Measurements of the droplet behavior near the wall in a vertical rectangular duct were conducted by a phase Doppler particle analyzer (PDPA). The test Reynolds number and drop size range is from 18,500 to 89,300 and from 5 μm to 110 μm, respectively. Results show that the negative slip-velocity of the drops near the free-stream region normally results in the reversed slip-velocity phenomenon in the boundary layer region. No negative slip-velocity of all drops are discovered for Reynolds number less than 38,300. This indicates no reversed slip-velocity phenomenon for the test drop size range under low Reynolds number conditions. However, when the Reynolds number is over 38,300, the free-stream slip-velocity of the bigger drops becomes negative. It is found that the negative slip-velocity and, hence, the reversed slip-velocity phenomenon may take place for drop size larger than 52 μm to 90 μm depending on the flow Reynolds number.
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June 1994
Research Papers
Droplet Dynamics Near the Wall in a Vertical Rectangular Duct
M. R. Wang,
M. R. Wang
Institute of Aeronautics and Astronautics, National Cheng Kung University, Tainan, Taiwan, 70101
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D. Y. Huang,
D. Y. Huang
Institute of Aeronautics and Astronautics, National Cheng Kung University, Tainan, Taiwan, 70101
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Y. C. Liu
Y. C. Liu
Institute of Aeronautics and Astronautics, National Cheng Kung University, Tainan, Taiwan, 70101
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M. R. Wang
Institute of Aeronautics and Astronautics, National Cheng Kung University, Tainan, Taiwan, 70101
D. Y. Huang
Institute of Aeronautics and Astronautics, National Cheng Kung University, Tainan, Taiwan, 70101
Y. C. Liu
Institute of Aeronautics and Astronautics, National Cheng Kung University, Tainan, Taiwan, 70101
J. Fluids Eng. Jun 1994, 116(2): 349-353 (5 pages)
Published Online: June 1, 1994
Article history
Received:
October 22, 1992
Revised:
May 7, 1993
Online:
May 23, 2008
Citation
Wang, M. R., Huang, D. Y., and Liu, Y. C. (June 1, 1994). "Droplet Dynamics Near the Wall in a Vertical Rectangular Duct." ASME. J. Fluids Eng. June 1994; 116(2): 349–353. https://doi.org/10.1115/1.2910279
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