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Connection of Hydrodynamics and Nucleation Kinetics in Dual‐Impeller Crystallizers
Author(s) -
Čelan Antonija,
Ćosić Marija,
Penga Željko,
Kuzmanić Nenad
Publication year - 2021
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.202000515
Subject(s) - impeller , nucleation , microscale chemistry , turbine , slip factor , materials science , mixing (physics) , kinetics , mechanics , mechanical engineering , thermodynamics , engineering , physics , mathematics , classical mechanics , mathematics education , quantum mechanics
The influence of hydrodynamic conditions in dual‐impeller crystallizers at different impeller spacings on nucleation kinetics was investigated. Dual‐pitched‐blade turbine (2 PBT) and dual‐straight‐blade turbine (2 SBT) impeller configurations were used. To analyze hydrodynamic conditions at different impeller spacings, a computational fluid dynamics model was developed and validated by experimentally determining mixing time and power input. Results show that nucleation kinetics in the 2 SBT impeller system is affected by the characteristic microscale parameters. The same was not observed in the 2 PBT impeller system. Also, as a consequence of higher shear stress values, smaller but less agglomerated crystals were obtained in 2 SBT impeller systems.