Experimental Study on Hydrodynamic Behavior of Falling Film over Vertical Tube

作     者：YUE Yunkai ZHANG Zhentao ZHANG Hailun YANG Junling LI Xiaoqiong ZHANG Yu 

作者机构：Key Laboratory of CryogenicsTechnical Institute of Physics and ChemistryChinese Academy of SciencesBeijing100190China University of Chinese Academy of SciencesBeijing100049China Key Laboratory of Technology on Space Energy ConversionTechnical Institute of Physics and ChemistryChinese Academy of ScienceBeijing100190China 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2023年第32卷第4期

页      面：1512-1522页

核心收录：

学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：This work was supported by National Key Research and Development Program of China(No.2020YFF0303902) the National Natural Science Foundation of China(No.51876216 and No.21978308) Special Fund for Central Guiding Local Science and Technology Development(ZYYD2022B11,2022ZY0048) 

主　　题：falling film film distributor Marangoni effect film thickness 

摘      要：Falling film configurations play an important role in characterizing the heat transfer due to changes in hydrodynamic *** purpose of this study is to establish a novel film distributor to investigate the hydrodynamic behavior of the falling film on the vertical *** falling film thickness and flow patterns on the vertical tube were analyzed at a feed water temperature of 30℃ for film Re ranged from 53 to 4544 and the heat fluxes ranged from 1.33 to 49.45 kW/m^(2).The correlation between the average falling film thickness and the film Re was fitted;the maximum deviation between the experimental data and the predicted values was 7.58%.Additionally,the film thickness changed sharply when the heat flux increased to a certain *** the further increase of the heat flux,dry patches appeared on the surface of the experimental *** was Marangoni effect on vertical tube and the falling film thickness and flow patterns were significantly affected by *** interval value of the critical heat flux with film Re was *** with the porous film distributor reported in the literature,the critical heat flux of the new film distributor increased by 3.72%-56.95%.