The laminar-turbulent transition in nonisothermal flow of pseudoplastic fluids in tubes

✍ Scribed by Richard W. Hanks; E. B. Christiansen

• Publisher: American Institute of Chemical Engineers
• Year: 1962
• Tongue: English
• Weight: 553 KB
• Volume: 8
• Category: Article
• ISSN: 0001-1541
• DOI: 10.1002/aic.690080409

✦ Synopsis

Abstract

Ryan and Johnson's treatment of the transition from laminar to turbulent flow is extended to include the heated flow of pseudoplastic liquids in smooth tubes. A limitation is pointed out for the case of Bingham plastic fluids.

The theoretical results of the present investigation are compared with experimental data obtained for a large number of pseudoplastic fluids having widely variant rheological properties. It is found that the theoretically predicted flow rates corresponding to the inception of turbulence agree with the observed values to within ±6.7%. The theoretical critical wall shear stresses agree within ±3.87% with experiment.