...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Heat Transfer >Laminar Flow Forced Convection Heat Transfer Behavior of a Phase Change Material Fluid in Microchannels
【24h】

Laminar Flow Forced Convection Heat Transfer Behavior of a Phase Change Material Fluid in Microchannels

机译：微通道中相变材料流体的层流强迫对流换热行为

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

In this paper, a phase change material (PCM) fluid (N-eicosane) is compared with pure water as heat transfer fluid. The heat transfer behavior of PCM fluid under laminar flow conditions (Reynolds number of 700) in circular and rectangular microchannels was studied numerically. In the numerical study, an effective specific heat model was used to take into account the phase change process. Heat transfer results for circular and rectangular microchannels with PCM fluid were obtained under hydrodynamically and thermally fully developed conditions. A PCM fluid in microchannels with aspect ratios of 1 to 2, 1 to 4, and 1 to 8 was found to enhance the thermal behavior of microchannels which can be beneficial in a host of cooling applications. The flow was assumed to be hydrodynamically fully developed at the inlet and thermally developing inside the microchannel. Heat transfer characteristics of PCM slurry flow in microchannels have been studied under three types of wall boundary conditions including constant axial heat flux with constant peripheral temperature (H1), constant heat flux with variable peripheral temperature (H2), and constant wall temperature (T) boundary condition. The fully developed Nusselt number was found to be higher for H1 than for H2 and T boundary conditions for all the geometries. Moreover, Nusselt number also increased with aspect ratio and was sensitive to the variations in effective specific heat.
机译：本文将相变材料（PCM）流体（N-二十烷）与纯水作为传热流体进行了比较。数值研究了在层流条件（雷诺数为700）下圆形和矩形微通道中PCM流体的传热行为。在数值研究中，使用了有效的比热模型来考虑相变过程。在流体动力学和热充分开发条件下，获得了带有PCM流体的圆形和矩形微通道的传热结果。发现微通道中纵横比为1至2、1至4和1至8的PCM流体可增强微通道的热性能，这在许多冷却应用中可能是有益的。假定该流动在入口处在流体动力学上完全展开，并且在微通道内部热展开。在三种类型的壁边界条件下研究了PCM浆液在微通道中的传热特性，包括恒定的轴向热通量和恒定的外围温度（H1），恒定的热通量和可变的周边温度（H2）和恒定的壁温（T）。边界条件。对于所有几何图形，发现H1的完全发展的Nusselt数高于H2和T边界条件。此外，Nusselt数也随纵横比增加，并且对有效比热的变化敏感。

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