A layering-sliding mesh method was developed to realize Reynolds boundary condition in three-dimensional Computational Fluid Dynamics (CFD) analysis of journal bearings. Hybrid dynamic mesh method and pseudo transient analysis were employed to locate the oil film rupture boundary. A numerical model of a full circular journal bearing was established to obtain the steady-state full-Sommerfeld solution. Using the solution as the initial condition, a pseudo transient analysis was performed. The axial boundary of maximum film thickness in the negative pressure region was specified as moving boundary. A dynamic layering method was employed to degenerate the mesh of the divergent clearance region along circumference, and a sliding mesh method was employed to locate the curvature of the moving boundary. The oil film rupture boundary was precisely captured through the criterion of local Reynolds boundary condition. The resulting oil film pressure was validated by comparison with the results of Reynolds equation and published works. The proposed method realized the Reynolds boundary condition in the Navier–Stokes approach. It is an alternative to other cavitation models.

开发了一种分层滑动网格方法，以在轴颈轴承的三维计算流体动力学 (CFD) 分析中实现雷诺边界条件。采用混合动力网格法和伪瞬态分析法定位油膜破裂边界。建立全圆形轴颈轴承的数值模型以获得稳态全索末菲解。使用该解决方案作为初始条件，进行了伪瞬态分析。将负压区最大膜厚的轴向边界指定为移动边界。采用动态分层方法对沿圆周发散间隙区域的网格进行退化，并采用滑动网格方法定位移动边界的曲率。通过局部雷诺边界条件判据精确捕捉油膜破裂边界。通过与雷诺方程的结果和已发表的作品进行比较，验证了所得油膜压力。所提出的方法实现了 Navier-Stokes 方法中的雷诺边界条件。它是其他空化模型的替代品。