Void fraction estimation using a simple combined wave gauge system under breaking waves
SCIE
SCOPUS
Cited 0 time in
WEB OF SCIENCE
Cited 1 time in
Scopus
-
Title
- Void fraction estimation using a simple combined wave gauge system under breaking waves
-
Author(s)
- Na, Byoungjoon; Son, Sangyoung
-
Alternative Author(s)
- 나병준
-
Publication Year
- 2021-12
-
Abstract
- In this study, a unique experimental technique that is capable of quantifying void fraction under two-phase air-water flows based on simple combined resistance and capacitance wave gauge system is described and the subsequent applications are discussed. The technique is validated under various surf-zone breaking waves of different wave periods and wave heights in the 2-dimensional wave flume. The difference in the measured surface elevations by capacitance and resistance wave gauges is positively linked to the depth of aeration and depth-averaged void fraction, that is validated by the corresponding images. The measured depth-averaged void fraction at the passage of the air cavity formed by the overturning jet after breaking showed a distinct pattern in regular and cnoidal waves which is attributed to different amount of droplets generated during the jet-curling process. Based on wavelet analysis, the peak frequency-wave continuously spreads its energy to its super-harmonic components due to shoaling while instantaneous spreads of wave energy to the higher harmonics are superposed due to breaking and subsequent jet-overturning. Considering void fraction, a sharper decay of wave energy within the intensely aerated region immediately after breaking is observed and the dissipated energy is reduced as the wave steepness increases following an exponential decay. © 2021 Elsevier Ltd
-
ISSN
- 0029-8018
-
URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/42091
-
DOI
- 10.1016/j.oceaneng.2021.110059
-
Bibliographic Citation
- Ocean Engineering, v.241, 2021
-
Publisher
- Elsevier Ltd
-
Keywords
- Breaking wave; Capacitance-type wave gauge; Energy dissipation; Resistance-type wave gauge; Void fraction
-
Type
- Article
-
Language
- English
-
Document Type
- Article
- Files in This Item:
-
There are no files associated with this item.
Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.