Research of Fluid Flow Characteristics forSurface Morphology of Solid

Abstract

A large number of asperities have been left on the solid surface after mechanical processing. Aiming at this complex shape, a laminar flow model between solid contact interfaces is established, and the irregular concavo-convex structure is used to simulate the interface structure in micro-channels, then it is studied for the flow characteristics of incompressible viscous fluids in random micro-channel. The channel of model adopts the form of 2D and 3Dmodel. The interface structure in the microchannel is simulated with irregular micro-convex bodies, and physical quantities such as aspect ratio and length ratio are defined. It is used to analyze the influence of micro-channel on the velocity and pressure of fluid flow by Computer simulation technology. The velocity andpressure of the fluid in the microchannel increase as the area ratio of the micro-convex to the micro-channel increases, the length of the micro-protrusion is not the main factor affecting the fluid flow characteristics, the structure of the micro-convex is is one of the key factor affecting the fluid flow characteristics, they are showed by the simulation results. This research provides certain guidance and reference for solid surface design.