Thermal Fluid Flow Transport Phenomenon in Unsteady Rotating Drum during Spin-Down ProcessReport as inadecuate




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International Journal of Rotating Machinery - Volume 2005 2005, Issue 3, Pages 197-201



Department of Mechanical Engineering and Materials Science, Kumamoto University, Kumamoto 860-8555, Japan

Mechanical Engineering and College of Engineering, The University of Michigan, Ann Arbor 48109, MI, USA

Received 10 March 2005

Copyright © 2005 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.

Abstract

Numerical analysis is performed on unsteady-statethermal fluid flow transport phenomena in a rotating drum heatedat constant wall temperature during a spin-down process. Emphasisis placed on the effect of aspect ratio of the drum on thevelocity and temperature fields. The governing equations arediscretized by means of a finite-difference technique andnumerically solved to determine the distributions of velocityvector and fluid temperature in the drum. It is disclosed from thestudy that i the formation of Ekman boundary layers on bothsidewalls of the drum results in a pair of recirculating flows,and ii an attenuation of the flow velocity is affected by theaspect ratio of a drum. Results may be used to develop a method toachieve uniform mixing in an enclosed vessel.





Author: Shuichi Torii and Wen-Jei Yang

Source: https://www.hindawi.com/



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