Search Results 1-20 of 1771

  • Anelastic torsional oscillations in Jupiter's metallic hydrogen region

    Hori K. , Teed R. J. , Jones C. A.

    … These axisymmetric zonal flow fluctuations have previously been examined for incompressible fluids in the context of Earth's liquid iron core. …

    Earth and Planetary Science Letters (519), 50-60, 2019-08-01

    IR 

  • Axisymmetric Flow due to a Stokeslet Near a Finite-Sized Elastic Membrane

    Daddi-Moussa-Ider Abdallah , Kaoui Badr , Lowen Hartmut

    Journal of the Physical Society of Japan 88(5), 054401-1-15, 2019-05

    DOI 

  • REDUCTION OF SECONDARY FLOW IN TURBINE CASCADE BY NON-AXISYMMETRIC ENDWALL CONTOURING : INFLUENCE OF AXIAL-WISE DISTRIBUTION RANGE OF CONVEX AND CONCAVE CONTOURING  [in Japanese]

    板東 翼

    … In the turbine cascade, the secondary flow such as the passage vortex is main cause of generation of aerodynamic losses. … The secondary flow loss due to the passage vortex can be reduced by locally reducing the pitch wise pressure gradient near the endwall. …

    法政大学大学院紀要. 理工学・工学研究科編 (60), 1-7, 2019-03-31

    IR  DOI 

  • Study of axisymmetric underexpanded sonic jets with Mach disks (Density field measurements by rainbow schlieren deflectometry)  [in Japanese]

    TAKESHITA Taishi , IMAMURA Takumi , NAKAO Shinichiro , MIYAZATO Yoshiaki

    … <p>The underexpanded sonic jet issued from an axisymmetric convergent nozzle are experimentally investigated in which the nozzle is operated at a pressure ratio of 4.0 to produce a Mach disk in the jet plume. …

    Transactions of the JSME (in Japanese) 85(876), 19-00096-19-00096, 2019

    J-STAGE 

  • Effect of Boattail Angle on Pressure Distribution and Drag of Axisymmetric Afterbodies under Low-Speed Conditions

    TRAN The Hung , AMBO Takumi , CHEN Lin , NONOMURA Taku , ASAI Keisuke

    … <p>This study is focused on the effect of boattail angle on the pressure distribution and drag force of axisymmetric afterbodies under low-speed conditions. … Two types of flows, a fully-attached flow (<i>β</i> … = 10°) and a flow with a separation bubble (<i>β</i> …

    TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES 62(4), 219-226, 2019

    J-STAGE 

  • Control of jet using burst modulation by coaxial type DBD plasma actuator (Changes in jet diffusion process by applied voltage and burst frequency)  [in Japanese]

    AKIMOTO Masato , KIMURA Motoaki

    … <p>This study demonstrated jet control through the generation of an intermittently induced flow via burst-modulation from a coaxial type, axisymmetric nozzle shape DBD plasma actuator (DBD-PA). …

    Transactions of the JSME (in Japanese) 85(874), 19-00010-19-00010, 2019

    J-STAGE 

  • Computational analysis on oxygen MILD combustion using synthesis gas

    LEE Ho Yeon , CHA Chun Loon , HWANG Sang Soon

    … <p>In this paper, a possibility of the oxygen-syngas MILD combustion was assessed using the CFD analysis by applying the JHC (Jet-in Hot Co-flow) combustion system. … The Ansys Fluent, commercial CFD code with RANS (Reynolds Averaged Navier-Stokes), modified k-ε equations and EDC (Eddy Dissipation Concept) model using 2D-axisymmetric computational domain was used in order to analyse oxygen-syngas MILD combustion. …

    Journal of Thermal Science and Technology 14(1), JTST00008-JTST00008, 2019

    J-STAGE 

  • Advantages of a slim vertical gas channel at high SiHCl3 concentrations for atmospheric pressure silicon epitaxial growth

    Irikura Kenta , Muroi Mitsuko , Yamada Ayami , Matsuo Miya , Habuka Hitoshi , Ishida Yuuki , Ikeda Shin-Ichi , Hara Shiro

    … Based on a numerical analysis taking into account the gas flow, heat and species transport, particularly over a wide range of the trichlorosilane gas concentrations from 1% to 40% in ambient hydrogen, a heavy and cold gas was shown to quickly go downward to the hot wafer surface through the slim vertical gas channel. …

    Materials Science in Semiconductor Processing (87), 13-18, 2018-11-15

    IR 

  • Unsteady and Non-Axisymmetric Flow caused by Partial Admission Turbine Stages and the Resultant Unsteady Fluid Forces  [in Japanese]

    船﨑 健一

    ターボ機械 = Turbomachinery 46(7), 425-433, 2018-07

  • REDUCTION OF SECONDARY FLOW IN TURBINE CASCADE BY NON-AXISYMETRIC ENDWALL CONTRING-DESIGN OF CONCAVE AND CONVEX CONTOURING BASED ON STATIC PRESSURE DISTRIBUTION ON PLANAR ENDWALL  [in Japanese]

    任 憲鵬

    … In a turbine cascade, the secondary flow related to the passage vortex is the main reason for the aerodynamic loss generation and gives rise to the deterioration of the efficiency of gas turbine. … The secondary flow loss caused by the passage vortex can be weakened by locally reducing the pitch-wise pressure gradient only in the vicinity of the endwall. … In this study, the non-axisymmetric endwall contouring was investigated by using a linear turbine cascade test rig. …

    法政大学大学院紀要. 理工学・工学研究科編 = 法政大学大学院紀要. 理工学・工学研究科編 (59), 2018-03-31

    IR 

  • Vortex Dynamics in Stirred Tank Mixer by Rotating Jets

    Azam Md. Tauhedul , Kang Donghyuk , Hirahara Hiroyuki , MURATA Kazuhisa , SHIMOJI Yasufumi

    … Co-rotating vortices generated by neighboring jets merge into a single axisymmetric vortex. … The counter-rotating vortex pair generates a vortex shedding in the radial flow direction which gives oscillatory fluctuation on the flow field.</p> …

    The Proceedings of the Fluids engineering conference 2018(0), OS8-12, 2018

    J-STAGE 

  • Generation Frequency and Utilization of Vortex Train in Axisymmetric Jet with Entrance Pipe  [in Japanese]

    Akimoto Masato , 木村 元昭

    … was changed by changing the length of the entrance pipe, regardless of the same nozzle, the same flow velocity and measurement environment. …

    The Proceedings of the Fluids engineering conference 2018(0), OS5-16, 2018

    J-STAGE 

  • Non-equilibrium molecular dynamics simulation of the supersonic nozzle flow and the condensation  [in Japanese]

    MATSUMURA Yuya

    … <p>The supersonic flow through a Laval nozzle is studied using non-equilibrium molecular dynamics. … A barostat and thermostat heatbath, a nozzle wall with the signed distance function, and axisymmetric boundary condition for reducing the computation are implemented to simulate the nozzle flow. … The flow yields temperature, pressure and Mach number distributions, which agree well with predictions of the theory of isentropic expansion. …

    The Proceedings of The Computational Mechanics Conference 2018.31(0), 074, 2018

    J-STAGE 

  • Development of an Accurate Particle Method Using Moving Surface Mesh for Surface Tension-Dominant Flows  [in Japanese]

    MATSUNAGA Takuya , KOSHIZUKA Seiichi , HOSAKA Tomoyuki , ISHII Eiji

    … <p>In this paper, we proposed a novel particle method for free-surface flow in the presence of surface tension forces. … Internal liquid flow is simulated using a particle method, in which spatial derivatives are discretized using the arbitrary high order accurate LSMPS scheme. … As numerical examples, simulations of two-dimensional droplet oscillations, axisymmetric liquid bridge deformation, and hanging droplet are demonstrated.</p> …

    The Proceedings of The Computational Mechanics Conference 2018.31(0), 032, 2018

    J-STAGE 

  • Melting of PCM in Capsule by Forced Convection for Packed Bed Latent Heat Storage System.  [in Japanese]

    TAZAWA Shunichi , BELLAN Selvan , MATSUBARA Koji , KODAMA Tatsuya , GOKON Nobuyuki , CHOK Hyun Seok

    … An axisymmetric model of heat transfer and fluid flow during melting process on forced convection based on the experiment is analyzed.</p> …

    The Proceedings of the Thermal Engineering Conference 2018(0), 0061, 2018

    J-STAGE 

  • Analysis of Flow Structure of Marangoni Convection around a Micro Bubble Attached to the Channel Wall  [in Japanese]

    Atsumi Takaya , Tatsumi Kazuya , Namura Kyoko , Kuriyama Reiko , Suzuki Motofumi , Nakabe Kazuyoshi

    … <p>In this study, the flow structure of Marangoni convection generated around a micro-bubble attached to the channel wall by locally heating the wall near the bubble is investigated using numerical method. … An axisymmetric vortex flow was generated when the heating area was located at the center of the bubble. … Further, the effects of the distance between the heating area and the bubble, and the size of the area on the flow structure were evaluated. …

    The Proceedings of the Thermal Engineering Conference 2018(0), 0106, 2018

    J-STAGE 

  • Numerical Analysis on Physical Property Change around Flame in Fire Whirl Generation  [in Japanese]

    Shimizu Shoma , Hayashi Miyuki , Nishimura Yusaku , Kushida Genichiro

    … <p>It is important for the generation of fire whirl to know how a swirling flow around a flame affects the flame behavior, and therefore it is very useful to investigate the flame behavior and the transient local distributions of physical property such as velocity, pressure, temperature, etc. … In the present study, numerical calculations by a finite volume method are performed for an axisymmetric methane jet diffusion flame behavior which a swirling flow affects. …

    The Proceedings of the Thermal Engineering Conference 2018(0), 0028, 2018

    J-STAGE 

  • Numerical analysis of side-jet phenomena in an axisymmetric jet flow  [in Japanese]

    ASANUMA Shogo , ITOH Yuichi

    … The side jet is ejection phenomenon of jet flow in a direction different from the main flow direction of jet. … Generation condition of the side jet is related to momentum thickness, density ratio and Reynolds number of the jet flow. …

    The Proceedings of Mechanical Engineering Congress, Japan 2018(0), S0510305, 2018

    J-STAGE 

  • Linear stability of the boundary layer flow along an archery arrow  [in Japanese]

    HASEGAWA Toshinari , SERINO Atsushi , MIYAZAKI Takeshi , TAKAHASHI Naoya , IWATSU Reima

    … <p>The linear instability of the boundary layer flow formed along an archery arrow is investigated based on the parallel flow approximation. … Two types of points, i.e. streamlined and bulge, are attached to the arrow head and the axisymmetric basic flows are numerically computed by a stream function-vorticity method. … We find that the axisymmetric mode with <i>m</i> …

    The Proceedings of Mechanical Engineering Congress, Japan 2018(0), J2340204, 2018

    J-STAGE 

  • Theory of Low Reynolds Number Flow in Microscopic and Tapered Circular-tube  [in Japanese]

    YAGUCHI Hisao , FUJIKAWA Toshihide , EGASHIRA Ryu , FUJIKAWA Shigeo

    … <p>This paper aims at making in a theoretical way an analysis on incompressible flows with low Reynolds number in a microscopic and tapered circular-tube, an axisymmetric tube with its diameter contracting linearly along the axis. … Our model can successfully predict the development of the flow in the tube.</p> …

    The Proceedings of Mechanical Engineering Congress, Japan 2018(0), J0530102, 2018

    J-STAGE 

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