TY - GEN
T1 - Local and area-averaged flow structure of air-water two-phase flow in a vertical annulus
AU - Ozar, Basar
AU - Jeong, Jae Jun
AU - Dixit, Abhinav
AU - Juliá, Jose Enrique
AU - Hibiki, Takashi
AU - Ishii, Mamoru
N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].
PY - 2008
Y1 - 2008
N2 - The flow structure of gas-liquid two-phase flow has been investigated in a vertical annulus channel. The annulus consisted of a geometry where the inner diameter was 19.1 mm and the outer diameter was 38.1 mm. The total height of the test section was 4.37 m. Experiments were conducted for nineteen inlet flow conditions. These (low conditions covered bubbly, cap-slug, and ehurn-turbulent flows. The local flow parameters, such as void fraction, interfacial area concentration, and bubble interface velocity, were measured at nine radial positions within the gap of the annulus at z/Dh= 230 of the test section. Radial distributions of these parameters were interpreted in terms of turbulent velocity profile, lift and wall forces. In addition, the local measurements were used to calculate distribution parameter, C0 in drift-flux model, and area averaged interfaeial area concentration, Ishii's (1977) model was modified and a new correlation of C0 was proposed based on the experimentally obtained C0 values. The area-averaged interfaeial area concentration (IAC) values were compared with the most widely used models (Ishii and Mishima, 1980; Spore et al., 1983; Hibiki and Ishii, 2002). The advantages and drawbacks of these models were highlighted. Copyright © 2008 by ASME.
AB - The flow structure of gas-liquid two-phase flow has been investigated in a vertical annulus channel. The annulus consisted of a geometry where the inner diameter was 19.1 mm and the outer diameter was 38.1 mm. The total height of the test section was 4.37 m. Experiments were conducted for nineteen inlet flow conditions. These (low conditions covered bubbly, cap-slug, and ehurn-turbulent flows. The local flow parameters, such as void fraction, interfacial area concentration, and bubble interface velocity, were measured at nine radial positions within the gap of the annulus at z/Dh= 230 of the test section. Radial distributions of these parameters were interpreted in terms of turbulent velocity profile, lift and wall forces. In addition, the local measurements were used to calculate distribution parameter, C0 in drift-flux model, and area averaged interfaeial area concentration, Ishii's (1977) model was modified and a new correlation of C0 was proposed based on the experimentally obtained C0 values. The area-averaged interfaeial area concentration (IAC) values were compared with the most widely used models (Ishii and Mishima, 1980; Spore et al., 1983; Hibiki and Ishii, 2002). The advantages and drawbacks of these models were highlighted. Copyright © 2008 by ASME.
UR - https://www.scopus.com/pages/publications/70349116507
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-70349116507&origin=recordpage
U2 - 10.1115/ICONE16-48067
DO - 10.1115/ICONE16-48067
M3 - RGC 32 - Refereed conference paper (with host publication)
SN - 0791848159
SN - 9780791848159
VL - 3
T3 - International Conference on Nuclear Engineering, Proceedings, ICONE
SP - 37
EP - 47
BT - 2008 Proceedings of the 16th International Conference on Nuclear Engineering, ICONE16
T2 - 16th International Conference on Nuclear Engineering, ICONE16 2008
Y2 - 11 May 2008 through 15 May 2008
ER -