中文摘要：

对水平均质表面上非等直径水滴的聚合过程及特性进行可视化实验研究，获得了其聚合过程中水滴液桥半径、接触角和接触线的变化特性和规律，并与等直径水滴聚合进行了比较。结果表明，非等直径水滴聚合后的液桥半径的振幅小，接触角小，接触线的收缩与扩张幅度较大。

英文摘要：

The phenomena and behaviors of the coalescence of two non-equal-size water droplets on horizontal homogeneous surface were experimented visually. The variations of the liquid bridge radius, the contact angle and contact line of water droplets with coalescence time were analyzed and measured for coalescence of two non-equal-size water droplets, and compared to that of the equal-size water droplets. The results show that the amplitude of the liquid bridge radius is lower, and the contact angle is smaller, but the range of contact line＇s movement is larger than the equal-size water droplets in coalescence of non-equal-size water droplets.