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首页> 外文会议>International Conference on Engineering Tribology Technology >Surface Roughness Effects on Fluid Flow between Two Rotating Cylinders
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Surface Roughness Effects on Fluid Flow between Two Rotating Cylinders

机译：表面粗糙度对两个旋转汽缸之间的流体流动的影响

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In general, the thin fluid film problems are explained by the classical Reynolds equation, but this approach has some limitations. To overcome them, the method of Computational Fluid Dynamics (CFD) is used in this study, as an alternative to solving the Reynolds equation. The characteristics of the two cylinders contact with real surface roughness are investigated. The CFD model has been used to simulate the behavior of the fluid flows at the conjunction between two different radius cylinders. The non-Newtonian fluid is employed to calculate the lubricant viscosity, and the thermal effect is also considered in the evaluation of the lubricant properties. The pressure distributions, the fluid film thickness and the temperature distributions are investigated. The obtained results show clearly the significance of the surface roughness on the lubricant flow at the contact center area. The fluctuated flow also affects the pressure distribution, the temperature and the lubricant viscosity in a similar pattern to the rough surface profile. The surface roughness effect will decrease when the film thickness is increased.
机译：通常，经典雷诺方程解释薄的流体膜问题，但这种方法具有一些限制。为了克服它们，在该研究中使用计算流体动力学（CFD）的方法，作为求解雷诺方程的替代方案。研究了两个气缸与真实表面粗糙度接触的特性。 CFD模型已被用于模拟在两个不同半径滚筒之间的结合的流体流动的行为。使用非牛顿流体来计算润滑剂粘度，并且在评估润滑剂性质时也考虑了热效果。研究了压力分布，流体膜厚度和温度分布。所得结果显然表明了接触中心区域润滑剂流动对润滑剂流动的显着性。波动的流量也影响与粗糙表面轮廓相似的图案中的压力分布，温度和润滑剂粘度。当膜厚度增加时，表面粗糙度效应将减小。

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