TY - JOUR
T1 - Breakage model development and application with CFD for predicting breakage of whey protein precipitate particles
AU - Zumaeta, Nixon
AU - Cartland-Glover, Gregory
AU - Heffernan, Sinead P.
AU - Byrne, Edmond P.
AU - Fitzpatrick, John J.
N1 - Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2005/7
Y1 - 2005/7
N2 - Particle breakage due to fluid flow through various geometries can have a major influence on the performance of particle/fluid processes and on the product quality characteristics of particle/fluid products. In this study, whey protein precipitate dispersions were used as a case study to investigate the effect of flow intensity and exposure time on the breakage of these precipitate particles. Computational fluid dynamic (CFD) simulations were performed to evaluate the turbulent eddy dissipation rate (TED) and associated exposure time along various flow geometries. The focus of this work is on the predictive modelling of particle breakage in particle/fluid systems. A number of breakage models were developed to relate TED and exposure time to particle breakage. The suitability of these breakage models was evaluated for their ability to predict the experimentally determined breakage of the whey protein precipitate particles. A "power-law threshold" breakage model was found to provide a satisfactory capability for predicting the breakage of the whey protein precipitate particles. The whey protein precipitate dispersions were propelled through a number of different geometries such as bends, tees and elbows, and the model accurately predicted the mean particle size attained after flow through these geometries.
AB - Particle breakage due to fluid flow through various geometries can have a major influence on the performance of particle/fluid processes and on the product quality characteristics of particle/fluid products. In this study, whey protein precipitate dispersions were used as a case study to investigate the effect of flow intensity and exposure time on the breakage of these precipitate particles. Computational fluid dynamic (CFD) simulations were performed to evaluate the turbulent eddy dissipation rate (TED) and associated exposure time along various flow geometries. The focus of this work is on the predictive modelling of particle breakage in particle/fluid systems. A number of breakage models were developed to relate TED and exposure time to particle breakage. The suitability of these breakage models was evaluated for their ability to predict the experimentally determined breakage of the whey protein precipitate particles. A "power-law threshold" breakage model was found to provide a satisfactory capability for predicting the breakage of the whey protein precipitate particles. The whey protein precipitate dispersions were propelled through a number of different geometries such as bends, tees and elbows, and the model accurately predicted the mean particle size attained after flow through these geometries.
KW - computational fluid dynamics
KW - dispersion
KW - flow of fluids
KW - precipitation (chemical)
UR - http://www.scopus.com/inward/record.url?scp=17644416107&partnerID=8YFLogxK
UR - http://www.sciencedirect.com/science/article/pii/S000925090500134X
U2 - 10.1016/j.ces.2005.02.016
DO - 10.1016/j.ces.2005.02.016
M3 - Article
AN - SCOPUS:17644416107
SN - 0009-2509
VL - 60
SP - 3443
EP - 3452
JO - Chemical Engineering Science
JF - Chemical Engineering Science
IS - 13
ER -