Stability of Nonparallel Developing Flow in an Annulus to Asymmetric Disturbances

[+] Author and Article Information
V. K. Garg

Department of Mechanical Engineering, Indian Institute of Technology, Kanpur 208016, India

J. Appl. Mech 49(2), 436-439 (Jun 01, 1982) (4 pages) doi:10.1115/1.3162107 History: Received May 01, 1981; Revised October 01, 1981; Online July 21, 2009


Linear spatial stability of the nonparallel developing flow in a concentric annulus shows that the asymmetric disturbance with an azimuthal wave number equal to unity is more unstable than the axisymmetric disturbance at all axial locations. Also, in the near entry region, the critical Reynolds number corresponding to the parallel flow theory is as much as three times that due to the nonparallel theory for some values of the annular diameter ratio.

Copyright © 1982 by ASME
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