The interrelationship of the viscosity, fat content and temperature of cream between 40° and 80°C

Author:

Phipps L. W.

Abstract

SummaryThe dynamic viscosity coefficients η of creams containing up to 50% fat have been determined at temperatures of approximately 40, 50, 60, 70 and 80°C. All the creams behaved as Newtonian liquids, the shear stress being proportional to rate of shear up to the maximum rate used of 100 sec−1. At a given temperature a linear dependence of log η on (φ+φ5/3) was obtained for φ < 0·4, where φ is the concentration (w/w) of fat. Interpolation formulae have been derived to enable η to be calculated at any temperature between 40 and 80°C and for any fat content up to 40%. Formulae for the density ρ of cream have also been deduced to permit kinematic viscosities η/ρ to be computed. Nomograms have been constructed to enable η and ρ to be readily determined without the use of the interpolation formulae and when slight loss in accuracy is unimportant.

Publisher

Cambridge University Press (CUP)

Subject

Animal Science and Zoology,General Medicine,Food Science

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3. Viscosity Relationships in Emulsions Containing Milk Fat.

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