• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>Materials >Investigation of Laminar Convective Heat Transfer for Al2O3-Water Nanofluids Flowing through a Square Cross-Section Duct with a Constant Heat Flux
【2h】

Investigation of Laminar Convective Heat Transfer for Al2O3-Water Nanofluids Flowing through a Square Cross-Section Duct with a Constant Heat Flux

机译：Al2O3-水纳米流体在恒定通量下通过方形截面管道的层流对流换热研究

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The objective of this study is to numerically investigate the convective heat transfer of water-based Al2O3 nanofluids flowing through a square cross-section duct with a constant heat flux under laminar flow conditions. The effects of nanoparticle concentration and Peclet number on the heat transfer characteristics of Al2O3-water nanofluids are investigated. The nanoparticle diameter is 25 nm and six particle concentrations (0.2, 0.5, 1, 1.5, 2, and 2.5 vol.%) are considered. The numerical results show that the heat transfer coefficients and Nusselt numbers of Al2O3-water nanofluids increase with increases in the Peclet number as well as particle volume concentration. The heat transfer coefficient of nanofluids is increased by 25.5% at a particle volume concentration of 2.5% and a Peclet number of 7500 as compared with that of the base fluid (pure water). It is noteworthy that at the same particle volume concentration of 2.5%, the enhancement of the convective heat transfer coefficient of Al2O3-water nanofluid (25.5%) is much higher than that of the effective thermal conductivity (9.98%). Thus, the enhancement of the convective heat transfer cannot be solely attributed to the enhancement of the effective thermal conductivity. Additionally, the numerical results coincide well with the published experimental data.
机译：这项研究的目的是在层流条件下，以恒定的热通量数值研究流过方形截面管道的水基Al2O3纳米流体的对流传热。研究了纳米颗粒浓度和佩克雷特数对Al2O3-水纳米流体传热特性的影响。纳米颗粒直径为25nm，并且考虑了六个颗粒浓度（0.2、0.5、1、1.5、2和2.5体积％）。数值结果表明，Al2O3-水纳米流体的传热系数和Nusselt数随Peclet数和颗粒体积浓度的增加而增加。与基础流体（纯水）相比，在2.5％的颗粒体积浓度和7500的Peclet数下，纳米流体的传热系数提高了25.5％。值得注意的是，在相同的颗粒体积浓度为2.5％的情况下，Al2O3-水纳米流体的对流传热系数（25.5％）的提高远高于有效导热率（9.98％）。因此，对流传热的增强不能仅归因于有效导热率的增强。此外，数值结果与已发布的实验数据非常吻合。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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