Volume 107, Number 3, August 2014
|Number of page(s)||6|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||01 August 2014|
Stripe formation in horizontally oscillating granular suspensions
1 Department of Physics, Institute for Advanced Studies in Basic Sciences (IASBS) - Zanjan 45137-66731, Iran
2 Department of Theoretical Physics, Saarland University - D-66041 Saarbruecken, Germany
3 CINVESTAV-Monterrey, PIIT - Apodaca, Nuevo Leon, 66600, Mexico
4 PMMH, ESPCI, UMR CNRS 7636 and Université Paris 6 et Paris 7 - F-75005 Paris, France
Received: 30 April 2014
Accepted: 10 July 2014
We present the results of an experimental study of pattern formation in horizontally oscillating granular suspensions. Starting from a homogeneous state, the suspension turns into a striped pattern within a specific range of frequencies and amplitudes of oscillation. We observe an initial development of layered structures perpendicular to the vibration direction and a gradual coarsening of the stripes. However, both processes gradually slow down and eventually saturate. The probability distribution of the stripe width P(w) approaches a nonmonotonic steady-state form which can be approximated by a Poisson distribution. We observe similar structures in MD simulations of soft spherical particles coupled to the motion of the surrounding fluid.
PACS: 45.70.Qj – Pattern formation / 45.70.Mg – Granular flow: mixing, segregation and stratification / 47.54.-r – Pattern selection; pattern formation
© EPLA, 2014
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