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

Turbulent Flow Characteristics and Modeling on Dispersed Two-Phase Flow

Research Project

Project/Area Number 03452125
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Fluid engineering
Research InstitutionKeio University

Principal Investigator

MAEDA Masanobu  Keio University, Department of Mechanical Engineering, Professor, 理工学部, 教授 (90051466)

Co-Investigator(Kenkyū-buntansha) HISHIDA Koichi  Keio University, Department of Mechanical Engineering, Associate Professor, 理工学部, 助教授 (40156592)
Project Period (FY) 1991 – 1992
Project Status Completed (Fiscal Year 1992)
Budget Amount *help
¥4,400,000 (Direct Cost: ¥4,400,000)
Fiscal Year 1992: ¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1991: ¥2,500,000 (Direct Cost: ¥2,500,000)
KeywordsTwo-phase Flow / Gas-solid flow / Particle dispersion / LDV measurement / レーザ流速計 / レ-ザ流速計
Research Abstract

An experiment study has been carried out concerning the dispersion of solid particles in a wake region of a pair of circular cylinders. Two cylinders were arranged in parallel, where the distance s between cylinders were set at s/d=0.3 and 2.0, and the air velocity around the cylinders at 10m/s. Spherical grass particles of 42mum in mean diameter were loaded at the center of the space between the cylinders.
For the single-phase flow, large scale eddy was observed in the wake region by the flow visualization. Strouhal number varied with the distance between the cylinders.
For the two-phase flow, the particles began to disperse after reaching the flow region of the wake over the wide distance between the cylinders. Under the condition, the particles disperse gradually because the flow field has no vortex interaction. For the narrow gap between the cylinders, the particles dispersed rapidly. The flow field has an interaction between the vertices in the wake region. A large entrainment force act on the particles while the vertices interact with each other. The Stokes number, which is defined as the ratio of particle relaxation time and characteristic time scale of the large scale vortex, is confirmed to be a dominant factor for the particle dispersion.

Report

(3 results)
  • 1992 Annual Research Report   Final Research Report Summary
  • 1991 Annual Research Report
  • Research Products

    (9 results)

All Other

All Publications (9 results)

  • [Publications] Hishida,K.,Ando,A.and Maeda,M.: "Experiments on Particle Dispersion in a Turdulent Mixing Layer." Inremational Joumal of Multiphase Flow. 18. 181-194 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Ishima,T.,Hishida,K.and maeda,M: "Effect of Particle Residence Time on Particle Dispersion." ASME Jourmal of Fluid Engineering.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Hishida,K., Ando,A. and Maeda,M.: ""Experiments on Particle Dispersion in a Turbulent Mixing Layer,"" International Journal of Multiphase Flow. Vol.18. 181-194 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Ishima,T., Hishida,K. and Maeda,M.: ""Effect of Particle Residence Time on Particle Dispersion,"" Transactions of the ASMEJFE.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Hishida,K.,Ando,A.and Maeda,M.: "Experiments on Particle Dispersion in a Turbulent Mixing Layer." Interational Jouunal of Multiphase Flow. 18. 181-194 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] Ishima,T.,Hishida,K.and Maeda,M: "Effect of Particle Residence Time on Particle Dispersion." ASME Journal of Fluid Engineering(1993年12月).

    • Related Report
      1992 Annual Research Report
  • [Publications] T.Ishimチ,K.Hishida and M.Maeda: "Particle dispersion in turbulent mixing layer:Effect of particle interaction time in eddy motion of gas phase" Proc.of the international conference on multiphase flows '91ーTsukuba. 2. 69-72 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] K.Hishida,A.Ando and M.Maeda: "Experiments on particle dispersion in a turbulent mixing layer" Int.J.Multiphase.

    • Related Report
      1991 Annual Research Report
  • [Publications] T.Ishima,K.Hishida and M.Maeda: "Effect of particle residence time on particle dispersion in a plane mixing layer" Trans.ASME J.Fluid Engineering.

    • Related Report
      1991 Annual Research Report

URL: 

Published: 1991-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi