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

6..3
expressed as
-5 1880 13 h270
7.17 x 10 x 10 T + 5.81 x 10- x 10 ~ {A-7
1-Jhere ft is expressed in centipoise and T in degrees Kelvin.
Expressing the viscosity in the proper tel~s ru~d converting
the temperature term to degrees Centigrade gives
K = 6.72 x 10-4 [ 7.17 x 10- 5 x 10
4270 Jl
10 273+ rt
1880 13
273 +T + 5 .. 81 x 10- x
{A-8
This equation was solved for the temperatures listed in Table
A-I and reproduced the data to Hi thin ± three percent.
Non-Newtonian Fluids
Carbopol solutions have been reported to be well represented
by the pov.Jer lavr (63, 165) but the fluid consistency
index and flolN behavior index have not been determined for
a ll1Tide range of concentrations.
Furthermore, the Carbopol
resin seems to vary slightly. The method of solution preparation
and the degree of neutralization seem to effect
the values of the flmr! behavior properties. Thus it was
necessary to measure these properties.
"
The flow properties Here measured using a Brookfield""
LVT-5x-600 Synchro-Lectric Viscometer equipped vd th cylindrical
spindles.
This model has eight different speeds
of rotation; 3, 6, 15, 30, 60, 120, 300, and 600 revolutions
-l~
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