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Evaporative and convective instability in the two-layer Marangoni-Bënard system of vapor-liquid
Liu QS(刘秋生); Liu R(刘荣); Zhu ZQ(朱志强); Yan JP; Chen SL
Source PublicationAIAA 57th International Astronautical Congress, IAC 2006
Conference NameAIAA 57th International Astronautical Congress, IAC 2006
Conference DateOctober 2, 2006 - October 6, 2006
Conference PlaceValencia, Spain
AbstractThe effects of liquid evaporation on the interfacial tension-induced convection and instability are studied theoretically and experimentally in present paper. The main purpose of this investigation is to understand the mechanism of convection instability in a thin vapor-liquid layer with a mass exchange surface (interface) where exists the coupling of evaporation phenomenon and Marangoni-Be´nard instability. A systematic model of two-layer system consisting of the evaporating liquid layer and vapor-phase layer, heated from below, is studied by linear instability analysis. The thickness of both layers is finite and each layer has an infinite extension in length. The top wall is assumed as a porous medium pervious to vapor, through which the gas phase is passed in a certain velocity in order to control the evaporation flux and vapor pressure. Deformable vapor-liquid interface in the perturbation state are considered, and the influence on the convection instability of the system are analyzed comparatively. Neutral stability curves of the two-layer system are presented for different cases, such as evaporation coefficient, evaporating mass flux, gravity, etc.
KeywordEvaporation Phenomenon Exchange Surfaces Linear Instability Analysis Vapor-liquid Layers
Indexed ByEI
Document Type会议论文
Recommended Citation
GB/T 7714
Liu QS,Liu R,Zhu ZQ,et al. Evaporative and convective instability in the two-layer Marangoni-Bënard system of vapor-liquid[C]AIAA 57th International Astronautical Congress, IAC 2006,2006.
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