巻号一覧
7 巻 (1988)
- 4 号 p. 295-
- 3 号 p. 201-
- 2 号 p. 101-
- 1 号 p. 1-
7 巻, 1 号
選択された号の論文の6件中1～6を表示しています
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木村 竜治1988 年 7 巻 1 号 p. 1-2
発行日: 1988/03/30
公開日: 2011/03/07
ジャーナル フリーPDF形式でダウンロード (4402K) -
柳瀬 真一郎1988 年 7 巻 1 号 p. 3-14
発行日: 1988/03/30
公開日: 2011/03/07
ジャーナル フリーThis 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.抄録全体を表示PDF形式でダウンロード (1637K) -
栗木 恭一1988 年 7 巻 1 号 p. 15-27
発行日: 1988/03/30
公開日: 2011/03/07
ジャーナル フリーThe 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.抄録全体を表示PDF形式でダウンロード (5001K) -
伊藤 学1988 年 7 巻 1 号 p. 28-35
発行日: 1988/03/30
公開日: 2011/03/07
ジャーナル フリーThe 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.抄録全体を表示PDF形式でダウンロード (8099K) -
時間に依存する渦動粘性係数と乱流拡散係数を用いた数値解析伊福 誠, 柿沼 忠男1988 年 7 巻 1 号 p. 36-46
発行日: 1988/03/30
公開日: 2011/03/07
ジャーナル フリー底面近傍の摩擦応力を時間的に変化し鉛直方向に線形である渦動粘性係数を用いて評価する場合とPrandtlの混合距離理論を用いて評価する場合について, 乱流境界層理論に基づいて境界層内の流速を計算し, 次にKalkanisに従い底面での濃度を評価するとともに時間的に変化する乱流拡散係数を用いて乱流拡散理論に基づいて流体中の浮遊砂の濃度分布を求めた.その結果, 時間的に変化する渦動粘性係数, 乱流拡散係数を用いた解析結果は, 時間的に一定の渦動粘性係数, 乱流拡散係数を用いた場合よりも現地の砕波帯で得た浮遊砂濃度の平均値の分布, 一波毎に岸向き流速の最大値と浮遊砂濃度の最高値との位相差を見出して得た位相差の頻度分布をよく説開することが明らかになった.抄録全体を表示PDF形式でダウンロード (1575K) -
中村 正義1988 年 7 巻 1 号 p. 47-61
発行日: 1988/03/30
公開日: 2011/03/07
ジャーナル フリーThis 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.抄録全体を表示PDF形式でダウンロード (4959K)
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