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Visualization of reactive and non-reactive mixing processes in a stirred tank using planar laser induced fluorescence (PLIF) technique
- Source :
- Chemical Engineering Research and Design. 90:524-533
- Publication Year :
- 2012
- Publisher :
- Elsevier BV, 2012.
-
Abstract
- A comprehensive study on the liquid mixing with/without instantaneous reactions was conducted using planar laser induced fluorescence (PLIF) technique, where a novel reactive PLIF technique was adopted to quantitatively visualize the dynamic variation of the concentration of fluorescence dye due to signal quenching by a Fenton reaction. The factors (e.g., tracer injection direction, tracer injection position, impeller speed) influencing the reactive and non-reactive mixing processes were investigated, and the mixing performances were characterized by non-reactive mixing times (τ95 and τ99), and reactive mixing time (θ99), respectively. The experimental results from the 2-D measurements of liquid mixing behavior emphasized the significance of the understanding on the spatio-temporal mixing patterns: not only did the tracer injection position affect the mixing performances in the stirred tank, but also the sampling position to monitor the mixing status would lead to a large difference in evaluating the mixing performance. For the stirred tank with fast reactions, the reactive mixing performance had a strong interplay with the non-reactive mixing.
Details
- ISSN :
- 02638762
- Volume :
- 90
- Database :
- OpenAIRE
- Journal :
- Chemical Engineering Research and Design
- Accession number :
- edsair.doi...........b7b2477a5e33779af7bd9cff4611264d