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Development of Reactors and Dialysis Devices without Damaging Fragile Emulsion

Research Project

Project/Area Number14350410
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 化学工学一般
Research InstitutionKobe University

Principal Investigator

OHMURA Naoto(2003)  Kobe University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (50223954)

片岡 邦夫(2002)  神戸大学, 工学部, 教授 (20031081)

Co-Investigator(Kenkyū-buntansha) 大村 直人  神戸大学, 工学部, 助教授 (50223954)
Project Period (FY) 2002 – 2003
Project Status Completed(Fiscal Year 2003)
Budget Amount *help
¥14,200,000 (Direct Cost : ¥14,200,000)
Fiscal Year 2003 : ¥3,800,000 (Direct Cost : ¥3,800,000)
Fiscal Year 2002 : ¥10,400,000 (Direct Cost : ¥10,400,000)
KeywordsEmulsion / Low shear flow / Laminar mixing / Chaotic mixing / Circular Taylor vortex flow / Conical Taylor vortex flow / Isolated mixing region / Multi-phase flow / 層流混合場 / テイラー渦流 / 液-液分散 / 固-液分散 / 層流渦流 / 共軸二重回転円錐反応器 / 乳化重合 / 混合特性 / 流動遷移 / 粒度分布 / コロイド凝集 / 連続操作
Research Abstract

This research aimed to develop new reactors and dialysis devices without damaging fragile materials. A low shear and laminar flow is required for the fragile materials. Hence, chaotic mixing in a laminar flow field is suitable for development of such reactors. First, this research proposed a new design method of mixing field by means of a constructive approach and to discuss applicability of this method to a two-dimensional laminar mixing field. The presented method consisted of an estimation method based on the information entropy theory and a optimization method using a genetic algorithm. A very simple rotating flow is assigned for a basic component. This method successfully searched the very near optimal configuration of the rotating flow for obtaining a well-mixing state. Next, effect of mixing on chemical reactions in circular Taylor vortex flow reactor was experimentally investigated by using a second-order reaction system. The mixing behaviors in the inside of Taylor vortex cell … More s were also observed by a flow-visualization technique. The flow-visualization experiment clearly revealed the existence of two mixing zones within a Taylor vortex cell at low Reynolds numbers. Namely, the fluid flowing near the cell boundary was axially well-mixed, while the fluid element confined to the vortex core region did not collide with cylindrical wall. This vortex, core region can be regarded as an isolated mixing region. It was found in the reaction experiment that the reaction rate was larger in laminar and singly periodic wavy Taylor vortex flow regimes having large isolated mixing region than in quasi-periodic and weakly turbulent Taylor vortex flow regimes. Mixing behaviors in a conical Taylor vortex flow reactor were investigated using flow visualization and salt-solution techniques. Three different flow modes were observed, i.e. a normal steady Taylor vortex flow, an upward motion of the Taylor vortices and helical vortex flow. In the case of the upward traveling motion, the tracer substance was transported with the traveling vortices in the main flow of cross-section and along the secondary flow streamlines at the outer-edge cell boundaries. Less

Report

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

Research Products

(19results)

All Other

All Publications

  • [Publications] M.N.Noui-Mehidi: "Numerical Computation of Apex Angle Effects on Taylor Vortices in Rotating Conical Cylinders Systems"Journal of Chemical Engineering of Japan. 35-1. 22-31 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Takigawa: "Two-Dimensional Mixing Pattern Emerging from a Flow Field Produced by Rotating Cylinders"Theoretical and Applied Mechanics Japan. 51. 293-300 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] M.N.Noui-Mehidi: "Mechanism of Mode Selection for Taylor Vortex Flow between Coaxial Conical Rotating Cylinders"Journal of Fluid and Structures. 16-2. 247-262 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] N.Ohmura: "Effect of Inhomogeneous Mixing on Chemical Reaction in a Taylor Vortex Flow Reactor"Journal of Chemical Engineering of Japan. 35-7. 692-695 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] N.Ohmura: "Observation of Mixing Behaviors in a Conical Taylor-Couette Flow System at Low Reynolds Numbers"Proc.Int.Conf.Fluid and Thermal Energy Conversion 2003. (CD-ROM). 1-8 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] N.Ohmura: "Mixing Characteristics in a Conical Taylor-Couette Flow System at Low Reynolds Numbers"Journal of Chemical Engineering of Japan. 37-4. 546-550 (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] M.N., Nouimehidi: "Numerical Computation of Apex Angle Effects on Taylor Vortices in Rotating Conical Cylinders Systems"Journal of Chemical Engineering of Japan. 35-1. 22-31 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Teiji, Takigawa: "Two-Dimensional Mixing Pattern Emerging from a Flow Field Produced by Rotating Cylinders"Theoretical and Applied Mechanics Japan. 51. 293-300 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] M.N., Nouimehidi: "Mechanism of Mode Selection for Taylor Vortex Flow Mehidi between Coaxial Conical Rotating Cylinders"Journal of Fluid and Structures. 16-2. 247-262 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Naoto, Ohmura: "Effect of Inhomogeneous Mixing on Chemical Reaction in a Taylor Vortex Flow Reactor"Journal of Chemical Engineering of Japan. 35-7. 692-695 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Naoto, Ohmura: "Observation of Mixing Behaviors in a Conical Taylor-Couette Flow System at Low Reynolds Numbers"Proc.Int.Conf.Fluid and Thermal Energy Conversion 2003. (CD-ROM). 1-8 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Naoto, Ohmura: "Mixing Characteristics in a Conical Taylor-Couette Flow System at Low Reynolds Numbers"Journal of Chemical Engineering of Japan. 37-4. 546-550 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Naoto Ohmura: "Transition of Organized Flow Structure in a Stirred Vessel at Low Reynolds Numbers"Journal of Chemical Engineering of Japan. Vol.36・No.12. 1458-1463 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Naoto Ohmura: "Observation of Mixing Behaviors in a Conical Taylor-Couette Flow System at Low Reynolds Numbers"Proceedings of the International Conference on Fluid and Thermal Energy Conversion 2003, Bali, Indonesia. (CD-ROM). 006-1-006-8 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Naoto Ohmura: "Mixing Characteristics in a Conical Taylor-Couette Flow System at Low Reynolds Numbers"Journal of Chemical Engineering of Japan. Vol.37・No.4(掲載決定). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Naoto Ohmura: "Time-Dependent Flow Properties in Doubly Periodic and Weakly Turbulent Wavy Vortex Flow in a Taylor-Couette Flow System"Journal of Chemical Engineering of Japan. Vol.37・No.4(掲載決定). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] M.N.Noui-Mehidi, N.Ohmura, K.Kataoka: "Numerical Computation of Apex Angle Effects on Taylor Vortices in Rotating Conical Cylinders Systems"Journal of Chemical Engineering of Japan. 35-1. 22-31 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] M.N.Noui-Mehidi, N.Ohmura, K.Kataoka: "Mechanism of Mode Selection for Taylor Vortex Flow Between Coaxial Conical Rotating Cylinders"Journal of Fluids and Structures, Academic Press. 16-2. 247-262 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] K.Kataoka, N.Ohmura, T.Yano, S.Matsuzaki: "Effect of Nonlinear Coupling Between Transport and Reaction Dynamics in Polymerization Processes"Progress in Transport Phenomena, ed. By S. Dost et al., Elsevier, Paris (Proc. 13^<th> Int. Symp. On Transport Phenomena). 491-496 (2002)

    • Related Report
      2002 Annual Research Report

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

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