In an elastohydrodynamic lubricated (EHL) contact under Zero Entrainment Velocity (ZEV) condition, surfaces cannot be separated by hydrodynamic lift. In this work, two other phenomena responsible for a film thickness build-up in ZEV contacts are studied using a numerical model. First, the thermal effect called “viscosity wedge” is investigated in steady-state conditions. Second, the “squeeze” effect is described in an environment where dynamic (time dependent) loads are considered. Then, both the viscosity wedge and squeeze effects are considered together. For each one of the two mechanisms, a characteristic time is considered. The ratio of these two times allows the identification of a dominant effect. Depending on this ratio, a prediction is attempted using semi-analytical models describing each effect. For an ideal set of parameters, it is shown that the combination of squeeze and viscosity wedge in EHL contact under ZEV allows for an enhanced performance.

中文翻译：

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EHL接触中零夹带速度下的粘度楔和挤压协同作用

在零夹带速度（ZEV）条件下的弹性流体动力润滑（EHL）接触中，不能通过流体动力升力来分离表面。在这项工作中，使用数值模型研究了导致ZEV触点中膜厚增加的另外两个现象。首先，在稳态条件下研究称为“粘度楔”的热效应。其次，在考虑动态（时间相关）负载的环境中描述“挤压”效应。然后，同时考虑粘度楔和挤压效应。对于这两种机制中的每一种，都要考虑特征时间。这两次的比例可以确定显性作用。根据该比率，尝试使用描述每种效应的半分析模型进行预测。对于一组理想的参数，