Interfacial area transport of vertical upward bubbly two-phase flow in an annulus

Hibiki, Takashi, Mi, Ye, Situ, Rong, and Ishii, Mamoru (2003) Interfacial area transport of vertical upward bubbly two-phase flow in an annulus. International Journal of Heat and Mass Transfer, 46 (25). pp. 4949-4962.

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Abstract

In relation to the development of the interfacial area transport equation in a subcooled boiling flow, the one-dimensional interfacial area transport equation was evaluated by the data taken in the hydrodynamic separate effect tests without phase change, or an adiabatic air–water bubbly flow in a vertical annulus. The annulus channel consisted of an inner rod with a diameter of 19.1 mm and an outer round tube with an inner diameter of 38.1 mm, and the hydraulic equivalent diameter was 19.1 mm. Twenty data sets consisting of five void fractions, about 0.050, 0.10, 0.15, 0.20, and 0.25, and four superficial liquid velocities, 0.272, 0.516, 1.03, and 2.08 m/s were used for the evaluation of the one-dimensional interfacial area transport equation. The one-dimensional interfacial area transport equation agreed with the data with an average relative deviation of ±8.96%. Sensitivity analysis was also performed to investigate the effect of the initial bubble size on the interfacial area transport. It was shown that the dominant mechanism of the interfacial area transport was strongly dependent on the initial bubble size.

Item ID: 21512
Item Type: Article (Refereed Research - C1)
Keywords: interfacial area transport; two-fluid model; interfacial area concentration; double-sensor conductivity probe; gas-liquid bubbly flow; multiphase flow
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ISSN: 1879-2189
Date Deposited: 27 Jun 2012 00:02
FoR Codes: 09 ENGINEERING > 0915 Interdisciplinary Engineering > 091504 Fluidisation and Fluid Mechanics @ 50%
09 ENGINEERING > 0915 Interdisciplinary Engineering > 091505 Heat and Mass Transfer Operations @ 50%
SEO Codes: 85 ENERGY > 8504 Energy Transformation > 850403 Nuclear Energy @ 50%
85 ENERGY > 8507 Energy Conservation and Efficiency > 850701 Commercial Energy Conservation and Efficiency @ 50%
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