• 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 >Wicking and thermal characteristics of micropillared structures for use in passive heat spreaders
【24h】

Wicking and thermal characteristics of micropillared structures for use in passive heat spreaders

机译：用于被动式散热器的微柱结构的芯吸和热特性

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 thermal and hydrodynamic performance of passive two-phase cooling devices such as heat pipes and vapor chambers is limited by the capabilities of the capillary wick structures employed. The desired characteristics of wick microstructures are high permeability, high wicking capability and large extended meniscus area that sustains thin-film evaporation. Choices of scale and porosity of wick structures lead to trade-offs between the desired characteristics. In the present work, models are developed to predict the capillary pressure, permeability and thin-film evaporation rates of various micropillared geometries. Novel wicking geometries such as conical and pyramidal pillars on a surface are proposed which provide high permeability, good thermal contact with the substrate and large thin-film evaporation rates. A comparison between three different micropillared geometries - cylindrical, conical and pyramidal - is presented and compared to the performance of conventional sintered particle wicks. The employment of micropillared wick structure leads to a 10-fold enhancement in the maximum heat transport capability of the device. The present work also demonstrates a basis for reverse-engineering wick microstructures that can provide superior performance in phase-change cooling devices.
机译：被动式两相冷却装置（如热管和蒸气室）的热和流体动力性能受到所采用的毛细管芯结构的能力的限制。芯吸微结构的所需特性是高渗透性，高芯吸能力和较大的可维持薄膜蒸发的弯月面。芯结构的尺寸和孔隙率的选择导致所需特性之间的权衡。在目前的工作中，模型被开发来预测各种微柱几何形状的毛细压力，渗透率和薄膜蒸发速率。提出了新颖的芯吸几何形状，例如表面上的圆锥形和金字塔形支柱，它们提供了高渗透性，与基板的良好热接触以及大的薄膜蒸发速率。提出了三种不同的微柱几何形状（圆柱形，圆锥形和金字塔形）之间的比较，并将其与常规烧结颗粒灯芯的性能进行了比较。采用微柱状灯芯结构可使该装置的最大传热能力提高10倍。本工作还展示了反向工程灯芯微结构的基础，该结构可以在相变冷却装置中提供出色的性能。

著录项

  • 来源
    《International Journal of Heat and Mass Transfer》 |2012年第4期|p.586-596|共11页
  • 作者

    Ram Ranjan; Abhijeet Patel; Suresh V. Garimella; Jayathi Y. Murthy;

  • 作者单位

    Cooling Technologies Research Center, An NSF IUCRC, School of Mechanical Engineering and Birck Nanotechnology Center, Purdue University, 585 Purdue Mall, West Lafayette, IN 47907, USA;

    Cooling Technologies Research Center, An NSF IUCRC, School of Mechanical Engineering and Birck Nanotechnology Center, Purdue University, 585 Purdue Mall, West Lafayette, IN 47907, USA;

    Cooling Technologies Research Center, An NSF IUCRC, School of Mechanical Engineering and Birck Nanotechnology Center, Purdue University, 585 Purdue Mall, West Lafayette, IN 47907, USA;

    Cooling Technologies Research Center, An NSF IUCRC, School of Mechanical Engineering and Birck Nanotechnology Center, Purdue University, 585 Purdue Mall, West Lafayette, IN 47907, USA;

  • 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

    heat pipe; thermal spreaders; wick structure; evaporation; micro-pillars;

    机译：热管;散热器;灯芯结构蒸发;微型支柱;

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