Ageing of a granular pile induced by thermal cycling

Details Ageing of a granular pile induced by thermal cycling Ageing of a granular pile induced by thermal cycling

2009-06-02

arxiv.org/abs/0906.0452v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 5 figures, Proceeding of the Powders and Grains conference 2009, Golden (Colorado)

Scientific paper

Here we show that variations of temperature, even of a few degrees in amplitude, induce the ageing of a granular pile. In particular, we report measurements of physical properties of a granular heap submitted to thermal cycles. Namely, we focus on the evolution of the thermal linear-expansion coefficient and of the thermal conductivity of the pile with the number of cycles. The present contribution nicely supplements a recent article we published elsewhere [Phys. Rev. Lett. \textbf{101}, 148303 (2008)] and introduces a different and promising method to impose temperature cycles to a granular pile.

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