PIV measurements of large-scale turbulence structures on drag-reducing turbulent boundary layer flow with surfactant injection

Abstract

In this study, we conducted PIV measurements for a turbulent boundary layer with nonionic surfactant solution injection from wall surfactant at the momentum thickness Reynolds number up to 1500. The nonionic surfactant, which mainly consists of oleyldimenthylamineoxide (ODMAO), was used. Turbulence structures were investigated for water and surfactant injection flows.