Journal of Flow Visualization and Image Processing

ISSN for PRINT: 1065-3090

For Online Access

Best Paper Award Selection - Editorial Board Site

2006, Volume13

Issue 4

118 pages

DOI: 10.1615/JFlowVisImageProc.v13.i4

Issue price - $154.00

Ing Youn Chen
Mechanical Engineering Department, National Yunlin University of Science and Technology, Yunlin, Taiwan 640

Chia Wei Tsai
National Yunlin University of Science and Technology, Yunlin, 640, Taiwan

Robert Hu
Industrial Technology Research Institute Hsinchu, 310, Taiwan

Chi-chuan Wang
Industrial Technology Research Institute, Energy Resources Lab. Bldg. 64, Section 4, Chung Hsing Rd., Chutung 310, Hsinchu, Taiwan, R.O.C 31015

A two-phase flow across a vertically split U-type junction inside two 6.7 mm smooth tubes having curvature ratios of 3 and 7 was visually observed. The range of mass flux is 100−700 kg/m²·s. The gas mass flux in the upper and lower tubes is generally increased with the rise of gas quality while the distribution of liquid mass flux reveals a minimum and a maximum phenomenon. The gas mass flux in the lower tube is continuously increased with gas quality and is generally lower than that in the upper tube. However, its value may exceed that of its counterpart at the upper tube when semi-annular or annular flow takes place (x > 0.1). The surprising results can be attributed to the negligible influence of buoyancy, the airflow dragged by the gravity-induced liquid flow in the lower tube, and the liquid obstacle in the upper leg hindering the airflow path.

DOI: 10.1615/JFlowVisImageProc.v13.i4.20 Download article, 323-342 pages

Article price - $35.00

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