| 3 | Droplet impact on a wettability-patterned woven mesh显示文摘Droplet impact and breakup on meshes are relevant to a number of applications involving filters,textiles,and other spatially inhomogeneous media encountering gasdispersed liquids.This study presents high-resolution simulation results of mm-size droplets striking wettability-patterned meshes with the goal of(a)replicating prior physical experiments,(b)identifying sensitivities to the initial conditions and wettability of the mesh wires,and(c)studying the fluid-field dynamics when droplets strike such meshes.The insights from the present model may help to advance understanding of droplet atomization on meshes,which depends on a number of parameters that are nontrivial to control in an experimental setting.The analysis is carried out by benchmarking the numerical methods used in a commercial software package for orthogonal droplet impact on a flat smooth surface,followed by a convergence analysis,and finally,simulation of specific experiments and case studies involving wettability-patterned mesh targets.We show that the wettability contrast between the hydrophilic and hydrophobic domains on the mesh as well as the contact angle hysteresis on each side play a critical role in determining whether liquid pinchoff occurs.The three-dimensional computational framework constructed in this work is a step toward predicting the postimpact behavior of droplets that strike woven meshes and other porous inhomogeneous media consisting of materials with different wetting properties. | Sotiris Catsoulis Uddalok Sen Jens H.Walther Constantine M.Megaridis | 2023 | Droplet2023，2，3： | 0 |
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