抄録
At the fundamental studys of the three dimensional tuburent structure, visualization technique by dye injection methord were used. Experiment have done inrectanguler open channel for various aspect ratio (B/H=2, 1, 1/2). There are two cases of channel conditions, one is a smooth serface and other have a roughnessbed. In oder to visualize the turburent structure, water with FLUORESCEIN SEDIUM (Uranin, C20H10O5Na2) and vertical (or horizontal) slice of light were used. In this paper reration between turburent structure and mechanism of scondary flow are decribed.
