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On Ripples - A Boundary Layer-Theoretical Definition

Zanke, Ulrich ; Roland, Aron (2022)
On Ripples - A Boundary Layer-Theoretical Definition.
In: Water, 2022, 13 (7)
doi: 10.26083/tuprints-00019537
Article, Secondary publication, Publisher's Version

Copyright Information: CC BY 4.0 International - Creative Commons, Attribution.

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Item Type: Article
Type of entry: Secondary publication
Title: On Ripples - A Boundary Layer-Theoretical Definition
Language: English
Date: 2 February 2022
Place of Publication: Darmstadt
Year of primary publication: 2022
Publisher: MDPI
Journal or Publication Title: Water
Volume of the journal: 13
Issue Number: 7
Collation: 19 Seiten
DOI: 10.26083/tuprints-00019537
Corresponding Links:
Origin: Secondary publication DeepGreen

Once the first initial ripples have developed, they form according to the actual flow forces and sediment properties. In this paper, a semianalytical approach to determine the length of the developed ripples is presented. The theory assumes initial disturbances at the bed surface and corresponding flow separations resulting from an individual respective boundary layer. What causes the initial rhythmic perturbations is not the subject of this paper. Based on boundary layer theory, this approach explains a possible physical background for the existence and length of developed ripples in cohesion-free sediments. At the same time, the approach provides a distinction from dunes: ripples are sand waves affected by a viscous sublayer, and dunes are sand waves where this is not the case. Applications to Earth, Mars, and Titan are shown.

Uncontrolled Keywords: sediment transport, ripples, dunes, bed forms, Mars, Titan
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-195378
Classification DDC: 600 Technology, medicine, applied sciences > 620 Engineering and machine engineering
Divisions: 13 Department of Civil and Environmental Engineering Sciences > Institute of Hydraulic and Water Resources Engineering
Date Deposited: 02 Feb 2022 13:24
Last Modified: 14 Nov 2023 19:04
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/19537
PPN: 505614871
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