Rotating Flows Over a Rotating Disk for a Class of non-Newtonian Fluids

[+] Author and Article Information
H. J. Lugt, E. W. Schwiderski

U. S. Naval Weapons Laboratory, Dahlgren, Va.

J. Appl. Mech 34(4), 829-832 (Dec 01, 1967) (4 pages) doi:10.1115/1.3607842 History: Received December 05, 1966; Revised May 11, 1967; Online September 14, 2011


Axisymmetric rotating flows over a rotating disk for non-Newtonian fluids of Reiner-Rivlin type are calculated by means of an adjustable local boundary-layer approximation, which was recently introduced by the authors. Variation of the dynamic similarity parameter, which characterizes the non-Newtonian fluid, shows that secondary motions of stagnation, wake, or cell type can exist. The beginning of instability in Bödewadt-type motions, which indicates laminar flow separation from the surface of the disk is shifted to higher Reynolds numbers for non-Newtonian fluids. Furthermore, the largest tangential shear stress at the surface is exhibited by laminar flows of Newtonian fluids.

Copyright © 1967 by ASME
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