固体接触界面微通道流体流动特性研究

Study on Fluid Flow Characteristics of Microchannel at Solid Contact Interface

建立了固体接触界面间层流流动模型,研究了不可压缩粘性流体在无规则微通道中的流动特性。该模型通道为二维、三维模型,用无规则微凸体模拟了微通道内的界面结构形式,定义了宽高比、长度比等物理量。分析了他们对流体流动的速度、压力的影响。模拟仿真结果表明微通道内微凸体的速度、压力随微凸体占微通道的面积比的增大而增大,微凸体的长度不是影响流体流动的主要因素,微凸体的结构形式是影响微通道流体流动的重要因素。研究结果可为固体表面形貌设计奠定一定理论基础。

In this chapter,the laminar flow model between solid contact interfaces is established,and the flow characteristics of viscous fluid in irregular microchannels are studied.The channel of the model is a two-dimensional and three-dimensional model.The interface structure in the microchannel is simulated with irregular micro convex body,and the physical parameters such as aspect ratio and area ratio are defined.Driven by the velocity,the influence of them on the velocity and pressure of fluid flow is analyzed.The simulation results show that the velocity and pressure of the micro-convex body in the micro-channel increase as the ratio of the micro-convex body to the area of the micro-channel increases.The length of the microconvex body is not the main factor affecting the fluid flow.The structure of the micro-convex body is an important factor affecting the fluid flow of the micro-channel.The research results can lay a certain theoretical foundation for the design of solid surface morphology.