Publication
Title
Proposed lower bound for the shear viscosity to entropy density ratio in some dense liquids
Author
Abstract
 Starting from relativistic quantum field theories, Kovtun et al. (2005) have quite recently proposed a lower bound ç/s/(4ðkB), where ç is the shear viscosity and s the volume density of entropy for dense liquids. If their proposal can eventually be proved, then this would provide key theoretical underpinning to earlier semiempirical proposals on the relation between a transport coefficient ç and a thermodynamic quantity s. Here, we examine largely experimental data on some dense liquids, the insulators nitrogen, water, and ammonia, plus the alkali metals, where the shear viscosity ç(T) for the four heaviest alkalis is known to scale onto an almost universal curve, following the work of Tankeshwar and March a decade ago. So far, all known results for both insulating and metallic dense liquids correctly exceed the lower bound prediction of Kovtun et al.
Language
English
Source (journal)
Physics letters: A. - Amsterdam, 1967, currens
Publication
Amsterdam : 2009
ISSN
0375-9601
Volume/pages
373:10(2009), p. 992-998
ISI
000264424200018
Full text (Publisher's DOI)
UAntwerpen
 Faculty/Department Research group Publication type Subject Affiliation Publications with a UAntwerp address