HAMR 空气轴承中全氟聚醚润滑剂动力学的数值模拟

IF 2.9 3区工程技术 Q2 ENGINEERING, CHEMICAL

Tribology Letters Pub Date : 2024-04-18 DOI:10.1007/s11249-024-01853-5

Roshan Mathew Tom, Qilong Cheng, David B. Bogy

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引用次数: 0

摘要

本报告研究了 HAMR 空气轴承中润滑剂分子的动力学，以了解封头表面全氟聚醚污染物的形成和增长。与空气轴承的碰撞会产生三种力--拖曳力、热泳力和升力。我们发现其中的升力可以忽略不计。然后，对其余两种力的敏感性分析揭示了它们占主导地位的条件。此外，我们还利用混合模拟策略来跟踪它们的运动。结果表明，污染（涂抹）在很大程度上取决于热泳力和阻力之间的相互作用。然后，我们解释了各种观察到的图案的形成机制。最后，我们提出了一些建议，以利用空气轴承来控制头部的污点。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

A Numerical Simulation of PFPE Lubricant Kinetics in HAMR Air Bearing

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A Numerical Simulation of PFPE Lubricant Kinetics in HAMR Air Bearing

This report investigates the kinetics of lubricant molecules in the HAMR air bearing to understand the initiation and growth of PFPE contamination on the head surface. The collisions with the air bearing induce three forces—drag, thermophoresis, and lift. Of these, we find that lift forces are negligible. Then, a sensitivity analysis of the remaining two forces reveals the conditions where they dominate. Further, a hybrid simulation strategy is utilized to track their movements. The results show that the contaminations (smear) highly depend on the interplay between the thermophoresis and drag forces. We then explain the mechanism of the formation of the various observed patterns. Finally, we offer some recommendations to exploit the air bearing to contain smear on the head.

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来源期刊

Tribology Letters 工程技术-工程：化工

CiteScore

5.30

自引率

9.40%

发文量

116

审稿时长

2.5 months

期刊介绍： Tribology Letters is devoted to the development of the science of tribology and its applications, particularly focusing on publishing high-quality papers at the forefront of tribological science and that address the fundamentals of friction, lubrication, wear, or adhesion. The journal facilitates communication and exchange of seminal ideas among thousands of practitioners who are engaged worldwide in the pursuit of tribology-based science and technology.