2022 Fiscal Year Final Research Report
Turbulence control in boundary layer wind tunnel experiment by magnetic nano-particle manipulation
| Project/Area Number |
20K20541
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| Research Category |
Grant-in-Aid for Challenging Research (Pioneering)
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| Allocation Type | Multi-year Fund |
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| Review Section |
Medium-sized Section 23:Architecture, building engineering, and related fields
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
飯田 琢也 大阪公立大学, 理学(系)研究科(研究院), 教授 (10405350)
床波 志保 大阪公立大学, 工学(系)研究科(研究院), 准教授 (60535491)
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| Project Period (FY) |
2020-07-30 – 2023-03-31
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| Keywords | 風洞実験 / 乱流制御 / ナノ粒子 |
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| Outline of Final Research Achievements |
Through this research project, (1) we demonstrated that controlling of flow is possible with manipulation of magnetic particles (different scales ranging from millimeter to sub-micro meter), which are spread in fluid by applying magnetic field; (2) we developed a measurement system that enables us to simultaneously measure motions of magnetic particles and tracers that are introduced to analyze the flow; (3) we succeeded in the production of "magnetic nanoparticle-fixed bead" in which magnetic nanoparticles were fixed on the surface of the core microbeads; (4) we confirmed the modulation of apparent kinematic viscosity under the application of magnetic field onto these magnetic particles dispersed in a microfluidic channel and their properties were also investigated under the optical pressure.
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| Free Research Field |
風工学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究の学術的意義は、大気境界層中に位置する建築物の空気力学的特性を解明するための風洞実験手法を革新することである。新たな乱流制御手法の確立によって、既存の風洞実験では再現困難であった大きなスケールの乱れや高次の乱流統計量を模擬できれば、これまでは困難であった竜巻による飛散物の飛散、吹雪による吹き溜まりなどの風複合現象に対する風洞実験による模擬への道が拓かれることである。また、そのような複合現象を模擬できれば、強風に関連する災害の発生メカニズムの解明に貢献することができるなど、社会的意義も大きい。
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