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孫 昊旻; 日引 俊*
International Journal of Heat and Mass Transfer, 237, p.126445_1 - 126445_14, 2025/02
被引用回数：2 パーセンタイル：36.85(Thermodynamics)Various bubbles exist in two-phase flows. A practical approach is classifying the bubbles into two groups based on their drag coefficients. Two-group two-fluid model can potentially provide the most accurate analysis of two-phase flows. Two-group drift-flux model should be established as a constitutive equation to simplify the two-group two-fluid model for its practical use. The drift-flux model for large square channels has seldom been investigated, even though such channels exist in various engineering systems. This study developed the two-group drift-flux model for large square channels based on experimental databases.
孫 昊旻; 功刀 資彰*; 横峯 健彦*; Shen, X.*; 日引 俊*
International Journal of Heat and Mass Transfer, 211, p.124214_1 - 124214_17, 2023/09
被引用回数：4 パーセンタイル：37.98(Thermodynamics)An experiment for upward bubbly flows was conducted in a large square channel. The local void fraction, axial gas velocity, axial liquid velocity, interfacial area concentration, and Sauter mean diameter were measured at three axial locations. Based on the measurement data, the flow characteristics through flow development were investigated. The drift-flux parameters were directly determined from the local measurement data through their definitions. It was found that the distribution parameters and the void fractions could be fairly reproduced by the existing correlations for large circular pipes. Furthermore, the interfacial area concentrations could be predicted by existing correlations with reasonable accuracy.
伊藤 公孝; 伊藤 早苗*
Japanese Journal of Applied Physics, 21(4), p.L203 - L205, 1982/00
被引用回数：1 パーセンタイル：12.30(Physics, Applied)磁気流体的不安定性をラジオ波により安定化する方法について考察する。磁力線と垂直方向の電場を持つラジオ波をプラズマに伝播させ、ドリフト速度を増大させることによる安定化効果を調べた。動重力による安定化効果とあわせ、ラジオ波の周波数Wrfがイオンサイクロトロン周波数
より大きくとも小さくとも安定化効果があることがわかった。この効果は短波長の不安定性に対しより効果的である。
