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ROLLING MOTION OF PARTICLES OVER TRANSITIONALLY-ROUGH BED
The rolling motion of sediment particles and the near bed (wall region) turbulence of a transitionally-rough bed surface are studied experimentally using an acoustic Doppler velocimeter and a real time high speed imaging system. Path traced by the sediment particles and the corresponding velocity components were obtained from the high speed images captured using digital image processing technique. Sediments of different sizes were tested. The near bed turbulence characteristics were quantified by measuring the instantaneous velocity components and then retrieving the time averaged velocity components, turbulence intensity components and turbulence stresses. The competence of the two dimensionless parameters provided by Sekine and Kikkawa (1992) for saltation is tested with the results obtained on the rolling motion of the sediment particles over transitionally-rough beds.
ROLLING MOTION OF PARTICLES OVER TRANSITIONALLY-ROUGH BED
The rolling motion of sediment particles and the near bed (wall region) turbulence of a transitionally-rough bed surface are studied experimentally using an acoustic Doppler velocimeter and a real time high speed imaging system. Path traced by the sediment particles and the corresponding velocity components were obtained from the high speed images captured using digital image processing technique. Sediments of different sizes were tested. The near bed turbulence characteristics were quantified by measuring the instantaneous velocity components and then retrieving the time averaged velocity components, turbulence intensity components and turbulence stresses. The competence of the two dimensionless parameters provided by Sekine and Kikkawa (1992) for saltation is tested with the results obtained on the rolling motion of the sediment particles over transitionally-rough beds.
ROLLING MOTION OF PARTICLES OVER TRANSITIONALLY-ROUGH BED
Ramesh, B. (author) / Kothyari, U. C. (author) / Murugesan, K. (author)
ISH Journal of Hydraulic Engineering ; 17 ; 23-31
2011-01-01
9 pages
Article (Journal)
Electronic Resource
Unknown
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