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International Journal of Rotating Machinery
Volume 2008, Article ID 406809, 6 pages
Research Article

Thermal-Fluid Transport Phenomena between Twin Rotating Parallel Disks

1Department of Mechanical System Engineering, Kumamoto University, Kumamoto 860-8555, Japan
2Mechanical Engineering and Applied Mechanics, University of Michigan, Ann Arbor, MI 48109, USA

Received 11 April 2008; Accepted 5 June 2008

Academic Editor: Gerard Bois

Copyright © 2008 Shuichi Torii and Wen-Jei Yang. 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.


This paper investigates thermal-fluid transport phenomena in laminar flow between twin rotating parallel disks from whose center a circular jet is impinged on the heated horizontal bottom disk surface. Emphasis is placed on the effects of the Reynolds number, rotation speed, and disk spacing on both the formations of velocity and thermal fields and the heat transfer rate along the heated wall surface. The governing equations are discretized by means of a finite-difference technique and are numerically solved to determine the distributions of velocity vector and fluid temperature under the appropriate boundary conditions. It is found from the study that (i) the recirculation zone which appears on the bottom disk moves along the outward direction with an increase in the Reynolds number, (ii) when the Reynolds number is increased, heat transfer performance is intensified over the whole disk surface and the minimum value of the heat transfer rate moves in the downstream direction, and (iii) the heat transfer rate is induced due to the disk rotation, whose effect becomes larger due to the upper disk rotation.