Sawada, Tatsuo

写真a

Affiliation

Faculty of Science and Technology, Department of Mechanical Engineering (Yagami)

Position

Professor

E-mail Address

E-mail address

Related Websites

External Links

Career 【 Display / hide

  • 1983.04
    -
    1988.03

    Research Associate, Department of Mechanical Engineering, Faculty of Science and Technology, Keio University

  • 1988.04
    -
    1993.03

    Assistant Professor, Department of Mechanical Engineering, Faculty of Science and Technology, Keio University

  • 1988.10
    -
    1989.09

    Visiting Scientist, Institute of Aerodynamics, RWTH Aachen University

  • 1993.04
    -
    2002.03

    Associate Professor, Department of Mechanical Engineering, Faculty of Science and Technology, Keio University

  • 2000.04
    -
    2001.03

    Part-time Lecturer, Institute of Fluid Science, Tohoku University

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Academic Background 【 Display / hide

  • 1974.04
    -
    1978.03

    Keio University, Faculty of Engineering, Departmenr of Mechanical Engineering

    Japan, University, Graduated

  • 1978.04
    -
    1980.03

    Keio University, Division of Engineering, Mechanical Engineering

    Japan, Graduate School, Completed, Master's course

  • 1980.04
    -
    1983.03

    Keio University, Division of Engineering, Mechanical Engineering

    Japan, Graduate School, Completed, Doctoral course

Academic Degrees 【 Display / hide

  • Ph.D., Keio University, Coursework, 1983.03

 

Research Areas 【 Display / hide

  • Fluid engineering (Fluid Engineering)

Research Keywords 【 Display / hide

  • MR Fluid

  • Flow-induced vibration

  • Magnetic Field

  • Magnetic FLuid

  • Ultrasonic Wave

Research Themes 【 Display / hide

  • Magnetic Functional Fluids, 

    1983
    -
    Present

     View Summary

    Flow problems of magnetic and magneto-rheological fluids

 

Books 【 Display / hide

  • Ultrasonic Doppler Velocity Profiler for Fluid Flow

    Hiroshige Kikura, Masaaki Motozawa and Tatsuo Sawada, Springer, 2012.09

    Scope: Sec.5.5 Magnetic Fluids (pp.161-168)

     View Summary

    Sec.5.5 Magnetic Fluids are written by us.

Papers 【 Display / hide

  • Dynamic pressure change of a liquid sloshing in a rotating, laterally oscillating, cylindrical container

    Tatsuo Sawada, Eisaku Yokose and Yusuke Saito

    CD-Proceedings of 2018 Sustainable Industrial Processing Summit and Exhibition 4   101-108 2019.06

    Research paper (international conference proceedings), Joint Work, Accepted,  ISSN  2291-1227

     View Summary

    We investigated characteristics of water sloshing in a rotating, laterally oscillating, cylindrical container both theoretically and experimentally. In our experiment, the time-dependent dynamic pressure of the water on the wall rather than the free-surface displacement of the water was measured, and the experimental parameters are the lateral forcing frequency, the rotation frequency of the cylindrical container, and the water depth. We also conducted a theoretical analysis to understand the experimental results. The swirling of water in the container had some frequency components; the frequency responses of each frequency component are examined herein.

  • Application of knockdown pontoons of the emergency measures for volcanic hazards of Mount Fuji

    Yuji Doya, Tatsuo Sawada, Taisuke Morikawa, Yuya Iseda

    Journal of Fujiology (Japan Society of Fujiology)  15 ( 2 ) 1 - 15 2019.01

    Research paper (scientific journal), Joint Work, Accepted,  ISSN  2433-0310

     View Summary

    We investigate the stability and strength of a reinforced, rectangular-hull knockdown pontoon to determine the feasibility of the usage of knockdown pontoons for emergency procedures in case of Mt. Fuji volcanic hazards. The stability of the self-propelled ship is evaluated by the metacentric height of the ship. However, a pontoon with a rectangular hull exhibits a large metacentric height that could cause the loss of ship stability. We propose a new technique to avoid an overly optimistic evaluation of a pontoon’s stability. The hull strength evaluation method that is used in case of the reinforced knockdown pontoon differentiates between two types of load distributions, divided load and concentrated load. By comparing the evaluations that were obtained using these two types of load distribution, we clarified the differences between these approaches.

  • Magnetic fluid flow under DC and AC magnetic fields

    Yuta Itahashi, Ryutaro Hirano and Tatsuo Sawada

    International Journal of Applied Electromagnetics and Mechanics (IOS Press)  59 ( 1 ) 341 - 347 2019.01

    Research paper (scientific journal), Joint Work, Accepted,  ISSN  1383-5416

     View Summary

    This study reports magnetic fluid flow in a square duct under DC, AC, and DC+AC magnetic fields. We measured pressure drop with applying different magnetic fields. Under magnetic fields, flow resistance increased by forming a cluster so that pressure drop and friction factor also increased. From FFT analysis of the pressure drop, we obtained different power spectrum for AC and DC+AC magnetic fields.

  • Change of ultrasonic propagation velocity in MR fluid under AC magnetic fields

    Takashi Fukumoto, Yuya Tanaka and Tatsuo Sawada

    International Journal of Applied Electromagnetics and Mechanics (IOS Press)  59 ( 1 ) 335 - 340 2019.01

    Research paper (scientific journal), Joint Work, Accepted,  ISSN  1383-5416

     View Summary

    This paper reports the experimental studies on a magneto-rheological (MR) fluid under AC magnetic fields. Magnetic clusters in the MR fluid are formed along the magnetic fields. The ultrasonic propagation velocity changes owing to the presence of clustering structures in the MR fluid. We investigated clustering structures by measuring this change in the ultrasonic propagation velocity. The results indicate that magnetic clusters in the MR fluid depend on the elapsed time, intensity, frequency, and angle of the AC magnetic fields.

  • Frequency response of a liquid sloshing in a rotating, laterally oscillating, cylindrical vessel

    Eisaku Yokose, Yusuke Saito and Tatsuo Sawada

    MATEC Web of Conferences (EDP Sciences)  211   15003(6pp) 2018.10

    Research paper (international conference proceedings), Joint Work, Accepted,  ISSN  2261-236X

     View Summary

    We have investigated the free-surface fluctuations of liquid in a rotating, laterally oscillating, cylindrical vessel. We measured the time-dependent fluid-dynamic pressure instead of the free surface luctuations. From an FFT analysis of the dynamic pressure, we obtained two significant frequencies. They are associated, respectively, with waves that rotate in the same direction, and in the opposite direction, relative to the rotation of the vessel. We also examined these results using linearized wave theory.

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Reviews, Commentaries, etc. 【 Display / hide

  • Ultrasonic propagation properties in magnetic functional fluids under magnetic fields

    Tatsuo Sawada, Takashi Fukumoto, Ahmad Isnikurniawan and Muhammad Agung Bramanty

    Journal of the Japan Society of Applied Electromagnetics and Mechanics (The Japan Society of Applied Electromagnetics and Mechanics)  24 ( 2 ) 86 - 91 2016.06

    Introduction and explanation (scientific journal), Joint Work,  ISSN  0919-4452

     View Summary

    Magnetic and Magnetorheological (MR) fluids are formed by small magnetic particles suspended in a fluid such as water or oils. In the absence of an external magnetic field, these suspensions behave as a non-Newtonian fluid. When an external magnetic field is applied to these fluids, magnetic dipole moments are induced in the magnetic particles and many clusters of magnetic particles are formed along the magnetic field direction. Since magnetic and MR fluids are opaque, it is very difficult to analyze the inner structure using common optical methods. Ultrasonic propagation velocity and attenuation in magnetic and MR fluids change with the application of an external magnetic field. It seems that the formation of clustering structures influences on ultrasonic propagation properties. Therefore, the author proposed a qualitative analysis of these structures by measuring properties of ultrasonic propagation. In this review article, we summarized our previous experimental results.

  • Characteristics of Tuned Liquid Dampers using a Magnetic Fluid

    Tatsuo Sawada and Ken-ichi Ohno

    Journal of the Japanese Society for Experimental Mechanics (The Japanese Society of Experimental Mechanics)  12 ( 4 ) 284 - 287 2012.12

    Introduction and explanation (scientific journal), Joint Work,  ISSN  1346-4930

     View Summary

    This is the review article for tuned liquid dampers using a magnetic fluid.

  • Investigation of cluster formation in magnetic fluids based on ultrasonic propagation properties

    Tatsuo Sawada and Masaaki Motozawa

    Journal of the Japan Society for Abrasive Technology (The Japan Society for Abrasive Technology)  52 ( 5 ) 250 - 253 2008.05

    Introduction and explanation (scientific journal), Joint Work

     View Summary

    磁性流体研磨に関連して,磁性流体中のクラスタ形成評価のために超音波伝播特性計測を利用する事について特集記事として執筆した。

  • Application of Ultrasonic Technique for Investigation of Inner Structure of Magnetic Fluids

    Tatsuo Sawada, Masaaki Motozawa and Ryo Hasegawa

    Journal of the Visualization Society of Japan (Visualization Society of Japan)  27 ( 105 ) 117 - 122 2007.04

    Introduction and explanation (scientific journal), Joint Work,  ISSN  0916-4731

     View Summary

    This is the review article for application of the ultrasonic technique to magnetic fluids.

  • ドイツ・アーヘン工科大学の計算機事情

    澤田達男

    bit別冊 知のキャンパス-大学における情報教育環境 (共立出版)  23 ( 4月 ) 196 1991.04

    Introduction and explanation (commerce magazine), Single Work

     View Summary

    アーヘン工科大学の計算機環境について概説した。

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Presentations 【 Display / hide

  • Influence of magnetic field on flow resistance of a magneto-rheological fluid damper

    Yuta Fukuoka, Kojiro Matsuzaka and Tatsuo Sawada

    The 32th Symposium on Electromagnetics and Dynamics (Gifu) , 2020.05, Oral Presentation(general), JSAEM

  • Application of pendulum theory to a model of the overturning of a rectangular hull in a water tank

    Yuji Doya and Tatsuo Sawada

    The 11th International Workshop on Ship and Marine Hydrodynamics (Hamburg) , 2019.09, Oral Presentation(general), Hamburg University of Technology

     View Summary

    This paper reports an experimental study of applying pendulum theory to determine whether a rectangular model of a hull would overturn. A pontoon used as a non-self-navigating work vessel was considered in this study. Its model begins to list when an unbalanced load is applied. It can then either stabilize in an inclined state or continue overturning, throwing the unbalanced load midway, and finally stabilizing in the inverted position. In a mid-air experiment, this correlation was made between two motion scenarios, pendular or rotational motion. The two motions were reproduced by changing the distance between the hull center and the rotary axis and the mass of the weight. The experimental results closely matched those of an analytical analysis performed based on the Runge-Kutta method, which confirms the validity of the proposed analysis.

  • Ultrasonic propagation wave velocity in MR fluid at magnetic field sweep rates

    Ryo Kanasashi, Yuya Tanaka, Tatsuo Sawada

    The Eleventh Japanese-Mediterranean Workshop on Applied Electromagnetic Engineering for Magnetic, Superconducting, Multifunctional and Nanomaterials (Batumi) , 2019.07, Poster (general), Batumi Shota Rustaveli State University

     View Summary

    The ultrasonic wave propagation velocities of MR fluid under DC and AC magnetic fields were examined. Experiments were conducted to investigate the effect of magnetic field sweep rate on the cluster formation in MR fluid.

  • Self-dumping pontoons for emergency measures during large-scale natural disasters

    Yuji Doya, Tatsuo Sawada

    The General Meeting of Japan Society of Fujiology (Mishima) , 2019.07, Oral Presentation(general), Japan Society of Fujiology

  • Ultrasonic propagation characteristics in MR fluid under magnetic fields

    Yuya Tanaka, Ryo Kanasashi and Tatsuo Sawada

    JSME Fluids Engineering Conference 2018 (Muroran) , 2018.11, Poster (general), JSME

     View Summary

    MR fluid is one of the functional fluids affected by the magnetic. When a magnetic field is applied to MR fluid, MR fluid can change its property because of clustering structure. We measure the ultrasonic propagation property through MR fluid under AC magnetic fields. We use two indexes: ultrasonic velocity change rate and attenuation rate. Based on the experimental results, we analyze the clustering structure in MR fluid.

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Works 【 Display / hide

  • 回転平板によって生じる容器内の渦

    澤田達男,Thomas Leweke

    流れの可視化写真集, No.7, 46-47, 

    1990.07

    Other, Joint

     View Details

    回転平板によって生じる出発渦を色素注入法によって可視化した。

  • 二重円管内における磁性流体の自然対流に及ぼす磁場の影響

    齋藤敦,木倉宏成,澤田達男,棚橋隆彦

    流れの可視化写真集, No.7, 2-5, 

    1990.07

    Other, Joint

     View Details

    二重円筒管内の磁性流体自然対流が印加磁場によって変化する様子を温度場の可視化によって表現した。

  • 電磁場による自然対流・磁気対流の制御

    齋藤敦,澤田達男,棚橋隆彦

    流れの可視化写真集, No.6, 20-25, 

    1989.07

    Other, Joint

     View Details

    電場や磁場によって磁性流体や水銀の自然対流現象がどのように変化するかを壁面温度分布の可視化によって,定性的に明らかにした。

  • 磁性流体の自然対流の磁場による制御

    齋藤敦,岡永博夫,澤田達男,棚橋隆彦

    流れの可視化写真集, No.5, 32-33, 

    1988.07

    Other, Joint

     View Details

    立方体容器内の磁性流体自然対流における壁面温度分布を可視化した。

  • 磁性流体のスパイク現象

    澤田達男,木倉宏成,棚橋隆彦

    流れの可視化写真集, No.4, 30-31, 

    1987.07

    Other, Joint

     View Details

    磁性流体のスパイク現象の写真を報告した。

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Intellectual Property Rights, etc. 【 Display / hide

  • 固有振動数可変型制振方法および制振制御装置

    Application No.: 特願2005-176237  2005.06 

    Announcement No.: 特開2006-349053  2006.12 

    Patent, Joint, National application

Awards 【 Display / hide

  • 指導学生の受賞:大学院研究奨励賞

    横瀬栄作, 2020.03, 公益社団法人自動車技術会, 水平加振を受ける回転円筒容器内の液体スロッシングにおける周波数応答と波面の挙動

    Type of Award: Awards of National Conference, Council and Symposium.  Country: 日本

     View Description

    大学院研究奨励賞は大学院生の学業の向上発展に資することを目的に設けられたもので,大学院において,自動車に関連した技術分野で優れた研究を行った大学院修了予定者に授与される。

  • 指導学生の受賞:Best Poster Award

    金指 亮, 2019.07, Technical Program Committee of JAPMED’11, Ultrasonic propagation wave velocity in MR fluid at magnetic field sweep rates

    Type of Award: Awards of International Conference, Council and Symposium.  Country: Georgia

     View Description

    GeorgiaのBatumiで開催されたThe Eleventh Japanese-Mediterranean Workshop on Applied Electromagnetic Engineering for Magnetic, Superconducting, Multifunctional and Nanomaterials (JAPMED'11)におけるポスター発表で,The Best Poster Awardが授与された。

  • 日本AEM学会 功績賞

    澤田達男, 2018.10, 日本AEM学会

    Type of Award: Awards of National Conference, Council and Symposium.  Country: 日本

     View Description

    日本AEM学会への多大な貢献があった為

  • 指導学生の受賞:大学院研究奨励賞

    遠藤拓磨, 2018.03, 公益社団法人自動車技術会, 磁場強度によって変化するMR緩衝器の抵抗力に関する研究

    Type of Award: Awards of National Conference, Council and Symposium.  Country: 日本

     View Description

    大学院研究奨励賞は大学院生の学業の向上発展に資することを目的に設けられたもので,大学院において,自動車に関連した技術分野で優れた研究を行った大学院修了予定者に授与される。

  • 指導学生の受賞:第26回MAGDA コンファレンス in 金沢「MAGDA優秀講演論文賞」

    Takashi Fukumoto, 2017.10, 日本AEM学会, 振動磁場下のMR流体中を伝播する超音波の周波数依存性

    Type of Award: Awards of National Conference, Council and Symposium.  Country: Japan

     View Description

    指導学生の講演発表が審査され,受賞した。

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Other 【 Display / hide

  • 慶應義塾大学理工学部機械工学科における倫理教育

    2018年02月

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    日本機械学会技術倫理委員会のWebコラムにおいて,慶應義塾大学理工学部機械工学科の倫理教育について概説した。

  • Introducing Keio University

    2016年02月

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    フランス・ボルドーのENSEIRB-MATMECAにおいて,慶應義塾大学理工学部の紹介に関する講演を,先方理事会および学生達に対して行った。

  • Properties of magnetic functional fluids

    2015年09月

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    インドネシアのスムラン州立大学機械工学科において,磁気機能性流体に関する講演を行った。

  • 磁性流体を用いた制震装置について

    2014年12月

     View Details

    「機能性流体との融合化によるフルードパワーシステムの新展開に関する研究委員会」の研究会において,話題提供として講演を行った。

  • 98式航空エンジン

    2014年

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    慶應義塾大学理工学部所有の98式航空エンジンについて,解説した。

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Courses Taught 【 Display / hide

  • TOPICS IN MULTIDISCIPLINARY SCIENCE

    2020

  • MATHEMATICAL AND PHYSICAL METHODS IN FLUID DYNAMICS

    2020

  • LIBERAL ARTS AND SCIENCES SEMINAR 2

    2020

  • LABORATORY IN SCIENCE

    2020

  • INTRODUCTION TO FLUID MECHANICS

    2020

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Courses Previously Taught 【 Display / hide

  • Mathematical and Physical Methods in Fluid Dynamics

    Keio University, 2018, Autumn Semester, Major subject, Lecture, Within own faculty

  • 流体力学(3年)

    慶應義塾大学理工学部, 2018

  • 応用流体力学(3年)

    慶應義塾大学理工学部, 2018

  • Fluid Mechanics

    Keio University, 2017, Spring Semester, Major subject, Lecture, Within own faculty

  • 流体力学の基礎

    Keio University, 2017, Autumn Semester, Major subject, Lecture, Within own faculty

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Educational Activities and Special Notes 【 Display / hide

  • JAD夏期集中講義

    2009.08

    , Special Affairs

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    シャー・アラム(マレーシア)における2週間のJAD夏期集中講義で,「機械工学概論」を講義した。

  • External Assessor of University of Malaya

    2008.10

    , Evaluation of Educational Capability

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    マラヤ大学の外部評価を行った。

  • JAD夏期集中講義

    2006.08

    , Special Affairs

     View Details

    シャー・アラム(マレーシア)における2週間のJAD夏期集中講義で,「機械工学概論」を講義した。

  • JAD夏期集中講義

    2003.08

    , Special Affairs

     View Details

    バンギ(マレーシア)における2週間のJAD夏期集中講義で,「機械工学概論」を講義した。

  • JAD夏期集中講義

    2002.08

    , Special Affairs

     View Details

    バンギ(マレーシア)における2週間のJAD夏期集中講義で,「機械工学概論」を講義した。

 

Social Activities 【 Display / hide

  • Sato Yo International Scholarship Foundation

    公益財団法人佐藤陽国際奨学財団, Sato Yo International Scholarship Foundation, 

    2020.09
    -
    2022.06
  • The Japan Science and Technology Agency

    The Japan Science and Technology Agency

    2020.08
    -
    2020.12
  • Kanto Student Soft Tennis Association

    Kanto Student Soft Tennis Association

    2014.04
    -
    Present
  • New Energy and Industrial Technology Development Organization

    New Energy and Industrial Technology Development Organization

    2013.04
    -
    2020.03
  • East Asian Circle of Applied Technology Foundation

    公益財団法人東亜留学生育友会, East Asian Circle of Applied Technology Foundation, 

    2012.11
    -
    Present

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Memberships in Academic Societies 【 Display / hide

  • American Society of Mechanical Engineers, 

    1997.09
    -
    2019.06
  • The Japan Society of Applied Electromagnetics and Mechanics, 

    1993.04
    -
    Present
  • The Japanese Society for Multiphase Flow, 

    1987.04
    -
    Present
  • The Japan Society of Fluid Mechanics, 

    1983.07
    -
    Present
  • Visualization Society of Japan, 

    1983.05
    -
    Present

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Committee Experiences 【 Display / hide

  • 2020.05
    -
    Present

    Fellow, Japan Accreditation Board for Engineering Education

  • 2020.01
    -
    2020.07

    Honorary Chairman, The Asia Pacific Symposium of Applied Electromagnetics and Mechanics 2020 (APSAEM 2020)

  • 2019.10
    -
    2020.10

    Member of International Scientific Committee, The 31st International Symposium on Transport Phenomena

  • 2019.06
    -
    2020.03

    技術者教育プログラム認定審査のための主審査員(審査団長), 日本技術者教育認定機構

  • 2019.06
    -
    2020.05

    Controller, The Visualization Society of Japan

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