Influence of gravity on a granular Maxwell's demon experiment

Isert, Nathan; Maaß, Corinna C.; Aegerter, Christof M.

Influence of gravity on a granular Maxwell's demon experiment

Files

2009_Isert_Influence_of_gravity.pdf(1.77 MB)

Date

2009

Authors

Isert, Nathan

Maaß, Corinna C.

Aegerter, Christof M.

Publication type

Journal article

Published in

European Physical Journal / E ; 28 (2009), 2. - pp. 205-210

Abstract

In the usual description of the granular Maxwell s demon experiment, where phase separation occurs due to an instability in the densities, the control parameter scales linearly with gravity. In this paper we investigate this scaling experimentally using the properties of diamagnetic particles in strong magnetic-field gradients to reduce and even balance gravitation. We find that phase separation occurs even at vanishingly small gravitational accelerations as is predicted by other theories. This is due to the fact that granular samples tend to form clusters as a result of the inelasticity of the particle collisions. Combining the heat balance of the driven granular gas with the cooling rate and thus the appearance of clustering, we are able to describe the crossover between the limiting cases.

Subject (DDC)

530 Physics

Cite This

ISO 690

ISERT, Nathan, Corinna C. MAASS, Christof M. AEGERTER, 2009. Influence of gravity on a granular Maxwell's demon experiment. In: European Physical Journal / E. 28(2), pp. 205-210. Available under: doi: 10.1140/epje/i2008-10403-7

BibTex

@article{Isert2009Influ-9168,
  year={2009},
  doi={10.1140/epje/i2008-10403-7},
  title={Influence of gravity on a granular Maxwell's demon experiment},
  number={2},
  volume={28},
  journal={European Physical Journal / E},
  pages={205--210},
  author={Isert, Nathan and Maaß, Corinna C. and Aegerter, Christof M.}
}

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