Abstract
Characteristics of turbulent structure of backward-facing step in turbulent open channel flow are investigated using 2D Laser Doppler Anemometry and flow visualization techniques which are dye injection method and DPTV (Dye streak pattern Particle Tracking Velocimetry). The results indicate that double structure of coherent structure is formed at the downstream of the step, and coherent structure formed at the upstream of the step plays an important role to generate three dimensional flow of the downstream of the step. Further, dye streak pattern of coherent structure formed at just downstream of the step is located in the high shear layer.
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