The Effect of Bubble Size on the Radial Distribution of Void Fraction in Two-Phase Flow in a Circular Tube
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概要
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SIMMER-IV, a three-dimensional version of SIMMER-III, has been developed at JNC to study the safety of fast reactors mechanistically. SIMMER-IV was applied to the experimental analysis of bubbly flow to verify the models. The results of an experiment performed by Valukina et al. showed that the radial distribution of void fraction changes suddenly as the bubble size changes. In the present work, the analysis focuses on reproducing the change of the radial void distribution. The diffusion term, “lateral lift force,” and “wall force” were introduced in sequence into its momentum conservation equation. Naturally, the diffusion term improved the radial distribution of vertical velocity but did not explain the change of the radial void distribution in the experiment. Subsequent introduction of the lateral lift force increased the void fraction along the wall, but it did not change the radial void distribution as the bubble size changed. Finally, the wall force was introduced and, in accordance with the experimental results, the dependence of radial void distribution on the bubble size was proved. The behavior of a molten pool that is bubbly with steel steam plays an important role in the evaluation of LMFR severe accidents. This study is expected to improve the evaluation.
- 2001-09-25
著者
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MORITA Koji
Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University
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SHIRAKAWA Noriyuki
Power & Industrial Systems R&D Center, Toshiba Corporation
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Morita Koji
Department Of Applied Quantum Physics And Nuclear Engineering Kyushu University
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Shirakawa Noriyuki
Power & Industrial Systems Research & Development Center Toshiba Corporation
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Tobita Y
Japan Nuclear Cycle Dev. Inst. Ibaraki
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HORIE Hideki
Power & Industrial Systems Research & Development Center, Toshiba Corporation
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TOBITA Yoshiharu
O-arai Engineering Center, Japan Nuclear Cycle Development Institute
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KONDO Satoru
O-arai Engineering Center, Japan Nuclear Cycle Development Institute
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Tobita Yoshiharu
O-arai Engineering Center Japan Nuclear Cycle Development Institute
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Horie Hideki
Power & Industrial Systems Research & Development Center Toshiba Corporation
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Morita Koji
Institute Of Environmental Systems Faculty Of Engineering Kyushu University
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Kondo Satoru
O-arai Engineering Center Japan Nuclear Cycle Development Institute
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Morita Koji
Department Of Anesthesiology And Intensive Care Hamamatsu University School Of Medicine
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Morita Koji
Department Of Materials Science And Technology Graduate School Of Engineering Sciences Kyushu Univer
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Morita Koji
Department of Advanced Prosthodontics, Division of Cervico-Gnathostomatology, Programs for Applied Biomedicine, Hiroshima University Graduate School of Biomedical Sciences
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