Search Results 1-20 of 103

  • Modeling of Heat Pulse Propagation During TESPEL Injection into the LHD Plasma

    SERGEEV Vladimir Yu. , DNESTROVSKIY Alexei Yu. , FROLOV Vasiliy E. , PUSTOVITOV Vladimir D. , TAMURA Naoki

    … <p>Anomalous transport is a paradigm for analysis of both Power Balance (PB) and Heat Pulse Propagation (HPP) in magnetically confined plasmas including so called non-local transport (NLT) phenomena (core heating as a reaction on the edge cooling). … First results of numerical modeling of the electron heat transport by the ASTRA code confirm the viability of this approach.</p> …

    Plasma and Fusion Research 14(0), 3402121-3402121, 2019

    J-STAGE 

  • Method for Estimating Harmonic Frequency Dependence of Diffusion Coefficient and Convective Velocity in Heat Pulse Propagation Experiment

    Kobayashi Tatsuya , Itoh Kimitaka , Ida Katsumi , Inagaki Sigeru , Itoh Sanae-I.

    Journal of the Physical Society of Japan 86(7), 074501-1-7, 2017-07

    DOI 

  • Propagation of heat pulse through superfluid <sup>4</sup>He in aerogel II  [in Japanese]

    Okamoto R. , Kato S. , Nakajima A. , Abe S. , Matsumoto K.

    <p>エアロジェル中超流動^4^Heには、バルク中とは異なるFast mode, Slow modeという音波が伝播する。Slow modeについて研究するためにヒートパルスを用いた実験を行った。超流動相において、Slow modeと第2音波の両方の信号が観測された。前回から、ヒーター、ゲルの長さなどの改良を行ったので、実験の詳細について報告する</p>

    Meeting Abstracts of the Physical Society of Japan 72.1(0), 1720-1720, 2017

    J-STAGE 

  • On the Study of Higher Harmonics of Heat Pulse Propagation in the Modulated-Heating Experiments

    Itoh Kimitaka , Itoh Sanae-I. , Inagaki Shigeru , Kasuya Naohiro , Fujisawa Akihide

    Journal of the Physical Society of Japan 85(1), 014501-014501, 2016-01-15

    DOI 

  • On the Study of Higher Harmonics of Heat Pulse Propagation in the Modulated-Heating Experiments

    Itoh Kimitaka , Itoh Sanae-I. , Inagaki Shigeru [他]

    Journal of the Physical Society of Japan 85(1), 014501-1-6, 2016-01

  • Test of the Telegraph Equation for Transport Dynamics in Plasma

    INAGAKI Shigeru , ITOH Kimitaka , ITOH Sanae-I. , KOSUGA Yusuke , LESUR Maxime , KASUYA Naohiro

    … This model was applied to nondiffusive radial heat pulse propagation under the periodic modulation of the heating power. … However, the phase relation between the temperature gradient and heat flux was opposite to that in experimental observations.</p> …

    Plasma and Fusion Research 10(0), 1203002-1203002, 2015

    J-STAGE 

  • G0600301 Study on Flame Propagation Restraint by the Electric Field  [in Japanese]

    YANAGISAWA Shota , IIJIMA Akira , SHOJI Hideo , YOSHIDA Koji

    … The purpose of this study is to elucidate flame propagation behavior of homogeneous propane-air mixture under application of non-uniform electric fields. … The non-uniform electric field was generated between the needle-shaped electrode and plate electrode, and a positive polarity single pulse high voltage was applied to the needle-shaped electrode (pulse width was 2 [ms]) and plate electrode was grounded. …

    The Proceedings of Mechanical Engineering Congress, Japan 2015(0), _G0600301--_G0600301-, 2015

    J-STAGE 

  • Higher Harmonics in the Perturbative Transport Study in TJ-II ECH Plasma

    INAGAKI Shigeru , KASUYA Naohiro , TJ-II team , ITOH Sanae-I. , ITOH Kimitaka , IDA Katsumi , LÓPEZ-BRUNA Daniel , OCHAND Maria A. , ESTRADA Teresa , VAN MILLIGEN Boudewijn Ph. , HIDALGO Carlos

    We analyzed the higher harmonics of temperature perturbation in the modulated electron cyclotron heating experiment on TJ-II plasma. The higher harmonics (e.g., 5th harmonic) exhibited significantly w …

    Plasma and Fusion Research 9(0), 1202052-1202052, 2014

    J-STAGE 

  • 28pAX-3 Consideration about the heat pulse propagation experiments for detecting magnetic field structure  [in Japanese]

    Ohdachi Satoshi , Ming Ting Feng , Suzuki Yasuhiro , Ida Katsumi

    Meeting Abstracts of the Physical Society of Japan 69.1.2(0), 262, 2014

    J-STAGE 

  • Higher Harmonics in a Perturbative Transport Experiment

    INAGAKI Shigeru , SHIMOZUMA Takashi , TAMURA Naoki , TSUCHIYA Hayato , NAGAYAMA Yoshio , KAWAHATA Kazuo , YAMADA Hiroshi , KOMORI Akio , LHD Experiment Group , ITOH Sanae-I. , ITOH Kimitaka , KASUYA Naohiro , KOBAYASHI Tatsuya , FUJISAWA Akihide , TOKUZAWA Tokihiko , IDA Katsumi , KUBO Shin

    … Changes in the time derivative of temperature at the onset and turning-off of heating power remained much sharper after radial propagation than those predicted by the diffusion model. …

    Plasma and Fusion Research 8(0), 1202173-1202173, 2013

    J-STAGE 

  • New Method of Analysis for Dynamical Transport

    INAGAKI Shigeru , FUJISAWA Akihide , KASUYA Naohiro , TSUCHIYA Hayato , NAGAYAMA Yoshio , KAWAHATA Kazuo , YAMADA Hiroshi , KOMORI Akio , LHD Experiment Group , TOKUZAWA Tokihiko , KOBAYASHI Tatsuya , ITOH Sanae-I. , ITOH Kimitaka , IDA Katsumi , KUBO Shin , SHIMOZUMA Takashi , TAMURA Naoki

    … In this paper, the new method is compared to the conventional heat-pulse propagation method. …

    Plasma and Fusion Research 8(0), 1202172-1202172, 2013

    J-STAGE 

  • A New Simple Equation Governing Distortion of Compression Wave Propagating Through Shinkansen Tunnel with Slab Tracks

    MIYACHI Tokuzo , OZAWA Satoru , FUKUDA Takashi , IIDA Masanobu , ARAI Takakage

    … When the compression wave reaches the tunnel exit, a pressure pulse causing environmental problems (the micro-pressure wave) is radiated from the exit portal. … In a long Shinkansen tunnel with concrete slab tracks, the compression wavefront steepens due to the nonlinear effect during its propagation because all surfaces of the tunnel wall are smooth. …

    Journal of Fluid Science and Technology 8(3), 462-475, 2013

    J-STAGE 

  • Finite-Difference Time Domain Analysis of Ultrashort Pulse Laser Light Propagation under Nonlinear Coupling

    AKAMINE Yoshihiko , DOAN Hong Duc , FUSHINOBU Kazuyoshi

    … Aim of this study is to propose a numerical model and to calculate ultrashort pulse laser light propagation by using Finite-Difference Time Domain (FDTD). … pulse here is defined so that the Slowly Varying Envelope Approximation (SVEA) breaks in Beam Propagation Method (BPM) and corresponds to the pulse width of typically several tens of femtoseconds or shorter. …

    Journal of Thermal Science and Technology 8(1), 225-239, 2013

    J-STAGE 

  • Thermal Wave Propagation Phenomenon in a Thin Film Heated at Asymmetrical Wall Temperature

    Torii Shuichi , トリイ シュウイチ , 鳥居 修一

    … Numerical study is performed to investigate thermal wave propagation in a very thin film subjected to an asymmetrical temperature change on both sides. … The non-Fourier, hyperbolic heat conduction equation is solved using a numerical technique based on MacCormak's predictor-corrector scheme. …

    Journal of Materials Science and Engineering:B 2(1), 24-29, 2012-01

    IR 

  • Spectral Molecular Dynamic Analysis of Coherent Phonon Propagation in Nanoribbon after Pulse Heating

    ZOLOTOUKHINA Tatiana , OKUMURA Yuta

    … Thermal transport of coherent phonons at a few picosecond pulse heating is studied by molecular dynamics method in the presence of diffusion. … In the present study, coherent phonon spectral characteristics are compared for different shapes of the heating pulse, half-pulse square, Gaussian, and triangle at the time of propagation, in the Lennard-Jones (LJ) nanoribbon model for emitted train (3 to 5) of coherent phonons. …

    Journal of Thermal Science and Technology 7(1), 301-312, 2012

    J-STAGE 

  • A New Simple Equation Governing Distortion of Compression Wave Propagating Through Shinkansen Tunnel with Slab Tracks

    MIYACHI Tokuzo , OZAWA Satoru , FUKUDA Takashi , IIDA Masanobu , ARAI Takakage

    … When the compression wave reaches the tunnel exit, a pressure pulse causing environmental problems (the <i>micro-pressure wave</i>) is radiated from the exit portal. … In a long Shinkansen tunnel with concrete slab tracks the compression wavefront steepens due to the nonlinear effect during its propagation because the whole surfaces of the tunnel being smooth. …

    TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B 78(785), 60-73, 2012

    J-STAGE 

  • OS4-3 Combustion Improvement by Using Combination of High Performance Ignition System and Microwave Plasma System(OS4 Plasma-assisted combustion,Organized Session Papers)

    Nishiyama Atsushi , Wachi Yoshihiro , Ikeda Yuji , Serizawa Takeshi , Oi Hiroaki

    … The high-frequency voltage was applied just after the SI timing of the standard spark system, and the pulse width was changeable. … During the active ignition and microwave operating cycles, the heat release was stable and the indicated mean effective pressure (IMEP) fluctuation was relatively low. …

    The Proceedings of the International symposium on diagnostics and modeling of combustion in internal combustion engines 2012.8(0), 170-175, 2012

    J-STAGE 

  • Coherent phonon generation and its spectral analisys at pulse heating of the LJ nanoribbon  [in Japanese]

    Zolotoukhina Tatiana

    … Generation and thermal transport of coherent phonons at the instantaneous pulse heating is studied by molecular dynamics method in the presence of diffusion. … Coherent phonon formation and propagation characteristics are compared for different shapes of the heating pulse, square, Gaussian, and triangle, in the Lennard-Jones (LJ) nanoribbon model. …

    Proceedings of National Heat Transfer Symposium 2011(0), 129-129, 2011

    J-STAGE 

  • Finite-difference Time-domain Analysis of Short Pulse Laser Propagation in Material with Nonlinear Effects  [in Japanese]

    CHIJIIWA Munehio , FUSHINOBU Kazuyoshi , OKAZAKI Ken

    過渡レンズ法は,その高感度から光熱変換分光法の一つとして,分析,物理化学の分野で広く用いられている.従来の研究においては,検出光の中心近傍の光強度分布を扱っていた.しかし,この手法では,空間強度分布が欠落するため,検出光や物質のパラメータ依存性の評価が困難であった.我々は,ビームプロファイルを用いた計測により,上記特性と,透過光のプロファイルを明らかにした.本研究では,検出光に短パルスレーザを用い …

    Proceedings of National Heat Transfer Symposium 2010(0), 203-203, 2010

    J-STAGE 

  • Analysis of Ultrasound Propagation in A Steel Pipe Using Ultrasonic Pulse Doppler Method  [in Japanese]

    TEZUKA Kenichi , WADA Sanehiro , MORI Michitsugu , KIKURA Hiroshige , ARITOMI Masanori

    … The ultrasonic pulse Doppler system is expected to be a suitable method featuring the capability o measuring the flow profile directly in a pipe. … This paper presents analytical results of ultrasound propagation using FEM simulation code and experimental results of pipe flow rate at high temperature thermal conditions. …

    Thermal Science and Engineering 16(3), 95-104, 2008-07-01

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