Coalescence-induced jumping motion of droplets on superhydrophobic surfaces has potential applications for anti-icing, self-cleaning and anti-fogging, etc. In the present study, the coalescence-induced jumping of mesoscale water droplets on substrate without and with beam is investigated by using many-body dissipative particle dynamics (MDPD) simulations. For the cases of jumping on flat substrate without beam, the jumping velocity scaled by the inertial-capillary velocity ($v_{ic}$) is nearly constant at 0.105 for droplet radius varying from 116.04 nm to 290.10 nm. For coalescence-induced jumping on substrate with a beam, the jumping velocity can be enhanced to $0.7v_{ic}$, and the jumping is accompanied by the merging process, which is different from that of the droplets merging on substrate without beam. The stages of merging on substrate with a beam can also be divided into 4 stages : I. expansion of liquid bridge; II. detaching from substrate; III. jumping away from beam; IV. moving freely in air. The conversion efficiency of jumping kinetic energy increases with the beam height in the range from zero to the radius of droplet. Hydrophobic and hydrophilic beams lead to coalesced droplets standing on the beam or wrapping the beam. Our work can provide new insights in the droplets coalescence dynamics, and help design water resource collection system and microfluidics devices.

在超疏水表面上聚结引起的水滴跳跃运动在防冰、自清洁和防雾等方面具有潜在的应用。通过使用多体耗散粒子动力学（MDPD）模拟。对于在没有光束的平面基板上跳跃的情况，跳跃速度由惯性 - 毛细管速度（$v_{\mathrm{一世}C}$) 对于从 116.04 nm 到 290.10 nm 的液滴半径几乎恒定在 0.105。对于用光束在基板上引起的聚结跳跃，跳跃速度可以提高到$0.7v_{\mathrm{一世}C}$，并且跳跃伴随着合并过程，这与没有光束的液滴在基板上合并的过程不同。用梁在​​基板上合并的阶段也可以分为4个阶段：I.液桥扩展；二、从基板上分离；三、跳离光束；四。在空气中自由移动。在从零到液滴半径的范围内，跳跃动能的转换效率随着光束高度的增加而增加。疏水性和亲水性光束导致聚结的液滴站在光束上或包裹在光束上。我们的工作可以为液滴聚结动力学提供新的见解，并帮助设计水资源收集系统和微流体装置。