水润滑轴承微观界面流场特性的数值模拟

为了研究水润滑高分子材料轴承的微观界面的流场特性,本文以单个微凹体中的流场作为研究对象,建立了单个微凹体流动模型。采用多松弛格子玻尔兹曼方法MRT-LBM (multi-relaxation time lattice Boltzmann method)对单个微凹体的流体流动问题进行数值模拟。研究了流场中速度的变化规律,以及流场中流线分布随雷诺数的变化规律。结果表明当雷诺数较低时,流场处于稳定性流动状态；当雷诺数达到一定程度时,流场处于周期流动状态；当雷诺数很高时,流场处于湍流运动状态。探究微观流场中复杂的变化规律,为研究水润滑高分子材料轴承的润滑和摩擦性能提供一些理论支撑。

Numerical Simulation of Flow Field Characteristics of Microscopic Interface of Water-Lubricated Bearing

To investigate the flow field characteristics at the microscopic interface of water-lubricated polymer bearings, the flow field in a single microscopic dimple was taken as the research object, and the flow model in a single microscopic dimple was established. MRT-LBM (Multi-Relaxation Time Lattice Boltzmann Method) was used to simulate the fluid flow of single microscopic dimple. The variations of velocity and streamline distribution with Reynolds number in flow field were analyzed. The results show that, when Reynolds number is low, the flow field is in a stable flow state. When Reynolds number reaches a certain level, the flow field is in a periodic flow state. When Reynolds number is very high, the flow field is in turbulent motion. To explore the complex characteristics in microscopic flow field can provide some theoretical support for the study of lubrication and friction performance of water-lubricated polymer bearings.