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Volume 17, Issue 65
Displaying 1-9 of 9 articles from this issue
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Tadashi MASUDA1997 Volume 17 Issue 65 Pages 91-95_1
Published: April 01, 1997
Released on J-STAGE: July 31, 2009
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Makoto SHIMOJO, Shunji SHIMIZU, Shigeru SATO, Yoshikazu SEKI1997 Volume 17 Issue 65 Pages 96-101_1
Published: April 01, 1997
Released on J-STAGE: July 31, 2009
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Masanobu YAMAMOTO1997 Volume 17 Issue 65 Pages 102-107_2
Published: April 01, 1997
Released on J-STAGE: July 31, 2009
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Yoshimichi TANIDA1997 Volume 17 Issue 65 Pages 108-113
Published: April 01, 1997
Released on J-STAGE: July 31, 2009
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"Observation of Nucleate Boiling Regime, Critical Heat Flux Point and Film Boiling Regime"Masahiro YOSHIWARA1997 Volume 17 Issue 65 Pages 114-119
Published: April 01, 1997
Released on J-STAGE: July 31, 2009
JOURNAL FREE ACCESSSaturation pool boiling heat transfer from a horizontal cylinder to distilled water is studied under an atmospheric pressure condition. The horizontal cylinder is made of platinum. Diameter and length of the cylinder are 0.8mm and 59.7mm, respectively. The horizontal cylinder is heated by a D. C. electric power source. Vapor bubbles on horizontal cylinder are photographed by a flash (25μs) of stroboscope. Vapor bubbles of nucleate boiling regime, critical heat flux point and film boiling regime are visualized.View full abstractDownload PDF (4677K) -
Takashi YUMINO, Atsushi IWASAWA, Yasuharu KATO, Yoshimichi TANIDA1997 Volume 17 Issue 65 Pages 120-127
Published: April 01, 1997
Released on J-STAGE: July 31, 2009
JOURNAL FREE ACCESSThe purpose of the present paper is to study the characteristics of flow and gas exchange in the pulsating flow in the respiratory net work both by flow visualization and by numerical simulation.
The pulsating flow in a two-dimensional duct was visualized by the smoke-wire method, and its time-dependent velocity profile in the duct was measured with reasonable accuracy. The behavior of the pulsating flow around the duct intake was observed by the tobacco-smoke method and it was shown that the breathing air causes the streaming that brings about gas exchange.
The numerical results confirmed the experimental results and predicted the behavior of gas diffusion at the intake.View full abstractDownload PDF (3857K) -
2nd Report-Dynamic analysis of bubble motionBozin DONEVSKI, Tetsuo SAGA, Toshio KOBAYASHI, Shigeki SEGAWA1997 Volume 17 Issue 65 Pages 128-132
Published: April 01, 1997
Released on J-STAGE: July 31, 2009
JOURNAL FREE ACCESSIn the second report, the extraction technique of the bubble boundary described in the first report is applied to analyze the subcooled flow boiling in the vertical annular tube. The procedure determines bubble size and shape, interfacial area, information about void formation, bubble growth or collapse, position and velocity of bubbles, bubble life time and bubble trajectory for particular condition. These parameters are of fundamental importance in two fluid model formulation, especially in relation to the rational design and effective operation of facilities in the energy power systems and in various industrial processes.View full abstractDownload PDF (3110K) -
Shinzaburo UMEDA, Wen-Jei YANG, Yoshiaki UETANI1997 Volume 17 Issue 65 Pages 133-140
Published: April 01, 1997
Released on J-STAGE: July 31, 2009
JOURNAL FREE ACCESSIn this study, experiments in two intersecting ducts with a circular perforated zone are performed to investigate secondary flow and mixing in the perforated zone when changing the conditions of the intersecting angles and the upper water levels. The flow pattern in the perforated zone is visualized by the particle tracing method and the LDV. The flow rates in the downstream ducts are measured by hydrometry. Colorimeters, which have been used with color video images to analyze the visual field of complicated scenes, such as landscapes and building interiors, are used here to examine mixing. The characteristics of the secondary flow, the resistance and the mixing process in the perforated zone are clarified.View full abstractDownload PDF (3871K) -
Nozomi SUGIURA, Masashi NISHIGAKI, Yuji IKEDA, Tsuyoshi NAKAJIMA1997 Volume 17 Issue 65 Pages 141-148
Published: April 01, 1997
Released on J-STAGE: July 31, 2009
JOURNAL FREE ACCESSThe oscillating flow in a non-sidewall fluidic gas flowmeter was investigated. LDV measurements were carried out at 624 points in the meter and under the condition of Re=1140, evaluated using the nozzle length as the representative diameter, where the oscillating frequency was 37 Hz. The velocity variation at each point was phase locked by using pressure signal detected at the nozzle outlet. Two dimensional flow visualization was succeeded in terms of flow vector, streamlines and vorticity, and turbulent kinetic energy was also estimated in the meter. The results revealed the switching and bifurcation of nozzle jet and the vortex shedding in the wake. On the basis of the visualized flow, a model of the essential flow pattern was suggested.View full abstractDownload PDF (3893K)
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