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Turbulence study over submerged obstacles on waves and currents combined flow
The paper explores an experimental study carried out in a laboratory flume to investigate the interaction of surface wave and unidirectional current over a pair of hemispherical obstacles with relative spacing, L/d = 4 where L is center to center spacing and d is the obstacle height. The effect of surface waves and current interaction on the mean velocity profile, turbulence intensities and Reynolds shear stress of an open channel flow under the influence of two hemispherical obstacles has been presented in this paper. The components of velocity along three different directions were measured using 3D micro-acoustic Doppler velocimeter. The experiments were conducted for Reynolds number 58800. Quadrant analysis has been adopted to investigate the turbulence bursting events contributing to the Reynolds shear stress in the near-bed region. It is observed that closed to the top of the obstacles, the contribution to the total shear stress due to ejection and sweeping events changes with the superposition of waves.
Turbulence study over submerged obstacles on waves and currents combined flow
The paper explores an experimental study carried out in a laboratory flume to investigate the interaction of surface wave and unidirectional current over a pair of hemispherical obstacles with relative spacing, L/d = 4 where L is center to center spacing and d is the obstacle height. The effect of surface waves and current interaction on the mean velocity profile, turbulence intensities and Reynolds shear stress of an open channel flow under the influence of two hemispherical obstacles has been presented in this paper. The components of velocity along three different directions were measured using 3D micro-acoustic Doppler velocimeter. The experiments were conducted for Reynolds number 58800. Quadrant analysis has been adopted to investigate the turbulence bursting events contributing to the Reynolds shear stress in the near-bed region. It is observed that closed to the top of the obstacles, the contribution to the total shear stress due to ejection and sweeping events changes with the superposition of waves.
Turbulence study over submerged obstacles on waves and currents combined flow
Barman, Krishnendu (Autor:in) / Debnath, K. (Autor:in) / Mazumder, B. S. (Autor:in)
ISH Journal of Hydraulic Engineering ; 23 ; 246-257
02.09.2017
12 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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