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VELOCITY PROFILES OF FLUID/PARTICULATE MIXTURES IN PIPE FLOW USING MRI
Author(s) -
McCARTHY KATHRYN L.,
KERR WILLIAM L.,
KAUTEN ROBERT J.,
WALTON JEFFREY H.
Publication year - 1997
Publication title -
journal of food process engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.507
H-Index - 45
eISSN - 1745-4530
pISSN - 0145-8876
DOI - 10.1111/j.1745-4530.1997.tb00417.x
Subject(s) - carboxymethyl cellulose , residence time (fluid dynamics) , volumetric flow rate , particle (ecology) , particulates , spheres , particle size , flow (mathematics) , flow velocity , chemistry , materials science , mechanics , analytical chemistry (journal) , sodium , chromatography , physics , geology , oceanography , geotechnical engineering , organic chemistry , astronomy
Magnetic resonance imaging (MRI) techniques have been utilized to experimentally measure velocity profiles and apparent Theological properties of fluid/paniculate mixtures as functions of flow rate, particle loading, and particle size. The experimental velocity profiles were described by apower law model for these systems. A 3% aqueous sodium alginic acid solution was used to form two particle sizes of 2.5 mm and 5.0mm in diameter. The spheres were suspended in a 0.5% carboxymethyl cellulose solution at loadings ofO, 10, 20, and 30% by weight. The average fluid velocity ranged from 2–35 cm/s. The flow behavior index decreased as flow rate, particle loading or particles size increase. Cumulative residence time curves were evaluated based on this modeling procedure. Results of this research have direct application to aseptic processing of fluid/particulate mixtures.