Interfacial area concentration in gas-liquid bubbly to churn-turbulent flow regime
Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
Author(s)
Detail(s)
Original language | English |
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Pages (from-to) | 168-179 |
Journal / Publication | International Journal of Heat and Fluid Flow |
Volume | 38 |
Publication status | Published - Dec 2012 |
Externally published | Yes |
Link(s)
Abstract
There are very few established correlations to predict the interfacial area concentration beyond the bubbly flow regime in cap-slug and churn-turbulent flow regimes. Present study shows a systematic approach to estimate the interfacial area concentration in bubbly, cap-slug and churn-turbulent flow regimes. Ishii and Mishima's (1980) formulation and the two group approach for categorizing bubbles (Group-1: spherical or distorted bubble, Group-2: cap bubble) are used to estimate the interfacial area concentration. The key parameters in this framework are the estimation of Group-1 bubble size and the amount of void in the liquid slug, which is a function of Group-1 void fraction. Hibiki and Ishii's (2002) correlation is utilized to predict the size of the Group-1 bubbles. A correlation is developed to estimate the Group-1 void fraction. The developed model for the estimation of interfacial area concentration is compared with the three existing datasets. These are data for air-water flow taken in annular geometry and round tube and also for air-NaOH solution taken in round tube. The estimation accuracies for these data sets are ±36.4%, ±26.5% and ±37.4%, respectively. These datasets cover a wide range of flow regimes and different physical properties. © 2012 Elsevier Inc.
Research Area(s)
- Bubble, Fluid mechanics, Hydrodynamics, Interfacial area, Multiphase flow, Void fraction
Bibliographic Note
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Citation Format(s)
Interfacial area concentration in gas-liquid bubbly to churn-turbulent flow regime. / Ozar, B.; Dixit, A.; Chen, S. W.; Hibiki, T.; Ishii, M.
In: International Journal of Heat and Fluid Flow, Vol. 38, 12.2012, p. 168-179.Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review