关于动静液滴聚结诱导跳跃的数值模拟

Numerical Simulation of Jump Induced by Coalescence of Static and Static Droplets

为了探究初始速度和液滴之间约束点对运动液滴和静态液滴聚结引起的液滴跳跃的影响,我们采用单向有限元模型进行了模拟,并结合实验验证了仿真结果。结果表明:移动液滴的初始速度加速了跳跃过程中液滴变形,随着移动液滴的初速度增加,弹跳速度减小;随着约束点高度增加,弹跳速度增加。聚结液滴总动能的主要来源从释放的表面能转变为运动液滴的初始动能,但弹跳动能占总动能的比例减小。此外,移动液滴的初始速度加剧了液滴变形,加速了聚结诱导跳跃的过程,但是抑制了跳跃高度,而约束点促进了液滴的弹跳。这项工作将为液滴跳跃行为带来新的见解,并促进其在相关领域的应用。

In order to explore the effect of the initial velocity and the constraint point between droplets on the droplet jump caused by the agglomeration of moving droplets and static droplets, a one-way finite element model was used to simulate the droplet jump, and the simulation results were verified by experiments. The results show that the initial velocity of the moving droplet accelerates the droplet deformation during the jumping process, and the bouncing velocity decreases with the increase of u0 of the moving droplet. As the height of the constraint point increases, the bounding speed increases. The main source of total kinetic energy of the coalesced droplet changes from the released surface energy to the initial kinetic energy of the moving droplet, but the proportion of bouncing kinetic energy in total kinetic energy decreases. In addition, the initial velocity of the moving droplet increases the droplet deformation, and accelerates the coalescence-induced jump process, but inhibits the jump height, while the constraint point promotes the droplet bounce. This work will bring new insights into droplet jumping behavior and promote its application in related fields.