Schlieren Visualization of M arangoni Effect in Gas-Liquid Systems  

作　　者：余黎明 曾爱武 余国琮 

机构地区：[1]State Key Laboratory of Chemical Engineering School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

出　　处：《Transactions of Tianjin University》2006年第4期235-241,共7页天津大学学报（英文版）

基　　金：Supported by National Natural Science Foundation of China(No. 20136010).

摘　　要：This paper is focused on the Marangoni effect in the gas-liquid mass transfer systems. A series of experiments were conducted to observe Marangoni effect by a laser Schlieren system. Experimental investigations of the occurrence of Marangoni convection were presented. The typical polygonal patterns and even the reaching of chaotic interfacial flow were observed. The visual evidences were discussed and the characteristic time and scale of Marangoni convection were obtained approximately as 0. 5 s and 1 mm according to the Schlieren images. From the perspective of hydrodynamic instability, the mechanism of the Marangoni convection was investigated. Though many external factors have influence on the interfacial instability, the local surface-tension gradient is the primary reason for the Marangoni convection. The small-scale interfacial flow increases the surface renewal rate. Consequently. due to the occurrence of the Marangoni effect, the mass transfer rate can be significantly enhanced.这篇论文在煤气液体的质传系统集中于 Marangoni。一系列实验被进行由激光 Schlierensystem 观察 Marangoni。Marangoni 传送对流的出现的试验性的调查被介绍。Thetypical 多角形的模式并且甚至，到达混乱界面的流动被观察。Thevisual 证据被讨论， Marangoni 传送对流的典型时间和规模根据 Schlieren 图象作为 0.5 s 和 1 公里近似被获得。从水动力学不稳定性的观点， Marangoni 传送对流的机制被调查。尽管许多外部因素在界面的不稳定性上有影响，本地表面紧张坡度是为 Marangoni 传送对流的主要原因。小规模的界面的流动增加表面更新率。由于 Marangoni 的出现，因而，质传率能显著地被提高。

关 键 词：mass transfer Schlieren system MARANGONI gas-liquid systems 

分 类 号：O35[理学—流体力学]