Patterns in a Two-Dimensional Annular Granular Layer

doi:10.1088/0256-307X/30/4/044501

Chin. Phys. Lett.

2013, Vol. 30

Issue (4): 044501 DOI: 10.1088/0256-307X/30/4/044501

FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS)

Patterns in a Two-Dimensional Annular Granular Layer

CAI Hui, CHEN Wei-Zhong, MIAO Guo-Qing^**

Institute of Acoustics and Key Laboratory of Modern Acoustics of Ministry of Education, Nanjing University, Nanjing 210093

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CAI Hui, CHEN Wei-Zhong, MIAO Guo-Qing 2013 Chin. Phys. Lett. 30 044501

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Abstract Patterns such as periodic subharmonic waves and kink-pairs are observed experimentally in a two-dimensional vertically vibrated granular layer located in an annular channel which has a sawtooth-shaped base. Using the thickness of the granular layer and external excitation as control parameters, we find the transitions between different patterns in the layer. The dependence of the kink-pair's velocity on the external excitation is revealed. The local velocity fields of the granular layer indicate that, in addition to horizontal transport in the layer, there is convection in the node area of a kink.

Received: 04 November 2012 Published: 28 April 2013

PACS:	45.70.Qj	(Pattern formation)
	45.70.Mg	(Granular flow: mixing, segregation and stratification)
	05.65.+b	(Self-organized systems)

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