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Interface stability in a capillary loop undergoing phase changes in non-gravitational conditions
Authors:ZhengKai Tu  Wei Liu  ZhiChun Liu  XiaoMing Huang
Institution:1 State Key Laboratory of Advanced Technology for Materials Synthesis and Progressing, Wuhan University of Technology, Wuhan 430070, China; 
2 Key Laboratory of Fuel Cell Technology of Hubei Province, Wuhan University of Technology, Wuhan 430070, China; 
3 College of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
Abstract:A mathematical model based on the Lucas-Washburn equation has been developed to address the relationships between capillary height, capillary radius and heat flux in a capillary loop. The stability criteria at the interface are studied in detail by introducing a small perturbation to the interfaces of the capillary loop. The formulae deduced as a consequence are used to analyze the influence of height of the capillary wick and the stability in a capillary loop undergoing phase changes.
Keywords:capillary column  phase change  Lucas-Washburn equation  stability  non-gravitational condition
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