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RESEARCH PAPERS

Recirculation Zones in a Cylindrical Container

[+] Author and Article Information
Craig C. Jahnke

Department of Mechanical, Aerospace, Industrial and Manufacturing Engineering, Polytechnic University, Brooklyn, NY 11201

Daniel T. Valentine

Department of Mechanical and Aeronautical Engineering, Clarkson University, Potsdam, NY 13699-5725

J. Fluids Eng 120(4), 680-684 (Dec 01, 1998) (5 pages) doi:10.1115/1.2820723 History: Received November 05, 1997; Revised July 07, 1998; Online December 04, 2007

Abstract

The flow field induced inside a cylindrical container by the rotation of the two end walls is described. It is shown that stagnation points leading to separation bubbles occur on the axis of rotation and/or the bottom end wall for certain ranges of the characteristic parameters; the Reynolds number, the aspect ratio of the container, and the ratio of the rotation rates of the end walls. Flow fields in a container of aspect ratio 2.0 are examined for Reynolds numbers from 100 to 3000 and ratios of the rotation rates of the top and bottom end walls from −0.10 to 1.0. For a range of ratios of the rotation rates of the top and bottom end walls and Reynolds numbers it is shown that ring vortices surrounding a columnar vortex core exist.

Copyright © 1998 by The American Society of Mechanical Engineers
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