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Ogi, Hiromichi*; Shiina, Yasuaki; Inagaki, Terumi*
Nihon Kikai Gakkai Rombunshu, B, 74(748), p.2588 - 2597, 2008/12
no abstracts in English
Shiina, Yasuaki; Hishida, Makoto*
Nihon Kikai Gakkai Tohoku Shibu Dai-43-Ki Sokai, Koenkai Koen Rombunshu, p.163 - 164, 2008/03
no abstracts in English
Shiina, Yasuaki; Ogi, Hiromichi*; Inagaki, Terumi*
Nihon Kikai Gakkai Netsu Kogaku Konfarensu 2007 Koen Rombunshu, p.245 - 246, 2007/11
no abstracts in English
Shiina, Yasuaki; Hishida, Makoto*
Nihon Kikai Gakkai Rombunshu, B, 73(733), p.1876 - 1883, 2007/09
no abstracts in English
Shiina, Yasuaki; Ishikawa, Kota*; Hishida, Makoto*
Nihon Kikai Gakkai Rombunshu, B, 73(728), p.1045 - 1051, 2007/04
Heat transfer characteristics near the critical Rayleigh number for the onset of natural convection of horizontal anisotropic porous fluid layer heated from below with thin cylindrical rods inserted with high porosity above 0.822 to unity were studied by an analysis and an experiment. The critical Rayleigh number and dependence of Nusselt number on the Rayleigh number were analysed by linear stability theory and series expansion method on the basis of Darcy flow assumption. Critical Rayleigh number, increased with decrease in the porosity, was higher for the experiment than for the analysis but the difference was decreased with decrease in Darcy number. Experimental Nusselt number was considerably decreased with decrease in the porosity near unity although is rather same as the case of Benard convection without cylindrical rods. The experimental Nusselt number can be expressed by one correlation curve when Nusselt number is plotted against Darcy number of the present experiment was rather large to satisfy Darcy flow assumption. Experiment shows that Darcy flow assumption will be satisfied for Darcy number.
Shiina, Yasuaki; Hishida, Makoto*; Ishikawa, Kota*
Nihon Kikai Gakkai Tohoku Shibu Dai-42-Ki Sokai, Koenkai Koen Rombunshu, p.137 - 138, 2007/03
no abstracts in English
Shiina, Yasuaki
Nihon Genshiryoku Gakkai Wabun Rombunshi, 5(3), p.190 - 199, 2006/09
no abstracts in English
Shiina, Yasuaki; Ishikawa, Kota*; Hishida, Makoto*; Tanaka, Gaku*
Nihon Kikai Gakkai 2006-Nendo Nenji Taikai Koen Rombunshu, Vol.3, p.173 - 174, 2006/09
no abstracts in English
Nemoto, Hiroyuki*; Ogi, Hiromichi*; Shiina, Yasuaki; Inagaki, Terumi*
Kashika Joho Gakkai-Shi, 26(Suppl.1), p.1 - 4, 2006/07
no abstracts in English
Shiina, Yasuaki; Nemoto, Hiroyuki*; Ogi, Hiromichi*; Inagaki, Terumi*
Dai-43-Kai Nihon Dennetsu Shimpojiumu Koen Rombunshu, p.415 - 416, 2006/05
no abstracts in English
Ogi, Hiromichi*; Shiina, Yasuaki; Inagaki, Terumi*
Dai-43-Kai Nihon Dennetsu Shimpojiumu Koen Rombunshu, p.413 - 414, 2006/05
no abstracts in English
Shiina, Yasuaki; Ogi, Hiromichi*; Inagaki, Terumi*
Nihon Kikai Gakkai Tohoku Shibu Dai-41-Ki Sokai, Koenkai Koen Rombunshu, p.83 - 84, 2006/03
no abstracts in English
Shiina, Yasuaki; Takizuka, Takakazu; Kasahara, Seiji
Nihon Genshiryoku Gakkai-Shi, 48(2), p.58 - 59, 2006/02
no abstracts in English
Inagaki, Terumi*; Hatori, Masakazu*; Suzuki, Tomohiro*; Shiina, Yasuaki
Journal of Visualization, 9(2), p.145 - 160, 2006/00
Times Cited Count：10 Percentile：46.59(Computer Science, Interdisciplinary Applications)no abstracts in English
Inaba, Yoshitomo; Zhang, Y.*; Takeda, Tetsuaki; Shiina, Yasuaki
Heat Transfer-Asian Research, 34(5), p.293 - 308, 2005/07
Water cooling panels have been adopted as the vessel cooling system of the HTTR to cool the reactor core indirectly by natural convection and thermal radiation. In order to investigate the heat transfer characteristics of high temperature gas in a vertical annular space between the reactor pressure vessel and cooling panels of the HTTR, we carried out experiments and numerical analyses on natural convection heat transfer coupled with thermal radiation heat transfer in an annulus between two vertical concentric cylinders with the inner cylinder heated and the outer cylinder cooled. In the present experiments, Rayleigh number based on the height of the annulus ranged from 2.0
10
to 5.410 for helium gas and from 1.210
to 3.510 for nitrogen gas. The numerical results were in good agreement with the experimental ones regarding the surface temperatures of the heating and cooling walls. As a result of the experiments and the numerical analyses, the heat transfer coefficient of natural convection coupled with thermal radiation was obtained.
Shiina, Yasuaki; Inagaki, Terumi*
International Journal of Heat and Mass Transfer, 48(2), p.373 - 383, 2005/01
Times Cited Count：37 Percentile：75.42(Thermodynamics)Improvement of thermal conductivity of phase change medium would be one of the effective techniques to reduce phase change time in latent heat storage technology. Thermal conductivity would be improved by saturating phase change materials (PCM) in porous metals. Efficiency of effective thermal conductivity on melting time is studied by analyzing melting characteristics of a heat storage circular capsule where porous metal saturated by PCM is inserted. Results show that considerable reduction in melting time was obtained, especially for low conductivity PCMs and for high heat transfer coefficient. Trial estimation of optimum porosity was presented under the conditions of keeping high latent heat capacity and high reduction rate of melting time. Optimum porosity decreases with increase in heat transfer coefficient.
Fumizawa, Motoo; Tanaka, Gaku*; Zhao, H.*; Hishida, Makoto*; Shiina, Yasuaki
Nihon Genshiryoku Gakkai Wabun Rombunshi, 3(4), p.313 - 322, 2004/12
This paper deals with a computer simulation of a helium-air counter flow in a rectangular channel. The inclination angle is varied from 0
(horizontal) to 90(vertical). Velocity profiles and concentration profiles are calculated with a computer program VSOP sub-module. Following main features of the counter flow are discussed. (1) Time required to establish a quasi-steady state counter flow. (2) The relationship between the inclination angle and the flow patterns of the counter flow (3) The developing process of velocity profiles and concentration profiles (4) The relationship between the inclination angle of the channel and the velocity profiles of upwards flow and the downwards flow (5) The relationship between the concentration profile and the inclination angle (6) The relationship between the net in-flow rate and the inclination angle We compared the computed velocity profile and the net in-flow rate with experimental data. A good agreement is obtained between the calculation and the experiment.
Shiina, Yasuaki; Takizuka, Takakazu; Kasahara, Seiji
Nihon Genshiryoku Gakkai-Shi, 46(12), p.862 - 863, 2004/12
no abstracts in English
Inagaki, Terumi*; Hatori, Masakazu*; Suzuki, Tomohiro*; Shiina, Yasuaki
Proceedings of International Conference on Advanced Optical Diagnostics in Fluids, Solids and Combustion (VSJ-SPIE '04) (CD-ROM), 9 Pages, 2004/12
no abstracts in English
Inagaki, Terumi*; Kaneko, Toshinobu*; Hatori, Masakazu*; Shiina, Yasuaki
Nihon Kikai Gakkai Rombunshu, B, 70(699), p.279 - 286, 2004/11
no abstracts in English
