著者

西尾 茂 中村 研 杉井 康彦 奥野 武俊

出版者

社団法人 可視化情報学会

雑誌

可視化情報学会誌 (ISSN:09164731)

巻号頁・発行日

vol.26, no.100, pp.Plate37-Plate37, 2006-01-01 (Released:2009-07-31)

著者

三輪 誠 三村 治夫 阿部 晃久 西尾 茂 武田 実

出版者

The Japan Institute of Marine Engineering

雑誌

Marine engineering : journal of the Japan Institution of Marine Engineering = マリンエンジニアリング : 日本マリンエンジニアリング学会誌 (ISSN:13461427)

巻号頁・発行日

vol.44, no.3, pp.470-476, 2009-05-01

被引用文献数

2

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Pathogenic and fecal bacteria, such as Vibrio cholerae and Escherichia coli, possibly invade via seawater. This may expose marine engineers to an intrinsic risk of infection when they carry out routine maintenance. We therefore investigated, following the voyage, the seawater taken into a ship's engine-room. As for the populations, they varied from 102.9 to 105.9 colony-forming units (cfu) ml-1. A correlation coefficient between the population and the in situ seawater temperature was 0.71, 0.30, and 0.068 for the samples taken from calls facing to the ocean (n = 6), the Inland Sea (n = 12), and the coastal area around the Pacific Ocean (n = 16), respectively. An occupational ratio of Vibrio sp. population increases when the seawater was retained for more than three months in the condensers for the air conditioner and the drain cooler. Although three strains were detected from the drain cooler, those of which had ability to make yellow-colored colonies on a selective plate at 37°C and left for 6 months. It was identified as to be Aerococcus viridans. In that species, the lobster pathogen is included, but nothing human. So far examined is pathogenic V. cholerae, which was not detected in all the samples taken from the engine-room. These results indicate that the possibility of infection of marine engineers to be quite low when they do the maintenance on board in the coastal area and the Inland Sea of Japan

著者

西尾 茂 林 祐司

出版者

公益社団法人日本船舶海洋工学会

雑誌

らん : 纜 (ISSN:09160981)

巻号頁・発行日

no.58, pp.25-27, 2002-12-30

著者

大久保 英敏 西尾 茂文

出版者

社団法人日本鉄鋼協会

雑誌

鐵と鋼 : 日本鐡鋼協會々誌 (ISSN:00211575)

巻号頁・発行日

vol.79, no.4, pp.497-503, 1993-04-01

被引用文献数

1

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To predict mist cooling heat transfer, it is necessary to understand systematically this phenomena. However, since there are many parameters affecting mist cooling heat transfer and the effects of these parameters are very complicated, it is still a difficult task to predict mist cooling heat transfer for actual systems. In the present paper, the effect of surface diameter on mist cooling heat transfer was experimentally investigated. To do this, the diameter of test plates was varied from 10 to 30mm. Mist cooling experiments were conducted for horizontal upward-facing surfaces made of silver. The experimental results obtained in this study show that the diameter of the plate affects the heat transfer coefficient of mist cooling in the high-temperature region corresponding to the film boiling region on the boiling curve. Next, the correlating equations for the heat transfer characteristics of mist cooling in the high-temperature region are developed accounting for the effects of volumetric droplet flow rate and surface parameters including the effect of the surface diameter. These correlating equations are in good agreement with a number of experimental data.

著者

杉井 康彦 西尾 茂 岡本 孝司 中野 厚史 南山 求 新見 英幸

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. B編 = Transactions of the Japan Society of Mechanical Engineers. B (ISSN:03875016)

巻号頁・発行日

vol.70, no.691, pp.701-706, 2004-03-25

参考文献数

18

被引用文献数

2

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Blood flow in microvessels, such as arterioles, capillaries and venules, whose diameter ranges from 5 to 50μm, is responsible for the maintenance of tissue and organ functions. The measurement of microvascular blood flow velocity with high measurement accuracy is essential for basic and clinical studies in the assessment of flow shear stress at the vascular wall in relation to substance exchange between blood and tissue. This paper aimed to evaluate the velocity field of blood flow in microvessels with high spatial and temporal resolution. By using micro PIV system, the velocity distributions of red blood cells flowing in rat mesenteric arterioles, including near the wall in the axisymmetric plane, were obtained. Ensemble averaged time-series of velocity profiles in the cross-sections were calculated for comparison. It was shown that the arteriole velocity profile was blunt in the center region of the vessel cross-section while it was steep in the near wall region.

著者

西尾 茂文 坂口 和貴

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. B編 (ISSN:03875016)

巻号頁・発行日

vol.53, no.490, pp.1781-1787, 1987-06-25

被引用文献数

1

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This paper presents experimental results on the real value of the minimum-heat-flux (MHF) -point temperature for subcooled pool boiling of water from a horizontal cylinder and an advanced form of the correlation for subcooled film-boiling heat-transfer proposed in the previous paper. First, experiments to observe the collapse process of film boiling were conducted by using a high speed video. The experimental results show that the collapse mode is classified into the propagative collapse with a precursory local-collapse and the coherent collapse. Second, the propagation velocity of collapse front and the mean surface temperature upon the local collapse followed by the propagative collapse were measured. The experimental results show that, for higher propagation-velocities, the MHF-point temperature decreases and approaches the value upon coherent collapse which has only a slight dependence on liquid subcooling. Finally, an advanced form of the correlation for subcooled film-boiling heat-transfer reported in the previous paper is proposed. This equation is in good agreement with the present data of of water at subatmospheric pressures and the existing data of liquid sodium and freon R-11 at atmospheric pressure and pressurized water.