Local Flow Measurements of Vertical Upward Bubbly Flow in an Annulus
(2003) Local Flow Measurements of Vertical Upward Bubbly Flow in an Annulus . International Journal of Heat and Mass Transfer 46(8):pp. 1479-1496.
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Abstract
Local measurements of flow parameters were performed for vertical upward bubbly flows in an 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. Double-sensor conductivity probe was used for measuring void fraction, interfacial area concentration, and interfacial velocity, and Laser Doppler anemometer was utilized for measuring liquid velocity and turbulence intensity. A total of 20 data sets for void fraction, interfacial area concentration, and interfacial velocity were acquired 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. A total of 8 data sets for liquid velocity and turbulence intensity were acquired consisting of five void fractions, about 0.050, and 0.10, and four superficial liquid velocities, 0.272, 0.516, 1.03, and 2.08 m/s. The constitutive equations for distribution parameter and drift velocity in the drift-flux model, and the semi-theoretical correlation for Sauter mean diameter namely interfacial area concentration, which were proposed previously, were validated by local flow parameters obtained in the experiment using the annulus.
| Item Type: | Journal Article |
|---|---|
| Status: | Published |
| Keywords: | Void fraction; Interfacial area concentration; Bubble size; Liquid velocity; Turbulence intensity; Double-sensor conductivity probe; Laser Doppler anemometer; Drift-flux model; Gas–liquid bubbly flow; Multi-phase flow; Annulus |
| Subjects: | 290000 Engineering and Technology > 290500 Mechanical and Industrial Engineering > 290501 Mechanical Engineering 240000 Physical Sciences > 240500 Classical Physics > 240502 Fluid Physics 290000 Engineering and Technology > 291800 Interdisciplinary Engineering > 291802 Heat and Mass Transfer Operations |
| ID Code: | 10420 |
| Deposited By: | Situ, Rong |
| Deposited On: | 25 October 2007 |
| Alternative Locations: | http://dx.doi.org/10.1016/S0017-9310(02)00421-0 |
| Copyright Owner: | Copyright 2003 Elsevier |
| Copyright Statement: | Reproduced in accordance with the copyright policy of the publisher |