環状流路におけるトップフラッディング
1993 年 59 巻 568 号 p. 3925-3931
詳細
1993 年 59 巻 568 号 p. 3925-3931
Top flooding experiments in annuli with various aspect ratios were conducted to study the flooding characteristics and similarities with those in thin rectangular channels. Top flooding in high-aspect annuli were characterized using the average circumference W as a characteristic length in Wallis nondimensional velocity. The flow in the high-aspect annuli consisted of approximately four "unit cells" around the circumference, each of which was similar to that in the thin rectangular channels. Therefore the characteristic length was the circumference corresponding to the wider span in the thin rectangular channels. When the annulus was actually divided to four "cells" by inserting vertical walls, the descending-water flow rate was increased due to the nonuniform flow distribution among the "cells".
