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TURBULENT SWIRLING FLOW AND MIXING IN A MULTI-INLET VORTEX REACTOR

Zhenping Liu
Department of Mechanical Engineering, Iowa State University, Ames, IA USA

Emmanuel Hitimana
Department of Mechanical Engineering, Iowa State University, Ames, IA 50011, USA

Michael G. Olsen
Department of Mechanical Engineering, Iowa State University, Ames, IA USA

James C. Hill
Department of Chemical and Biological Engineering, Iowa State University, Ames, IA USA

Rodney O. Fox
Department of Chemical and Biological Engineering Iowa State University Ames, IA USA

Sinopsis

Turbulent swirling flow and mixing in a multi-inlet vortex reactor (MIVR) are of interest due to the importance of MIVR in flash nanoprecipitation applications. In current work, velocity and passive scalar concentration fields in a MIVR have been measured by using stereoscopic particle image velocimetry (SPIV) and planar laser induced fluorescence (PLIF). Measurements were taken at three different heights in the reactor. The measurements are focused near the reactor center where most of the intensive mixing happens. The investigated Reynolds numbers based on the bulk velocity and diameter at one of the reactor inlets range from 3290 to 8225, resulting in a complex turbulent swirling flow inside the reactor. The velocity and concentration field data were analyzed for such flow statistics as mean velocity, Reynolds stress, two-point spatial correlations of velocity fluctuations, scalar mean and variance, and one-point concentration probability density functions (PDF).