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Population balance modeling of aerated stirred vessels based on CFD
Author(s) -
Venneker Bart C. H.,
Derksen Jos J.,
Van den Akker Harrie E. A.
Publication year - 2002
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690480404
Subject(s) - turbulence , bubble , mechanics , coalescence (physics) , computational fluid dynamics , population balance equation , breakup , population , mass transfer , local bubble , thermodynamics , chemistry , physics , demography , quantum mechanics , interstellar medium , sociology , astrobiology , galaxy
A developed model predicts local gas fraction and bubble‐size distributions for turbulent gas dispersion in a stirred vessel, based on the population balance equations (PBE), with relations taken from literature for bubble coalescence and breakup derived from isotropic turbulence theory. The transport of bubbles throughout the vessel is simulated by a scaled single‐phase flow field obtained by CFD simulations. Model predictions for the gas fractions in pseudoplastic Xanthan solutions are compared with local measurements and agree well qualitatively. This formulation overcomes the necessity of choosing a constant bubble size throughout the domain, as is done in two‐fluid models and is, therefore, more reliable in mass‐transfer calculations.