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Advanced control of heat transfer and fluid flow by magnetic nano-rod dispersion type magnetic functional nanofluid

Research Project

Project/Area Number 20K04263
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 19010:Fluid engineering-related
Research InstitutionShizuoka University

Principal Investigator

Motozawa Masaaki  静岡大学, 工学部, 准教授 (50516185)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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 / 磁気機能性ナノ流体 / 配向性 / 鎖状クラスター / ナノロッド / 熱流動 / 熱物性 / 伝熱促進 / 流動制御
Outline of Research at the Start

水やケロシンなどの分散媒中に粒径がナノオーダーの磁性ナノ粒子を添加した流体を磁気機能性ナノ流体と呼ぶ(一般には,磁性流体と呼ばれる).磁気機能性ナノ流体では,熱輸送流体としての応用に向けて,磁場印加下の熱流動特性について広く研究が進められている.本研究ではさらなる熱輸送の向上を目指して,流体内部に棒状の磁性ナノロッドを添加した磁性ナノロッド分散型磁気機能性ナノ流体(Magnetic Nano-Rod - Magnetic Fluid, MNR-MF)を提案する.MNR-MF内部の磁性ナノロッドの配向性を外部磁場によって制御することで,MNF-MFを用いた外部磁場による高度熱流動制御を目指す.

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.

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.

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (12 results)

All 2023 2022 2021 2020 Other

All Int'l Joint Research (1 results) Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results) Presentation (8 results) (of which Int'l Joint Research: 5 results,  Invited: 1 results) Remarks (2 results)

  • [Int'l Joint Research] カセサート大学(タイ)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Characteristics of heat transfer and flow resistance of magnetic fluid flow through porous media combined with magnetic field effect2023

    • Author(s)
      Rakpakdee Wannarat、Motozawa Masaaki、Fukuta Mitsuhiro、Chaiworapuek Weerachai
    • Journal Title

      Experimental Thermal and Fluid Science

      Volume: 144 Pages: 110851-110851

    • DOI

      10.1016/j.expthermflusci.2023.110851

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Experimental Investigation of Anisotropic Magnetic Property of Magnetic Nano-rod Dispersion Fluid2023

    • Author(s)
      Yasuhiro Sawahata, Masaaki Motozawa, Satoshi Ohta, Mitsuhiro Fukuta
    • Organizer
      16th International Conference on Magnetic Fluids (ICMF2023)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Experimental Study on Heat Transfer Enhancement / Suppression Phenomena in Laminar Magnetic Fluid Flow in Mini-channel2022

    • Author(s)
      Masaaki Motozawa, Yoshitaka Mizuno, Mitsuhiro Fukuta
    • Organizer
      International Symposium, on Applied Electromagnetics & Mechanics 2022(ISEM2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 磁性ナノロッド分散流体への磁場印加による内部クラスター形成の可視化2022

    • Author(s)
      澤畠康裕,本澤政明,福田充宏
    • Organizer
      第31回MAGDAコンファレンスin 鹿児島
    • Related Report
      2022 Annual Research Report
  • [Presentation] Experimental Study on Heat Transfer Enhancement / Suppression Phenomena in Laminar Magnetic Fluid Flow in Mini-channel2022

    • Author(s)
      M. Motozawa, Y. Mizuno, M. Fukuta
    • Organizer
      20th International Symposium on Applied Electromagnetics and Mechanics (ISEM 2022)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] ミニチャネルによる低Re数域の磁性流体の伝熱特性に関する実験的研究2021

    • Author(s)
      水野喜隆, 本澤政明, 福田充宏
    • Organizer
      2021年度磁性流体連合講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] Some characteristics of magnetic functional fluids2021

    • Author(s)
      M. Motozawa
    • Organizer
      The 8th International Workshop on Fluid Flow, Heat Transfer and Turbulent Drag Reduction (IWFHT2021)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] ミニチャネルにおける磁性流体の伝熱と流動に及ぼす磁場の影響2021

    • Author(s)
      水野喜隆, 本澤政明, 福田充宏
    • Organizer
      第33回「電磁力関連のダイナミクス」シンポジウム
    • Related Report
      2020 Research-status Report
  • [Presentation] Heat Transfer of Magnetic Fluid Flow through Ceramic Foam Porous Media under Magnetic Field2020

    • Author(s)
      W. Rakpakdee, M. Motozawa, M. Fukuta, W. Chaiworapuek
    • Organizer
      The 31st International Symposium on Transport Phenomena
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Remarks] 静岡大学 福田・本澤研HP

    • URL

      https://wwp.shizuoka.ac.jp/fluidmech-lab/

    • Related Report
      2022 Annual Research Report 2021 Research-status Report 2020 Research-status Report
  • [Remarks] 静岡大学 教員データベース

    • URL

      https://tdb.shizuoka.ac.jp/RDB/public/Default2.aspx?id=11077&l=0

    • Related Report
      2022 Annual Research Report

URL: 

Published: 2020-04-28   Modified: 2024-01-30  

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