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Isoviscous elastohydrodynamic lubrication of inelastic Non-Newtonian fluids

机译:无弹性非牛顿流体的氨化件弹性动力学润滑

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摘要

We simulate the thin-film and frictional properties of shear-thinning and shear-thickening fluids in the isoviscous elastohydrodynamic (I-EHL) regime in point contacts. A double-Newtonian Carreau-Yasuda viscosity model is employed to incorporate the shear rate dependence of the viscosity. Regression formulas for the film thickness and friction coefficient are proposed for both non-Newtonian fluids. A master curve is proposed by using the product between the entrainment speed and the effective viscosity in the contact. Numerical results are satisfactorily compared with experimental data in xantham gum solutions and fumed silica suspensions in the form of Stribeck curves.
机译:我们在点触点中模拟剪切变薄和剪切增稠液中的剪切变薄和剪切增稠液的薄膜和摩擦性能。 采用双牛顿的arteau-yasuda粘度模型掺入粘度的剪切速率。 为非牛顿流体提出了膜厚度和摩擦系数的回归公式。 通过使用夹带速度与接触中的有效粘度之间的产品提出了主曲线。 与黄原胶溶液中的实验数据和STRIBECK曲线形式的烟雾二氧化硅悬浮液相比,令人满意的数值结果。

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