Abstract The study gives a comprehensive overview of ferrohydrodynamic pipe flow experiments under the influence of magnetic fields carried out in the last decade. Both cases laminar and turbulent flow are considered. The compilation confirms that significant enhancement of heat transfer is possible as long as the magnetic field has the same orientation as the heat flux. Various effects, among them chain-like aggregation of particles, generation of secondary motion by magnetic field, and pinning of large amounts of particles on the inner pipe wall are discussed as the primary causes. The study depicts that occurrence and intensity of these effects depend on the relative strength of the imposed magnetic force compared to the inertial and viscous forces characterising the flow. Based on the compiled experimental and numerical findings, it seems to be possible to build large-scale heat transfer devices with switchable heat transfer capabilities.

中文翻译：

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利用铁纳米流体的铁流体动力管流传热实验的批判性审查

摘要 本研究全面概述了近十年来在磁场影响下进行的铁水动力管流实验。考虑了层流和湍流两种情况。该汇编证实，只要磁场与热通量具有相同的方向，就可以显着增强传热。作为主要原因，讨论了各种影响，其中包括颗粒的链状聚集、磁场产生的二次运动以及大量颗粒固定在管内壁上。该研究表明，与表征流动的惯性力和粘性力相比，这些效应的发生和强度取决于施加的磁力的相对强度。根据汇总的实验和数值结果，