A new computational fluid dynamics method, the incompressible lattice Boltzmann method (LBM) is utilized to simulate fluid flow of the infinitely wide wedge in this paper. Compared with the traditional method, LBM is a mesoscopic scale method and some characteristics can be described more clearly with LBM. In this article, three kinds of model .i.e. linear type, parabolic type and harmonic type wedge models are built. The streamline and velocity contour in the fluid field are described. The pressure distribution of different types wedge is studied in LBM. The results manifest that, for the same bottom boundary velocity, the parabolic type and harmonic type wedges are easy to form a vortex, and the load capacity in the harmonic type wedge model is the largest. This paper is ready to investigate the microscopic lubrication mechanism of journal bearing in the future.

中文翻译：

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基于格子Boltzmann方法的无限宽楔形流数值研究

本文采用一种新的计算流体动力学方法——不可压缩格子玻尔兹曼方法(LBM)来模拟无限宽楔子的流体流动。与传统方法相比，LBM 是一种细观尺度方法，LBM 可以更清楚地描述一些特征。本文建立了三种模型，即线性型、抛物线型和谐波型楔形模型。描述了流体场中的流线和速度等值线。在LBM中研究了不同类型楔块的压力分布。结果表明，对于相同的底部边界速度，抛物线型和谐波型楔子容易形成涡流，谐波型楔子模型的承载能力最大。