Pseudoplastic fluids such as cellulose ester, boiled starch and solution of high polymer are important materials in chemical industry. Neverthless, few researches have been reported from the stand point of chemical engineering and as a fundamental research, measuring the pressure drop and computing average velocity of boiled starch flowing in 1/2" gas pipe, the authors calculated the velocity distribution by Krieger's method. The results of the experiments are shown in Fig. 6, 7 and 8.
From the results, the authors have ascertained that the Waele-Ostwald's equation
(1)
is approximately satisfactory, and tbat the authors may define η
psu as "pseudoplastic viscosity, " which has the dimension indicated by the equation (2),
(2)
Applying the Waele-Ostwald's equation to the pseudoplastic fluids flowing in a circular pipe, the authors have obtained n and η
psu by the following equation:
(3)
The authors have defined, also, Reynolds' number for pseudoplastic fluids as follows:
(4)
The log-log correlation of friction factor and Re
psu calculated by equation (4) coincided with that of Newtonian fuids.
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