Wave Structure and Velocity Profiles in Downwards Gas-Liquid Annular Flow
File(s)Zadrazil_etal_ICMF12.pdf (870.15 KB)
Accepted version
Author(s)
Zadrazil, I
Markides, CN
Hewitt, GF
Matar, OK
Type
Conference Paper
Abstract
The downwards co-current gas-liquid annular flows inside a vertically oriented pipe have been experimentally investigated.
The measurements and characterisation were performed using advanced optical non-intrusive laser-based techniques, namely
Laser Induced Fluorescence, and Particle Image/Tracking Velocimetry. The investigated conditions were in the range of ReL =
306 – 1,532 and ReG = 0 – 84,600. Temporal film thickness time traces were constructed using the Laser Induced Fluorescence
images. Based on these, the wave frequency was evaluated using direct wave counting approach and power spectral density
analysis. Additionally, qualitative PIV observations revealed the presence of recirculation zones within a wave front of
disturbance waves.
The measurements and characterisation were performed using advanced optical non-intrusive laser-based techniques, namely
Laser Induced Fluorescence, and Particle Image/Tracking Velocimetry. The investigated conditions were in the range of ReL =
306 – 1,532 and ReG = 0 – 84,600. Temporal film thickness time traces were constructed using the Laser Induced Fluorescence
images. Based on these, the wave frequency was evaluated using direct wave counting approach and power spectral density
analysis. Additionally, qualitative PIV observations revealed the presence of recirculation zones within a wave front of
disturbance waves.
Date Issued
2013-05-26
Date Acceptance
2013-05-26
Copyright Statement
© 2013 The Authors
Source
8th International Conference on Multiphase Flow
Start Date
2013-05-26
Finish Date
2013-05-31
Coverage Spatial
Jeju, South Korea