Two-group drift-flux model for upward cap-bubbly two-phase flows in large square channels

孫 昊旻; 日引 俊*

International Journal of Heat and Mass Transfer, 237, p.126445_1 - 126445_14, 2025/02

https://doi.org/10.1016/j.ijheatmasstransfer.2024.126445

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.