Velocity bias in intrusive gas-liquid flow measurements
File(s)
Published version
OA Location
Author(s)
Hohermuth, B
Kramer, M
Felder, S
Valero, D
Type
Journal Article
Abstract
Gas–liquid flows occur in many natural environments such as breaking waves, river rapids and human-made systems, including nuclear reactors and water treatment or conveyance infrastructure. Such two-phase flows are commonly investigated using phase-detection intrusive probes, yielding velocities that are considered to be directly representative of bubble velocities. Using different state-of-the-art instruments and analysis algorithms, we show that bubble–probe interactions lead to an underestimation of the real bubble velocity due to surface tension. To overcome this velocity bias, a correction method is formulated based on a force balance on the bubble. The proposed methodology allows to assess the bubble–probe interaction bias for various types of gas-liquid flows and to recover the undisturbed real bubble velocity. We show that the velocity bias is strong in laboratory scale investigations and therefore may affect the extrapolation of results to full scale. The correction method increases the accuracy of bubble velocity estimations, thereby enabling a deeper understanding of fundamental gas-liquid flow processes.
Date Issued
2021-07-05
Date Acceptance
2021-06-04
Citation
Nature Communications, 2021, 12 (1)
ISSN
2041-1723
Publisher
Nature Portfolio
Journal / Book Title
Nature Communications
Volume
12
Issue
1
Copyright Statement
© The Author(s) 2021. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
License URL
Identifier
https://www.ncbi.nlm.nih.gov/pubmed/34226538
PII: 10.1038/s41467-021-24231-4
Subjects
2-PHASE FLOW
AREA
FIELD
LDA MEASUREMENT
Multidisciplinary Sciences
OPEN-CHANNEL FLOW
OPTICAL PROBES
PARAMETERS
PIPE
Science & Technology
Science & Technology - Other Topics
TURBULENCE
WATER
Publication Status
Published
Coverage Spatial
England
Article Number
4123
Date Publish Online
2021-07-05