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Gewählte Publikation:

Yucesan, S; Wildt, D; Gmeiner, P; Schobesberger, J; Hauer, C; Sindelar, C; Habersack, H; Tritthart, M.
(2021): Interaction of Very Large Scale Motion of Coherent Structures with Sediment Particle Exposure
WATER-SUI. 2021; 13(3), 248 FullText FullText_BOKU

Abstract:
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.
Autor*innen der BOKU Wien:
Gmeiner Philipp
Habersack Helmut
Hauer Christoph
Schobesberger Johannes
Sindelar Christine
Tritthart Michael
Wildt Daniel
Yücesan Sencer
BOKU Gendermonitor:


Find related publications in this database (Keywords)
coherent structures
hairpin-vortex packets
hydrodynamic forces
particle entrainment
very-large-scale motions
turbulent channel flow


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