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Barchan dunes in two dimensions: Experimental tests for minimal models

URN to cite this document: urn:nbn:de:bvb:703-epub-3972-0

Title data

Groh, Christopher ; Wierschem, Andreas ; Aksel, Nuri ; Rehberg, Ingo ; Krülle, Christof A.:
Barchan dunes in two dimensions: Experimental tests for minimal models.
In: Physical Review E. Vol. 78 (2008) Issue 2 . - Art.Nr. 021304.
ISSN 1550-2376
DOI der Verlagsversion: https://doi.org/10.1103/PhysRevE.78.021304

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Abstract

A well-defined two-dimensional single barchan dune under the force of a shearing water flow is investigated experimentally. From an initially prepared triangular heap a rapid relaxation to a steady-state solution is observed with constant mass, shape, and velocity. This attractor exhibits all characteristic features of barchan dunes found in nature, namely a gently inclined windward side, crest, brink, and steep lee face. The relaxation time towards the steady state increases with mass. For small dunes we find significant deviations from a fixed height-length aspect ratio. As predicted by recent theoretical models, the migration velocity scales reciprocal to the length of the dune.

Further data

Item Type: Article in a journal
Keywords: Granular systems
DDC Subjects: 500 Science > 530 Physics
600 Technology, medicine, applied sciences > 620 Engineering
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics V
Faculties > Faculty of Engineering Science > Chair Technical Mechanics and Fluid Mechanics
Faculties > Faculty of Engineering Science > Former Professors > Chair Technical Mechanics and Fluid Mechanics - Univ.-Prof. Dr. Nuri Aksel
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Former Professors
Language: English
Originates at UBT: Yes
URN: urn:nbn:de:bvb:703-epub-3972-0
Date Deposited: 25 Jan 2019 11:22
Last Modified: 03 Jul 2020 10:43
URI: https://epub.uni-bayreuth.de/id/eprint/3972
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