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Numerical and Experimental Analysis of the Daughter Distribution in Liquid‐Liquid Stirred Tanks
Author(s) -
Maluta Francesco,
Buffo Antonio,
Marchisio Daniele,
Montante Giuseppina,
Paglianti Alessandro,
Vanni Marco
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.202100237
Subject(s) - impeller , turbulence , breakup , mechanics , population balance equation , liquid liquid , population , computational fluid dynamics , drop (telecommunication) , statistical physics , mathematics , physics , chemistry , engineering , chromatography , mechanical engineering , demography , sociology
The drop size distributions (DSDs) of a dilute immiscible liquid‐liquid mixture were measured in a fully turbulent stirred tank operating at different impeller speeds. The results were used to infer the best daughter distribution function (DDF) leading to the best reproduction of the shape of the DSD. Bell‐shaped, U‐shaped, M‐shaped, and uniform statistical DDFs were studied, producing from two to four daughters from each breakup event. A simplified approach from the literature was adopted to solve the population balance equation that considers the spectrum of the turbulence inside the tank obtained from computational fluid dynamics simulations. The U‐shaped distribution producing four fragments better reproduces the shape of the experimental DSD in the studied system.