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DIRECT SIMULATION AND LARGE EDDY SIMULATION OF UNSTEADY FLOW INCLUDING SEPERATION,VORTEX MOTION AND TURBULENCE

Research Project

Project/Area Number 07044323
Research Category

Grant-in-Aid for International Scientific Research.

Allocation TypeSingle-year Grants
Research InstitutionUniversity of Tokyo

Principal Investigator

KOBAYASHI Toshio  University of Tokyo, Institute of Industrial Science, Professor, 生産技術研究所, 教授 (50013206)

Co-Investigator(Kenkyū-buntansha) LIU Hong  Chinese Academy of Science, Research Assistant, 力学研究所, 助手
YUAN Li  Chinese Academy of Science, Research Assistant, 力学研究所, 助手
MA Yanwen  Chinese Academy of Science, Professor, 力学研究所, 教授
FU Dexun  Chinese Academy of Science, Professor, 力学研究所, 教授
OSHIMA Mari  University of Tokyo, Institute of Industrial Science, Research Assistant, 生産技術研究所, 助手 (40242127)
TANIGUCHI Nobuyuki  University of Tokyo, Institute of Industrial Science, Associate Professor, 生産技術研究所, 助教授 (10217135)
Project Period (FY) 1995
Project Status Completed (Fiscal Year 1995)
KeywordsComputational fluid dynamics / Turbulent flow / Direct numerical simulation / Large eddy simulation / HIgh order accurate scheme / Vortex / Flow separation
Research Abstract

A purpose of this co-labolation research was to establish an accurate and effective method for the numerical simultion of unsteady flows with seperation and vortexes, esppecially using a direct numerical simulation (DNS) and a large eddy simulation (LES) of turbulence. For this purpose high-order accuracy schemes and boundary conditions were developed in the mathematical view and LES turbulence models were also examined from an physical analysis of turbulence structures.
The above reseach had been performed in numerical methods of the compressible flow, high order accurate schemes and their application to the direct turbulence simulation by Chinese researchers, and also in numerical methods of the incompressible flows, boundary condition and their application to the large eddy simulation by Japanese researchers. This co-laboration promoted a development of more accurate and effective research in turbulence phenomena by an interaction between the both sides.
The unsteady flows with the se … More perations and votexes are popular in the engineering, but have not been predicted correctly enough by a widely used Reynolds averaging model. The LES is expected to be applied generally and accurately to verious types of flows because it simulates a large scale part of turbulence motion directily. However, several problems should be researched before it is applied to the engineering : in mathematical view, 1) effective algorithms for the time marching analysis, 2) reducing numerical errors caused from the boundary conditions, 3) avoiding instability in the high order accuracy schemes, 4) boundary fitting method to the comlicated geometry, and also in the physical analysis, 5) development and validation of the LES turbulence models, 6) analysis of turbulence structures by the visualized data. Finally a large scale computation for the LES and DNS can be performed accurately and effectively enough.
In 1995 budget year these researches were proceeded as fillows :
Chinese researches investigated in
a) development of stable and high order schemes with compact formulation,
b) direct numarical simulation of the compressible turbulent shear flow. Japanese researchers investigated in
c) instability and accuracy of the unsteady boundary conditions,
d) development of dynamic models for the LES,
e) large eddy simulations using the boundary fitted and unstructured grids, and also joint researches are performed in
f) analysis of the visualization of the compressible shear flows by the DNS.
g) applying the high order schemes to the incompressible flow simulations.
This co-laboration has been proceeded by exchanging information constantly through an internet and also by visiting each other for discussing more detail. A part of this co-laboration results has been presented in an international symposium and will be published in an international journal coauthorized by the researchers from both Chinese and japanese side. This research program will be continued and extended to wider application of the DNS and LES to both the compressible and the incompressible turbulent flows. Less

Report

(1 results)
  • 1995 Final Research Report Summary
  • Research Products

    (34 results)

All Other

All Publications (34 results)

  • [Publications] T.Kobayashi: "Large eddy simulation of turbulent flows in circular and elliptic pipes using the curvilinear coordinate grids" Proc.ASE '95 : Applications of High-performance Computing in Engineering. 141-148 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Y.Dai: "Investigaton of organized structures in plane jet flow by using large eddy simulation" 10th Symp. on Turbulent Shear Flow. 1. 9-25-29 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] M.Oshima: "Computatonal visualization of magnetic field effects on flow and temperature fields in a silicon melt flow" ASME FED 218. 1-6 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] M.Tsubokura: "Large eddy simulation of turbulent channel flow using an unstructured mesh" ASME FED 215. 81-87 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] H.Izumi: "Three-dimensional flow analysis around a stationary circular cylinder" ASME FED 217. 167-174 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] N.Taniguchi: "High-order accuracy schemes for incompressible flow simulation based on FM on unstructured grid" Proc.6th Symp.on Computaional Fluid Dynamics. 3. 1249-1254 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Kobayashi: "Three-dimensional flow simulation in a torque converter" Proc.IPC-8. 317-321 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Kogaki: "Large eddy simulation of flow around a rectangular" Proc.Int.Symp.on Mathematical Modeling of Turbulent Flows. 217-222 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] D.Fu: "Direct numerical simulation of compressible mixing layer with high-order accurate scheme" Proc.6th ISCFD. 1. 328-243 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] D.Fu: "High order accurate schemes and numerical simulation of compressible mixing layers" Proc.6th ISCFD. (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Y.Ma: "Super compact schemes with uniform and non-uniform grid system" Prod.6th ISCFD. (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] L.Yuan: "Simulation of axisymmetric and spiral Taylor vortices between concentric rotating spheres" Science in Chine Ser.A. No.5. (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] D.Fu: "Nonphysical oscillations in numerical solutions-reason and improvement" Jour.of Computational Fluid Dyanmics. (to appear). (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] D.Fu: "Numerical simulation of coherent structure of 2-D compressible mixing layers" Science in Chaina Ser.A. 39 (to appear). (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Y.Ma: "Nonphysical oscillations in numerical solutions and their improvement" Proc.Asia Workshop on Computational Fluid Dynamics. (to appear). (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] D.Fu: "Effect of compressibility on coherent structures in mixing layers" Proc.Asia Workshop on Computational Fluid Dynamics. (to appear). (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] D.Fu (edited by M.Hofez & K.Oshima): "Computational Fluid Dynamics Review" John Wiley & Sons, (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Kobyashi: "Large eddy simulation of turbulent flows in circular and elliptic pipes using the curvilinear coordinate grids" JSME Int.Jour. (B). 37-2. 141-148 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Y.Dai: "Investigation of organized structures in plane jet flw by using large eddy simulation" 10th Symp.on Turbulent Shear Flow. 1. 1-6 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] M.Oshima: "Computational visualization of magnetic field effects on flow and temperature fields in a silicon melt flow" ASME FED 218. 1-6 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] M.Tsubokura: "Large eddy simulation of turbulent channel flow using an unstructured mesh" ASME FED 215. 81-87 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] H.Izumi: "Three dimensional flow analysis around a stationary circular cylinder" ASME FED 217. 167-174 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] N.Taniguchi: "High-order accuracy schemes for incompressible flow simulation based on FM on unstructured grid" Proc.6th Symp.on Computational Fluid Dynamics. 3. 1279-1254 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Kobayashi: "Three-dimensional flow simulation in a toruqe converter" Proc.IPC-8. 317-321 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Kogaki: "Large eddy simulation of flow around a rectangular" Proc.Int.Symp.on Mathematical Modeling of Turbulent. 217-222 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] D.Fu: "Direct snumerical simulation of compressible mixing layr with high-order accurte scheme" Proc.ISCFD. 1. 323-243 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] D.Fu: "High order accurate schemes and numerical simulation of compressible mixing layrs" Proc.ISCFD. (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Y.Ma: "Super compact schemes with uniform and non-uniform grid system" Proc.ISCFD. (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] L.Yuan: "Simulation of axisymmetric and spiral Taylor vortices between concentric rotating spheres" Science in Chaina Ser.A. No.5. (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] D.Fu: "Nonphysical oscillations in numerical solutions-reason and improvement" Jour.of Computational Fluid Dynamics. (to appear). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] D.Fu: "Numerical simulation of coherent structure of 2-D compressible mixing layrs" Science in China Ser.A. (to appear). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] D.Fu: "Effect of compessibility on coherent structures in mixing layrs" Proc Asia Workshop on Computational Fluid Dynamics. (to appear). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Y.Ma: "Nonphysical oscillations in numerical solutions and their improvement" Proc Asia Workshop on Computational Fluid Dynamics. (to appear). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] D.Fu (ed.by M.Hofez & K.Oshima): John Wiley & Sons. Computational Fluid Dynamics Review, (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary

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Published: 1997-03-04   Modified: 2016-04-21  

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