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Volume 7 (1988)
- Issue 4 Pages 295-
- Issue 3 Pages 201-
- Issue 2 Pages 101-
- Issue 1 Pages 1-
Predecessor
Volume 7, Issue 1
Displaying 1-6 of 6 articles from this issue
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Ryuji KIMURA1988 Volume 7 Issue 1 Pages 1-2
Published: March 30, 1988
Released on J-STAGE: March 07, 2011
JOURNAL FREE ACCESSDownload PDF (4402K) -
Shinichiro YANASE1988 Volume 7 Issue 1 Pages 3-14
Published: March 30, 1988
Released on J-STAGE: March 07, 2011
JOURNAL FREE ACCESSThis is a review of the theoretical investigations on nonlinear phenomena and chaos in double-diffusive (thermosolutal) convection. An emphasis is put on the reality of the chaotic solution of a 5-mode truncated system. In double-diffusive convection, chaos which appears in the solution of partial differential equations is qualitatively manifested by the solution of the truncated system. This article has 6 sections. § 1 presents a short history of the studies of double-diffusive convection. §§ 2 and 3 are preliminary parts showing linear and weakly nonlinear stability analysis. The truncated system is treated in § 4, and the numerical solution of partial differential equations is shown in § 5. The last section presents two additional topics.View full abstractDownload PDF (1637K) -
Kyoichi KURIKI1988 Volume 7 Issue 1 Pages 15-27
Published: March 30, 1988
Released on J-STAGE: March 07, 2011
JOURNAL FREE ACCESSThe Magnetoplasmadynamic (MPD) arcjet is a future promising electric propulsion to be applied for interplanetary spacecraft and space stations. The enhancement of its thrust efficiency requires full understanding of the electromagnetic and electrothermal acceleration, the chemical kinetics including ionization, the electro-hydrodynamic boundary layer, and the plasma instabilities. The rigorous approach in constructing design guidelines for the MPD arcjet is to decompose the experimentally observed phenomena into the elementary processes as listed above and synthesize them into a simple and plausible model. In the present paper are reviewed such analytic and synthetic works with an emphasis on the magnetogasdynamic (MGD) phenomena.View full abstractDownload PDF (5001K) -
Manabu ITO1988 Volume 7 Issue 1 Pages 28-35
Published: March 30, 1988
Released on J-STAGE: March 07, 2011
JOURNAL FREE ACCESSThe effects of natural wind on human life and environment are full of variety. Even if one considers only the wind-induced hazards in structures, which are reviewed in this paper, there are also many types of phenomena.
The paper presents the past experiences on the wind-induced hazards occurred in buildings, towers, bridges and cable structures. The phenomena described here are both static and dynamic. Finally, the causes of these wind-induced hazards are discussed.View full abstractDownload PDF (8099K) -
Numerical Analysis Using Time-dependent Eddy Viscosity and Turbulent Diffusion CoefficientMakoto IFUKU, Tadao KAKINUMA1988 Volume 7 Issue 1 Pages 36-46
Published: March 30, 1988
Released on J-STAGE: March 07, 2011
JOURNAL FREE ACCESSNumerical analysis was carried out to obtain the near-bottom flow velocity and the suspended sediment concentration, which were compared to authors' and Nielsen's observed data. The near-bottom flow velocity was computed by the turbulent boundary layer theory with the time-dependent eddy viscosity, and the suspended sediment concentration was computed by the turbulent diffusion theory with the time-dependent turbulent diffusion coefficient, using the concentration of reference level estimated by Kalkanis' theory. The computed phase lag between the cross-shore velocity and suspended sediment concentration agrees well with that observed. The computed distributions of the mean suspended sediment concentration with the time-dependent turbulent diffusion coefficient proposed by authors agrees well with the authors' and Nielsens' observed distributions.View full abstractDownload PDF (1575K) -
Masayoshi NAKAMURA1988 Volume 7 Issue 1 Pages 47-61
Published: March 30, 1988
Released on J-STAGE: March 07, 2011
JOURNAL FREE ACCESSThis paper deals with the generation of a grid for a finite difference calculation of flows around an aircraft in Cartesian coordinates. The main equations governing the generation are plane and line equations in the three-dimensional field. The external form of the aircraft is shaped from a large number of small triangular planes. The grid is formed by three groups of lines perpendicularly intersecting each other. The quantitave relation between the external form of the aircraft and points of the grid is obtained by algedraic treatment of the plane and line equations. In the same manner, views of the aircraft are drawn using these equations.View full abstractDownload PDF (4959K)
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