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2007 Fiscal Year Final Research Report Summary

Development of New Ultrasonic Measurement System for Turbulence and Elucidation of the Limit of Transport in Turbulence

Research Project

Project/Area Number 16206020
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Fluid engineering
Research InstitutionThe University of Tokyo

Principal Investigator

SANO Masaki  The University of Tokyo, Graduate School of Science, Professor (40150263)

Co-Investigator(Kenkyū-buntansha) MURAYAMA Yoshihiro  Tokyo University of Agriuiculture and Engineering, Department of Applied Physics, Associate Professor (60334249)
Project Period (FY) 2004 – 2007
KeywordsRayleigh-Benard Convection / Thermal Turbulence / Ultrasonic Velocimetrv / Coherent Structures in Turbulence / Heat Transport
Research Abstract

Study on turbulence is important for every area of science and technology. Among them thermal turbulence has been popular research subjects, since the prediction of heat transport, diffusion and mixing in thermal turbulence is indispensable fur both fundamental and application researches. In this research project we aimed to develop a new ultrasonic measurement method far thermal turbulence and explore stricture in turbulence to elucidate the scaling law of beat transport due to turbulence. We used mercury as a test liquid. Because, the fact that its kinematic viscosity is low and kinetic boundary layer is thinner than the thermal boundary layer enables us to explore high Rayleigh, high Reynolds number in laboratory Although ultrasonic velocimeter (USV) is known for long time for flow rate measurements, it has never been applied to measurement of turbulence due to limitation in temporal resolution and accessible maximum velocity We succeeded to use USV for thermal turbulence, because t … More he maximum velocity and the highest frequency in thermal turbulence is relatively low even at high Rayleigh number compared with other turbulence, such as grid turbulence and wake turbulence. We developed 3 measurement systems far thermal turbulence 1. Three ultrasonic transducers monitoring along X, Y, and Z axes simultaneously. 2. One moving transducer without destructing the wall of the convection cell. 3. Multi-thermosensors (32 thermistors) embedded in the cell bottom and the side wall which enable us to monitor the structure of the mean flow in thermal turbulence. By using these measurement systems, we successfully measured the energy spectrum directly from instantaneous measurement of the velocity filed without utilizing Taylor hypothesis, and found that Bolgiano-Obkhov scaling law holds in thermal turbulence. We further elucidated structure of the mean flow existing in thermal turbulence. Their structures, dynamics, and stabilities strongly depend on the aspect ratio of the convection cell. Less

  • Research Products

    (30 results)

All 2007 2006 2005 2004

All Journal Article (18 results) (of which Peer Reviewed: 9 results) Presentation (12 results)

  • [Journal Article] Elastic Convection in Vibrated Viscoplastic Fluids2007

    • Author(s)
      H. Shiba, J.R.-Felsot, Y. Takahashi, Y. Murayama, Q. Ouyang, and M. Sano
    • Journal Title

      Phys. Rev. Lett. 98

      Pages: 044501

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Role of unstable periodic orbits in phase transitions of coupled map lattices2007

    • Author(s)
      K. Takeuchi and M. Sano
    • Journal Title

      Phys. Rev. E 75

      Pages: 036201

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Directed Percolation Criticality in Turbulent Liquid Crystals2007

    • Author(s)
      K. A. Takeuchi, M. Kuroda, H. Chate, and M. Sano
    • Journal Title

      Phys. Rev. Lett. 99

      Pages: 234503-1-4

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Elastic Convection in Vibrated Viscoplastic Fluids2007

    • Author(s)
      H. Shiba, J. R.-Felsot, Y. Takahashi, Y. Murayama, Q. Ouyang, M. Sano
    • Journal Title

      Phys. Rev. Lett. 98

      Pages: 044501

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Role of unstable periodic orbits in phase transitions of coupled map lattices2007

    • Author(s)
      K. Takeuchi, M. Sano
    • Journal Title

      Phys. Rev. E 75

      Pages: 036201

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Directed percolation criticality in turbulent liquid crystals2007

    • Author(s)
      K. A. Takeuchi, M. Kuroda, H. Chat\'e, M. Sano
    • Journal Title

      Physical Review Letters 99

      Pages: 234503

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Observation of stable phase jump lines in convection of a twisted nematic liquid crystal2006

    • Author(s)
      S. Tatsumi, M. Sano, A. G. Rossberg
    • Journal Title

      Phys. Rev. E 73

      Pages: 011704

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Aggregated spots and waving loops in a reaction-advection-diffusion system with a global coupling2006

    • Author(s)
      Y. Kobayashi and M. Sano
    • Journal Title

      Phys. Rev. E 73

      Pages: 015104

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Simultaneous measurements of velocity fields in thermal turbulence by USV and PIV2006

    • Author(s)
      T. Mashiko, T. Segawa, M. Sano and Y. Tsuji
    • Journal Title

      Flow Measurement and Instrumentation 17

      Pages: 107-112

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Observation of stable phase jump lines in convection of a twisted nematic liquid crystal2006

    • Author(s)
      S. Tatsumi, M. Sano, A. G. Rossberg
    • Journal Title

      Phys. Rev. E 73(1)

      Pages: 011704

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Aggregated spots and waving loops in a reaction-advection-diffusion system with a global coupling2006

    • Author(s)
      Y. Kobayashi M. Sano
    • Journal Title

      Phys. Rev. E 73

      Pages: 015104(R)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Simultaneous measurements of velocity fields in thermal turbulence by USV and PIV2006

    • Author(s)
      T. Mashiko, T. Segawa, M. Sano, Y. Tsuji
    • Journal Title

      Flow Measurement and Instrumentation 17

      Pages: 107-112

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Mean Wind in Convective Turbulence of Mercury2005

    • Author(s)
      Y. Tsuji, T. Mizuno, T. Mashiko, and M. Sano
    • Journal Title

      Phys. Rev. Lett. 94

      Pages: 034501

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Mean Wind in Convective Turbulence of Mercury2005

    • Author(s)
      Y. Tsuji, T. Mizuno, T. Mashiko, M. Sano
    • Journal Title

      Phys. Rev. Lett. 94

      Pages: 034501

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Measurement of Velocity Field in Thermal Turbulence in Mercury by Ultrasonic Doppler Metho2004

    • Author(s)
      T. Mashiko, Y. Tsuji, T. Mizuno, and M. Sano
    • Journal Title

      Theor. Appl. Mech. Jpn. 53

      Pages: 207-214

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Anomalous Collective Diffusion in One-dimensional Driven Granular Media2004

    • Author(s)
      Y. Kobayashi and M. Sano
    • Journal Title

      Phys. Soc. Jpn, 73, 2697-2700 73

      Pages: 2697-2700

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Measurement of Velocity Field in Thermal Turbulence in Mercury by Ultrasonic Doppler Method2004

    • Author(s)
      T. Mashiko, Y. Tsuji, T. Mizuno, M. Sano
    • Journal Title

      Theor. Appl. Mech. Jpn. 53

      Pages: 207-214

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Anomalous Collective Diffusion in One-dimensional Driven Granular Media2004

    • Author(s)
      Y. Kobayashi, M. Sano
    • Journal Title

      J. Phys. Soc. Jpn 73

      Pages: 2697-2700

    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Measurement of Fluctuations in Nonequilibrium Small Systems2006

    • Author(s)
      Masaki Sano, Shoichi Toyabe
    • Organizer
      21st COE 5th International Conference "Perspectives in Nonlinear Physics"
    • Place of Presentation
      Tokyo
    • Year and Date
      20061120-22
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Measurement of Fluctuations in Nonequilibrium Small Systems2006

    • Author(s)
      Masaki Sano, Shoichi Toyabe
    • Organizer
      21st COE 5th International Conference "Perspectives in Nonlinear Physics"
    • Place of Presentation
      Tokyo, Japan
    • Year and Date
      20061120-22
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Pattern and Localized Spatiotemporal Chaos in Vibrated Non-Newtonian Fluids2006

    • Author(s)
      Masaki Sano
    • Organizer
      International Workshop on Synchronization: Phenomena and Analysis 2006
    • Place of Presentation
      Tokyo
    • Year and Date
      20061003-06
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Pattern and Localized Spatiotemporal Chaos in Vibrated Non-Newtonian Fluids2006

    • Author(s)
      Masaki Sano
    • Organizer
      International Workshop on Synchronization : Phenomena and Analysis 2006
    • Place of Presentation
      Tokyo, Japan
    • Year and Date
      20061003-06
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Ultrasonic measurement of mean wind and fluctuations in thermal turbulence of mercury2006

    • Author(s)
      Masaki Sano
    • Organizer
      Conference \& Euromech Colloquium # 480 on High Rayleigh Number Convection
    • Place of Presentation
      Trieste, Italy.
    • Year and Date
      20060904-08
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Ultrasonic measurement of mean wind and fluctuations in thermal turbulence of mercury2006

    • Author(s)
      Masaki Sano
    • Organizer
      Conference \ & Euromech Colloquium # 480 on High Rayleigh Number Convection
    • Place of Presentation
      Trieste, Italy
    • Year and Date
      20060904-08
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Experimental test of a new equality in nonequilibrium steady state using laser tweezers2006

    • Author(s)
      Masaki Sano, Shoichi Toyabe
    • Organizer
      21st century COE and SEIKEN International Workshop on Recent Advances in Soft Matter Physics
    • Place of Presentation
      Tokyo
    • Year and Date
      20060821-23
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Experimental test of a new equality in nonequilibrium steady state using laser tweezers2006

    • Author(s)
      Masaki Sano, Shoichi Toyabe
    • Organizer
      21st century COE and SEIKEN International Workshop on Recent Advances in Soft Matter Physics
    • Place of Presentation
      Tokyo, Japan
    • Year and Date
      20060821-23
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Nonlinear Rheology and Elastic Convection of Complex Fluids2006

    • Author(s)
      Masaki Sano
    • Organizer
      9th Tamura Symposium "Frontiers in Dynamics-Physical and Biological Systems"
    • Place of Presentation
      Tokyo
    • Year and Date
      20060522-24
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Nonlinear Rheology and Elastic Convection of Complex Fluids2006

    • Author(s)
      Masaki Sano
    • Organizer
      9th Tamura Symposium "Frontiers in Dynamics -Physical and Biological Systems"
    • Place of Presentation
      Tokyo, Japan
    • Year and Date
      20060522-24
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] High Rayleigh Number Thermal Convection; An Overview and a New Approachby Ultrasonic Measurements2004

    • Author(s)
      M. Sano
    • Organizer
      International Symposium on Ultrasonic Doppler Methodfor Fluid Mechanics and Fluid Engineering
    • Place of Presentation
      Sapporo
    • Year and Date
      20040906-08
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] High Rayleigh Number Thermal Convection; An Overview and a New Approach by Ultrasonic Measurements2004

    • Author(s)
      M. Sano
    • Organizer
      International Symposium on Ultrasonic Doppler Method for Fluid Mechanics and Fluid Engineering
    • Place of Presentation
      Sapporo
    • Year and Date
      20040906-08
    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2010-02-04  

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