Author(s): Masayuki Takahashi; Youichi Yasuda; Iwao Ohtsu
Linked Author(s): Masayuki Takahashi, Iwao Ohtsu, Youichi Yasuda
Keywords: Stepped channel; Reynolds number; Skimming flow; Air-concentration profile; Aerated flow
Abstract: Stepped Channels are effective for dissipating the energy of heigh-velocity flows in channels. For hydraulic design of stepped channels, it is important to clarify the effect of Reynolds number on characteristics of skimming flows in stepped channels. This paper presents the effect of Reynolds number on the air-concentration profile of skimming flows. The analysis of the experimental data including the data of Boes and Hager (2003) reveals that the effect of Reynolds number Re on the air-concentration profile is negligible in the range of 4. 0 × 104 ≤ Re ≤ 3. 7×105. While, in the range of Re < 3. 0 × 104, the air-concentration profile depends on Reynolds number Re.
Year: 2005