采用伪势格子玻尔兹曼方法 ( LBM) 多相流模型对均质表面上液滴脱落临界直径与壁面润湿性的关系以及非均质表面上液滴聚合脱落现象进行了研究，分析了液滴尺寸、壁面润湿性的差异、液滴半径比对非均质表面液滴聚合脱落的影响。结果表明: 非均质表面在一定程度上可以诱导相应尺寸大小的液滴聚合并脱落，可通过增大中间区域的接触角来扩大非均质表面诱导聚合脱落液滴的尺寸范围; 非均质表面接触角差值越大，液滴聚合速度越快，同时液滴在壁面上的铺展能力越强，液滴纵向振荡幅度越小;在一定范围内，液滴半径比越大，两液滴的内部压力差越大，融合速度越快，液滴可获得额外的动能并从壁面上脱落。

The relationship between the critical diameter of droplet drop and the wall wettability on the homogene- ous surface，and the drop phenomenon of droplet polymerization on the heterogeneous surface，were studied with the pseudo-potential lattice Boltzmann method ( LBM) multiphase flow model． The influence of droplet size，wall wettability，and droplet radius ratio on the polymerization and drop of droplets on the heterogeneous surface was ana- lyzed． The results show that: ( 1) The heterogeneous surface，to a certain extent，can induce droplets of corre- sponding size to polymerize and drop． In addition，the size range of the droplets can be expanded by increasing the contact angle in the middle region． ( 2) The bigger the difference of the contact angle ( Δθ) of the heterogeneous surface，the faster the droplets polymerize，and the stronger the spreading ability of the droplet on the wall surface become，the smaller the longitudinal oscillation amplitude． ( 3) Within a certain range，the larger the radius ratio of droplets，the larger the internal pressure difference between the two droplets，and the faster the two droplets polymerize，and the droplet can gain additional kinetic energy and fall off the wall surface．