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Keywords: Void fraction
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Proceedings Papers

Proc. ASME. AJKFluids2019, Volume 5: Multiphase Flow, V005T05A033, July 28–August 1, 2019
Paper No: AJKFluids2019-5256
... using the air lubrication method, in this study, the frictional drag reduction effect was experimentally investigated for gas-liquid two phase flow considering the influence of inclination and curved surface of the ship bottom. Measurement of local shear stress and measurement of void fraction...
Proceedings Papers

Proc. ASME. AJKFluids2019, Volume 5: Multiphase Flow, V005T05A028, July 28–August 1, 2019
Paper No: AJKFluids2019-4614
...Abstract Abstract Void fraction measuring techniques are reviewed with emphasis on applications to multiphase flow. The presentation is divided into two main sections; intrusive where the probe penetrates into the flow field, and non-intrusive where the detection is done remotely. The latter...
Proceedings Papers

Proc. ASME. FEDSM2013, Volume 1C, Symposia: Gas-Liquid Two-Phase Flows; Industrial and Environmental Applications of Fluid Mechanics; Issues and Perspectives in Automotive Flows; Liquid-Solids Flows; Multiscale Methods for Multiphase Flow; Noninvasive Measurements in Single and Multiphase Flows; Numerical Methods for Multiphase Flow; Transport Phenomena in Energy Conversion From Clean and Sustainable Resources; Transport Phenomena in Materials Processing and Manufacturing Processes; Transport Phenomena in Mixing; Turbulent Flows: Issues and Perspectives, V01CT17A005, July 7–11, 2013
Paper No: FEDSM2013-16117
..., is used to determine the void fraction within the cross-section of the pipe. Physical flow parameters were extracted based on processed raw measured data obtained by the sensors using signal processing techniques. In this work, the principle of wire mesh sensors and the methodology of flow parameter...
Proceedings Papers

Proc. ASME. FEDSM2012, Volume 2: Fora, 89-97, July 8–12, 2012
Paper No: FEDSM2012-72174
.... The combination of these non-intrusive techniques allowed for the development of a solid volume fraction correlation. The experimental results show new void fraction regimes of multiple interacting jets. Jet systems combined to promote gas solid mixing and decrease particle dead zones within the bed...
Proceedings Papers

Proc. ASME. FEDSM2008, Volume 2: Fora, 433-439, August 10–14, 2008
Paper No: FEDSM2008-55334
... phenomenon compared to single-phase flow. Still there is no effective technique to identify the two-phase, two- component flow regimes void fraction and it is even difficult to capture the accurate flow structures in the smaller conduits in turbulent flow cases. Lack of solid and comprehensive theories...
Proceedings Papers

Proc. ASME. FEDSM2008, Volume 1: Symposia, Parts A and B, 699-706, August 10–14, 2008
Paper No: FEDSM2008-55330
... is ejected out of the nozzle. It would be valuable to investigate under which two-phase fluid conditions this pulsation aggravates. It would also be beneficial to examine the detailed spray map with changing air-to-liquid ratio ( ALR ) by mass and void fraction ( α ). The average void fraction in the feeding...
Proceedings Papers

Proc. ASME. FEDSM2007, Volume 1: Symposia, Parts A and B, 479-485, July 30–August 2, 2007
Paper No: FEDSM2007-37101
... and void fraction were investigated in these pipes. In the hydrophobic pipe, an inverted-churn flow regime was observed in a region where the churn flow regime was observed in the acrylic pipe, while a droplet flow regime was observed in the region where an annular flow regime was observed in the acrylic...
Proceedings Papers

Proc. ASME. FEDSM2003, Volume 1: Fora, Parts A, B, C, and D, 1421-1428, July 6–10, 2003
Paper No: FEDSM2003-45372
.... The experimental data of void fraction and two-phase frictional pressure drop were compared with the respective correlations which were previously proposed by the other researchers. Finally, we proposed new correlations of two-phase frictional pressure drop in which the effect of surface tension and the aspect...
Proceedings Papers

Proc. ASME. FEDSM2003, Volume 2: Symposia, Parts A, B, and C, 1385-1391, July 6–10, 2003
Paper No: FEDSM2003-45008
... information such as the equivalent void fraction and the cavity boundary is obtained by using binary process for luminosity intensity. From both images of seeding particle and bubble, velocity information is obtained individually in regard to the inner or the outer area of the cavity by using cross...
Proceedings Papers

Proc. ASME. FEDSM2005, Volume 1: Symposia, Parts A and B, 1137-1146, June 19–23, 2005
Paper No: FEDSM2005-77055
... recovery are derived, which hold asymptotically for low gas to liquid mass fraction. These formulae provide simple means for calculating power recovery with gas evolution, given a certain vapor void fraction. The key element in the entire approach is to attribute the extra power recovery due to gas...
Proceedings Papers

Proc. ASME. FEDSM2006, Volume 1: Symposia, Parts A and B, 1579-1583, July 17–20, 2006
Paper No: FEDSM2006-98409
... that the small microbubbles generated by electrolysis can achieve the same drag reduction as the injected air bubbles at much lower void fraction. The distribution of microbubble was examined using the microscope photography. The peak of local void fraction was found to be very close to the wall, while...