Journal of Japan Society of Fluid Mechanics

Online ISSN : 2185-4912
Print ISSN : 0286-3154
ISSN-L : 0286-3154

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Volume 24, Issue 4

Displaying 1-10 of 10 articles from this issue

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Fluid Mechanics of Sound

[in Japanese], [in Japanese]

2005 Volume 24 Issue 4 Pages 361
Published: August 25, 2005
Released on J-STAGE: March 07, 2011

DOIhttps://doi.org/10.11426/nagare1982.24.361

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Sound Propagation in Transversely-sheared Flows

Takao UZUKI

2005 Volume 24 Issue 4 Pages 363-370
Published: August 25, 2005
Released on J-STAGE: March 07, 2011

DOIhttps://doi.org/10.11426/nagare1982.24.363

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Acoustic streaming in resonators

Takeru YANO

2005 Volume 24 Issue 4 Pages 371-380
Published: August 25, 2005
Released on J-STAGE: March 07, 2011

DOIhttps://doi.org/10.11426/nagare1982.24.371

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Thermoacoustic oscillations and their stability analysis from a viewpoint of the boundary-layer theory

Nobumasa SUGIMOTO

2005 Volume 24 Issue 4 Pages 381-393
Published: August 25, 2005
Released on J-STAGE: March 07, 2011

DOIhttps://doi.org/10.11426/nagare1982.24.381

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Sound Propagation in Narrow Tubes and Thermoacoustic Phenomena

Taichi YAZAKI

2005 Volume 24 Issue 4 Pages 395-404
Published: August 25, 2005
Released on J-STAGE: March 07, 2011

DOIhttps://doi.org/10.11426/nagare1982.24.395

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Nonlinear Acoustic Behavior of a Microbubble in an Oscillating Pressure Field

Shin YOSHIZAWA, Yoichiro MATSUMOTO

2005 Volume 24 Issue 4 Pages 405-412
Published: August 25, 2005
Released on J-STAGE: March 07, 2011

DOIhttps://doi.org/10.11426/nagare1982.24.405

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Sonoluminescence and Sonochemistry

Unsolved Problems in Bubble Dynamics

Kyuichi YASUI

2005 Volume 24 Issue 4 Pages 413-420
Published: August 25, 2005
Released on J-STAGE: March 07, 2011

DOIhttps://doi.org/10.11426/nagare1982.24.413

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Propagation of Rectangular Wave in Optimal Velocity Model for Traffic Flow

Ryoichi NAGAI, Tsunetoshi ONOUCHI, Takashi NAGATANI

2005 Volume 24 Issue 4 Pages 421-429
Published: August 25, 2005
Released on J-STAGE: March 07, 2011

DOIhttps://doi.org/10.11426/nagare1982.24.421

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We study the transformation of a traveling jam with the pulse form in the single-lane traffic flow by using the optimal velocity model. The jam propagates with changing the initial form. It is shown that the pulse jam at the initial stage changes to the three types of nonlinear waves, appearing respectively in the three distinct regions in (Δχ_1.0, α) -space where Δχ _1.0 is the half of pulse strength at the initial stage and a is the sensitivity. Two waves of them form the plateaus. The value of the headway at the plateau is compared with the neutral stability and coexisting points. It is shown that the formation of plateaus is due to the phase separation in the dynamical jamming transition. It is found that the transition line between two waves forming plateaus is consistent with the coexisting line in the jamming transition.

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Development of high-resolution method for the vortex introduction with redistribution model of vorticity in vortex method

Hiroshi IMAMURA, Daisuke TAKEZAKI, Yutaka HASEGAWA, Koji KIKUYAMA

2005 Volume 24 Issue 4 Pages 431-442
Published: August 25, 2005
Released on J-STAGE: March 07, 2011

DOIhttps://doi.org/10.11426/nagare1982.24.431

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Appling the vortex method into flow simulations around solid body, it is important for accurate simulations how to implement the vortex creation near the wall in association with the boundary conditions and to resolve the boundary layer flow near the wall. In this paper, a method is proposed for introducing vortices on the wall from the physical aspects together with a redistribution model of the vorticity on the basis of the core-spreading method. This method is applied to flow simulations around a two-dimensional cylinder impulsively started, and the vorticity distributions near the wall are depicted in detail. The result for the vorticity diffusion from the wall by proposed model agrees well with the theoretical solution. The simulated flow shows good agreement with experimental results and the other CFD simulations.

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3. Vortex sheet

Yasuhide FUKUMOTO

2005 Volume 24 Issue 4 Pages 443-457
Published: August 25, 2005
Released on J-STAGE: March 07, 2011

DOIhttps://doi.org/10.11426/nagare1982.24.443

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