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

N"v = C Iv''' (;';~-"')&'i'~ (%t-n,) ) ~! K )+(lJt f ~3-73
fie ('N Fe ) ()( w {D d.) V1V
The same f(H~ !las beeR found su(!;cessf'ul for the resu.lts 01'
7 1
The Peelet number cam be \~itte~ as t!le pro~uet of the
Reynolds number and the Prandtl llfl..:m:J.ber, provided the apparent
visc0sity u.se~
e Npe:: IJJ. V
;ta"
waleh CaE. be written
is the same in beth.
C p I'd //
A
(3-74
Jf/pe =eL>a Z N
,/ / 1/
/Va
if NDe. is substituted
for V.
(3-75
The Reynolds num.ber vIas previ0usly defined as
II j) 2 C -../1'V I
~e := f Q IV / /.(
(3-32
An apparent viscosity may be 0btained by equatiag
equatioR 3-32 with equati0~ 3-33 and solving for the viseosity..
Simee this term is n0t a true viscosity, it is
called an aJYparent viscosi ty,fta. It ..
r
/1
q = f(AI t/YV-/
(3-76
With equation 3-76 as the definiti~n of the apparent viscosity,
the Reyn0lds number is defined by equation 3-32
and tlae Prana tl number by