Experimental investigation of convective heat transfer coefficient using Fe<sub>3</sub>O<sub>4</sub>/water nanofluids under different magnetic field in laminar flow

SHA Lili; JU Yonglin; ZHANG Hua

doi:10.11949/j.issn.0438-1157.20170820

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Experimental investigation of convective heat transfer coefficient using Fe₃O₄/water nanofluids under different magnetic field in laminar flow

更新时间：2025-12-10

- Experimental investigation of convective heat transfer coefficient using Fe₃O₄/water nanofluids under different magnetic field in laminar flow
- CIESC Journal Issue 4, Pages: 1349-1356(2018)
- 作者机构：
  
  上海交通大学制冷与低温工程研究所,上海,200240
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20170820
  CLC： K114
- Online First：05 April 2018，
  
  Published：05 April 2018
- 稿件说明：
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SHA Lili, JU Yonglin, ZHANG Hua. Experimental investigation of convective heat transfer coefficient using Fe₃O₄/water nanofluids under different magnetic field in laminar flow[J]. CIESC Journal, 2018, (4): 1349-1356. DOI: 10.11949/j.issn.0438-1157.20170820.
DOI：

SHA Lili, JU Yonglin, ZHANG Hua. Experimental investigation of convective heat transfer coefficient using Fe₃O₄/water nanofluids under different magnetic field in laminar flow[J]. CIESC Journal, 2018, (4): 1349-1356. DOI: 10.11949/j.issn.0438-1157.20170820. DOI：

摘要

对体积分数为3%的Fe3O4/water纳米流体在不同温度、不同磁场大小和方向的均匀磁场和梯度磁场作用下的对流换热进行了详细的实验研究。首先，开展了纳米流体能量方程的量纲1分析，讨论了纳米流体强化换热的机理。发现磁性纳米粒子所受到的磁力远远大于布朗运动力。实验测试结果与量纲1分析相吻合，在垂直均匀磁场作用下，纳米流体层流流动的平均对流传热系数提高了5.2%；在垂直梯度磁场作用下，平均对流传热系数提高了9.2%。而在水平均匀磁场作用下，纳米流体平均对流传热系数下降了4.8%。另外，随着温度的升高，对流传热系数均逐渐升高。

Abstract

The convective heat transfer coefficients of 3%(vol) Fe3O4/water nanofluids were investigated at different inlet temperatures

under the perpendicular

uniform and gradient magnetic field and parallel magnetic field. Based on the non-dimensional analysis of the energy equation for the Fe3O4/water nanofluids

the effect of the magnetic field instead of the thermal motion of magnetic nanoparticles dominated the thermal transfer performance of Fe3O4/water nanofluids. The maximum increase of the convective heat transfer of Fe3O4/water nanofluids were 5.2% and 9.2%

respectively

under perpendicular

uniform and gradient magnetic fields. The maximum decrease of 4.8% for the convective heat transfer was observed under parallel and uniform magnetic field. In addition

the convective heat transfer coefficient increased with the temperature of Fe3O4/water nanofluids. The experimental results agreed well with the non-dimensional analysis.

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Experimental investigation of convective heat transfer coefficient using Fe3O4/water nanofluids under different magnetic field in laminar flow

DOI：10.11949/j.issn.0438-1157.20170820

摘要

Abstract

关键词

Keywords

references

Experimental investigation of convective heat transfer coefficient using Fe₃O₄/water nanofluids under different magnetic field in laminar flow