The rheological behavior of concentrated orange juice (FCOJ) has been shown to be shear-thinning in several recent studies. Concentric cylinder viscometers have been used to obtain the rheological data in these studies. The effect of temperature, soluble solids, and pulp content has been described quantitatively. To estimate the pumping power requirements of FCOJ, the mechanical energy balance equation is used together with the necessary estimates of pressure drop due to friction in pipes and fittings estimated from empirical equations. Empirical equations are available to calculate power consumption during agitation of concentrated orange juice in terms of the dimensionless groups: power and agitator Reynolds numbers for several types of agitators.
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