Numerical simulation of mixed lubrication considering surface forces

Zhang Shuowen; Zhang Chenhui; Hu Yuanzhong; Ma Liran

首页> 外文期刊>Tribology International >Numerical simulation of mixed lubrication considering surface forces

【24h】

Numerical simulation of mixed lubrication considering surface forces

机译：考虑表面力的混合润滑的数值模拟

获取原文

获取原文并翻译 | 示例

掌桥外文数据库（机构版） >>

开具论文收录证明 >>

文献代查 >>

页面导航

摘要
著录项
相似文献
相关主题

摘要

Mixed lubrication describes a lubrication regime where elastohydrodynamic lubrication and asperity contact coexist. Surface spacing is expected to be small during the interaction between nano-scale smooth surfaces. When alkali metal salt solution is applied as lubricant, short-range surface forces are incorporated into an existing model to simulate mixed lubricated non-conformal sliding contact. The new model is examined in a wide range of sliding velocities to demonstrate the effect of surface forces at different lubrication regime, from boundary lubrication to full film hydrodynamic lubrication. It is revealed that surface forces reduce friction coefficient particularly at mixed lubrication regime. Reduction of surface roughness improves contribution of surface forces and makes it easier to achieve superlubricity at low speed.

机译：混合润滑描述了弹性流体动力学润滑和粗糙度接触共存的润滑制度。在纳米尺度平滑表面之间的相互作用期间，表面间距预计将很小。当碱金属盐溶液作为润滑剂施加时，将短距离的表面力掺入现有的模型中以模拟混合润滑的非全成形滑动接触。在各种滑动速度下检查新模型，以证明表面力在不同润滑制度下的影响，从边界润滑到全膜流体动力学润滑。揭示了表面力，特别是在混合润滑制度下减少摩擦系数。表面粗糙度的减少改善了表面力的贡献，并更容易以低速实现超级润滑性。

著录项

来源
《Tribology International》 |2019年第2019期|共11页
作者
Zhang Shuowen; Zhang Chenhui; Hu Yuanzhong; Ma Liran;
展开▼
作者单位

Tsinghua Univ State Key Lab Tribol Beijing 100084 Peoples R China;

Tsinghua Univ State Key Lab Tribol Beijing 100084 Peoples R China;

Tsinghua Univ State Key Lab Tribol Beijing 100084 Peoples R China;

Tsinghua Univ State Key Lab Tribol Beijing 100084 Peoples R China;

展开▼
收录信息
原文格式 PDF
正文语种 eng
中图分类机械摩擦、磨损与润滑;
关键词
Mixed lubrication; Aqueous lubrication; Surface force;

机译：混合润滑;水性润滑;表面力;

相似文献

外文文献
中文文献
专利

1. Numerical simulation of mixed lubrication considering surface forces [J] . Zhang Shuowen, Zhang Chenhui, Hu Yuanzhong, Tribology International . 2019,第期

机译：考虑表面力的混合润滑的数值模拟
2. Optimization of mesh density for numerical simulations of hydrodynamic lubrication considering textured surfaces [J] . Adjemout M., Brunetiere N., Bouyer J. Proceedings of the Institution of Mechanical Engineers, Part J. Journal of engineering tribology . 2015,第9期

机译：考虑纹理表面的流体动力润滑数值模拟的网格密度优化
3. Numerical investigation of models for drag, lift, wall lubrication and turbulent dispersion forces for the simulation of gas-liquid two-phase flow [J] . Yamoah Stephen, Martinez-Cuenca Raul, Monros Guillem, Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers . 2015,第Juna期

机译：气液两相流模拟的阻力，升力，壁润滑和湍流分散力模型的数值研究
4. Numerical Simulation of Surface Contact and Mixed Lubrication --Deterministic Approach vs. Stochastic Approach [C] . P.B.Shelishch Computational Mechanics . 2007

机译：表面接触和混合润滑的数值模拟-确定性方法与随机性方法
5. EFFECTS OF SURFACE ROUGHNESS ON PARTIAL FILM LUBRICATION USING AN AVERAGE FLOW MODEL BASED ON NUMERICAL SIMULATION. [D] . PATIR, NADIR. 1978

机译：基于数值模拟的平均流模型，表面粗糙度对部分膜润滑的影响。
6. Numerical investigation of the tribological performance of micro-dimple textured surfaces under hydrodynamic lubrication [O] . Kangmei Li, Dalei Jing, Jun Hu, 2017

机译：流体动力润滑下微凹纹表面摩擦性能的数值研究
7. The oceans mediate the response of global climate to natural and anthropogenic forcings. Yet for the past 2,000 years — a key interval for understanding the present and future climate response to these forcings — global sea surface temperature changes and the underlying driving mechanisms are poorly constrained. Here we present a global synthesis of sea surface temperatures for the Common Era (ce) derived from 57 individual marine reconstructions that meet strict quality control criteria. We observe a cooling trend from 1 to 1800 ce that is robust against explicit tests for potential biases in the reconstructions. Between 801 and 1800 ce, the surface cooling trend is qualitatively consistent with an independent synthesis of terrestrial temperature reconstructions, and with a sea surface temperature composite derived from an ensemble of climate model simulations using best estimates of past external radiative forcings. Climate simulations using single and cumulative forcings suggest that the ocean surface cooling trend from 801 to 1800 ce is not primarily a response to orbital forcing but arises from a high frequency of explosive volcanism. Our results show that repeated clusters of volcanic eruptions can induce a net negative radiative forcing that results in a centennial and global scale cooling trend via a decline in mixed-layer oceanic heat content. [O] . McGregor, Helen V., Evans, Michael N., Goosse, Hugues, 2015

机译：海洋调节了全球气候对自然和人为强迫的响应。然而，在过去的2,000年中（这是了解当前和未来气候对这些强迫的响应的关键间隔），全球海表温度变化及其潜在的驱动机制受到的约束很有限。在这里，我们提出了一个共同的时期（ce）的全球海面温度的全球综合，该综合来自57个符合严格质量控制标准的海洋重建项目。我们观察到从1到1800 ce的冷却趋势，对于显式测试重建中潜在的偏倚而言，该趋势很稳健。在801至1800 ce之间，表面降温趋势在质量上与地面温度重建的独立合成以及从使用过去外部辐射强迫的最佳估计的气候模型模拟集合推导出的海面温度合成在质量上是一致的。使用单一和累积强迫的气候模拟表明，从801到1800 ce的海洋表面冷却趋势主要不是对轨道强迫的反应，而是爆炸性火山爆发的频繁发生。我们的结果表明，火山喷发的反复簇可引起净的负辐射强迫，这会导致混合层海洋热量降低而导致百年和全球规模的降温趋势。
8. Numerical Simulation of Topographically Forced Mesoscale Variability in a Well-Mixed Marine Layer [R] . Eddington, L. W., O'Brien, J. J., Stuart, D. W. 1992

机译：混合海洋地层中地形强迫中尺度变化的数值模拟

Numerical simulation of mixed lubrication considering surface forces

摘要

著录项

相似文献

相关主题

期刊订阅