Dynamic characteristics of droplets impacting an inclined wall based on a front-tracking method

• DOI: 10.1063/5.0211388
• Publication Date: 2024-05-16T11:44:20Z
• Authors: Ying Zhang; Shuting Zhao; Yao Liu; Yuwei Tu; Zhaoqing Ke; Yuan Tian; Min Lu
• Keywords: Slipping; Dimensionless quantity

In the current study, dynamic characteristics of droplets impacting a hydrophilic/hydrophobic inclined wall are investigated using front-tracking method. The morphological and kinematic features examined across various contact angles (θ), low Weber numbers (We≤10), inclination (α). A sequence events, including deposition, spreading, contraction, rebound, subsequent re-spreading, is observed when droplet impacts hydrophobic wall, according to results. exhibits both small dimensionless spreading area (A*) significant fluctuation, along with noticeable slip on wall. As We increases, spread rebound effects become more pronounced, slipping velocity also increases. α becomes greater, A* tangential diameter (β) decrease. When hydrophilic continuous subtle inconspicuous observed. expands at an accelerating rate. Furthermore, wetting effect surfaces cannot be overlooked. Consequently, it shows that as there larger diffusion range longer film β. Such behaviors stand in contrast