Dynamic Behavior of Two Ag Nanowires Dispersed in Magnetic Fluid
Dynamic Behavior of Two Ag Nanowires Dispersed in Magnetic Fluid
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DOI：
10.14243/jsaem.27.128
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
Y. Iwamoto;Atsushi Yoshioka;Y. Ido;J. Cuya;B. Jeyadevan;H. Yamasaki;H. Yamaguchi
中科院分区：
文献类型：
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作者：
Y. Iwamoto;Atsushi Yoshioka;Y. Ido;J. Cuya;B. Jeyadevan;H. Yamasaki;H. Yamaguchi
纳米流体因其优异的传热能力而在传热领域备受关注。作者提出了一种银纳米线分散的磁性纳米流体。有趣的是，它的热导率可以通过施加磁场的方向来调节，因为分散的银纳米线定向于磁场方向。但银纳米线的动态行为尚不清楚。在本研究中，从理论上分析了相邻两根银纳米线的平移过程。当银纳米线分散在磁性流体中并暴露于磁场时，银纳米线明显表现为抗磁性材料，因为银纳米线的表面带磁。假设单个磁矩位于Ag纳米线的中心，磁偶极子相互作用力即吸引力作用在Ag纳米线上，并且线之间需要很长时间才能接触。
Nanofluids have attracted much attention in the field of heat transfer because of their exceptional heat transfer ability. The authors have proposed a silver nanowire-dispersed magnetic nanofluid. Interestingly, its thermal conductivity is tunable by the direction of the applied magnetic field, because the dispersed Ag nanowires orient to the field direction. But the dynamic behavior of Ag nanowires is not well understood. In the present study, the translation process of the neighboring two Ag nanowires was theoretically analyzed. When the Ag nanowires are dispersed in the magnetic fluid and exposed to the magnetic field, the Ag nanowires apparently behave as a diamagnetic material because the surface of the Ag nanowires is magnetically charged. With assuming that single magnetic moment places at the center of Ag nanowires, the magnetic dipole interaction force, which is the attraction force, acts on the Ag nanowires, and the wires contact each other with taking a long time.