Interfacial Heat and Mass Transfer Are Prevalent in Industrial Processes. the Interfacial Transfer Rate Can Be Obtained by the Product of their Fluxes and Interfacial Area Concentration (IAC) Calculated by the Interfacial Area Transport Equation (IATE). Bubbles Show Different Behavior According to their Sizes. Hence, Bubbles Are Classified into Two Groups. Consequently, Two-Group IATE is Required Causing to Use of Two Gas Momentum Equations Leading to More Complexity. the Present Study Suggests a New Reliable Two-Group Drift-Flux Modeling to Reduce the Two Gas Momentum Equations to One Gas Mixture Momentum Equation for Gas-Liquid Flow in Large-Diameter Pipes. the Model is Developed based on the Drift-Flux Model Concept and Experimental Data. Group-One and Group-Two Distribution Parameters and Drift Velocities Are Validated through Experimental Data. the Results Show that the Proposed Two-Group Drift-Flux Model Can Support the Concept of Drift Velocity from the Bubbly to Beyond the Bubbly Flow and Consistency between the One-Group and Two-Group Drift-Flux Models. Moreover, Steam-Water Data Are Used to Validate the Applicability of the Model in Steam-Water Flows Condition. the Developed Two-Group Drift-Flux Model is Indispensable for Reducing the Two Gas Momentum Equations to One Gas Mixture Momentum Equation When Two-Group IATE is Implemented into Thermal-Hydraulic Codes to Improve the Prediction Accuracy of IAC.
H. Barati et al., "Two-Group Drift-Flux Model for Dispersed Gas-Liquid Flow in Large-Diameter Pipes," International Journal of Heat and Mass Transfer, vol. 218, article no. 124766, Elsevier, Jan 2024.
The definitive version is available at https://doi.org/10.1016/j.ijheatmasstransfer.2023.124766
Nuclear Engineering and Radiation Science
Keywords and Phrases
Drift-flux model; Interfacial transfer; Large channels; Steam-water flows; Void fraction
International Standard Serial Number (ISSN)
Article - Journal
© 2023 Elsevier, All rights reserved.
01 Jan 2024