An evaluation of non-Newtonian flow in pipe lines / Ruth N. Weltmann.
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| Main Author: | |
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| Corporate Author: | |
| Format: | Government Document Book |
| Language: | English |
| Published: |
Washington, D.C. :
National Advisory Committee for Aeronautics,
1955.
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| Series: | Technical note (United States. National Advisory Committee for Aeronautics) ;
3397. |
| Subjects: |
| Abstract: | An analysis is presented of a method for determining pressure losses due to the flow of non-newtonian materials in pipe lines by using basic flow data obtained from measurements of flow curves, which are rate-of-shear - shearing-stress curves. The advantages of properly designed rotational viscometers over capillary viscometers for measuring these flow curves and interpreting them to obtain the basic flow parameters are discussed. Dimensionless parameters are cpipe linesalculated from these basic flow data and are used to construct a generalized friction diagram to describe the flow characteristics of Newtonian and non-Newtonian materials in pipe lines. Reported flow and pressure data are analyzed. Flow-pressure losses due to the flow of non-Netionian materials in pipe lines, as calculated by the use of reported basic flow data and the generalized friction diagram, are compared with those obtained directly from reported pressure measurements in the pipe line. The importance of considering the effect of temperature on the flow parameters of non-Newtonian materials, when making flow-pressure-loss calculations for the flow in pipes, is mentioned. The pipe transition pressure losses expected from non-Newtonian materials are discussed. |
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| Item Description: | "February 1955." NACA TN Number 3397. |
| Physical Description: | 40 pages : illustrations ; 27 cm. |
| Bibliography: | Includes bibliographical references. |
| Action Note: | committed to retain |