Numerical Simulation of Droplets Interacting with a Microcolumnar Solid Structure

作     者：Liang Yang Tianle Xi Zhixing Wang 

作者机构：College of Mechanical EngineeringDalian Jiaotong UniversityDalian116028China 

出 版 物：《Fluid Dynamics & Materials Processing》 (流体力学与材料加工（英文）)

年 卷 期：2023年第19卷第6期

页      面：1585-1608页

核心收录：

学科分类：08[工学] 080103[工学-流体力学] 0705[理学-地理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：funding from the China Scholarship Council(CSC)and Basic Scientific Research Projects of Liaoning Provincial Department of Education:‘Design and manufacture of bionic antifogging surface of optical glass lens based on nanosecond laser’(LJKMZ20220827).Y received the grant. 

主　　题：Dynamic behavior mastoid microcolumn contact angle cavitation pressure 

摘      要：The VOF method is used to simulate the dynamics of a droplet interacting with a structure consisting of an array of microcolumns mounted on a flat surface.Such a specific configuration is intended to mimic the typical properties of lotus leaves,which typically display regularly arranged micron-scale papillary structures.After setting the initial velocity of the simulated droplet on the basis of practical considerations,an analysis is conducted about the effect of the characteristic size of the microstructure on the apparent contact angle.The pressure variation in the microstructure caves is also examined.The simulation results show that the change of the contact angle of the droplet in the quasi-static state is consistent with theoretical calculations and the contact angle in the dynamic state is smaller than that in the quasi-static state.Moreover,under dynamic conditions,the pressure fluctuation in the microstructure cave depends essentially on the characteristic size of the microstructure.