The other entropy

Frenkel, Daan, Asenjo, Daniel and Paillusson, Fabien (2013) The other entropy. Molecular Physics, 111 (22-23). pp. 3641-3650. ISSN 0026-8976

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The other entropy

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Granular materials are not in thermodynamic equilibrium. Nevertheless, concepts borrowed from equilibrium statistical mechanics are extensively used to characterise granular systems. One often-invoked concept is the so-called granular entropy. In this paper, we consider what it would take to compute granular entropy numerically. Our focus is the analogy (or, more accurately, lack thereof) between statistical mechanical ensembles, as used in Monte Carlo simulations of thermal systems, and preparation protocols used in the generation of granular packings. Attempts to phrase the description of granular media in ‘thermal’ Monte Carlo language reveal some awkward problems. Whilst some of these problems had been reported in the existing literature, the present perspective yields new insights.

Additional Information:Special issue in honour of Giovanni Ciccotti on the occasion of his 70th birthday
Keywords:Granular Matter, Powders, Statistical Mechanics
Subjects:F Physical Sciences > F200 Materials Science
F Physical Sciences > F340 Mathematical & Theoretical Physics
Divisions:College of Science > School of Mathematics and Physics
ID Code:17979
Deposited On:11 Sep 2015 10:59

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