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. The newly conceived experimental rig allows quantifying mixing, by measuring velocity fields and concentration fields for different Reynolds numbers along vertical and horizontal sections directly behind the mixer. 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 relationships between velocity and concentration. Furthermore, the mixing efficiency has been quantified by considering the segregation index. In order to quantify micro-mixing a chemical reaction, involving a fluorescent tracer, has been chosen and imaged simultaneously with the macro-mixing, characterized by another tracer. Theoretical micro-mixing models have been tested by considering their accuracy in reproducing experimental data and first comparisons between experimental and numerical velocity fields are presented. The experimental data is documented in a data base, freely accessible through Internet, to allow a quantitative validation of numerical codes.
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- Experimental Investigation of a Static Mixer for Validation of Numerical Simulations
- Springer Berlin Heidelberg