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2005 Fiscal Year Final Research Report Summary

Micro-scale Analysis of High Knudsen Number Flows

Research Project

Project/Area Number 15206020
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Fluid engineering
Research InstitutionNagoya University

Principal Investigator

NIIMI Tomohide  Nagoya Univ., Faculty of Engg., Prof., 大学院・工学研究科, 教授 (70164522)

Co-Investigator(Kenkyū-buntansha) YAMASHITA Shintaro  Gifu Univ., Faculty of Engg., Prof., 工学部, 教授 (20023236)
HIROTA Masafumi  Nagoya Univ., Faculty of Engg., Associate Prof., 大学院・工学研究科, 助教授 (30208889)
MORI Hideo  Nagoya Univ., Faculty of Engg., Assistant Prof., 大学院・工学研究科, 講師 (70362275)
Project Period (FY) 2003 – 2005
KeywordsMicro-Scale / High Knudsen Number Flows / REMPI / Gas-Surface Interaction / Free Molecular Flow / Langmuir-Blodgett Film / Non-Equilibrium / Temperature Measurement
Research Abstract

To describe the degree of rarefaction, Knudsen number (Kn) is defined by the ratio of the mean free path (λ) divided by the characteristic dimension (L) of the flow. Provided that the Kn exceeds 0.01, we cannot approximate the flow as a continuum one, but have to perceive the flow as an atomic or molecular one. We call these flows with large Kn "High Knudsen number flows," which correspond not only to low density gas flows with large λ, but also to gas flows in micro- or nano-systems with small L. In the case of large λ, there appear the strong non-equilibrium phenomena because of few intermolecular collisions. For extremely small L, on the other hand, the flow field is strongly influenced by interaction of molecules with a solid boundary rather than intermolecular collisions. Experimental analyses of thermo-fluid phenomena related to the high Knudsen number flows need the optical measurement techniques based on atoms or molecules, such as their emission and absorption of photons. Howe … More ver, the experimental techniques are behind in development compared with the molecular simulation techniques.
In this study, I introduce a resonantly enhanced multiphoton ionization (REMPI) method and a pressure sensitive molecular film (PSMF). We established the 2R+2 N_2-REMPI technique, in which nitrogen molecules are ionized by two steps, i.e., the first step from the ground state to the resonance state (2 photons) and the second step from the resonance state to the ionization state (2 photons). The nitrogen ions are detected as a signal and its spectra depending on the wavelength of an irradiated laser beam are analyzed to measure the rotational temperature through the Boltzmann plot. The 2R+2 N_2-REMPI technique is applied to measure the rotational population in supersonic free molecular nitrogen flows and obtain the non-Boltzmann rotational distribution for P_0・D=15 Torr mm (where P_0 is the source pressure and D is the nozzle diameter). The pressure-sensitive paint (PSP) has potential as a diagnostic tool for pressure measurement in the high Knudsen number regime because the principle of the pressure sensitive paint (PSP) technique is based on oxygen quenching of luminescence. Aiming to apply the PSP to micro devices, we have adopted Langmuir-Blodgett (LB) technique to fabricate pressure sensitive molecular films (PSMFs) using PdOEP and PdMP, and have tested these PSMFs to evaluate the feasibility of the pressure measurement around micro devices. Less

  • Research Products

    (21 results)

All 2006 2005 Other

All Journal Article (20 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] クラスター型リニアエアロスパイクノズル噴流のNO-LIF及びPSPを用いた実験2006

    • Author(s)
      谷口真潮, 森英男, 西平竜太郎, 新美智秀
    • Journal Title

      可視化情報 Vol.26,No.2

      Pages: 13-18

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Experimental Analyses of Jet Structures around Clustered Linear Aerpspike Nozzle by NO-LIF and PSP2006

    • Author(s)
      M.Taniguchi, H.Mori, R.Nishihira, T.Niimi
    • Journal Title

      Journal of Visualization Society of Japan Vo.22, No2

      Pages: 13-18

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Pressure Sensitive Paint Suitable to High Knudsen Number Regime2006

    • Author(s)
      H.Mori, T.Niimi, M.Hirako, H.Uenishi
    • Journal Title

      Measurement Science and Technology 17

      Pages: 1242-1246

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Molecular Number Flux Detection using Oxygen Sensitive Luminophore2005

    • Author(s)
      H.Mori, T.Niimi, M.Hirako, H.Uenishi
    • Journal Title

      Physics of Fluids 17

      Pages: 100610

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Experimental Detection of Rotational Non-Boltzmann Distribution in Supersonic Free Molecular Nitrogen Flows2005

    • Author(s)
      H.Mori, T.Niimi, I.Akiyama, T.Tsuzuki
    • Journal Title

      Physics of Fluids 17

      Pages: 117103

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] NO-LIF及びPSPを用いた側壁付きリニアエアロスパイクノズルの評価2005

    • Author(s)
      谷口真潮, 森英男, 西平竜太郎, 福島敦至, 新美智秀
    • Journal Title

      可視化情報 Vol.25,Suppl.1

      Pages: 335-338

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Experimental Analyses of Linear-type Aerospike Nozzles with Sidewalls2005

    • Author(s)
      H.Mori, T.Niimi, M.Taniguchi, R.Nishihira, A.Fukushima
    • Journal Title

      21^<st> International Congress on Instrumentation in Aerospace Simulation Facilities (ICIASF'05), IEEE

      Pages: 138-142

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Visualization of flow fields around clustered linear-type aerospike nozzles with sidewalls2005

    • Author(s)
      H.Mori, M.Taniguchi, R.Nishihira, T.Niimi
    • Journal Title

      5^<th> Pacific Symposium on Flow Visualization and Image Processing (PSFVIP-5)

      Pages: aer 3-9

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Application of Pressure Sensitive Luminophores for Micro- and Nano-systems2005

    • Author(s)
      Y.Matsuda, H.Mori, T.Niimi, H.Uenishi, M.Hirako
    • Journal Title

      IEEE International Symposium on Micromechanics and Human Science (MHS2005)

      Pages: 267-272

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Pressure Measurement Technique using Pressure Sensitive Molecular Film for Micro Devices2005

    • Author(s)
      Hideo Mori, Tomohide Niimi, Yu Matsuda, Hiroyuki Uenishi
    • Journal Title

      The 3rd Taiwan-Japan Workshop on Mechanical and Aerospace Engineering (CD-R)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Optical Diagnostics of High Knudsen Number Flows2005

    • Author(s)
      T.Niimi
    • Journal Title

      The 6th World Conf. on Experimental Heat Transfer, Fluid Mechanics & Thermodynamics (CD-R)

      Pages: KL11

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Optical Diagnostic Methods for High Knudsen Number Flows2005

    • Author(s)
      T.Niimi
    • Journal Title

      IFS-JAXA Joint Symposium on Advanced Fluid Information

      Pages: 20-21

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Molecular Number Flux Detection using Oxygen Sensitive Luminophore2005

    • Author(s)
      H.Mori, T.Niimi, M.Hirako, H.Uenishi
    • Journal Title

      Physics of Fluids 17(10)

      Pages: 100610-1-100610-6

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Experimental Detection of Rotational Non-Boltzmann Distribution in Supersonic Free Molecular Nitrogen Flows2005

    • Author(s)
      H.Mori, T.Niimi, I.Akiyama, T.Tsuzuki
    • Journal Title

      Physics of Fluids 17(11)

      Pages: 117103-1-117103-7

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Application of Pressure Sensitive Luminophores for Micro- and Nano-systems2005

    • Author(s)
      Y.Matsuda, H.Uenishi, H.Mori, M.Hirako, T.Niimi
    • Journal Title

      Int. Symp. on Micro-Nano Mechatronics and Human Science

      Pages: 267-272

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Pressure Measurement Technique using Pressure Sensitive Molecular Film for Micro Devices2005

    • Author(s)
      Hideo Mori, Tomohide Niimi, Yu Matsuda, Hiroyuki Uenishi
    • Journal Title

      The 3rd Taiwan-Japan Workshop on Mechanical and Aerospace Engineering, CD-R

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Optical Diagnostics of High Knudsen Number Flows2005

    • Author(s)
      T.Niimi
    • Journal Title

      The 6th World Conf. on Experimental Heat Transfer, Fluid Mechanics & Thermodynamics (ExHFT-6), CD-R Keynote Lecture (KL 11)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Optical Diagnostic Methods for High Knudsen Number Flows2005

    • Author(s)
      T.Niimi
    • Journal Title

      Proc. of the fifth Int. Symp. on Advanced Fluid Information (AFI-2005), IFS-JAXA Joint Symposium

      Pages: 20-21

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Application of Pressure-Sensitive Paints to Low Pressure Range2005

    • Author(s)
      T.Niimi, et al.
    • Journal Title

      J. of Thermophysics and Heat Transfer, AIAA Vol.19, No.1

      Pages: 9-16

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Investigation of Linear-Type Aerospike Nozzle with Side walls using No-LIF and PSP

    • Author(s)
      M.Taniguchi, H.Mori, R.Nishihira, A.Fukushima, T.Niimi
    • Journal Title

      Proceedings of the 33^<rd> Symposium on the Visualization Vol.25, Suppl.No.1

      Pages: 335-338

    • Description
      「研究成果報告書概要(欧文)」より
  • [Patent(Industrial Property Rights)] 酸素感応膜及びその製造方法2005

    • Inventor(s)
      森英男, 新美智秀, 平光円, 上西裕之
    • Industrial Property Rights Holder
      国立大学法人名古屋大学
    • Industrial Property Number
      特願2005-278731
    • Filing Date
      2005-09-26
    • Description
      「研究成果報告書概要(和文)」より

URL: 

Published: 2007-12-13  

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