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Effects of Fine Scale Turbulent Flow and Mixing in Agglomerative Precipitation
Author(s) -
Bałdyga J.,
Jasińska M.,
Krasiński A.,
Rožeń A.
Publication year - 2004
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.200401993
Subject(s) - economies of agglomeration , nucleation , supersaturation , turbulence , precipitation , brownian motion , mixing (physics) , chemistry , mechanics , thermodynamics , materials science , mineralogy , chemical engineering , physics , meteorology , engineering , quantum mechanics
Precipitation of a solid product from aqueous ionic solutions, including mixing, fast chemical reaction, nucleation, growth and agglomeration of crystals is considered. This work concentrates on the phenomenon of particle agglomeration which dominates the precipitation process at high supersaturation. Modeling of particle collision includes effects of bulk fluid motion, Brownian diffusion and colloidal forces for particles of equal and unequal size. The concept of probability of agglomeration based on multifractal formalism is introduced and applied. A simplified version of the model is linked to CFD and results of computations are compared with experimental data for barium sulfate precipitation.