
Ingebrigtsen, Trond S.
Grzybowski, Andrzej
Paluch, Marian
Dyre, Jeppe C.
Schrøder, Thomas B.
Słowa kluczowe: Decahydroisoquinoline; Density Change; Density Scaling; Simple Liquids; Supercooled Liquids
Data wydania: 2012
Źródło: New Journal of Physics, (2012), November, art. no. 113035
Abstrakt: Supercooled liquids are characterized by relaxation times that increase dramatically by cooling or compression. From a single assumption follows a scaling law according to which the relaxation time is a function of h(ρ) over temperature, where ρ is the density and the function h(ρ) depends on the liquid in question. This scaling is demonstrated to work well for simulations of the Kob-Andersen binary Lennard-Jones mixture and two molecular models, as well as for the experimental results for two van der Waals liquids, dibutyl phthalate and decahydroisoquinoline. The often used power-law density scaling, h(ρ)∝ργ, is an approximation to the more general form of scaling discussed here. A thermodynamic derivation was previously given for an explicit expression for h(ρ) for liquids of particles interacting via the generalized Lennard-Jones potential. Here a statistical mechanics derivation is given, and the prediction is shown to agree very well with simulations over large density changes. Our findings effectively reduce the problem of understanding the viscous slowing down from being a quest for a function of two variables to a search for a single-variable function.
URI: http://hdl.handle.net/20.500.12128/623
DOI: 10.1088/1367-2630/14/11/113035
ISSN: 1367-2630
Pojawia się w kolekcji:Artykuły (WMFiCH)

Pliki tej pozycji:
Plik Opis RozmiarFormat 
Bohling_Scaling_of_viscous_dynamics_in_simple_liquids.pdf838,73 kBAdobe PDFPrzejrzyj / Otwórz
Pokaż pełny rekord


Uznanie autorstwa - użycie niekomercyjne, na tych samych warunkach 3.0 Polska Creative Commons Creative Commons