Journal of Zhejiang University SCIENCE
(ISSN 1009-3095, Monthly)
2003   Vol. 4   No. 4   p.407-414

Low frequency oscillatory flow in a rotating curved pipe

CHEN Hua-jun(陈华军)(Department of Mechanics, Zhejiang University, Hangzhou 310027, China)
ZHANG Ben-zhao(章本照)(Department of Mechanics, Zhejiang University, Hangzhou 310027, China)
SU Xiao-yan(苏霄燕)(Department of Mechanics, Zhejiang University, Hangzhou 310027, China)

Abstract:The low frequency oscillatory flow in a rotating curved pipe was studied by using the method of bi-parameter perturbation. Perturbation solutions up to the second order were obtained and the effects of rotation on the low frequency oscillatory flow were examined in detail. The results indicated that there exists evident difference between the low frequency oscillatory flow in a rotating curved pipe and in a curved pipe without rotation. During a period, four secondary vortexes may exist on the circular cross-section and the distribution of axial velocity and wall shear stress are related to the ratio of the Coriolis force to centrifugal force and the axial pressure gradient.
Keywords:Oscillatory flow, Secondary flow, Perturbation method, Rotating pipe

CLC Number:O357.1 Document ID:A

Foundation Item:Project(No.10272096) supported by the National Natural Science Fundation of China
Author Resume:ZHANG Ben-zhao(章本照),E-mail: mec-zbzq@emb.zju.edu.cn

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Manuscript Received: 2002 Aug. 8

Manuscript Revised: 2002 Sept. 29

Published: 2003 Aug. 30