One of the most widely used components in industrial rotary machines is the plain journal bearings. These components consist of a rotating shaft, which is separated from the outer sheath by a thin layer of lubricant and rotated in it. In this research, the journal bearings are investigated numerically in three dimensions using ANSYS-FLUENT software. To have a more realistic analysis, the cavitation, which is a common event in bearings, is simulated. The Eulerian two-phase model along with Zwart–Gerber–Belarmi method is used to simulate the cavitation phenomena. In addition, the changes in fluid viscosity due to the temperature and pressure have been considered in calculations. Moreover, the effect of the viscous dissipation term is considered that leads to a change in fluid temperature. Simulations are conducted for two angular velocities of 48 and 68 [rad/s] as well as two eccentricity ratios of 0.6 and 0.8. The comparison of the results with other numerical and experimental data shows the accuracy of the two-phase model and conducted settings in the software. The results show that the consideration of cavitation along with the viscosity changes have a significant impact on the pressure distribution, cavity volume, and load-bearing capacity.

工业旋转机械中使用最广泛的部件之一是滑动轴承。这些部件由一个旋转轴组成，它通过一层薄薄的润滑剂与外护套隔开并在其中旋转。在这项研究中，使用 ANSYS-FLUENT 软件在三个维度上对轴颈轴承进行了数值研究。为了进行更真实的分析，模拟了轴承中常见的气穴现象。欧拉两相模型以及 Zwart-Gerber-Belarmi 方法用于模拟空化现象。此外，计算中还考虑了由于温度和压力引起的流体粘度变化。此外，粘性耗散项的影响被认为会导致流体温度的变化。对 48 和 68 [rad/s] 的两个角速度以及 0.6 和 0.8 的两个偏心比进行了模拟。结果与其他数值和实验数据的比较显示了两相模型和软件中进行设置的准确性。结果表明，考虑空化和粘度变化对压力分布、空腔容积和承载能力有显着影响。