摘要
The interplay between chemistry and interfacial-tension-driven hydrodynamic instabilities has been studied experimentally. The system on hand consists of two immiscible liquids separated along an initially plane interface at which an interfacial reaction takes place to produce in situ a surfactant. It is identified that the dynamics of the system depends on the orientation of the Hele-Shaw cell with respect to the vector of gravity. If the nele-Shaw cell is placed vertically, Marangoni cells with vigorous convection develop in both phases along a nearly planar interface. However, if the Hele-Shaw cell is tilted off the gravity, the instabilities in the system are characterized by the large scale interracial deformation with a spatio-temporal periodicity together with the chemo-Marangoni convection. The focus is on the exploration of the transition from the cellular mode to the large scale interfacial deformation.
在化学和 interfacial-tension-driven 水动力学不稳定性之间的相互影响试验性地被学习了。系统手头上由分开的二不能混合的液体组成一开始界面的反应在发生在 situ 生产表面活化剂的飞机接口。系统的动力学关于严肃的向量取决于 Hele 杂木林房间的取向，这被识别。如果 Hele 杂木林房间垂直地被放，有精力旺盛的传送对流的 Marangoni 房间沿着一个将近平面的接口在两个阶段发展。然而，如果 Hele 杂木林房间被倾斜离开严肃，在系统的不稳定性被大规模描绘有和 chemo-Marangoni 传送对流的时间空间的频率的界面的变丑。焦点在从细胞的模式的转变的探索上到大规模界面的变丑。
基金
Deutsche Forschung Gemainschaft(Ec/201/1-5)
Deutsches Zentrum fuer Luft und Raumfahrt(50WM0058).
