Prediction of batch heat transfer coefficients for pseudoplastic fluids ...

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correlations for the prediction of batch side heat transfer
coefficients. These data are summarized in Table 5-3. Two
general types of correlations were evaluated, those based
on the dDJlensional analysis developed in Chapter 3, and
those which are semi-emperical alterations of the present
correlation for Nel,rtonian fluids ..
FO'ur different types of impellers '(-Jere used in this
study: anchor, paddle, propeller, and turbine. Since tl1.e
geometry and flovl patterns for each L.'1lpeller may be different,
the constants of any correlations tested Her'e evaluated
separately for each impeller type.
Only one anchor
agitator was used and therefore the effects of impeller
diameter and ,,,,idth could not be evaluated for the anchor ..
The propellers were geometrically similar and therefore
only the diameter effect was measured.
Results of Dimensional Analysis
The dimensional analysis of Chapter 3 provided
(~~~ra.) a. b )C(: d e
AlMI~C~~ fl!p/t" (~) (g: :;) ~ (3-8.0
as an equation 1:Jhich characterizes the batch heat transfer
system.
The constants of this correlation\labeled correlation
A) Here evaluated and are presented in Table 5-4.
correIa tion ",ri th its constants Has then used to calculate
a "predicted Nusselt number" for each of the data pOints.
The percentage error
The