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Reversing the Brazil-Nut Effect : Competition between Percolation and Condensation

Title data

Breu, Andreas P. J. ; Ensner, Hans-Martin ; Kruelle, Christof A. ; Rehberg, Ingo:
Reversing the Brazil-Nut Effect : Competition between Percolation and Condensation.
In: Physical Review Letters. Vol. 90 (January 2003) Issue 1 . - No. 014302.
ISSN 1079-7114
DOI: https://doi.org/10.1103/PhysRevLett.90.014302

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Abstract in another language

We report on experiments on vertically shaken binary granular mixtures, which separate into their components due to the external excitation. This well-known phenomenon, where large particles rise to the top of the mixture, is called the Brazil-nut effect. Recent theoretical findings predict also a reverse Brazil-nut effect, where large particles sink to the bottom of the container. We choose spherical beads of various diameters and materials in order to observe the transition from Brazil-nut effect to its reverse form. The direction of demixing depends sensitively on the external excitation, so that it is possible to switch between both effects for a given mass density ratio.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Granular flow: mixing, segregation and stratification; Self-organized systems; Pattern formation
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
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 04 Oct 2018 11:42
Last Modified: 22 Feb 2019 09:59
URI: https://eref.uni-bayreuth.de/id/eprint/42984