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Establishment of a Method for Precisely Controlling Mixing/Reaction in Stirred Vessels Utilizing Dynamic Changes of Flow Patterns

Research Project

Project/Area Number 16560656
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Properties in chemical engineering process/Transfer operation/Unit operation
Research InstitutionKobe University

Principal Investigator

OHMURA Naoto  Kobe University, Faculty of Engineering, Professor, 工学部, 教授 (50223954)

Project Period (FY) 2004 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2005: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 2004: ¥2,300,000 (Direct Cost: ¥2,300,000)
KeywordsStirred Vessel / Flow Pattern / Cylindrical Taylor Vortex Flow / Conical Taylor Vortex Flow / Dynamic Process / Particle Classification / Continuous Emulsion Polymerization / Particle Aggregation / 非線形現象
Research Abstract

This research project focused on dynamic changes of flow patterns in stirred vessels and aimed to establish of a method for precisely controlling mixing and/or reaction utilizing these phenomena from engineering aspect. Characteristics of mixing and particle dispersion in cylindrical and Conical Taylor vortex flow systems were investigated as a model for secondary circulating flow in a stirred vessel. At low Reynolds numbers, the fluid flowing near the vortex cell boundary was axially well-mixed, while the fluid element confined to the vortex core region poorly exchanged with the outer well-mixed flow region. Particle classification phenomena were also observed in Taylor vortex flow. The larger particle ranging from 50 to 80 μm could be seen in the outer region of vortex, while the smaller particles ranging from 20 to 50 mm were mainly observed in the vortex core region. We proposed a new particle classification device by combining these mixing and particle dispersion characteristics. … More In a conventional stirred vessel with Rushton turbine impeller, When the ratio of the impeller off-bottom clearance, C, to the tank inner diameter, T, is larger than 0.143 (C/T>0.143), the discharged stream was directed horizontally towards the walls whre it split into two streams that moved upwards and downwards generating two vortices (a double-loop pattrn). On the other hand, when C/T>0.143, the discharged stream moved downwards the bottom of vessel owing to the Coinda effect and then continued upwards to generate a strong vortex (a single-loop pattern). No transitional time-dependent flow state from a single to double-loop pattern could be seen at low Reynolds numbers. In future work, we will try to produce the transitional flow state by adding an appropriate perturbation. From the viewpoint of reaction control, continuous emulsion polymerization of vinyl acetate was conducted. It has been found that particle size distribution of latex particles oscillates with a very large time period owing to the effect of coupling reaction, mixing and particle aggregation dynamics. This research project successfully developed a stochastic model which considers the competitive interaction between polymerization reaction and aggregation of latex particles. Less

Report

(3 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • Research Products

    (33 results)

All 2006 2005 2004

All Journal Article (29 results) Patent(Industrial Property Rights) (4 results)

  • [Journal Article] Dynamics of the Helical Flow between Rotating Conical Cylinders2005

    • Author(s)
      Mohamed Nabil Noui-Mehidi
    • Journal Title

      Journal of Fluids and Structures 20・3

      Pages: 331-334

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] A Numerical Study of Taylor Vortex Flow in a Finite Length Tapered Annulus2005

    • Author(s)
      Mohamed Nabil Noui-Mehidi
    • Journal Title

      Journal of Physics : Conference Series 14

      Pages: 20-29

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] Particle Classification in Taylor Vortex Flow with an Axial Flow2005

    • Author(s)
      Naoto Ohmura
    • Journal Title

      Journal of Physics : Conference Series 14

      Pages: 64-71

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] Emulsion Polymerization of Vinyl Acetate in a System of Two CSTR in Series2005

    • Author(s)
      Naoto Ohmura
    • Journal Title

      Journal of Chemical Engineering of Japan 38・9

      Pages: 722-726

    • NAID

      130005053077

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Modeling Dynamic Behaviour of Particle Size Distribution in Continuous Emulsion Polymerization2005

    • Author(s)
      Naoto Ohmura
    • Journal Title

      Proceedings of the 7th World Congress of Chemical Engineering (CD-ROM)

      Pages: 1-8

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Dynamics of the Helical Flow between Rotating Conical Cylinders2005

    • Author(s)
      M.N.Noui-Mehidi, N.Ohmura, K.Kataoka
    • Journal Title

      Journal of Fluids and Structures 20-3

      Pages: 331-344

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] A Numerical Study of Taylor Vortex Flow in a Finite Length Tapered Annulus2005

    • Author(s)
      M.N.Noui-Mehidi, N.Ohmura, J.Wu
    • Journal Title

      Journal of Physics : Conference Series 14

      Pages: 20-29

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Particle Classification in Taylor Vortex Flow with an Axial Flow2005

    • Author(s)
      N.Ohmura, T.Suemasu, Y.Asamura
    • Journal Title

      Journal of Physics : Conference Series 14

      Pages: 64-71

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Emulsion Polymerization of Vinyl Acetate in a System of Two CSTR in Series2005

    • Author(s)
      N.Ohmura, M.Nagamatsu, K.Kondo, T.Yano, H.Usui
    • Journal Title

      Journal of Chemical Engineering of Japan 38-9

      Pages: 722-726

    • NAID

      130005053077

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Modeling Dynamic Behaviour of Particle Size Distribution in Continuous Emulsion Polymerization2005

    • Author(s)
      N.Ohmura, K.Endo, Y.Ando, M.Nagamitsu, T.Yano
    • Journal Title

      Proceedings of the 7th World Congress of Chemical Engineering (CD-ROM)

      Pages: 1-8

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Dynamics of the Helical Flow between Rotating Conical Cylinders2005

    • Author(s)
      Mohamed Nabil Noui-Mehidi
    • Journal Title

      Journal of Fluids and Structures 20

      Pages: 331-344

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Emulsion Polymerization of Vinyl Acetate in a System of Two CSTR in Series2005

    • Author(s)
      Naoto Ohmura
    • Journal Title

      Journal of Chemical Engineering of Japan 38

      Pages: 722-726

    • NAID

      130005053077

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Modeling Dynamic Behaviour particle size distribution in continuous emulsion polymerization2005

    • Author(s)
      Naoto Ohmura
    • Journal Title

      Proceedings of the 7th World Congress of Chemical Engineering (CD-ROM)

      Pages: 1-8

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Time-Dependent Structures of a Two-Dimensional Turbulent Impinging Jet Accompanied by Longitudinal Vortex Pairs2004

    • Author(s)
      Kunio Kataoka
    • Journal Title

      Journal of Chemical Engineering of Japan 37・2

      Pages: 299-303

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary 2004 Annual Research Report
  • [Journal Article] Effect of the Emulsifier on the Dynamic Behavior of Particle Size Distribution in Continuous emulsion Polymerization of Vinyl Acetate2004

    • Author(s)
      Naoto Ohmura
    • Journal Title

      Journal of Chemical Engineering of Japan 37・3

      Pages: 461-464

    • NAID

      10013339911

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Mixing Characteristics in a Conical Taylor-Couette Flow System at Low Reynolds Numbers2004

    • Author(s)
      Naoto Ohmura
    • Journal Title

      Journal of Chemical Engineering of Japan 37・4

      Pages: 546-550

    • NAID

      130000019555

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary 2004 Annual Research Report
  • [Journal Article] Time-Dependent Flow Properties in Doubly Periodic and Weakly Turbulent Wavy Vortex Flows in a Taylor-Couette Flow system2004

    • Author(s)
      Naoto Ohmura
    • Journal Title

      Journal of Chemical Engineering of Japan 37・4

      Pages: 572-576

    • NAID

      130000019560

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Emulsion Polymerization of Vinyl Acetate in a System of Two CSTR in Series2004

    • Author(s)
      Naoto Ohmura
    • Journal Title

      Proceedings of the 10th APCChE Congress (CD-ROM)

      Pages: 1-8

    • NAID

      130005053077

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Gap Effect on Taylor Vortex Size between Rotating Conical Cylinders2004

    • Author(s)
      Mohamed Nabil Noui-Mehidi
    • Journal Title

      Proceedings of the 15th Australasian Fluid Mechanics Conference (CD-ROM)

      Pages: 1-4

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Time-Dependent Structures of a Two-Dimensional Turbulent Impinging Jet Accompanied by Longitudinal Vortex Pairs2004

    • Author(s)
      K.Kataoka, T.Ochi, K.Uyama, N.Ohmura
    • Journal Title

      Journal of Chemical Engineering of Japan 37-2

      Pages: 299-303

    • NAID

      10013339506

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Effect of the Emulsifier on the Dynamic Behavior of Particle Size Distribution in Continuous Emulsion Polymerization of Vinyl Acetate2004

    • Author(s)
      N.Ohmura, S.Matsuzaki, K.Kondo, K.Kataoka
    • Journal Title

      Journal of Chemical Engineering of Japan 37-3

      Pages: 461-464

    • NAID

      10013339911

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Mixing Characteristics in a Conical Taylor-Couette Flow System at Low Reynolds Numbers2004

    • Author(s)
      N.Ohmura, M.N.Noui-Mehidi, K.Sasaki, K.Kitajima, K.Kataoka
    • Journal Title

      Journal of Chemical Engineering of Japan 37-4

      Pages: 546-550

    • NAID

      130000019555

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Time-Dependent Flow Properties in Doubly Periodic and Weakly Turbulent Wavy Vortex Flows in a Taylor-Couette Flow System2004

    • Author(s)
      N.Ohmura, T.Aoki, H.Okamoto, K.Kataoka
    • Journal Title

      Journal of Chemical Engineering of Japan 37-4

      Pages: 572-576

    • NAID

      130000019560

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Emulsion Polymerization of Vinyl Acetate in a System of Two CSTR in Series2004

    • Author(s)
      N.Ohmura, M.Nagamitsu, K.Kondo, T.Yano, H.Usui
    • Journal Title

      Proceedings of the 10th APCChE Congress (CD-ROM)

      Pages: 1-8

    • NAID

      130005053077

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Gap Effect on Taylor Vortex Size between Rotating Conical Cylinders2004

    • Author(s)
      M.N.Noui-Mehidi, N.Ohmura, K.Kataoka
    • Journal Title

      Proceedings of the 15th Australasian Fluid Mechanics Conference (CD-ROM)

      Pages: 1-4

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Effect of the Emulsifier on the Dynamic Behavior of Particle Size Distribution in Continuous Emulsion Polymerization of Vinyl Acetate2004

    • Author(s)
      Naoto Ohmura
    • Journal Title

      Journal of Chemical Engineering of Japan 37・3

      Pages: 461-464

    • NAID

      10013339911

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Time-Dependent Flow Properties in Doubly Periodic and Weakly Turbulent Wavy Vortex Flows in a Taylor-Couette Flow System2004

    • Author(s)
      Naoto Ohmura
    • Journal Title

      Journal of Chemical Engineering of Japan 37・4

      Pages: 572-576

    • NAID

      130000019560

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Emulsion Polymerization of Vinyl Acetate in a System of Two CSTR in Series2004

    • Author(s)
      Naoto Ohmura
    • Journal Title

      Proceedings of the 10^<th> APCChE Congress (CD-ROM)

      Pages: 1-8

    • NAID

      130005053077

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Dynamics of the Helical Flow between Rotating Conical Cylinders2004

    • Author(s)
      Mohamed Nabil Noui-Mehidi
    • Journal Title

      Journal of Fluids and Structures 未定(印刷中)

    • Related Report
      2004 Annual Research Report
  • [Patent(Industrial Property Rights)] 粒子の分級方法及び分級装置2006

    • Inventor(s)
      木村直人, 末益智久, 浅村勇一
    • Industrial Property Rights Holder
      (財)新産業創造研究機構
    • Industrial Property Number
      2006-026542
    • Filing Date
      2006-02-03
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Patent(Industrial Property Rights)] 粒子の分級方法及び分級装置2006

    • Inventor(s)
      大村 直人, 末益 智久, 浅村 勇一
    • Industrial Property Rights Holder
      (財)新産業創造研究機構
    • Industrial Property Number
      2006-026542
    • Filing Date
      2006-02-03
    • Related Report
      2005 Annual Research Report
  • [Patent(Industrial Property Rights)] 粒子の分級方法及び分級装置2005

    • Inventor(s)
      木村直人, 末益智久, 浅村勇一
    • Industrial Property Rights Holder
      (財)新産業創造研究機構
    • Industrial Property Number
      2005-027933
    • Filing Date
      2005-02-03
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Patent(Industrial Property Rights)] 粒子の分級方法及び分級装置2005

    • Inventor(s)
      大村 直人, 末益 智久, 浅村 勇一
    • Industrial Property Rights Holder
      (財)新産業創造研究機構
    • Industrial Property Number
      2005-027933
    • Filing Date
      2005-02-03
    • Related Report
      2004 Annual Research Report

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Published: 2004-04-01   Modified: 2016-04-21  

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