Temperature-sensitive magnetic fluid (TSMF) is a magnetic nanoparticle suspension with strong temperature-dependent magnetization even at room temperature. TSMF is a refrigerant that enables high heat transport capability and pumpless long-distance heat transport. To enhance the heat transport capacity of the magnetically-driven heat transport device using TSMF, it is effective to use a heating body with a very large heat exchange surface such as a heat sink or a porous medium. In the present study, the thermal flow of TSMF around a single heating pipe under a magnetic field was investigated. Visualization of the temperature field by infrared thermography showed that the application of the magnetic field dramatically developed the thermal boundary layer and improved heat transfer. It was clarified by numerical analysis that this dramatic variation in the thermal boundary layer was associated with several vortexes generated by magnetic force in the vicinity of the heating pipe.

中文翻译：

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对温度敏感的磁性流体在单个加热管周围的传热

温敏磁性流体（TSMF）是磁性纳米颗粒悬浮液，即使在室温下也具有很强的温度依赖性磁化强度。TSMF是一种制冷剂，可实现高热传递能力和无泵长距离热传递。为了提高使用TSMF的磁性驱动传热装置的传热能力，有效的是使用具有很大的热交换表面的加热体，例如散热器或多孔介质。在本研究中，研究了在磁场下单根加热管周围TSMF的热流。通过红外热像仪对温度场进行可视化显示，磁场的应用极大地发展了热边界层并改善了热传递。