Experimental Study on Surface Deformation and Surface Wave of Fluid Convection with Free Surface

CORC > 力学研究所 > 中国科学院力学研究所 > 力学所知识产出(1956-2008)

	Experimental Study on Surface Deformation and Surface Wave of Fluid Convection with Free Surface
	Duan L(段俐); Hu WR(胡文瑞); Duan L(段俐); Kang Q(康琦)
	2004-10-04
会议名称	The 55th International Astronautical Congress-Vancouver, Canada,2004-10-04
会议日期	2004-10-04
会议地点	Vancouver, Canada
通讯作者	段俐
中文摘要	An optical diagnostic system consisting of Michelson interferometer with image processor has been developed for study of the kinetics of thermal capillary convection and buoyancy convection. This optical interferometer has been used to observe and measure surface deformation and surface wave of capillary convection and buoyancy convection in a rectangular cavity with different temperature’s sidewalls. Fourier transformation is used to image processing. The quantitative results of surface deformation and surface wave have been calculated from the interference fringe pattern. With the increasing of temperature gradient, the liquid surface slant gradually. It’s deformation has been calculated, which is related directly with temperature gradient. This is one of the characters introducing convection. Another interesting phenomenon is the inclining direction, which is different when the liquid layer is thin or thick. When the liquid layer is thin, convection is mainly controlled by thermocapillary effect. However, When the liquid layer is thick, convection is mainly controlled by buoyancy effect. Surface deformation in the present experiment are more and more declining in this process. The present experiment proved that surface deformation appears before the appearance of surface wave on fluid convection, it is related with temperature gradient, and the height of liquid layer, and lies on capillary convection and buoyancy convection. The present experiment also demonstrates that the amplitude of surface wave of thermocapillary-buoyancy convection is much smaller than surface deformation, the wave is covered by deformation.
会议录	The 55th International Astronautical Congress
学科主题	力学
语种	英语
内容类型	会议论文
源URL	[http://dspace.imech.ac.cn/handle/311007/13836]
专题	力学研究所_力学所知识产出(1956-2008)
通讯作者	Duan L(段俐)
推荐引用方式 GB/T 7714	Duan L,Hu WR,Duan L,et al. Experimental Study on Surface Deformation and Surface Wave of Fluid Convection with Free Surface[C]. 见:The 55th International Astronautical Congress-Vancouver, Canada,2004-10-04. Vancouver, Canada. 2004-10-04.