论文标题
两个液滴的不对称结合具有不同的表面张力，是由毛细管波引起的
The asymmetric coalescence of two droplets with different surface tensions is caused by capillary waves
论文作者
论文摘要
当两个具有不同表面张力的液滴碰撞时，合并液滴的形状演化是不对称的。使用实验和数值技术，我们揭示了这种不对称性是由不对称毛细血管波引起的，这是液滴的不同表面张力的结果。我们表明，通过增加表面张力差来增强不对称性，并通过增加碰撞液滴的惯性抑制。此外，我们研究了无惯性的极限的毛细管波。我们揭示了不对称性不是由Marangoni力直接引起的。实际上，Marangoni效应以某种方式强烈降低了违反直觉的不对称性。相反，与液滴的不同表面张力相关的不同固有毛细管幅度和速度位于液滴合并期间的不对称起源。
When two droplets with different surface tensions collide, the shape evolution of the merging droplets is asymmetric. Using experimental and numerical techniques, we reveal that this asymmetry is caused by asymmetric capillary waves, which are the result of the different surface tensions of the droplets. We show that the asymmetry is enhanced by increasing the surface tension difference, and suppressed by increasing the inertia of the colliding droplets. Furthermore, we study capillary waves in the limit of no inertia. We reveal that the asymmetry is not directly caused by Marangoni forces. In fact, somehow counterintuitive, asymmetry is strongly reduced by the Marangoni effect. Rather, the different intrinsic capillary wave amplitudes and velocities associated with the different surface tensions of the droplets lie at the origin of the asymmetry during droplet coalescence.
