Asymmetric coalescence of two droplets with different surface tensions is caused by capillary waves

When two droplets with different surface tensions collide, the shape evolution of merging is asymmetric. Using experimental and numerical techniques, we reveal that this asymmetry caused by asymmetric capillary waves, which are result droplets. We show enhanced increasing tension difference, suppressed inertia colliding Furthermore, study waves in limit no inertia. not directly Marangoni forces. In fact, somehow counterintuitive, strongly reduced effect. Rather, intrinsic wave amplitudes velocities associated lie at origin during droplet coalescence.