文章基本信息

标题：Experimental and numerical investigation of fully developed forced convection of water-based Fe 3 O 4 nanofluid passing through a tube in the presence of an alternating magnetic field
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作者：Mohammad Hosein Dibaei Bonab ; Mohammad Behshad Shafii ; Mohammad Hasan Nobakhti 等
期刊名称：Advances in Mechanical Engineering
印刷版ISSN：1687-8140
电子版ISSN：1687-8140
出版年度：2015
卷号：7
期号：2
DOI：10.1177/1687814015571023
语种：English
出版社：Sage Publications Ltd.
摘要：The effect of a magnetic field on the fully developed forced convection of Fe₃O₄ flow inside a copper tube is experimentally and numerically investigated. The flow is assumed to be under uniform heat flux. This study aims to examine the effects of the nanoparticle volume fraction, as well as alternating magnetic field strength and frequency, on the convective heat transfer for different Reynolds numbers. To ensure accuracy, the numerical results are validated by empirical results with similar geometry and boundary conditions. A satisfying agreement was achieved. The results show that the heat transfer increases with increase in alternating magnetic field frequency but decreases with increase in volume fraction. At a fixed Reynolds number, increased frequency of the alternating magnetic field leads to an increase in the local heat transfer coefficient; however, this increase is unproportional to that of frequency. In high frequencies, increase in frequency leads to a slight increase in the heat transfer coefficient.
关键词：Ferrofluid; nanoparticles; convection; alternating magnetic field