Interaction of Very Large Scale Motion of Coherent Structures with Sediment Particle Exposure
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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.
1979 ◽
Vol 105
(446)
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pp. 849-858
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1972 ◽
Vol 53
(01)
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pp. 61
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2013 ◽
Vol 5
(04)
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pp. 477-493
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