液层厚度对浮力-热毛细对流面型的影响  

EXPERIMENTAL STUDY ON THE INFLUENCE OF THE DEEPTH OF LIQUID LAYER TO FREE SURFACE IN BUOYANT-THERMCAPILLARY CONVECTION

作　　者：段俐[1] 康琦[1] 胡文瑞[1] 

机构地区：[1]中国科学院力学研究所国家微重力实验室,北京l00080

出　　处：《力学学报》2004年第6期641-648,共8页Chinese Journal of Theoretical and Applied Mechanics

摘　　要：将Michelson光学干涉测量系统与图像处理技术相结合,发展形成一种实时诊断热毛细对流和浮力对流流体表面形貌的实验测量系统.采用光学干涉测量方法研究了两端带有温差的矩形池内薄层流体的对流、表面变形、以及表面波的基本问题.应用Fourier变换方法对实验结果进行计算和分析,得到了流体表面变形和表面波的定量的实验结果.实验结果表明了在浮力-热毛细对流的发展过程中,首先出现流体的表面变形,之后在该变形的基础上,叠加了一个表面波的信息,该表而变形和表面波与流体的温度梯度、表面张力、以及浮力有直接的关系;表面波隐藏在表面变形内.An optical diagnostic system consisting of Michelson interferometer with image processor has been developed for study of the kinetics of Buoyant-Thermcapillary Convection. The convection, surface deformation and surface wave in a rectangular cavity with different temperature's sidewalls have been investigated. Fourier transformation is used to grating analysis. The quantitative results of surface deformation and surface wave have been calculated from the interference fringe patterns. The present experiment demonstrates that surface deformation and surface wave are related with temperature gradient, surface tension and buoyancy, surface wave is wrapped in surface deformation.

关 键 词：表面波 热毛细对流 流体 光学 FOURIER变换 层流 浮力 面型 体表 层厚 

分 类 号：O353[理学—流体力学] R783.5[理学—力学]