Two bifurcation processes for onset of oscillatory thermocapillary convection in a floating half zone

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	Two bifurcation processes for onset of oscillatory thermocapillary convection in a floating half zone
	Hu WR(胡文瑞); Hu WR
	2007
会议名称	5th International Conference on Nonlinear Mechanics (ICNM-V)
会议日期	JUN 11-14, 2007
会议地点	Shanghai, PEOPLES R CHINA
页码	33-33
通讯作者	Hu WR
中文摘要	An overview on the onset of thermocapillary oscillatory convection in a floating half zone is provided, and it is a typical subject in the microgravity sciences related to the space materials science, especially the floating zone processing, and also to the microgravity fluid physics. The main interests are focused around the process for onset of oscillatory thermocapillary convection, which is known also as the bifurcation transition from quasi-steady convection to oscillatory convection. The onset of oscillation depends on a set of critical parameters, such as the Marangoni number, Prandtl number, geometrical parameters, and heat transfer parameters. Recent studies show that, there exists the bifurcation transition from steady and axial symmetric convection to the steady and axial non-symmetric convection before the onset of oscillation in cases of small Prandtl number fluids and in cases of larger Prandtl number fluids of fat liquid bridge with small aspect ratio. The transition process is a strong non-linear process because the velocity deviation has the same order of magnitude as that of an average flow after the onset of oscillation, and unsteady 3-D numerical simulation is suitable to do in depth analysis on strong non-linear process, and leads generally to a better comparison with the experimental results.
收录类别	CPCI-S
会议录	Proceedings Of The 5Th International Conference On Nonlinear Mechanics
会议录出版者	Shanghai
会议录出版地	Shanghai Univ Press
语种	英语
ISSN号	978-7-81118-164-7
WOS记录号	WOS:000250953200008
内容类型	会议论文
源URL	[http://dspace.imech.ac.cn/handle/311007/25476]
专题	力学研究所_力学所知识产出(1956-2008)
通讯作者	Hu WR
推荐引用方式 GB/T 7714	Hu WR,Hu WR. Two bifurcation processes for onset of oscillatory thermocapillary convection in a floating half zone[C]. 见:5th International Conference on Nonlinear Mechanics (ICNM-V). Shanghai, PEOPLES R CHINA. JUN 11-14, 2007.