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Secondary Flow and Residence Time Distribution in Food Processing Holding Tubes with Bends
Author(s) -
Sandeep K.P.,
Zuritz C.A.
Publication year - 1999
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1999.tb12256.x
Subject(s) - residence time (fluid dynamics) , residence time distribution , tube (container) , mechanics , flow (mathematics) , residence , particle (ecology) , volumetric flow rate , polystyrene , particle size , materials science , viscosity , standard deviation , particle size distribution , chemistry , mathematics , composite material , physics , statistics , geology , polymer , geotechnical engineering , demography , oceanography , sociology
Residence times of nearly neutrally buoyant polystyrene particles flowing with an aqueous solution of carboxymethylcellulose were measured in each of 4 straight sections of holding tubes that were connected by 180° bends. Equations were developed to predict mean, minimum, and standard deviations of residence times in individual tubes and in the entire assembly as a function of viscosity, particle size, particle concentration, and flow rate. The residence time distribution in the 4 th tube was always narrower than that in the 1 st tube, and the ratio of the mean to minimum residence time was always between 1.07 and 1.20. These results can help in the design of appropriate holding tubes for food processing.