著者

岩崎 良之

出版者

THE JAPANESE SOCIETY FOR MULTIPHASE FLOW

雑誌

混相流 (ISSN:09142843)

巻号頁・発行日

vol.27, no.2, pp.126-132, 2013-06-15 (Released:2013-07-11)

参考文献数

10

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From ancient times fire has been extinguished mainly by using water. But there may be some problems in large amount of water discharge against fire, such as enough water volume for fire extinguishing may not be secured in case of large-scale natural disasters, and also secondary damage may be caused by discharged water. CAFS, one of fire extinguishing method by using air foam, is the solution because it utilizes small amount of water very efficiently. This report presents an overview of fire extinguishing with air foam, how to generate it and verification experiments of fire extinguishing effect with CAFS foam in MORITA Corporation.

著者

山根 賢治

出版者

THE JAPANESE SOCIETY FOR MULTIPHASE FLOW

雑誌

混相流 (ISSN:09142843)

巻号頁・発行日

vol.29, no.1, pp.35-41, 2015-03-15 (Released:2015-05-02)

参考文献数

8

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To control safe administration of injection product, we should carefully handle foreign matters. Hospital sometimes encountered cases where insoluble matter formed during the preparation of injections. In order to deal with this situation, we discussed the mechanism of formation of the insoluble matter and countermeasures on manufacturing process. Insoluble matter was a critical problem for quality of drug product of injections. In this report, the review for general approach for the foreign matters on injection product was reported.

著者

川原 顕磨呂 佐田富 道雄 斉藤 栄俊 佐藤 泰生

出版者

THE JAPANESE SOCIETY FOR MULTIPHASE FLOW

雑誌

混相流 (ISSN:09142843)

巻号頁・発行日

vol.9, no.1, pp.26-36, 1995

被引用文献数

2

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To provide data necessary for modeling turbulent mixing between subchannels in a nuclear fuel rod bundle, three experiments were made in series for equilibrium two-phase flows, in which net mass exchange does not occur between subchannels for each phase. The first one was the measurement of turbulent mixing rates of both gas and liquid phases by a tracer technique, using air and water as the working fluids. Three kinds of vertical test channels consisting of two subchannels were used. The data have shown that the turbulent mixing rate of each phase in a two-phase flow is strongly dependent on flow regime. So, to see the relation between turbulent mixing and two-phase flow configuration in the subchannels, the second experiment, flow visualization, was made. It was observed in slug and churn flows that a lateral inter-subchannel liquid flow of a large scale is caused by the successive axial transit of large gas bubbles in each subchannel, and the turbulent mixing for the liquid phase is dominated by this lateral flow. To investigate a driving force of such large scale lateral flow, the third experiment, the measurement of an instantaneous pressure differential between the subchannels, was made. The result showed that there is a close relationship between the liquid phase mixing rate and the magnitude of the pressure differential fluctuation.