TURBULENCE STRUCTURE OF OPEN-CHANNEL FLOWS INCLUDING BUBBLE PLUMES

Abstract

The aim of the present study is to reveal the hydrodynamic properties in open-channel flows including the rising-bubbles. Particularly, when we consider effective control techniques of aeration in actual rivers, turbulence structure of open-channel flows including bubble plumes has to be investigated. However, such a bubbly open-channel flow has very complicated phenomena, and thus there are few previous studies that have been tried by high-accurate measurements and numerical simulations.
Therefore, in this study, PIV measurements using high-speed CCD camera have been conducted, and consequently, the rising-lines of bubble plumes, primary velocity distributions and turbulence structure have been revealed experimentally.