Experimental measurement of an effective temperature for jammed granular materials

by: Chaoming Song, Ping Wang, Hernan A Makse

Proceedings of the National Academy of Sciences, Vol. 102, No. 7. (15 February 2005), pp. 2299-2304.

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Abstract

A densely packed granular system is an example of an out-of-equilibrium system in the jammed state. It has been a longstanding problem to determine whether this class of systems can be described by concepts arising from equilibrium statistical mechanics, such as an effective temperature and compactivity. The measurement of the effective temperature is realized in the laboratory by slowly shearing a closely packed ensemble of spherical beads confined by an external pressure in a Couette geometry. All of the probe particles considered in this study, independent of their characteristic features, equilibrate at the same temperature, given by the packing density of the system. 10.1073/pnas.0409911102

@article{citeulike:2731415, abstract = {A densely packed granular system is an example of an out-of-equilibrium system in the jammed state. It has been a longstanding problem to determine whether this class of systems can be described by concepts arising from equilibrium statistical mechanics, such as an effective temperature and compactivity. The measurement of the effective temperature is realized in the laboratory by slowly shearing a closely packed ensemble of spherical beads confined by an external pressure in a Couette geometry. All of the probe particles considered in this study, independent of their characteristic features, equilibrate at the same temperature, given by the packing density of the system. 10.1073/pnas.0409911102}, author = {Song, Chaoming and Wang, Ping and Makse, Hernan A. }, citeulike-article-id = {2731415}, doi = {10.1073/pnas.0409911102}, journal = {Proceedings of the National Academy of Sciences}, keywords = {grains, jamming, makse, temperature}, month = {February}, number = {7}, pages = {2299--2304}, posted-at = {2008-04-29 01:39:52}, priority = {2}, title = {Experimental measurement of an effective temperature for jammed granular materials}, url = {http://dx.doi.org/10.1073/pnas.0409911102}, volume = {102}, year = {2005} }

RIS record

TY - JOUR ID - citeulike:2731415 L3 - citeulike-article-id:2731415 TI - Experimental measurement of an effective temperature for jammed granular materials JF - Proceedings of the National Academy of Sciences VL - 102 IS - 7 SP - 2299 EP - 2304 N2 - A densely packed granular system is an example of an out-of-equilibrium system in the jammed state. It has been a longstanding problem to determine whether this class of systems can be described by concepts arising from equilibrium statistical mechanics, such as an effective temperature and compactivity. The measurement of the effective temperature is realized in the laboratory by slowly shearing a closely packed ensemble of spherical beads confined by an external pressure in a Couette geometry. All of the probe particles considered in this study, independent of their characteristic features, equilibrate at the same temperature, given by the packing density of the system. 10.1073/pnas.0409911102 KW - grains KW - jamming KW - makse KW - temperature AU - Song, Chaoming AU - Wang, Ping AU - Makse, Hernan PY - 2005/02/15/ UR - http://dx.doi.org/10.1073/pnas.0409911102 ER -

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