2022 Fiscal Year Final Research Report
Advanced control of heat transfer and fluid flow by magnetic nano-rod dispersion type magnetic functional nanofluid
| Project/Area Number |
20K04263
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 19010:Fluid engineering-related
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| Research Institution | Shizuoka University |
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Principal Investigator |
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | 磁気機能性流体 / 磁性流体 / 磁性ナノロッド / 磁気特性 / 異方性 |
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| Outline of Final Research Achievements |
Magnetic functional nanofluid is the dispersion of the nano-order magnetic particles in liquid carrier, and such a fluid is popular as a magnetic fluid. It is well known that the clustering structure in magnetic functional nanofluid causes interesting features such as anisotropy and time-series change. Although inner magnetic particles in magnetic functional nanofluid are generally spherical in shape, if rod-shape magnetic particles are dispersed in magnetic nanofluid, it is expected to enhance anisotropic features by applying magnetic field. In this study, magnetic nano-rods dispersion fluid is prepared, and the anisotropic magnetic property caused by orientation of magnetic nano-rod are investigated. The results show that there are no hysteresis loops in magnetic functional nanofluid, whereas hysteresis appeared and small coercive magnetic force is generated in magnetic nano-rod dispersion fluid even when there is no orientation of the inner nano-rods.
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| Free Research Field |
流体工学
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| Academic Significance and Societal Importance of the Research Achievements |
作動媒体液にナノオーダーの金属・非金属ナノ粒子を分散させたナノ流体は，熱輸送流体として，提案当初，大きな注目を集め，現在に至るまで世界中で広く研究が繰り広げられている．また，磁性ナノ粒子を分散させた磁気機能性ナノ流体では熱輸送だけでなく，シール技術や生体応用など広く研究が進められている．本研究は外部操作可能な磁性ナノ粒子として，棒状の磁性ナノロッドを利用し，ナノロッドの配向性，位置，回転を制御することで，磁気機能性ナノ流体の特徴の一つである粒子の配向を積極的に利用することで磁気特性の向上，高伝熱促進を目指している．
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