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FUNDAMENTAL STUDY ON SIMULATION OF ATMOSPHERIC FLOW PREDICTION WITH DENSITY STRATIFICATION

Research Project

Project/Area Number 14550151
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Fluid engineering
Research InstitutionKYOTO INSTITUTE OF TECHNOLOGY

Principal Investigator

NISHIDA Hodetoshi  KYOTO INSTITUTE OF TECHNOLOGY, FACULTY OF ENGINEERING AND DESIGN, ASSCIATE PROFESSOR, 工芸学部, 助教授 (40164561)

Project Period (FY) 2002 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2003: ¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 2002: ¥700,000 (Direct Cost: ¥700,000)
Keywordsdensity stratification / atmospheric flow / pseudo-compressibility method / finite difference method / incompressible flow / 圧縮性ナビェ・ストークス方程式 / 仮想境界法 / デカルト格子法
Research Abstract

In this research project, the computational codes were developed in order to simulate atmospheric flow problems with density stratification. The governing equations are the incompressible and compressible Navier-Stokes equations. The method of lines (MOL) approach is adopted in both equations. The MOL approach is constructed by the spatial discretization and time integration. In the spatial discretization, the variable order proper convective scheme and the modified differential quadrature method are used for the convection and diffusion terms, respectively. Both discretization techniques give the arbitrary order of spatial accuracy by changing only 1 parameter. And the resulting system of ordinary differential equations in time is integrated by the Runge-Kutta type scheme. In this project, the order of spatial accuracy is fixed by the second order. Also, the virtual boundary method is incorporated into the method. Usually, the flows with complicated. geometry are computed on the bound … More ary fitted coordinate (BFC) system. However, the BFC system has the lack of efficiency. Instead of the BFC, in the virtual boundary method, the computation is carried out on the Cartesian grid. Moreover, the local mesh refinement technique is used for obtaining the high resolution.
The present method is applied to flows around a circular cylinder and the results are in very good agreement with other computational results. The computational time is 2/3 times the uniform Cartesian grid. Then, the flows around a sphere are simulated up to Reynolds number Re=1000. In Re=1000, the transition from laminar to turbulent flow can be reappeared. The flow around multi-spheres is simulated and the results show that the released vortices are interacted each other. Also, the flows over an isolated mountain is simulated in order to investigate the effect of density stratification. The results show clearly that the vortex structure behind of the mountain is different by the density stratification.
These results are opened by the international conferences. Then, it is concluded that the present method is very promising for the environmental simulations. Less

Report

(3 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • Research Products

    (22 results)

All Other

All Publications (22 results)

  • [Publications] H.NISHIDA: "Higher Order Wall Boundary Conditions for Incompressible Flow Simulations"Proc.of the 5^<th> Asian Computational Fluid Dynamics Conference. 122-129 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.NISHIDA, S.NAKAI, N.SATOFUKA: "Parallel Efficiency of a Variable Order Method of Lines"Parallel Computational Fluid Dynamics - New Frontiers and Multi-Discipinary Applications (Elsevier). 321-328 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 芳松克則, 石原卓, 金田行雄, 中井聡, 西田秀利, 里深信行: "3次元一様等方性乱流の直接数値シミュレーションにおけるスペクトル法と高次精度差分法との比較"日本機械学会論文集(B編). 69-679. 541-546 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 織田剛, 里深信行, 西田秀利: "標位関数法による液体へ侵入する固体粒子挙動の数値解析"日本機械学会論文集(B編). 68-676. 3237-3244 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.NISHIDA, S.NAKAI, N.SATOFUKA: "Massively Parallel DNS of Homogeneous Isotropic Turbulence"Proc.of the 5th JSME-KSME Fluid Engineering Conference. 1449-1454 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.NISHIDA, N.SATOFUKA: "A Variable Order Method of Lines : Accuracy, Conservation and Applications"Lecture Notes in Computational Science and Engineering (Springer). 21. 167-174 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Nishida: "Higher Order Wall Boundary Conditions for Incompressible Flow Simulations"Proc. of the 5_<the> Asian Computational Fluid Dynamics Conference. 122-129 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Nishida: "Parallel Efficiency of a Variable Order Method of Lines"Parallel Computational Fluid Dynamics-New Frontiers and Multi-Disciplinary Applications (Elsevier). 321-328 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Nishida: "Comparison of a Spectral Method with a Higher-Order Finite Difference Method in Direct Numerical Simulations of Three-Dimensional Homogeneous Turbulence"Transactions of the Japan Society for Mechanical Engineers Series B. (In Japanese). 69-679. 541-546 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Nishida: "Numerical Analysis of Particle Behavior Penetrating into Liquid by Level Set Method"Transactions of the Japan Society for Mechanical Engineers, Series B.. 68-676. 3237-3244 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Nishida: "Parallel DNS of Homogeneous Isotropic Turbulence Using Variable Order Method of Lines"Computational Fluid Dynamics 2002 (Springer). 305-310 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Nishida: "Massively Parallel DNS of Homogeneous Isotropic Turbulence"Proc. of the 5th JSME-KSME Fluid Engineering Conference. (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Nishida: "A Variable Order Method of Lines : Accuracy, Conservation and Applications"Lecture Notes in Computational Science and Engineering (Springer). 21. 167-174 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.NISHIDA: "Higher Order Wall Boundary Conditions for Incompressible Flow Simulations"Proc.of the 5^<th> Asian Computational Fluid Dynamics Conference. 122-129 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] H.NISHIDA, S.NAKAI, N.SATOFUKA: "Parallel Efficiency of a Variable Order Method of Lines"Parallel Computational Fluid Dynamics - New Frontiers and Multi-Disciplinary Applications (Elsevier). 321-328 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 芳松克則, 石原卓, 金田行雄, 中井聡, 西田秀利, 里深信行: "3次元一様等方性乱流の直接数値シミュレーションにおけるスペクトル法と高次精度差分法との比較"日本機械学会論文集(B編). 69-679. 541-546 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 織田剛, 里深信行, 西田秀利: "標位関数法による液体へ侵入する固体粒子挙動の数値解析"日本機械学会論文集(B編). 68-676. 3237-3244 (2002)

    • Related Report
      2003 Annual Research Report
  • [Publications] H.NISHIDA, S.NAKAI, N.SATOFUKA: "Massively Parallel DNS of Homogeneous Isotropic Turbulence"Proc. of the 5th JSME-KSME Fluid Engineering Conference. 1449-1454 (2002)

    • Related Report
      2003 Annual Research Report
  • [Publications] H.NISHIDA, N.SATOFUKA: "A Variable Order Method of Lines : Accuracy, Conservation and Applications"Lecture Notes in Computational Science and Engineering (Springer). 21. 167-174 (2002)

    • Related Report
      2003 Annual Research Report
  • [Publications] H.NISHIDA, N.SATOFUKA: "A Variable Order Method of Lines : Accuracy, Conservation and Applications"Lecture Notes in Computational Science and Engineering. 21. 167-174 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] H.NISHIDA, S.NAKAI, N.SATOFUKA: "Parallel Efficiency of a Variable Order Method of Lines"Proc.of Parallel CFD 2002. 250-253 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] H.NISHIDA, S.NAKAI, N.SATOFUKA: "Massively Parallel DNS of Homogeneous Isotropic Turbulence"Proc.of the 5th JSME-KSME Fluid Engineering Conference. 1449-1454 (2002)

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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