NDLI: Local Interfacial Structures in Horizontal Bubbly Flow with 90-Degree Bend

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Kim, Seungjin Park, Jung Han Kojasoy, Gunol Joseph, M. Kelly
Copyright Year	2006
Abstract	Present study investigates the geometric effects of flow obstruction on the distribution of local two-phase flow parameters and their transport characteristics in horizontal two-phase flow. The round glass tubes of 50.3mm in inner diameter are employed as test sections, along which a 90-degee elbow is located at L/D = 206.6 from the two-phase mixture inlet. In total, 15 different flow conditions are examined within the air-water bubbly flow regime. The detailed local two-phase flow parameters are acquired by the double-sensor conductivity probe at four different axial locations. The effect of elbow is found to be evident in both the distribution of local parameters and their development. The elbow clearly promotes bubble interactions resulting in significant changes in interfacial area concentration. It is also found that the elbow-effect propagates to be more significant further downstream (L/D = 250) than immediate downstream (L/D = 225) of the elbow. Furthermore, it is shown that the elbow induces significant oscillations in the flow in both vertical and horizontal directions of the tube cross-section. Characteristic geometric effects due to the existence of elbow are also shown clearly on the axial development of one-dimensional interfacial area concentration and void fraction.
Sponsorship	Nuclear Engineering Division
Starting Page	219
Ending Page	226
Page Count	8
File Format	PDF
ISBN	0791842436
DOI	10.1115/ICONE14-89221
e-ISBN	0791837831
Volume Number	Volume 2: Thermal Hydraulics
Conference Proceedings	14th International Conference on Nuclear Engineering
Language	English
Publisher Date	2006-07-17
Publisher Place	Miami, Florida, USA
Access Restriction	Subscribed
Subject Keyword	Water Electrical conductivity Glass Oscillations Flow (dynamics) Interface structure Bubbles Bubbly flow Two-phase flow Thermal conductivity Porosity Sensors Probes
Content Type	Text
Resource Type	Article

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