Abstract
| Original language | English |
|---|---|
| Article number | 7837 |
| Journal | Geophysical Research Abstracts |
| Volume | 19 |
| Number of pages | 1 |
| ISSN | 1607-7962 |
| Publication status | Published - 2017 |
| Event | EGU General Assembly 2017: European GEosciences Union 2017 - Vienna, Austria Duration: 24 Apr 2017 → 28 Apr 2017 http://www.egu2017.eu |
Conference
| Conference | EGU General Assembly 2017 |
|---|---|
| Country | Austria |
| City | Vienna |
| Period | 24/04/2017 → 28/04/2017 |
| Internet address |
Cite this
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PIV measurements of velocities and accelerations under breaking waves on a slope. / Vested, Malene Hovgaard; Carstensen, Stefan; Christensen, Erik Damgaard.
In: Geophysical Research Abstracts, Vol. 19, 7837, 2017.Research output: Contribution to journal › Conference abstract in journal › Research › peer-review
TY - ABST
T1 - PIV measurements of velocities and accelerations under breaking waves on a slope
AU - Vested, Malene Hovgaard
AU - Carstensen, Stefan
AU - Christensen, Erik Damgaard
PY - 2017
Y1 - 2017
N2 - Understanding the physics of breaking waves is an ongoing research topic, not only due to human curiosity, but also due to the influence breaking waves have on offshore structures. In recent years, the development in experimental methods has facilitated a new insight into the physics of breaking waves. In this study, we have investigated the wave kinematics under steep and breaking waves on a laboratory beach with a slope of 1/25. The velocity field was measured by use of Particle Image Velocimetry (PIV) at a sample rate of 96Hz. The high sample rate allowed for the accelerations to be determined directly from the sampled velocities. It was found that both velocities and accelerations differ from the ones predicted from common wave theories such as streamfunction theory. This was especially evident at the top part of the wave close to the surface. This was not surprising, since the breaking event is a highly non-linear process. The results presented here may facilitate computations of the impact force on offshore structures and furthermore be used for validation of CFD models while altogether shedding light on the mechanisms behind breaking waves.
AB - Understanding the physics of breaking waves is an ongoing research topic, not only due to human curiosity, but also due to the influence breaking waves have on offshore structures. In recent years, the development in experimental methods has facilitated a new insight into the physics of breaking waves. In this study, we have investigated the wave kinematics under steep and breaking waves on a laboratory beach with a slope of 1/25. The velocity field was measured by use of Particle Image Velocimetry (PIV) at a sample rate of 96Hz. The high sample rate allowed for the accelerations to be determined directly from the sampled velocities. It was found that both velocities and accelerations differ from the ones predicted from common wave theories such as streamfunction theory. This was especially evident at the top part of the wave close to the surface. This was not surprising, since the breaking event is a highly non-linear process. The results presented here may facilitate computations of the impact force on offshore structures and furthermore be used for validation of CFD models while altogether shedding light on the mechanisms behind breaking waves.
M3 - Conference abstract in journal
VL - 19
JO - Geophysical Research Abstracts
JF - Geophysical Research Abstracts
SN - 1607-7962
M1 - 7837
ER -