双液滴在具有润湿梯度的斜面顶端融合弹跳的LBM模拟  

LBM Simulation of Two Droplets Merging and Bouncing at the Top of an Inclined Plane with a Wetting Gradient

作　　者：高明[1] 陈露 梁佳 王东民 赵玉刚 章立新[1] 孙泉 李昊杰 GAO Ming;CHEN Lu;LIANG Jia;WANG Dongmin;ZHAO Yugang;ZHANG Lixin;SUN Quan;LI Haojie(Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering,School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海市动力工程多相流动与传热重点实验室,上海理工大学能源与动力工程学院,上海200093

出　　处：《计算物理》2023年第3期333-342,共10页Chinese Journal of Computational Physics

基　　金：国家自然科学基金(51976127)资助项目。

摘　　要：基于格子Boltzmann方法,对液滴在具有润湿梯度的斜面顶端融合弹跳的过程进行模拟。研究润湿梯度、斜面顶端润湿性、液滴尺寸和Bond数对液滴融合弹跳过程的影响。计算结果表明:在较疏水的润湿梯度斜面上,两个液滴在非平衡张力作用下融合后能够发生弹跳行为;液滴融合速度和跳跃高度最大值均随着润湿梯度的增大而增加;随着斜面顶端润湿性的增大,液滴跳跃高度最大值减小;存在一个最佳液滴尺寸,使得跳跃高度最大值最优。Bond数越大,液滴跳跃高度最大值越小。Based on lattice Boltzmann method(LBM),the process of droplets merging and bouncing at the top of inclined plane with wetting gradient was simulated.The effects of wetting gradient,wettability at the top of inclined plane,droplet size and Bond number on droplet merging and bouncing process were investigated.The calculation results show that the two droplets can bounce when merged under the action of non-equilibrium tension on a hydrophobic gradient slope.Both the droplet fusion velocity and the maximum jump height increase with the increase of wetting gradient.The maximum droplet jump height decreases with the increase of the wettability of the inclined surface.There is an optimal droplet size that optimizes the maximum jump height.The larger the Bond number,the smaller the maximum droplet jump height.

关 键 词：格子BOLTZMANN方法 液滴 融合弹跳 润湿梯度 跳跃高度 

分 类 号：O359[理学—流体力学]