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

158
coefficient. Thus, for the water and glycerine it was
only necessary to evaluate the viscosity coefficient and
express it in the correct units.
The viscosity of l-Iater \·ras determined from Bingham t s
equation for the fluidity, ( ¢ ), of water as a fUl~ction
of temperature (17).
¢ = 0.021~-B2 [(T-8.L~35) + j8078.~. + (T-8.435)2] - 1.20 (A-l
\.Jhere ¢ is expressed in centipoise -1 and
T is the temperature in degrees Centigrade.
The relationship betl-Jeen fluidity and viscosi ty is
jl = l/¢
(A-2
The fluid consistency index in the proper units is obtained
by multiplying the viscosity in centipoise by
6.72 x 10-4
K = 6.72 x 10-4p
(A-3
The viscosity of 93.7 percent clycerine was graphically
interpolated from data of Segur and Oberstar (177) and is
given in Table A-l.