著者

鈴木 勲

出版者

社団法人 日本流体力学会

雑誌

日本流体力学会誌「ながれ」 (ISSN:02863154)

巻号頁・発行日

vol.17, no.2, pp.134-140, 1998-04-30 (Released:2011-03-07)

参考文献数

10

著者

姫野 龍太郎

出版者

社団法人 日本流体力学会

雑誌

日本流体力学会誌「ながれ」 (ISSN:02863154)

巻号頁・発行日

vol.23, no.6, pp.437-443, 2004-12-25 (Released:2011-03-07)

参考文献数

10

著者

坂尾 富士彦

出版者

社団法人 日本流体力学会

雑誌

日本流体力学会誌「ながれ」 (ISSN:02863154)

巻号頁・発行日

vol.2, no.2, pp.166-176, 1983-06-20 (Released:2011-03-07)

参考文献数

17

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空気中空気の軸対称・亜音速・常温噴流の発する音が, ノズル出口での流れの状態によって受ける変化を実験によって調べた.流れはほぼ一様な流速で乱れの少い主流と, 境界層とから成り, 境界層の状態は層流と乱流に変えられる.また境界層の近傍の主流中に乱れを導入することもできる.実験の結果, 境界層は層流である場合の方が音が大きくなること, その増加は遷移過程で発生する正弦的速度変動に起因すること, 主流の乱れで層流境界層を揺さぶる状態ではそれに加えて低周波数の音も増加することが分った.また境界層が乱流であるとき, その厚さが増すと音はわずかではあるが減少すること, 主流の乱れは一般に音を増加させることが分った.

著者

東野 文男

出版者

社団法人 日本流体力学会

雑誌

日本流体力学会誌「ながれ」 (ISSN:02863154)

巻号頁・発行日

vol.14, no.3, pp.226-232, 1995-06-30 (Released:2011-03-07)

参考文献数

30

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Shock wave phenomena, propagation and reflection, are reviewed. One dimensional propagation of exploding and imploding shock waves based on similarity methods is reviewed and in addition, decay exponents of shock waves analyzed by the shock dynamics theory of Witham are discussed for comparison. The oblique reflection of shock waves on a wall is also reviewed for both steady and quasi-steady flows. Results of numerical simulation for various types of shock reflection are discussed. Recent advances on reflection phenomena are also covered.

著者

小澤 智

出版者

社団法人 日本流体力学会

雑誌

日本流体力学会誌「ながれ」 (ISSN:02863154)

巻号頁・発行日

vol.21, no.4, pp.346-353, 2002-08-25 (Released:2011-08-16)

参考文献数

29

被引用文献数

3

著者

森西 洋平

出版者

社団法人 日本流体力学会

雑誌

日本流体力学会誌「ながれ」 (ISSN:02863154)

巻号頁・発行日

vol.19, no.3, pp.164-170, 2000-06-30 (Released:2011-03-07)

参考文献数

12

被引用文献数

1

著者

新野 宏

出版者

社団法人 日本流体力学会

雑誌

日本流体力学会誌「ながれ」 (ISSN:02863154)

巻号頁・発行日

vol.19, no.2, pp.105-118, 2000-04-30 (Released:2011-03-07)

参考文献数

44

著者

竹野 忠夫

出版者

社団法人 日本流体力学会

雑誌

日本流体力学会誌「ながれ」 (ISSN:02863154)

巻号頁・発行日

vol.8, no.3, pp.205-218, 1989-09-30 (Released:2011-03-07)

参考文献数

14

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The combustion is an extremely complicated phenomenon accompanied by several interactive processes such as chemical reaction, heat and mass transfer and gaseous flow. Therefore, the main stream of the combustion study has so far been the phenomenological approach based on experimental findings, and the contribution of the theoretical approach has been very limited. However, the recent remarkable progress in the asymptotic analysis is going to change this situation. The method was originally adopted in the late '30s by the Russian school, but its full power has been achieved only in the last two decades. In this report, the one-dimensional flame theory with simplified one-step kinetics will be explained, in the beginning, to show how the burning velocity can be given as an eigenvalue of the conservation equations. Then the asymptotic analysis will be introduced to obtain the analytical solution so as to illustrate utility and essential natures of the method.

著者

佐藤 允 青野 光

出版者

日本流体力学会

雑誌

ながれ : 日本流体力学会誌 = Nagare : journal of Japan Society of Fluid Mechanics (ISSN:02863154)

巻号頁・発行日

vol.39, no.4, pp.200-207, 2020-08

著者

内藤 健

出版者

社団法人 日本流体力学会

雑誌

日本流体力学会誌「ながれ」 (ISSN:02863154)

巻号頁・発行日

vol.14, no.4, pp.283-294, 1995-08-31 (Released:2011-03-07)

参考文献数

24

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Tthe flow phenomena in gasoline engines including the air motion, the turbulent premixed-combustion, and the two-phase flows of fuel, are explained by using the numeriacal models. First, the temporal-dependent feature of turbulent flow is analyzed by the visualizations of computation and experiment. Then, it is shown that turbulence plays an important role to the stable combustion and the increase of combustion speed, which are important for realizing lean-buring or low-emission engines. Finally, the fuel-droplets motion is analyzed. The breakup process of droplets due to the wall impingement and the air motion are depicted.

著者

宮嵜 武

出版者

日本流体力学会

雑誌

ながれ : 日本流体力学会誌 = Nagare : journal of Japan Society of Fluid Mechanics (ISSN:02863154)

巻号頁・発行日

vol.39, no.3, pp.138-144, 2020-06

著者

柿本 浩一 渡辺 匡人 江口 実 日比谷 孟俊

出版者

社団法人 日本流体力学会

雑誌

日本流体力学会誌「ながれ」 (ISSN:02863154)

巻号頁・発行日

vol.13, no.1, pp.5-15, 1994-02-28 (Released:2011-03-07)

参考文献数

27

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The quality of large semiconductor crystals grown from silicon melts is significantly affected by the heat and mass transfer in the melt. The characteristics of silicon flows are reviewed by focusing on the Coriolis force in the rotating melt. Description of flow instability is included that shows our level of understanding of melt convection with a low Prandtl number.

著者

水野 信二郎 本地 弘之

出版者

社団法人 日本流体力学会

雑誌

日本流体力学会誌「ながれ」 (ISSN:02863154)

巻号頁・発行日

vol.9, no.1, pp.5-18, 1990-03-30 (Released:2011-03-07)

参考文献数

31

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This report provides a brief overview of ocean currents and their measurements. In particular, some results are reported of recent moored and acoustic measurements of the Kuroshio.

著者

井田 喜明

出版者

社団法人 日本流体力学会

雑誌

日本流体力学会誌「ながれ」 (ISSN:02863154)

巻号頁・発行日

vol.6, no.2, pp.150-159, 1987-06-30 (Released:2011-03-07)

参考文献数

11

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Magma is generated by partial melting of rocks and ascends due to its buoyancy in interstitial conduits through the country rock. When the country rock creeps, the magma conduits are deformable. A vertical cylindrical conduit that is deformable with time and space is considered for the present analysis, assuming that both country rock and magma are viscous fluids. Here the fluid representing the country rock has a significantly higher viscosity than magma. This analysis can be generalized to permeable flow with a network of deformable magma paths. The theory gives such a solution that a bulge of magma conduit propagates upward at a constant speed without change of wave form. Such a stationary wave resumes its form after collision with another wave so that it may be called magma soliton. The propagation velocity of a magma soliton increases with increasing amplitude. If magma flux is changed to a higher value at a certain depth, a new state of greater flux is established upward, creating new magma solitons at the moving tip. This process of soliton creation might be applicable for explaining the episodicity of volcanic eruptions.

著者

徳永 宏

出版者

社団法人 日本流体力学会

雑誌

日本流体力学会誌「ながれ」 (ISSN:02863154)

巻号頁・発行日

vol.5, no.1, pp.27-33, 1986-03-31 (Released:2011-03-07)

参考文献数

8

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Efficient direct simulation methods for instability of parallel flows as well as non-parallel flow are proposed. The computational method consists of the 4-th order accurate modified differential quadrature method for spatial discretization, Runge-Kutta-Gill time integration scheme and the new direct Poisson solver with 4-th order accuracy. The present methods are at first applied to direct simulation on instability of plane and Hagen Poiseuille flows, which are parallel flows, and it is shown that the temporal evolution of the perturbation superposed on the basic flows is simulated accurately on comparison with pseudo-spectral and Chebyshev polynomial expansion method. Next this method is applied to the direct simulation of spatial instability of boundary layer, which is non-parallel flow, and its efficiency is confirmed.

著者

神部 勉

出版者

社団法人 日本流体力学会

雑誌

日本流体力学会誌「ながれ」 (ISSN:02863154)

巻号頁・発行日

vol.20, no.3, pp.174-186, 2001-06-25 (Released:2011-03-07)

参考文献数

37

被引用文献数

1

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乱流あるいは渦運動から縦波の音波が発生する.また音波と流れが相互作用して散乱波が生ずる.そのような現象の物理的メカニズムを簡潔に解説することがここでの意図である.先ず初めに, 流れと音が相互に関わりあう現象について歴史的にたどってみる.

著者

郡司 博史 石井 秀樹 斉藤 亜矢 酒井 敏

出版者

社団法人 日本流体力学会

雑誌

日本流体力学会誌「ながれ」 (ISSN:02863154)

巻号頁・発行日

vol.22, no.6, pp.499-500, 2003

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If liquid drop collides with a thin fluid layer, crown-like structure (milk crown) will be formed. In such phenomenon, surface tension is dominant, and a time scale is very short. To catch a continuous image of such phenomena, expensive equipment, such as a high-speed camera, would be required. Therefore, systematic researches which change parameters, such as collision speed of liquid, were not done. Then, we considered how to record with a cheap commercial digital video camera, conducted the systematic experiment by this method, and analyzed the obtained picture. Consequently, we found that the diameter of a crown was proportional to the 1/4th power of the lapsed time after liquid drop collides. That of the trace after a crown disappears was proportional to the 1/2nd power of the lapsed time. The domain where the diameter of a crown is proportional to the 1/2nd power of lapsed time has only been found in the trace after a crown disappeared. We think that the crown turns into the capillary wave during its collapse. We found that the time that the crown grows up is longer than the crown falls down. Considering a simplified model concerning of mass change and surface tension of the crown upper part, we could reproduce the asymmetry.

著者

前田 信治

出版者

社団法人 日本流体力学会

雑誌

日本流体力学会誌「ながれ」 (ISSN:02863154)

巻号頁・発行日

vol.21, no.2, pp.129-134, 2002-04-25 (Released:2011-03-07)

参考文献数

31

被引用文献数

2

著者

菊地 章太 Noritaka KIKUCHI 東洋大学ライフデザイン学部 Faculty of Human Life Design Toyo University

出版者

日本流体力学会

雑誌

ながれ : 日本流体力学会誌 (ISSN:02863154)

巻号頁・発行日

vol.28, no.6, pp.443-446, 2009-12-25

参考文献数

12

著者

増田 章

出版者

社団法人 日本流体力学会

雑誌

日本流体力学会誌「ながれ」 (ISSN:02863154)

巻号頁・発行日

vol.12, no.4, pp.369-387, 1993-12-30 (Released:2011-03-07)

参考文献数

41

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Global distribution of the density of sea water is maintained primarily by polar cooling and tropical heating together with polar precipitation and subtropical evaporation at the sea surface. This thermohaline forcing drives a global convection called the deep ocean general circulation. Carried by the circulation, sea water goes around the world oceans on a time scale as long as 1000 years, the longest time scale of the fluid earth. The deep circulation therefore is supposed to dominate the long-term variability of the climate of our aqua-planet.Long history of oceanographic study has accumulated a vast amount of hydrographic data and established rather reliable though rough global maps of water properties in deep oceans, such as temperature, salinity, dissolved oxygen, silica, nutrients, and so on. Details have been known only little, however, on how water actually circulates in the world oceans from the surface to the bottom, from polar to tropical regions, and from west to east or vice versa, though recent hydrographic explorations have gradually revealed finer structure of circulation. Much less has been understood about what dynamics is responsible for the present state of deep circulation and distribution of water properties.