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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

RHEOLOGICAL CHARACTERIZATION OF SUSPENSIONS OF SUCROSE CRYSTALS IN SATURATED SUCROSE SOLUTIONS

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Author(s):
De Souza, Ana Cristina [1] ; Telis-Romero, Javier [1] ; Nicoletti Telis, Vania Regina [1]
Total Authors: 3
Affiliation:
[1] UNESP, Dept Engn & Tecnol Alimentos, BR-15054000 Sao Jose Do Rio Preto, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: JOURNAL OF FOOD PROCESS ENGINEERING; v. 33, n. 6, p. 992-1009, DEC 2010.
Web of Science Citations: 0
Abstract

Suspensions formed by saturated sucrose solutions were analyzed at different temperatures (0 <= T <= 65C) and with different added fractions (0.005 <= phi <= 0.40) of known size sucrose crystals (0.163 <= d(p) <= 1.26 mm). Saturated sucrose solutions, taken as the suspension dispersant mean, were rheologically characterized using a concentric-cylinder rheometer and showed Newtonian behavior. The crystal suspensions were rheologically evaluated by using a mixer-type rheometer constituting an anchor impeller coupled to a rotational rheometer, also known as a mixer-type rheometer. The studied crystal suspensions also showed Newtonian behavior. Theoretical and semiempirical models were used to describe the correlation between suspension relative viscosity and crystal volumetric fraction. The best results were obtained using the Krieger and Dougherty, and the Mooney model, resulting in values of intrinsic viscosity, (eta), and maximum packing fraction, phi(m), compatible with data reported for coarse concentrated suspensions of nonspherical particles. (AU)