Arai, Noriyoshi

写真a

Affiliation

Faculty of Science and Technology, Department of Mechanical Engineering Science for Open and Environmental Systems (Yagami)

Position

Associate Professor

Related Websites

Contact Address

3-14-1 35-107 Hiyoshi, Kohoku-ku, Yokohama

Telephone No.

+81-45-566-1846

Fax No.

+81-45-566-1495

External Links

Other Affiliation 【 Display / hide

  • RIKEN, Computational Astrophysics Laboratory, Visiting researcher

Career 【 Display / hide

  • 2009.04
    -
    2019.03

    Keio University, Leading-edge Laboratory of Science and Technology, Researcher

  • 2009.04
    -
    Present

    RIKEN, Computational Astrophysics Laboratory, Visiting Researcher

  • 2009.04
    -
    2010.03

    THe University of Electro-Communications, Department of Mechanical Engineering and Intelligent Systems, Assistant Professor

  • 2010.04
    -
    2014.03

    The University of Electro-Communications, Department of Mechanical Engineering and Intelligent Systems, Assistant Professor

  • 2012.04
    -
    2013.03

    University of Nebraska-Lincoln, Department of Chemistry, Visiting Assistant Professor

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Academic Background 【 Display / hide

  • 2000.04
    -
    2004.03

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

    University, Graduated

  • 2004.04
    -
    2006.03

    Keio University, School of Science for Open and Environmental Systems, Center for Science of Environment, Resource, and Energy

    Graduate School, Completed, Master's course

  • 2006.04
    -
    2009.03

    Keio University, School of Science for Open and Environmental Systems, Center for Science of Environment, Resource, and Energy

Academic Degrees 【 Display / hide

  • Doctor (Engineering), Keio University, Coursework, 2009.03

    Dissipative Particle Dynamics Simulation for Self-Assembly of Surfactant Solutions and Design of High-Energy Efficiency Nanomotor System

Licenses and Qualifications 【 Display / hide

  • 普通自動車第一種運転免許, 2000.09

  • 初級システムアドミニストレータ資格, 2000.11

 

Research Areas 【 Display / hide

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Thermal engineering (Micro/Nano Engineering)

  • Nanotechnology/Materials / Nanomaterials

  • Nanotechnology/Materials / Nanobioscience

  • Nanotechnology/Materials / Nano/micro-systems

Research Keywords 【 Display / hide

  • Molecular motor system

  • Soft Matter

  • confined system

  • nano particle

  • micelle

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Books 【 Display / hide

  • 高分子材料の事典(仮)

    荒井規允, 朝倉書店, 2021

  • 化学便覧 基礎編 改訂6版

    荒井規允, 泰岡顕治など, 丸善出版, 2020.12

  • データ分析の進め方及びAI・機械学習導入の指南 ~データ収集・前処理・分析・評価結果の実務レベル対応~

    荒井規允, 情報機構, 2020.07

  • 界面活性剤の選び方、使い方事例集

    荒井規允, 技術情報協会, 2019

    Scope: 第2章 第9節「AIによる界面活性剤の性質予測」

  • 人と共生するAI革命 : 活用事例からみる生活・産業・社会の未来展望

    荒井規允, 湯原大輔, 泰岡顕治, エヌ・ティー・エス, 2019

    Scope: 第11章3節「AI活用による材料創製のための分子シミュレーションの高速化と界面活性剤性質予測システムの開発」

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Papers 【 Display / hide

  • A stochastic Hamiltonian formulation applied to dissipative particle dynamics

    Peng L., Arai N., Yasuoka K.

    Applied Mathematics and Computation (Applied Mathematics and Computation)  426 2022.08

    ISSN  00963003

     View Summary

    In this paper, a stochastic Hamiltonian formulation (SHF) is proposed and applied to dissipative particle dynamics (DPD) simulations. As an extension of Hamiltonian dynamics to stochastic dissipative systems, the SHF provides necessary foundations and great convenience for constructing efficient numerical integrators. As a first attempt, we develop the Störmer–Verlet type of schemes based on the SHF, which are structure-preserving for deterministic Hamiltonian systems without external forces, the dissipative forces in DPD. Long-time behaviour of the schemes is shown numerically by studying the damped Kubo oscillator. In particular, the proposed schemes include the conventional Groot–Warren's modified velocity-Verlet method and a modified version of Gibson–Chen–Chynoweth as special cases. The schemes are applied to DPD simulations and analysed numerically.

  • Coarse-Grained Molecular Simulation for Soft Matters

    ARAI Noriyoshi

    Journal of the Japan Society of Colour Material (Japan Society of Colour Material)  95 ( 4 ) 92 - 97 2022.04

    ISSN  0010-180X

  • Simulation study on the effects of the self-assembly of nanoparticles on thermal conductivity of nanofluids

    Tanaka Shogo, Arai Noriyoshi, Kobayashi Yusei

    CHEMICAL PHYSICS LETTERS (Chemical Physics Letters)  785 2021.12

    ISSN  0009-2614

     View Summary

    The mechanisms underlying the thermal conductivity behavior of nanofluids have not been completely clarified thus far. This is due to the various competing factors and the lack of a molecular-level understanding of the heat transfer enhancement of nanofluids. In this study, energy-conserving dissipative particle dynamics simulations were conducted to investigate the effects of the self-assembly of nanoparticles (NPs) on the nanoscale heat transfer properties. We demonstrated that considering the balance between the effects of the distance between the NPs and the solvent and the enhancement in thermal conductivity on adding NPs is important for controlling the thermal conductivity of nanofluids.

  • Effect of chemical design of grafted polymers on the self-assembled morphology of polymer-tethered nanoparticles in nanotubes

    Sato Takumi, Kobayashi Yusei, Arai Noriyoshi

    JOURNAL OF PHYSICS-CONDENSED MATTER (Journal of Physics Condensed Matter)  33 ( 36 )  2021.09

    ISSN  0953-8984

     View Summary

    There is a clear relationship between the self-assembling architecture of nanoparticles (NPs) and their physical properties, and they are currently used in a variety of applications, including optical sensors. Polymer-tethered NPs, which are created by grafting polymers onto NPs to control the self-assembly of NPs, have attracted considerable attention. Recent synthetic techniques have made it possible to synthesize a wide variety of polymers and thereby create NPs with many types of surfaces. However, self-assembled structures have not been systematically classified because of the large number of tuning parameters such as the polymer length and graft density. In this study, by using coarse-grained molecular simulation, we investigated the changes in the self-assembled structure of polymer-tethered NP solutions confined in nanotubes due to the chemical properties of polymers. Three types of tethered polymer NP models were examined: homo hydrophilic, diblock hydrophilic-hydrophobic (HI-HO), and diblock hydrophobic-hydrophilic. Under strong confinement, the NPs were dispersed in single file at low axial pressure. As the pressure increased, multilayered lamellar was observed in the HI-HO model. In contrast, under weak confinement, the difference in the pressure at which the phases emerge, depending on the model, was significant. By changing the chemical properties of the grafted polymer, the thermodynamic conditions (the axial pressure in this study) under which the phases appear is altered, although the coordination of NPs remains almost unchanged. Our simulation offers a theoretical guide for controlling the morphologies of self-assembled polymer-tethered NPs, a novel system that may find applications in nanooptical devices or for nanopatterning.

  • Molecular Insight into the Possible Mechanism of Drag Reduction of Surfactant Aqueous Solution in Pipe Flow

    Kobayashi Yusei, Gomyo Hirotaka, Arai Noriyoshi

    INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES (International Journal of Molecular Sciences)  22 ( 14 )  2021.07

    ISSN  16616596

     View Summary

    The phenomenon of drag reduction (known as the “Toms effect”) has many industrial and engineering applications, but a definitive molecular-level theory has not yet been constructed. This is due both to the multiscale nature of complex fluids and to the difficulty of directly observing self-assembled structures in nonequilibrium states. On the basis of a large-scale coarse-grained molecular simulation that we conducted, we propose a possible mechanism of turbulence suppression in surfactant aqueous solution. We demonstrate that maintaining sufficiently large micellar structures and a homogeneous radial distribution of surfactant molecules is necessary to obtain the drag-reduction effect. This is the first molecular-simulation evidence that a micellar structure is responsible for drag reduction in pipe flow, and should help in understanding the mechanisms underlying drag reduction by surfactant molecules under nonequilibrium conditions.

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Papers, etc., Registered in KOARA 【 Display / hide

Reviews, Commentaries, etc. 【 Display / hide

Presentations 【 Display / hide

  • Clarifying mechanism of water permeation in polymeric membranes and synthetic strategy for water-inhibiting functional polymers

    N Arai, Y. Araki

    6th International Conference on Multifunctional, Hybrid and Nanomaterials (MYMA2019), 

    2019.03

    Poster presentation

  • Dissipative particle dynamics simulation for elucidating relaxation behaviour of telechelic ionomer supramolecular network

    R. Miwatani, N. Arai

    6th International Conference on Multifunctional, Hybrid and Nanomaterials (MYMA2019), 

    2019.03

    Poster presentation

  • Dissipative particle dynamics simulation for self-assembly and rheological properties of nanofluids

    Y. Kobayashi, N. Arai

    6th International Conference on Multifunctional, Hybrid and Nanomaterials (MYMA2019), 

    2019.03

    Poster presentation

  • Structural analysis of cholesteric liquid crystal orientation in nanotube: Dissipative particle dynamics simulation

    H. Tsujinoue, T. Nozawa, N. Arai

    6th International Conference on Multifunctional, Hybrid and Nanomaterials (MYMA2019), 

    2019.03

    Poster presentation

  • Self-assembly of various patchy nanoparticles in nanoslit using molecular simulation

    Y. Kobayashi, N. Arai, K. Nomura

    6th International Conference on Multifunctional, Hybrid and Nanomaterials (MYMA2019), 

    2019.03

    Poster presentation

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Research Projects of Competitive Funds, etc. 【 Display / hide

  • Design of materials with thermo-switching function based on molecular-level understanding of thermal conduction

    2019.11
    -
    2020.10

    The Sumitomo Foundation, Grant for Basic Science Research Projects, Noriyoshi Arai, Principal investigator

  • Molecular Mechanism of Tom's Effect by Self-Assembly of Surfactant Molecules

    2017.04
    -
    2020.03

    MEXT,JSPS, Grant-in-Aid for Scientific Research, Arai Noriyoshi, Grant-in-Aid for Young Scientists (B), Principal investigator

     View Summary

    To investigate the molecular mechanism of the Toms effect, coarse-grained molecular simulations were performed to reproduce the behavior of surfactant aqueous solutions in a tube flow. When the hydrophilic wall of the tube, shear thinning is observed regardless of the concentration of the surfactants, whereas in the hydrophobic tube, Newtonian fluid-like behavior and shear thickening are observed. The tube diameter was extended to reproduce the behavior of the surfactant solution in the turbulent and laminar-to-turbulence transition regions. A shear-induced structure, in which rod-like micelles clustered near the center of the tube, was observed, suggesting that the change in the structure affected the drag reduction.

  • Self-assembled structure of Janus nanoparticles using dissipative particle dynamics simulation

    2013.04
    -
    2015.03

    The University of Electro-Communications, ARAI Noriyoshi, Grant-in-Aid for Young Scientists (B), No Setting

     View Summary

    Self-assembly of nanoparticles is used in various functional materials that are familiar to our daily lives. In other words, the self-assembly and those functions have a strong relation. The Janus nanoparticle is a unique anisotropic nanoparticle that typically has two or more distinct functional surface regions (for example, hydrophobic and hydrophilic regions). In this study, I have performed molecular simulations to investigate morphologies of the self-assembled Janus nanoparticles. As a result, evidence of rich polymorphic structures of the Janus nanoparticles is revealed for the first time, and I found some conditions which are observed highly ordered morphologies tend to form.

Awards 【 Display / hide

  • Presentation Award

    Noriyoshi Arai, 2017.09, 日本機械学会ソフトマターイノベーション, 散逸粒子動力学法を用いたテレケリックポリマー水溶液のせん断流れ下の振る舞い

  • International Conference Paper Presentation Encouragement Award

    Noriyoshi Arai, 2006.09, Keio University, Dissipative Particle Dynamics of surfactant threadlike micellar solutions

 

Courses Taught 【 Display / hide

  • PROJECT LABORATORY IN MECHANICAL ENGINEERING

    2022

  • LABORATORIES IN SCIENCE AND TECHNOLOGY

    2022

  • INDEPENDENT STUDY ON SCIENCE FOR OPEN AND ENVIRONMENTAL SYSTEMS

    2022

  • GRADUATE RESEARCH ON SCIENCE FOR OPEN AND ENVIRONMENTAL SYSTEMS 2

    2022

  • GRADUATE RESEARCH ON SCIENCE FOR OPEN AND ENVIRONMENTAL SYSTEMS 1

    2022

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Media Coverage 【 Display / hide

  • 界面活性剤を利用したホコリ除去について

    テレビ東京, ヒャッキン, 2018.05

Memberships in Academic Societies 【 Display / hide

  • The Heat Transfer Society of Japan, 

    2018.04
    -
    Present
  • Smart Processing Society for Materials, Environment & Energy, 

    2016.04
    -
    2018.03
  • The Japan Society of Mechanical Engineers, 

    2009.04
    -
    Present
  • The Molecular Simulation Society of Japan, 

    2007.04
    -
    Present
  • The Society of Rheology, Japan, 

    2006.04
    -
    Present

Committee Experiences 【 Display / hide

  • 2017.04
    -
    2018.03

    第30回計算力学講演会実行委員副幹事, 日本機械学会計算力学部門

  • 2016.04
    -
    2017.03

    第30回分子シミュレーション討論会実行委員, 分子シミュレーション学会

  • 2016.04
    -
    2017.03

    編集委員, スマートプロセス学会

  • 2015.04
    -
    2019.03

    編集委員, 分子シミュレーション学会

  • 2015.04
    -
    2019.03

    編集委員, 分子シミュレーション学会

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