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Mathematical Problems in Engineering
Volume 2012, Article ID 734784, 14 pages
Research Article

Unsteady Flow Produced by Oscillations of Eccentric Rotating Disks

Department of Mechanical Engineering, Yildiz Technical University, 34349 Istanbul, Turkey

Received 16 September 2012; Accepted 13 November 2012

Academic Editor: Anuar Ishak

Copyright © 2012 H. Volkan Ersoy. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


While the disks are initially rotating eccentrically, the unsteady flow caused by their oscillations in their own planes and in the opposite directions is studied. The analytical solutions to the problem are obtained for both small and large times, and thus the velocity field is determined for every value of time. The variations of all the parameters on the flow are scrutinized by means of the graphical representations. In particular, the effect of the ratio of the frequency of oscillation to the angular velocity of the disks is analyzed. The dependence of the oscillations in both - and -directions on the flow is examined. The influence of the Reynolds number is also investigated.