• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Heat and Mass Transfer >Laser-induced local heating and lubricant depletion in heat assisted magnetic recording systems
【24h】

Laser-induced local heating and lubricant depletion in heat assisted magnetic recording systems

机译：热辅助磁记录系统中的激光感应局部加热和润滑剂消耗

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The present study concerns the depletion of thin lubricant film on a disk surface subject to repeated heating by a scanning laser in a heat assisted magnetic recording (HAMR) system. The absorption rate of optical energy by the disk medium is derived from Maxwell equations, which is incorporated into the energy equation by a source term. Both the temperature and the temperature gradient have important effects on lubricant thickness, which, in turn, influences lubricant dynamics and evaporation via the disjoining pressure. The heat loss via convection from the disk surface becomes significant only when the convective heat transfer coefficient is bigger than 10~9W/(K m~2). With an increase in the absorption coefficient β, the maximum temperature on the disk increases while the heat penetrating depth decreases. For the same energy absorptivity, the surface temperature and, in consequence, lubricant depletion, predicted by the present optical absorption model is lower than that obtained by simplifying the laser heating as a heat flux at the disk surface. By adjusting empirical absorptivity, the heat flux model can produce the same heat transfer results and, in consequence, the same lubricant depletion results, as those predicted by the optical absorption model only when β≥10~8 m~(-1).
机译：本研究涉及在热辅助磁记录（HAMR）系统中经受扫描激光反复加热的磁盘表面上薄润滑膜的消耗。磁盘介质对光能的吸收率是从麦克斯韦方程组导出的，该方程通过源项并入能量方程组。温度和温度梯度都对润滑剂厚度有重要影响，继而通过分离压力影响润滑剂动力学和蒸发。仅当对流传热系数大于10〜9W /（K m〜2）时，从磁盘表面通过对流产生的热损失才变得明显。随着吸收系数β的增加，盘上的最高温度升高，而热渗透深度降低。对于相同的能量吸收率，通过本光学吸收模型预测的表面温度以及因此的润滑剂消耗低于通过简化作为盘表面热通量的激光加热而获得的温度。通过调整经验吸收率，仅当β≥10〜8 m〜（-1）时，热通量模型才能产生与光吸收模型相同的传热结果，从而产生相同的润滑剂消耗结果。

著录项

  • 来源
  • 作者

    Peng Yu; Weidong Zhou; Shengkai Yu; Yan Zeng;

  • 作者单位

    Data Storage Institute, Agency for Science, Technology and Research (A*STAR), DSI Building, 5 Engineering Drive 1, Singapore 117608, Singapore;

    Data Storage Institute, Agency for Science, Technology and Research (A*STAR), DSI Building, 5 Engineering Drive 1, Singapore 117608, Singapore;

    Data Storage Institute, Agency for Science, Technology and Research (A*STAR), DSI Building, 5 Engineering Drive 1, Singapore 117608, Singapore;

    School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Lubricant depletion; Optical absorption; User heating; Heat assisted magnetic recording; Hard disk drives;

    机译：润滑剂耗竭;光吸收用户加热;热辅助磁记录;硬盘驱动器;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号