Velocity Distribution and Reynolds' Number of Pseudoplastic Fluids

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Other Title
  • 擬塑性流体の速度分布とレイノルズ数について

Description

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.<BR>From the results, the authors have ascertained that the Waele-Ostwald's equation<BR>(1)<BR>is approximately satisfactory, and tbat the authors may define ηpsu as "pseudoplastic viscosity, " which has the dimension indicated by the equation (2), <BR>(2)<BR>Applying the Waele-Ostwald's equation to the pseudoplastic fluids flowing in a circular pipe, the authors have obtained n and ηpsu by the following equation:<BR>(3)<BR>The authors have defined, also, Reynolds' number for pseudoplastic fluids as follows:<BR>(4)<BR>The log-log correlation of friction factor and Repsu calculated by equation (4) coincided with that of Newtonian fuids.

Journal

  • Chemical engineering

    Chemical engineering 20 (1), 15-23, 1956

    The Society of Chemical Engineers, Japan

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