＜正＞The Marangoni effect driven by interfacial tension gradients due to interfacial concentration or heat varia...
Zhihui Wang~1,Yumei Yong~1,Guangji Zhang~1, ChaoYang~(1,2),Zaisha Mao~1 1 Key Laboratory of Green Process and Engineering,Institute of Process Engineering,Chinese Academy of Sciences,China
在内径160 mm,高300 mm 的玻璃槽中,采用0～200 W 可调功聚能型超声波发生器研究了超声波功率、聚能头与进气管距离、聚能头放置方式、聚能头投入深度、进气流量和反射室直径等因素对气液鼓泡流中气泡发生频率的影响。实验结果表明,聚能头竖直放置时,随着功率的增加,单位时间内气泡数目先减少而后急剧增加;聚能头水平放置时,单位时间内气泡数目随着功率增加而增加;聚能头距分布管越远,超声波对气泡的破碎作用越小,气体流量越大,单位时间内气泡数目越多,反射室直径在一定范围内越小,单位时间内气泡数目越多。
The mathematical model of mass transfer-induced Marangoni effect is formulated. The drop surface evolution is captured by the level set method, in which the interface is represented by the embedded set of zero level of a scalar distance function defined in the whole computational domain. Numerical simulation of the Marangoni effect induced by interphase mass transfer to/from deformable single drops in unsteady motion in liquid-liquid extraction systems is performed in a Eulerian axisymmetric reference frame. The occurrence and development of the Marangoni effect are simulated, and the re- sults are in good agreement with the classical theoretical analysis and previous simulation.
