Journal of Japan Society of Fluid Mechanics
Online ISSN : 2185-4912
Print ISSN : 0286-3154
ISSN-L : 0286-3154
Search
Advanced search
OR
Browse
Search
Volume 23, Issue 4
Displaying 1-9 of 9 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
  • [title in Japanese]
    [in Japanese], [in Japanese]
    2004 Volume 23 Issue 4 Pages 229-230
    Published: August 25, 2004
    Released on J-STAGE: March 07, 2011
    DOIhttps://doi.org/10.11426/nagare1982.23.229
    JOURNAL FREE ACCESS
    Download PDF (1163K)
  • CFD in Aerospace
    Current Status and Future Prospect
    Kozo FUJII
    2004 Volume 23 Issue 4 Pages 233-241
    Published: August 25, 2004
    Released on J-STAGE: March 07, 2011
    DOIhttps://doi.org/10.11426/nagare1982.23.233
    JOURNAL FREE ACCESS
    Download PDF (9556K)
  • Relation Between Inducer Inlet Geometry and Flow Structures
    Toshiya KIMURA, Yoshiki YOSHIDA
    2004 Volume 23 Issue 4 Pages 243-251
    Published: August 25, 2004
    Released on J-STAGE: August 16, 2011
    DOIhttps://doi.org/10.11426/nagare1982.23.243
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The relation between inlet casing geometries and backflow and vortex structures emerged upstream of an inducer was investigated by 3D CFD simulations. Since flow structures such as backflow and vortices are thought to be related to unsteady cavitation phenomena, the effects of inlet casing geometries on such flow structures were examined by CFD simulations. The simulation results showed that flow structures, especially upstream of the inducer, were strongly affected by slight modification of the inlet geometry of the casing and the systematic relations were found between flow structures and the inlet geometries.
    View full abstract
    Download PDF (13767K)
  • The lattice Boltzmann simulation of the droplet creation in the horizontal stratified two-phase flow
    Ken-ichi EBIHARA, Tadashi WATANABE
    2004 Volume 23 Issue 4 Pages 253-261
    Published: August 25, 2004
    Released on J-STAGE: March 07, 2011
    DOIhttps://doi.org/10.11426/nagare1982.23.253
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The lattice Boltzmann method for one-component two-phase fluid is applied to the simulation of the droplet creation in the horizontal stratified two-phase flow. It is observed in several flow states that the droplet tears from the interface wave. The dimensionless numbers that characterize the flow state are also measured during the simulations. After checking the influence of the lattice length and width to the simulation result, the relation between the droplet creation and the measured dimensionless numbers is compared with the inception criteria of the droplet creation that was proposed on the basis of experimental data by Ishii and Grolmes.
    View full abstract
    Download PDF (2588K)
  • Highly-Accurate Schemes for Nonlinear Conservation Laws with Source Terms and Their Verification
    Yoko TAKAKURA
    2004 Volume 23 Issue 4 Pages 263-272
    Published: August 25, 2004
    Released on J-STAGE: March 07, 2011
    DOIhttps://doi.org/10.11426/nagare1982.23.263
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The ADER (Arbitrary-Accuracy DErivative Riemann problem) approach for constructing non-oscillatory explicit one-step schemes with very high order of accuracy in space and time has been extended to nonlinear scalar conservation laws with source terms in the general form. The extension of the ADER from a linear equation to a nonlinear equation has choice of two methods : one is based on the state-series expansion and another is based on the direct expansion. For each method, t-expansion is shown for the flux function and xt-expansion and t-expansion are shown for the source function. Numerical verification for all the ADER schemes up to the 5-th order of accuracy showed that the designed convergence rate was achieved, and that they worked well for discontinuity problems.
    View full abstract
    Download PDF (2420K)
  • Development of Compressible Fluid Analysis Technique Based on A Solution of Advection-Diffusion Equations
    Isao KIMURA, Katsuhiro SAKAI
    2004 Volume 23 Issue 4 Pages 273-283
    Published: August 25, 2004
    Released on J-STAGE: August 16, 2011
    DOIhttps://doi.org/10.11426/nagare1982.23.273
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    We propose a new numerical method for solving compressible fluid flows by applying previously developed two schemes ANO & COLE based on an analytical solution of linear and nonlinear advection-diffusion equations. Each conservation equation in governing equations is divided into two parts; advection-diffusion part and other part. Solutions of those two parts are combined by making use of a time splitting method. Numerical experiments for a 1-D shock tube problem inclusive of shock wave interaction problems are performed by using the present method, resulting in a nonoscillatory shock wave of pressure, a contact surface and an expansion wave.
    View full abstract
    Download PDF (6320K)
  • Computational Aeroacoustic Analysis around an Airfoil Using Linearized Euler Equations
    Toshihiro KAMATSUCHI
    2004 Volume 23 Issue 4 Pages 285-294
    Published: August 25, 2004
    Released on J-STAGE: August 16, 2011
    DOIhttps://doi.org/10.11426/nagare1982.23.285
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    In this paper, a computational method is discussed to predict aerodynamic sound fields. The sound radiation is analyzed using LEE (Linearized Euler Equations) with source terms of sound generation. The sound generation is computed with the SNGR (Stochastic Noise Generation and Radiation) model for local turbulence scales obtained from RANS (Reynolds Averaged Navier-Stokes) flow simulation. In the analyses, an unstructured grid method is employed for effective handling of complex geometric models. This method is applied to aeroacoutic simulation around an airfoil. The results show that sounds are generated by turbulent boundary layers interacting with the trailing edge.
    View full abstract
    Download PDF (7843K)
  • Numerical Simulation on Flow in Porous Media with Combustion
    Kazuhiro YAMAMOTO
    2004 Volume 23 Issue 4 Pages 295-302
    Published: August 25, 2004
    Released on J-STAGE: March 07, 2011
    DOIhttps://doi.org/10.11426/nagare1982.23.295
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Flow in porous media with combustion is simulated using the Lattice Boltzmann method (LBM). The d2q9 model for 2D simulation and d3q15 model for 3D simulation are applied. The porous structure is simplified to insert obstacles with square shape in the 2-D or 3-D duct flow. These obstacles are placed randomly to set the porosity. To change the flow characteristics with any roughness in this model, the different number and size of obstacle are used. Results show that combustion of soot is well simulated in the complex flow pattern.
    View full abstract
    Download PDF (5870K)
  • [title in Japanese]
    [in Japanese]
    2004 Volume 23 Issue 4 Pages 303
    Published: August 25, 2004
    Released on J-STAGE: March 07, 2011
    DOIhttps://doi.org/10.11426/nagare1982.23.303
    JOURNAL FREE ACCESS
    Download PDF (195K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top