• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

ナノスケールの非定常流を記述する流体力学の統計力学的検証

Research Project

Project/Area Number 17740260
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Mathematical physics/Fundamental condensed matter physics
Research InstitutionNagoya University (2006-2007)
Institute for Molecular Science (2005)

Principal Investigator

奥村 久士  Nagoya University, 大学院・理学研究科, COE特任講師 (80360337)

Project Period (FY) 2005 – 2007
Project Status Completed (Fiscal Year 2007)
Budget Amount *help
¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 2007: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2006: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2005: ¥700,000 (Direct Cost: ¥700,000)
Keywords分子動力学 / 非平衡統計力学 / 生体分子 / 拡張アンサンブル / シンプレクティック性 / 液体力学 / 熱流体 / レナード・ジョーンズ流体 / 流体力学
Research Abstract

私はマルチバーリック・マルチサーマル分子動力学法を開発した。この方法は自由エネルギー極小値に引っかかることなく、従来の定温定圧法より広い範囲の構造空間をサンプルできる。マルチバーリック・マルチサーマル分子動力学法を水中のアラニンジペプチドに適用した。これまで分子シミュレーションでは各状態間の部分モルエンタルピー差、部分モル体積差を計算することはできなかったが、私はマルチバーリック・マルチサーマル法を用いて構造の温度・圧力依存性を調べることによりこれを可能にした。その結果はラマン散乱実験の結果と良く一致した。
またカノニカルアンサンブル、定温定圧アンサンブルにおける剛体分子のシンプレクティック分子動力学法を開発した。このシンプレクティック分子動力学法を用いるとハミルトニアンに近い保存量が存在する。そのため従来の非シンプレクティック解法よりも安定にシミュレーションをおこなうことができる。
さらに分子動力学法と流体力学計算の比較もおこなった。小さい系では密度などいくつかの物理量については両者が一致しないことをみつけた。こうして流体力学計算が有効な大きさの系から流体力学計算が破綻する系まで系統的に調べ、流体力学が適用できる大きさの限界を明らかにした。

Report

(3 results)
  • 2007 Annual Research Report
  • 2006 Annual Research Report
  • 2005 Annual Research Report
  • Research Products

    (21 results)

All 2007 2006 2005 Other

All Journal Article (13 results) (of which Peer Reviewed: 3 results) Presentation (7 results) Remarks (1 results)

  • [Journal Article] Multibaric-multithermal molecular dynamics simulation of alanine dipep tide in explicit water2007

    • Author(s)
      H. Okumura and Y. Okamoto
    • Journal Title

      Bull. Chem. Soc. Jpn. 80

      Pages: 1114-1123

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Multibaric-multithermal molecular dynamics simulation: Generalized Nose-Poincare-Andersen method2007

    • Author(s)
      H. Okumura and Y. Okamoto
    • Journal Title

      Mol. Sim. 33

      Pages: 91-96

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Generalized-ensemble algorithms for molecular dynamics simulations2007

    • Author(s)
      S. G. Itoh, and H. Okumura and Y. Okamoto
    • Journal Title

      Mol. Sim. 33

      Pages: 47-56

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Explicit symplectic integrators of molecular dynamics algorithms for rigid-body molecules in the canonical, isobaric-isothermal, and related ensembles2007

    • Author(s)
      H.Okumura, S.G.Itoh, Y.Okamoto
    • Journal Title

      J. Chem. Phys. 126

      Pages: 84103-84103

    • NAID

      120006545076

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Hydrodynamics in a Nanoscale Liquid : Comparisons with Molecular Dynamics in Non-stationary Processes2007

    • Author(s)
      H.Okumura
    • Journal Title

      Mol. Phys. 104

      Pages: 3751-3756

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Some physical properties of the Weeks-Chandler -Andersen fluid2006

    • Author(s)
      D.M.Heyes, H.Okumura
    • Journal Title

      Mol. Sim. 32

      Pages: 45-50

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Equation of state and structural properties of the Weeks-Chandler-Andersen fluid2006

    • Author(s)
      D.M.Heyes, H.Okumura
    • Journal Title

      J. Chem. Phys. 124

      Pages: 164507-164507

    • Related Report
      2006 Annual Research Report
  • [Journal Article] First derivative of the hard-sphere radial distribution function at contact2006

    • Author(s)
      D.M.Heyes, M.Cass, A.C.Branka, H.Okumura
    • Journal Title

      J. Phys. : Condens. Matter 18

      Pages: 7553-7558

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Stationary temperature profiles in a liquiad nano-channel : comparisons between molecular dynamics simulation and classical hydrostatics2006

    • Author(s)
      H.Okumura, D.M.Heyes
    • Journal Title

      Phys. Rev. E 74

      Pages: 61201-61201

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Multibaric-multithermal ensemble molecular dynamics simulations2006

    • Author(s)
      H.Okumura, Y.Okamoto
    • Journal Title

      J.Comput.Chem. 27

      Pages: 379-395

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Molecular simulations in the multibaric-multithermal Ensembles2005

    • Author(s)
      H.Okumura, Y.Okamoto
    • Journal Title

      Comput.Phys.Commun. 169

      Pages: 317-321

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Equation of state and structural properties of the Weeks-Chandler-Andersen Fluid

    • Author(s)
      D.M.Heyes, H.Okumura
    • Journal Title

      J.Chem.Phys. (印刷中)

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Some physical properties of the Weeks-Chandler-Andersen Fluid

    • Author(s)
      D.M.Heyes, H.Okumura
    • Journal Title

      Mol.Phys. (印刷中)

    • Related Report
      2005 Annual Research Report
  • [Presentation] Multibaric-multithermal molecular dynamics simulations of alanine dipeptide2007

    • Author(s)
      Hisashi Okumura
    • Organizer
      2007 Taiwan International Workshop on Biological Physics and Complex Systems
    • Place of Presentation
      Academia Sinica, Taipei
    • Related Report
      2007 Annual Research Report
  • [Presentation] Temperature and pressure dependence of a peptide studied by multibaric-multithermal moleculal dynamics simulations2007

    • Author(s)
      Hisashi Okumura
    • Organizer
      2007 NCTS May Workshop on Critical Phenomena and Complex Systems
    • Place of Presentation
      Chinese Culture University, Taipei
    • Related Report
      2007 Annual Research Report
  • [Presentation] Symplectic molecular dynamics integrator for rigid-body molecules in the canonical ensemble2007

    • Author(s)
      Hisashi Okumura
    • Organizer
      2007 NCTS May Workshop on Critical Phenomena and Complex Systems
    • Place of Presentation
      Chinese Culture University, Taipei
    • Related Report
      2007 Annual Research Report
  • [Presentation] Multibaric-multithermal molecular dynamics simulations of alanine dipeptide2007

    • Author(s)
      Hisashi Okumura
    • Organizer
      Conference on Computational Physics 2007
    • Place of Presentation
      Brussels, Belgium
    • Related Report
      2007 Annual Research Report
  • [Presentation] 拡張アンサンブル分子動力学法によるペプチドの研究2007

    • Author(s)
      奥村久士、岡本祐幸
    • Organizer
      第21回分子シミュレーション討論会
    • Place of Presentation
      金沢
    • Related Report
      2007 Annual Research Report
  • [Presentation] マルチバーリック・マルチサーマル分子動力学法によるアラニンジペプチドの力場依存性2007

    • Author(s)
      奥村久士、岡本祐幸
    • Organizer
      日本物理学会第62回年次大会
    • Place of Presentation
      札幌
    • Related Report
      2007 Annual Research Report
  • [Presentation] シンプレクティック拡張アンサンブル法による水中の生体分子の温度・圧力依存性2007

    • Author(s)
      奥村久士、岡本祐幸
    • Organizer
      第1回分子科学討論会
    • Place of Presentation
      仙台
    • Related Report
      2007 Annual Research Report
  • [Remarks]

    • URL

      http://jegog.phys.nagoya-u.ac.jp/~hokumura/index.shtml

    • Related Report
      2007 Annual Research Report

URL: 

Published: 2005-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi