Dynamics of spatially modulated kinks in shallow granular layers

Macías, J. E.; Falcon, C

Abstract

We report on the experimental observation and characterization of the bifurcation diagram, dynamical properties and fluctuations of spatially modulated kinks in a shallow one-dimensional fluidized granular layer subjected to a periodic air flow. We show the appearance of these solutions as the layer undergoes a parametric instability. Due to the inherent fluctuations of the granular layer, the kink profile exhibits an effective wavelength, termed the precursor, which modulates spatially the homogeneous states and drastically modifies the kink dynamics. We characterize the average and fluctuating properties of this solution. The long-term evolution of these kinks is dominated by a hopping dynamics, related directly to the underlying spatial structure and inherent fluctuation. The properties of this motion can be described by a Brownian particle in a symmetric periodic potential. Both the noise intensity of the Brownian fluctuations and the amplitude

Más información

Título según WOS: Dynamics of spatially modulated kinks in shallow granular layers
Título según SCOPUS: Dynamics of spatially modulated kinks in shallow granular layers
Título de la Revista: NEW JOURNAL OF PHYSICS
Volumen: 16
Editorial: IOP PUBLISHING LTD
Fecha de publicación: 2014
Idioma: English
URL: http://stacks.iop.org/1367-2630/16/i=4/a=043032?key=crossref.0563825dc4262239a713e878308c1800
DOI:

10.1088/1367-2630/16/4/043032

Notas: ISI, SCOPUS