Chemical Engineering Science, Vol.73, 388-399, 2012
Experimental study of flow regime and mixing in T-jets mixers
The flow field in T-jets mixers is studied experimentally for different geometrical parameters using Planar Laser Induced Fluorescence (PLIF). A particular chaotic flow regime is reported for the first time from experimental work. It is shown that two geometrical parameters, the ratio of the mixing chamber width to the injectors' width, and chamber's width to the chamber's depth, have an impact on the flow dynamics as important as the jets Reynolds numbers that were here studied over a range of values from 50 to 500. The values of the geometrical parameters and operation Reynolds number that mark the transitions of flow regime in the T-jets mixers are reported, and the impact of the geometry on such transitions is analyzed. The main features of the flow regimes are related with the mixing efficiency in T-jets mixers. Computational Fluid Dynamics (CFD) simulations for a particular case are shown in order to reveal the 3D flow structure of chaotic flow regime. (C) 2012 Elsevier Ltd. All rights reserved.