Simultaneous measurements of instantaneous concentrations of two reacting species in a turbulent flow with a rapid reaction

Abstract

An original technique is developed to measure simultaneously the instantaneous concentrations of two reacting species being mixed and reacted in a turbulent flow with a second-order rapid reaction between acetic acid and ammonium hydroxide. The technique combines laser fluorescence and electrode-conductivity methods and it enables simultaneous measurements of concentrations of two reacting species with a spatial resolution much less than the concentration–dissipation scale in grid-generated tubulence.