Fluid dynamics and mixing behavior of a static mixer using simultaneously Particle Image Velocimetry and Planar Laser-Induced Fluorescence measurements

The mixing behavior around a SMX-type static mixer segment has been investigated experimentally by using Particle Image Velocimetry (PIV) and Planar Laser-Induced Fluorescence (PLIF) simultaneously. To quantify mixing, velocity fields and concentration fields have been measured for different Reynolds numbers along vertical and horizontal sections directly behind the mixer. The experimental data have been post-processed. A spectral analysis of the simultaneous PIV and PLIF measurements has been carried out, in order to determine the characteristic frequencies induced by the mixer and correlations between velocity and concentrations. Furthermore, the mixing efficiency has been quantified by considering the segregation index.