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Observation of Density Segregation Inside Migrating Dunes

Title data

Groh, Christopher ; Rehberg, Ingo ; Kruelle, Christof A.:
Observation of Density Segregation Inside Migrating Dunes.
American Physical Society
In: Physical Review E. Vol. 84 (November 2011) Issue 5 . - 050301. - 4 S..
ISSN 1550-2376
DOI: https://doi.org/10.1103/PhysRevE.84.050301

Official URL: Volltext

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Abstract in another language

Spatiotemporal patterns in nature, such as ripples or dunes, formed by a fluid streaming over a sandy surface show complex behavior despite their simple forms. Below the surface, the granular structure of the sand particles is subject to self-organization processes, exhibiting such phenomena as reverse grading when larger particles are found on top of smaller ones. Here we report results of an experimental investigation with downscaled model dunes revealing that, if the particles differ not in size but in density, the heavier particles, surprisingly, accumulate in the central core close to the top of the dune. This finding contributes to the understanding of sedimentary structures found in nature and might be helpful to improve existing dating methods for desert dunes.

Further data

Item Type: Article in a journal
Refereed: Yes
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: 09 Aug 2018 07:51
Last Modified: 24 Jan 2019 11:13
URI: https://eref.uni-bayreuth.de/id/eprint/42927