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首页> 美国政府科技报告 >Heating and Evaporation of Turbulent Liquid Films: Measurement of Film Thickness and the Onset of Nucleate Boiling: Annual Progress Report
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Heating and Evaporation of Turbulent Liquid Films: Measurement of Film Thickness and the Onset of Nucleate Boiling: Annual Progress Report

机译：湍流液膜的加热和蒸发：膜厚度的测量和核沸腾的开始：年度进展报告

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The hydrodynamics of liquid films has been a subject of intense interest in the design of process equipment. Many chemical reaction chambers introduce liquid reactants in the form of films on the walls of a vessel. Liquid films are also commonly encountered in heat exchangers. For example, in process condensers, a vapor condenses and forms a liquid film on a solid surface. Great interest has developed in recent years in plate type condensers and evaporators. These heat exchangers consist of a number of parallel vertical plates. The fluid to be heated and the liquid to be cooled flow in the form of liquid films in the spaces between alternating plates. As the design is simple, these devices are efficient to construct;however, the thermal design of the equipment is still empirical. One special case of liquid films that is commonly encountered in industrial processes is the free-falling film on a vertical surface. This case is of interest not only because it is often used, but also because it is a limiting case of the much broader problem of shear driven film flows. A number of investigations of falling films have been conducted;however no one has been able to model fully the interfacial disturbances. The general purpose of this study is to develop a better understanding of the fluid mechanics of falling liquid films. (ERA citation 13:029349)

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