Development of Bubble Size Correlation for Adiabatic Forced Convective Bubbly Flow in Low Pressure Condition Using CFD Code

In a multidimensional two-phase flow analysis, bubble size significantly affects interfacial transfer terms such as mass, momentum, and energy. With regard to bubbly flow, the application of a simple correlation-type bubble size model presents certain advantages, including short calculation times an...

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Bibliographic Details
Published in:Applied sciences 2020-08, Vol.10 (16), p.5443
Main Authors: Bak, Jinyeong, Kim, Huiyung, Jeong, Jae Jun, Euh, Dongjin, Yun, Byongjo
Format: Article
Language:English
Subjects:
Adiabatic
Aerodynamics
bubble size model
Bubbles
bubbly flow
CFD simulation
Computational fluid dynamics
Computer applications
Correlation analysis
Dimensional analysis
Energy dissipation
Experiments
Fluid dynamics
Hydrodynamics
interfacial transfer term
Low pressure
Multiphase flow
number density transport equation
Researchers
Transport equations
Turbulence models
Two phase flow
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Summary:In a multidimensional two-phase flow analysis, bubble size significantly affects interfacial transfer terms such as mass, momentum, and energy. With regard to bubbly flow, the application of a simple correlation-type bubble size model presents certain advantages, including short calculation times and ease of usage. In this study, we propose a semi-theoretical correlation developed from a steady state bubble number density transport equation for predicting the distribution of local bubble size using a computational fluid dynamics (CFD) code. The coefficients of the new correlation were determined using the local bubble parameters obtained on the basis of three existing vertical air-water experiments. Finally, these were implemented in commercial CFD code and evaluated against experimental data, which showed that the proposed correlation exhibits good prediction capability for forced convective air-water bubbly flows under low pressure conditions.
ISSN:2076-3417
2076-3417
DOI:10.3390/app10165443