Experimental analysis of the interactions between approaching surfaces in a multiphase system with impurities

实验研究了气泡-气泡和气泡-壁面相互作用对泡状流流动结构的控制作用下，界面间形成的薄液膜的排出过程和破裂，以及二维平面运动约束下球形气泡的聚集行为。在刚性表面与恒速接近气泡表面之间形成的薄液膜的行为上，水中的表面活性剂和电解质等杂质对膜的滤水和破裂有很大的影响和避免，并对其随时间演化的厚度分布进行了定量评估。另一方面，无论气泡表面的无滑移边界条件和自由滑移边界条件如何，在倾斜平板下升起的球形气泡的聚集行为都有类似的现象。

The drainage process and the rupture of a thin liquid film formed between interfaces and the clustering behavior of spherical bubbles with the constraint of motions in two-dimensional plain, which govern the fluid structure of bubbly flows through bubble-bubble and bubble-wall interactions, have been investigated experimentally. On the behavior of the thin liquid film formed between a rigid surface and an approaching bubble surface with a constant speed, the impurities such as surfactants and electrolytes in water greatly affect and avoid the drainage and rupture of the film, and the quantitative evaluation of their time evolutional thickness distributions has been done. On the other hand, similar phenomena for the clustering behaviors of the spherical bubbles rising under an inclined flat plate have been clarified regardless of no-slip and free-slip boundary conditions of the bubble surface.