Effects of surface-active agents on mass transfer inside drops
Effects of surface-active agents on mass transfer inside drops
复制标题
表面活性剂对液滴内传质的影响
DOI：
10.1016/0009-2509(79)87007-4
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发表时间：
1979
影响因子：
4.7
通讯作者：
H. Angelino
中科院分区：
文献类型：
--
作者：
L. Mekasut;J. Molinier;H. Angelino
在Teepol和十二烷基硫酸钠两种表面活性剂存在下，研究了碘从四氯化碳滴入水中的转移。Teepol的存在下，发现降低液滴的终端速度比十二烷基硫酸钠，这种效果是更明显的较大的下降。少量的这些表面活性剂会降低内循环，从而降低传质速率。当表面活性剂浓度高时，效果甚至可以低于刚性球体的效果。两种表面活性剂的单个传质系数的最大降低约为77%。与Vermeulen模型和Calderbank和Korchinski模型的结果进行了比较。这些结果也用伽利略数和扩散系数有效因子R表示。
The transfer of iodine from a drop of carbon tetrachloride falling in water has been studied in the presence of two surface-active agents, Teepol and sodium dodecylsulfate. The presence of Teepol is found to decrease the drop's terminal velocity more than that of sodium dodecylsulfate, this effect being more pronounced for larger drops. Small amounts of these surfactants reduce the internal circulation and consequently the mass transfer rates. Efficiencies can even fall below those for rigid spheres when the surfactant concentration is high. The maximum reduction for the individual mass transfer coefficient is about 77% with both surface-active agents. Results are compared with the model of Vermeulen and the model of Calderbank and Korchinski. These results are also expressed using the Galileo number and diffusivity effective factor R.