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	On the orbital motion of a rotating inner cylinder in annular flow
	Feng, Shunxin ; Li, Qibing ; Fu, Song
	2010-05-07 ; 2010-05-07
关键词	annular flow eccentricity rotating cylinder orbital motion flow resistance DEVELOPED LAMINAR-FLOW NON-NEWTONIAN LIQUIDS ECCENTRIC ANNULUS FLUID Computer Science, Interdisciplinary Applications Mathematics, Interdisciplinary Applications Mechanics Physics, Fluids & Plasmas
中文摘要	In this paper, numerical calculations have been performed to analyse the influence of the orbital motion of an inner cylinder on annular flow and the forces exerted by the fluid on the inner cylinder when it is rotating eccentrically. The flow considered is fully developed laminar flow driven by axial pressure gradient. It is shown that the drag of the annular flow decreases initially and then increases with the enhancememt of orbital motion, when it has the same direction as the inner cylinder rotation. If the eccentricity and rotation speed of the inner cylinder keep unchanged (with respect to the absolute frame of reference), and the orbital motion is strong enough that the azimuthal component (with respect to the orbit of the orbital motion) of the flow-induced force on the inner cylinder goes to zero, the flow drag nearly reaches its minimum value. When only an external torque is imposed to drive the eccentric rotation of the inner cylinder, orbital motion may occur and, in general, has the same direction as the inner cylinder rotation. Under this condition, whether the inner cylinder can have a steady motion state with force equilibrium, and even what type of motion state it can have, is related to the linear density of the inner cylinder. Copyright (c) 2006 John Wiley & Sons, Ltd.
语种	英语 ; 英语
出版者	JOHN WILEY & SONS LTD ; CHICHESTER ; THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/15650]
专题	清华大学
推荐引用方式 GB/T 7714	Feng, Shunxin,Li, Qibing,Fu, Song. On the orbital motion of a rotating inner cylinder in annular flow[J],2010, 2010.
APA	Feng, Shunxin,Li, Qibing,&Fu, Song.(2010).On the orbital motion of a rotating inner cylinder in annular flow..
MLA	Feng, Shunxin,et al."On the orbital motion of a rotating inner cylinder in annular flow".(2010).

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