中文摘要：

用格子Boltzmann方法中的伪势模型对两个液滴的合并过程进行了数值模拟。详细研究了两液滴能否合并临界尺寸和液滴合并过程中液桥的形成与演化的关系，并研究了表面张力对合并速度的影响。研究结果发现当两个液滴之间距离小于2倍界面厚度时，两个液滴在不受外力的作用下能够自动合并；液桥的宽度与演化时间有一定的指数关系；表面张力越大，合并速度越快，这个结果与前人的理论预测和实验结果一致。

英文摘要：

The lattice Boltzmann potential model was used to simulate the droplets coalescence process. It was found that if the gap width between two static droplets was less than twice of interface width, these two droplets would merge together. During the coalescence process there will form a liquid bridge due to the surface tension, and the width of the bridge has a power-law dependence on time. The surface tension force affects the coalescence speed. The bigger the surface tension, the higher the coalescence speed. These results are in consistency with Eggers et al.＇s prediction and the experimental results.