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

and if' it is assumed that h' is almost equal to h equation
4-16 can be written
h = hI (1 + h Y L/kw) (4-17
hI is calculated from equation ~--13.
L
is the average distance of the ther.nlocouple junction
from the surface ~
0.02 inches = 0.001667 feet.
y~ is the thermal conductivity of' 316 stainless steel
Substituting the values for L and kw
(286)
h = h' (1 + 0.0001774 hI)
Apparent Vis~2sity
of' the Batch
The apparent viscosity of the batch is needed in the
Reynolds nilluber, Prandtl number, and viscosity ratio. It
can be calculated using equation 2-25.
(2-25
The apparent viscosity is expressed in Ib .. /sec. f't if' K is
expressed in Ib./ft. sec. n and N is expressed in rev. per.
second ..
The apparent viscosity of' the batch could also be expressed
(4-19
based on the theoretical 8.-l1alysis d:i.scussed in Chapte,;,s{~~,Wjo0
\i".2t~;