Phase-Detection Probe Measurements in High-Velocity Free-Surface Flows including a Discussion of Key Sampling Parameters

Felder, Stefan and Chanson, Hubert (2015) Phase-Detection Probe Measurements in High-Velocity Free-Surface Flows including a Discussion of Key Sampling Parameters. Experimental Thermal and Fluid Science, 81 66-78. doi:10.1016/j.expthermflusci.2014.10.009


Author Felder, Stefan
Chanson, Hubert
Title Phase-Detection Probe Measurements in High-Velocity Free-Surface Flows including a Discussion of Key Sampling Parameters
Journal name Experimental Thermal and Fluid Science   Check publisher's open access policy
ISSN 0894-1777
1879-2286
Publication date 2015-01-01
Year available 2014
Sub-type Article (original research)
DOI 10.1016/j.expthermflusci.2014.10.009
Volume 81
Start page 66
End page 78
Total pages 13
Place of publication Philadelphia, PA United States
Publisher Elsevier Inc.
Language eng
Formatted abstract
Air–water high-velocity flows are characterised by strong interactions of air bubbles and water droplets. The void fraction ranges from a few percent in bubbly flows to up to 100% at the free-surface and a reliable measurement instrumentation is the phase-detection intrusive probe. Herein new experiments were conducted on a stepped spillway (θ = 26.6°) in transition and skimming flow sub-regimes yielding new insights into the turbulent air–water flow properties including the turbulence intensities and integral turbulent time and length scales. The integral turbulent scales showed self-similarity independently of the flow regime. A sensitivity analysis was conducted on the phase-detection probe signals to investigate the optimum sampling duration and frequency as well as the data analysis parameters threshold, sub-sampling duration, histogram bin sizes and cut-off effects. The results provide recommendations in terms of optimum sampling and processing parameters for high-velocity air–water flows.
Keyword Phase Detection Probe
High Velocity Free Surface Flows
Key Sampling Parameters
Conductivity probes
Signal processing
Stepped spillway
Air water flow properties
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online: 28 October 2014.

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
Official 2015 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 11 times in Thomson Reuters Web of Science Article | Citations
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Created: Tue, 11 Nov 2014, 19:09:48 EST by Hubert Chanson on behalf of School of Civil Engineering