Experimental Study on the Wake Caused by Square Bar Roughness

Abstract

Characteristics of the flow around an artifitial roughness are investigated experimentally by focussing attention on the wake behind the roughness. In this study, a single square bar was placed on the channel bottom as a roughness, and the turbulent measurement was conducted to understand the essence of boundary layer development. Some important results, including the detailed structure of turbulent velocity field as well as temporally averaged one, were reported.