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Article

Interaction of Very Large Scale Motion of Coherent Structures with Sediment Particle Exposure

1
Christian Doppler Laboratory for Sediment Research and Management, Muthgasse 107, 1180 Vienna, Austria
2
Institute of Hydraulic Engineering and River Research (IWA), University of Natural Resources and Life Sciences, Muthgasse 107, 1180 Vienna, Austria
*
Author to whom correspondence should be addressed.
Water 2021, 13(3), 248; https://doi.org/10.3390/w13030248
Received: 28 November 2020 / Revised: 14 January 2021 / Accepted: 16 January 2021 / Published: 20 January 2021
A systematic variation of the exposure level of a spherical particle in an array of multiple spheres in a high Reynolds number turbulent open-channel flow regime was investigated while using the Large Eddy Simulation method. Our numerical study analysed hydrodynamic conditions of a sediment particle based on three different channel configurations, from full exposure to zero exposure level. Premultiplied spectrum analysis revealed that the effect of very-large-scale motion of coherent structures on the lift force on a fully exposed particle resulted in a bi-modal distribution with a weak low wave number and a local maximum of a high wave number. Lower exposure levels were found to exhibit a uni-modal distribution. View Full-Text
Keywords: coherent structures; hairpin-vortex packets; hydrodynamic forces; particle entrainment; very-large-scale motions; turbulent channel flow coherent structures; hairpin-vortex packets; hydrodynamic forces; particle entrainment; very-large-scale motions; turbulent channel flow
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MDPI and ACS Style

Yücesan, S.; Wildt, D.; Gmeiner, P.; Schobesberger, J.; Hauer, C.; Sindelar, C.; Habersack, H.; Tritthart, M. Interaction of Very Large Scale Motion of Coherent Structures with Sediment Particle Exposure. Water 2021, 13, 248. https://doi.org/10.3390/w13030248

AMA Style

Yücesan S, Wildt D, Gmeiner P, Schobesberger J, Hauer C, Sindelar C, Habersack H, Tritthart M. Interaction of Very Large Scale Motion of Coherent Structures with Sediment Particle Exposure. Water. 2021; 13(3):248. https://doi.org/10.3390/w13030248

Chicago/Turabian Style

Yücesan, Sencer, Daniel Wildt, Philipp Gmeiner, Johannes Schobesberger, Christoph Hauer, Christine Sindelar, Helmut Habersack, and Michael Tritthart. 2021. "Interaction of Very Large Scale Motion of Coherent Structures with Sediment Particle Exposure" Water 13, no. 3: 248. https://doi.org/10.3390/w13030248

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