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Observation of Density Segregation Inside Migrating Dunes

URN to cite this document: urn:nbn:de:bvb:703-epub-3949-6

Title data

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

Format:	PDF
Name:	PhysRevE.84.050301.pdf
Version:	Published Version
Available under License	German copyright law. The document may be used free of charge for personal use. In addition, the reproduction, editing, distribution and any kind of exploitation require the written consent of the respective rights holder.

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Abstract

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
Keywords:	Granular systems.
DDC Subjects:	500 Science > 530 Physics
Institutions of the University:	Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Former Professors > 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 Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Former Professors
Language:	English
Originates at UBT:	Yes
URN:	urn:nbn:de:bvb:703-epub-3949-6
Date Deposited:	24 Jan 2019 10:29
Last Modified:	30 Jun 2020 10:44
URI:	https://epub.uni-bayreuth.de/id/eprint/3949

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