Title
Computational fluid dynamics analysis for process impact assessment during thermal pasteurization of intact eggs Computational fluid dynamics analysis for process impact assessment during thermal pasteurization of intact eggs
Author
Faculty/Department
Faculty of Sciences. Bioscience Engineering
Publication type
article
Publication
Des Moines, Iowa ,
Subject
Biology
Engineering sciences. Technology
Source (journal)
Journal of food protection. - Des Moines, Iowa
Volume/pages
68(2005) :2 , p. 366-374
ISSN
0362-028X
ISI
000226813900024
Carrier
E
Target language
English (eng)
Abstract
Transient temperature and albumen velocity profiles during thermal pasteurization of intact eggs were studied using a commercial computational fluid dynamics (CFD) package. Simulated temperature profiles were in close agreement with experimental data for eggs of different sizes. Convective heat transfer only occurred in the egg white fraction, and conductive heat transfer only occurred in the yolk. For process assessment, a generally accepted kinetic inactivation model for Salmonella Enteritidis was incorporated into the CFD analysis. Minimum process times and temperatures needed to provide equivalent pasteurization at 5-log reductions of the target microorganism were obtained on a theoretical basis. The combination of CFD analysis and inactivation kinetics can be very useful for assessing pasteurization of intact eggs and can enable processors to gain a better understanding of these processes and to establish process conditions for consumer-safe eggs.
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