Journal of Japan Society of Fluid Mechanics

[title in Japanese]

[in Japanese]

1983 Volume 2 Issue 4 Pages 325-326
Published: December 15, 1983
Released on J-STAGE: March 07, 2011

DOIhttps://doi.org/10.11426/nagare1982.2.325

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[title in Japanese]

[in Japanese]

1983 Volume 2 Issue 4 Pages 327-340
Published: December 15, 1983
Released on J-STAGE: March 07, 2011

DOIhttps://doi.org/10.11426/nagare1982.2.327

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[title in Japanese]

Satoru HONDA

1983 Volume 2 Issue 4 Pages 341-354
Published: December 15, 1983
Released on J-STAGE: March 07, 2011

DOIhttps://doi.org/10.11426/nagare1982.2.341

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[title in Japanese]

[in Japanese]

1983 Volume 2 Issue 4 Pages 355-360
Published: December 15, 1983
Released on J-STAGE: March 07, 2011

DOIhttps://doi.org/10.11426/nagare1982.2.355

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[title in Japanese]

[in Japanese]

1983 Volume 2 Issue 4 Pages 361-370
Published: December 15, 1983
Released on J-STAGE: March 07, 2011

DOIhttps://doi.org/10.11426/nagare1982.2.361

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Mass Transport Velocity of Nonlinear Shallow Water Waves

Akira ISHIDA, Wataru KIOKA, Kouji ASADA

1983 Volume 2 Issue 4 Pages 371-380
Published: December 15, 1983
Released on J-STAGE: March 07, 2011

DOIhttps://doi.org/10.11426/nagare1982.2.371

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From sand bed model tests for waves of the shallow water range, it has become clear that the mass transport is remarkably different from the results predicted by existing theories based on permanent wave theories which take account of the viscosity. The experimental results suggest that the mass transport can be significantly affected by the presence of secondary waves but it can be less significantly affected by the viscosity for the case of movable bed. It is found from calculating the displacement of water particles in Lagrangian manner that the degree of spatially varying component of the mass-transport velocity becomes more pronounced with the increase of Ursell number. This variable component may cause the circulation in the closed-ended laboratory channel.

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Numerical Calculation of Free Jet with High Pressure Ratio

Michiru YASUHARA, Yasuaki TANIGUCHI

1983 Volume 2 Issue 4 Pages 381-390
Published: December 15, 1983
Released on J-STAGE: March 07, 2011

DOIhttps://doi.org/10.11426/nagare1982.2.381

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Inviscid flows of free jet are numerically calculatd by the finite difference mothod for pressure ratios 20 and 12.2, respectively. The results are shown to give good comparisons with experimental density field pictures taken by the electron beam method, as well as with experience formulae. Also the numerical results show the mechanism of aerodynamic accelelation of the subsonic flow up to slightly supersonic flow, behind the Mach disc.

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Ion Distribution Functions in Strong Ion Shock Waves

Gyo SAKAGUCHI, Kanji ABE

1983 Volume 2 Issue 4 Pages 391-402
Published: December 15, 1983
Released on J-STAGE: March 07, 2011

DOIhttps://doi.org/10.11426/nagare1982.2.391

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Structures of ion shock waves are investigated on the basis of the Fokker-Planck equation. The main purpose of this paper is to obtain rigorous solutions of the Fokker-Planck equation. The ion distribution function in the transition region of the shock wave is expanded in terms of the three-dimensional Hermite polynomials. To determine the expansion coefficients, the moment method is employed. By using five expansion coefficients of the lowest order, asymptotic solutions in the vicinities of the upstream and downstream equilibrium states are obtained.
In the downstream region of strong shock wave, the ion distribution function has a double-humped shape. The second peak of the double-humped ion distribution function is lower than that obtained from the Mott-Smith method. In the transition region of weak shock wave, the ion distribution function has only one peak.

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A Note on Linearisation of a Hot-Wire Anemometer

Fujihiko SAKAO

1983 Volume 2 Issue 4 Pages 403-407
Published: December 15, 1983
Released on J-STAGE: March 07, 2011

DOIhttps://doi.org/10.11426/nagare1982.2.403

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The heat transfer rate of hot wires has been measured at three points of wind velocity, namely zero, maximum, and an intermediate values, during their life-period. It can be deduced that the zero wind velocity heat transfer is liable to drift in different way from the others, and that determining lineariser constants on the base of the zero velocity heat transfer may result in error of 10%, or in unfavourable cases up to 20%, in small perturbation sensitivity de/dUat higher wind velocity.

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[title in Japanese]

[in Japanese]

1983 Volume 2 Issue 4 Pages 408
Published: December 15, 1983
Released on J-STAGE: March 07, 2011

DOIhttps://doi.org/10.11426/nagare1982.2.408

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