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Role of defects in the onset of wall-induced granular convection

DOI zum Zitieren dieses Dokuments: https://doi.org/10.1103/PhysRevE.91.032206
URN to cite this document: urn:nbn:de:bvb:703-epub-3931-3

Title data

Fortini, Andrea ; Huang, Kai:
Role of defects in the onset of wall-induced granular convection.
In: Physical Review E. Vol. 91 (March 2015) Issue 3 . - Art.Nr. 032206.
ISSN 1550-2376
DOI: https://doi.org/10.1103/PhysRevE.91.032206

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Abstract

We investigate the onset of wall-induced convection in vertically vibrated granular matter by means of experiments and two-dimensional computer simulations. In both simulations and experiments we find that the wall-induced convection occurs inside the bouncing bed region of the parameter space, in which the granular bed behaves like a bouncing ball. A good agreement between experiments and simulations is found for the peak vibration acceleration at which convection starts. By comparing the results of simulations initialized with and without defects, we find that the onset of convection occurs at lower vibration strengths in the presence of defects. Furthermore, we find that the convection of granular particles initialized in a perfect hexagonal lattice is related to the nucleation of defects and the process is described by an Arrhenius law.

Further data

Item Type: Article in a journal
Keywords: Granular systems; Theories and models of crystal defects; Buoyancy-driven flows, convection.
DDC Subjects: 500 Science > 530 Physics
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics V > Chair Experimental Physics V - Univ.-Prof. Dr. Ingo Rehberg
Profile Fields > Advanced Fields > Nonlinear Dynamics
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics V
Profile Fields
Profile Fields > Advanced Fields
Language: English
Originates at UBT: Yes
URN: urn:nbn:de:bvb:703-epub-3931-3
Date Deposited: 21 Jan 2019 13:26
Last Modified: 21 Jan 2019 13:26
URI: https://epub.uni-bayreuth.de/id/eprint/3931

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