Topographic variation and fluid flow characteristics in rough contact interface
作者机构：Institute of TribologySchool of Mechanical EngineeringHefei University of TechnologyHefei 230009China
出 版 物：《Friction》 (摩擦（英文版）)
年 卷 期：2024年第12卷第12期
页 面：2774-2790页
核心收录：
学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
基 金：supported by the National Natural Science Foundation of China(Nos.52375178,52305188,51975174,51875153,and 51805508) the Natural Science Foundation of Anhui Province(Nos.2308085ME158 and 2308085QE156)
主 题：rough contact interface fluid flow topography evolution microchannel in-situ observation
摘 要：Understanding flow characteristics of fluid near rough contact is important for the design of fluid-based lubrication and basic of tribology *** this study,the spreading and seepage processes of anhydrous ethanol in the interface between glass and rough PDMS are observed by a homemade optical in-situ *** image processing technology and numerical simulation software are adapted to identify and extract the topological properties of interface and thin fluid flow *** attention is paid to the dynamic evolution of the contact interface morphology under different stresses,the distribution of microchannels in the interface,the spreading characteristics of the fluid in contact interface,as well as the mechanical driving *** surface morphology and the contact stress have a significant impact on the interface topography and the distribution of interfacial microchannels,which shows that the feature lengths of the microchannels,the spreading area and the spreading rate of the fluid are inversely proportional to the *** the flow path of the fluid in the interface is mainly divided into three stages:along the wall of the island,generating liquid bridges,and moving from the tip side to the root side in the wedge-shaped *** main mechanical mechanism of liquid flow in the interface is the equilibrium between the capillary force that drives the liquid spreading and viscous resistance of solid wall to *** addition,the phenomenon of“trapped airoccurs during the flow process due to the irregular characteristics of the *** study lays a certain theoretical foundation for the research of microscopic flow behavior of the liquid in the rough contact interface,the friction and lubrication of the mechanical system,and the sealing mechanism.
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