Author(s): M. J. Ostad Mirza Tehrani; M. Pfister; A. J. Schleiss; J. Matos; A. R. Zarrati

Linked Author(s): Jorge Matos, Michael Pfister, Amir Reza Zarrati, Anton J. Schleiss

Keywords: Skimming flow; Stepped spillway; Slope change; Air concentration; Flow bulking

Abstract: Abrupt slope changes on stepped chutes may have a major effect on the hydraulics of skimming flows. The present study shows that the minimum discharge tested in the skimming flow regime leads to higher values of flow bulking depth (Y99), bottom air concentration (Cb), and mean (depth-averaged) air concentration (Cmean). These observations are related to a more pronounced spray occurrence for the smallest flow rate, due to distinct air-water flow condition in the vicinity of the slope change.

DOI: https://doi.org/10.3850/978-981-11-2731-1_328-cd

Year: 2018