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首页> 外文会议>World Tribology Congress III vol.1; 20050912-16; Washington,DC(US) >NUMERICAL ANALYSIS ON THE EFFECT OF TRANSVERSE SURFACE ROUGHNESS IN NON- NEWTONIAN FLUID LUBRICATION
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NUMERICAL ANALYSIS ON THE EFFECT OF TRANSVERSE SURFACE ROUGHNESS IN NON- NEWTONIAN FLUID LUBRICATION

机译：横向表面粗糙度对非牛顿流体润滑影响的数值分析

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摘要

To analyze non-Newtonian fluid lubrication with the effect of large surface roughness amplitude, Navier-Stokes equation is used and a finite volume method is adopted to acquire the lubrication results of an inclined slider model. The numerical results show that the pressure mutation occurs at the edges of surface roughness. When the roughness height is more than 1% lubricant thickness, the surface roughness takes an obvious effect on the lubrication results. The pressure drag increase as the roughness height increases, the friction drag decreases and the total drag force keeps constant. When the roughness height is more than 10% lubricant thickness, the friction force begins to increase and the total drag force increases rapidly. Non-Newtonian fluid affects the lubrication results more greatly than the surface roughness height does, but it does not affect the variation process caused by different surface roughness.
机译：为了分析具有较大表面粗糙度幅值的非牛顿流体润滑，使用了Navier-Stokes方程，并采用有限体积法获得了倾斜滑块模型的润滑结果。数值结果表明，压力突变发生在表面粗糙度的边缘。当粗糙度高度大于润滑剂厚度的1％时，表面粗糙度对润滑效果有明显的影响。压力阻力随着粗糙度高度的增加而增加，摩擦阻力减小并且总阻力保持恒定。当粗糙度高度超过润滑剂厚度的10％时，摩擦力开始增加，总阻力迅速增加。非牛顿流体比表面粗糙度高度对润滑效果的影响更大，但不影响由不同表面粗糙度引起的变化过程。

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