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Interface slip and the buildup of hydrodynamic pressure in nanoscale bearings

机译:纳米级轴承的界面滑移和流体动压的建立

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摘要

A new type of hydrodynamic bearing is presented. Instead of physically forming a wedged space by two plates, the bearing consists of two parallel plates, with regions of different wettability on one of the surfaces. With the introduction of such a wettability-patterned surface, the hydrodynamic pressure can be built up because the local slip length over different regions in the bearing is different and results in similar velocity profiles to that in a traditional wedged bearing. Molecular dynamics simulation results indicate that the hydrodynamic pressure is proportional to the shear velocity. However, as the shear velocity exceeds a critical value, the slip length becomes infinite and the hydrodynamic bearing loses its function.
机译:提出了一种新型的动压轴承。轴承不是由两个板物理地形成楔形空间,而是由两个平行的板组成,在一个表面上具有不同的润湿性区域。通过引入这种具有润湿性的表面,可以建立流体动力压力,因为轴承中不同区域的局部滑移长度不同,并导致与传统楔形轴承相似的速度分布。分子动力学模拟结果表明,流体动力压力与剪切速度成正比。然而,当剪切速度超过临界值时,滑移长度变得无限,并且流体动力轴承失去其功能。

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