Effects of relaxation time of surfactant solutions on turbulence statistics in two-dimensional turbulemt flow

Abstract

An experimental study was performed to investigate the relationship between the extensional rheological properties of drag reducing string-like micelle solutions and turbulent statistics in two-dimensional (2D) flow. Cationic surfactant and counter ion supplier were added to 2D turbulent flow, and the flow field and vortex shedding in the flow were visualized using interference patterns and particle image velocimetry (PIV). We considered the relationship between vortex shedding and drag reduction properties of the fluid.