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Alternative TitleCharacteristics of temperature oscillation inthermocapillary convection in rectangular pool
朱鹏; 段俐; 康琦
Source Publication北京航空航天大学学报
Other AbstractExperimental and numerical results on characteristics of temperature oscillation in a rectangular pool of silicone oil were presented. A thermocapillary-convection controlling system was established in laboratory to study the critical condition and characteristics of temperature oscillation. The applied temperature gradient along the fluid-gas interface drived shear flow along the free surface from hot to cold and a back flow in the underlying layer. When the temperature gradient increases to a critical value, the original steady flow will become unstable to oscillatory flow. And with the deeply increasement of the temperature gradient, the flow will finally transit to the state of chaos. A temperature measurement system, which consists of thermocouple, nano-voltmeter and data-acquiring computer, was used to record the temperature of the liquid dynamically. Critical conditions for different experimental parameters were obtained, and its relationship with Prandtl number and Bond number was discussed in details. In addition, thermocapillary convection in microgravity was simulated; Sloshing of free surface was observed, which is thought to be produced by the interaction between deformation of free surface and flow field.
Keyword热毛细对流 温度振荡 临界条件 微重力
Subject Area微重力流体力学
Indexed ByCSCD ; EI
Funding Organization国家自然科学基金资助项目(10972224,11032011); 中国科学院三期创新方向性项目(KJCX2-YW-L08)
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Document Type期刊论文
Corresponding Author朱鹏
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GB/T 7714
朱鹏,段俐,康琦. 热毛细对流模式转换及温度振荡特征[J]. 北京航空航天大学学报,2012,38(7):882-885.
APA 朱鹏,段俐,&康琦.(2012).热毛细对流模式转换及温度振荡特征.北京航空航天大学学报,38(7),882-885.
MLA 朱鹏,et al."热毛细对流模式转换及温度振荡特征".北京航空航天大学学报 38.7(2012):882-885.
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