• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>American Society of Mechanical Engineers(ASME) Summer Heat Transfer Conference(HT2005) vol.2; 20050717-22; San Francisco,CA(UA) >Computer Modeling of Liquid Droplet Impact on Heat Transfer During Spray Cooling
【24h】

Computer Modeling of Liquid Droplet Impact on Heat Transfer During Spray Cooling

机译：喷雾冷却过程中液滴对传热影响的计算机建模

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

Spray cooling is a high flux heat removal technique considered for systems dissipating high power within small areas such as advanced lasers. Recently Selvam and Ponnappan (2004 & 2005) identified the importance of modeling heat transfer in a thin liquid film on a hot surface at the micro level and illustrated how this micro level modeling could help to improve the macro level spray cooling. The goal of this research is to advance the theoretical understanding of spray cooling to enable efficient system level hardware designs. Two-phase flow modeling is done using the level set method to identify the interface of vapor and liquid. The modifications made to the incompressible Navier-Stokes equations to consider surface tension and phase change are presented. The equations are solved using the finite difference method. The effect of liquid droplet impact on a 40 μm thick liquid film containing vapor bubble and the consequent heat removal is explained with a sequence of temperature vs. time contours. From that, the importance of fast transient conduction in the liquid film leading to high heat flux in a short time is illustrated. The optimum positioning of the droplet with respect to the vapor bubble for effective heat removal is also systematically investigated. This information is expected to help in proper positioning of the droplet in three-dimensional modeling.
机译：喷雾冷却是一种高通量排热技术，被认为是用于在小面积内耗散高功率的系统（例如高级激光器）。最近，Selvam和Ponnappan（2004年和2005年）发现了在微观水平上对热表面上的液体薄膜中的传热进行建模的重要性，并说明了这种微观水平的建模如何有助于改善宏观水平的喷雾冷却。这项研究的目的是提高对喷雾冷却的理论理解，以实现有效的系统级硬件设计。使用水平集方法完成两相流建模，以识别蒸气和液体的界面。提出了对不可压缩的Navier-Stokes方程进行的修改，以考虑表面张力和相变。使用有限差分法求解方程。液滴对包含蒸汽气泡的40μm厚液膜的冲击影响以及随之而来的除热通过一系列温度随时间变化的轮廓进行了解释。因此，说明了在液膜中快速瞬态传导在短时间内导致高热通量的重要性。还系统地研究了液滴相对于蒸汽泡的最佳定位，以有效地排热。预计该信息将有助于在三维建模中正确放置液滴。

著录项

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