关键词: 降液膜, 流动不稳定性, 传热, 传质, 聚合, 反应工程

Abstract: Owing to high heat and mass transfer coefficient，large gas-liquid contact area and quick surface renewal，the falling liquid film flows on vertical structure can be used in chemical and polymerization reaction engineering. Experimental investigation，theoretical analysis and numerical simulation of falling liquid film flows on vertical structure are reviewed. The application of falling liquid film of low viscosity fluid in chemical engineering and falling film of high viscosity fluid used in polymerization reaction are introduced respectively. The falling liquid film flows of low viscosity fluid are more intensely investigated，while the study on high viscosity fluid only concerns film formation. The paper proposes the possible trends of falling liquid film. Falling liquid film flows of high viscosity fluid on vertical structure which involves the transfer of heat and mass coupled with chemical reaction will be the focus of future research.

Key words: falling liquid film, flow instability, heat transfer, mass transfer, polymerization, reaction engineering