A wind-wave tank study of the azimuthal response of a Ka-band scatterometer

1991 ◽  
Vol 29 (1) ◽  
pp. 143-148 ◽  
Author(s):  
J.-P. Giovanangeli ◽  
L.F. Bliven ◽  
O. Le Calve
Keyword(s):  
Wind Wave ◽  
Wave Tank ◽  
Ka Band

Ka-band radar scattering in a wind-wave tank

2014 ◽  
Author(s):  
C-A. Guerin ◽  
O. Boisot ◽  
S. Pioch ◽  
A. Bringer ◽  
G. Caulliez ◽  
...  
Keyword(s):  
Wind Wave ◽  
Wave Tank ◽  
Ka Band ◽  
Radar Scattering

scholarly journals Ka-band backscattering from water surface at small incidence: A wind-wave tank study

2015 ◽  
Vol 120 (5) ◽  
pp. 3261-3285 ◽  
Author(s):  
Olivier Boisot ◽  
Sébastien Pioch ◽  
Christophe Fatras ◽  
Guillemette Caulliez ◽  
Alexandra Bringer ◽  
...  
Keyword(s):  
Water Surface ◽  
Wind Wave ◽  
Wave Tank ◽  
Ka Band ◽  
Small Incidence

Image sequence analysis of water surface waves in a hydraulic wind wave tank

1999 ◽  
Author(s):  
Christian M. Senet ◽  
Nicole Braun ◽  
Philipp A. Lange ◽  
Joerg Seemann ◽  
Heiko Dankert ◽  
...  
Keyword(s):  
Sequence Analysis ◽  
Surface Waves ◽  
Water Surface ◽  
Wind Wave ◽  
Image Sequence ◽  
Image Sequence Analysis ◽  
Wave Tank

scholarly journals Loop-Type Wave-Generation Method for Generating Wind Waves under Long-Fetch Conditions

2017 ◽  
Vol 34 (10) ◽  
pp. 2129-2139 ◽  
Author(s):  
Naohisa Takagaki ◽  
Satoru Komori ◽  
Mizuki Ishida ◽  
Koji Iwano ◽  
Ryoichi Kurose ◽  
...  
Keyword(s):  
Wind Wave ◽  
Wind Waves ◽  
Peak Frequency ◽  
Wave Generation ◽  
New Wave ◽  
Wave Tank ◽  
Irregular Wave ◽  
Wind Speeds ◽  
Type Wave ◽  
Wave Generator

AbstractIt is important to develop a wave-generation method for extending the fetch in laboratory experiments, because previous laboratory studies were limited to the fetch shorter than several dozen meters. A new wave-generation method is proposed for generating wind waves under long-fetch conditions in a wind-wave tank, using a programmable irregular-wave generator. This new method is named a loop-type wave-generation method (LTWGM), because the waves with wave characteristics close to the wind waves measured at the end of the tank are reproduced at the entrance of the tank by the programmable irregular-wave generator and the mechanical wave generation is repeated at the entrance in order to increase the fetch. Water-level fluctuation is measured at both normal and extremely high wind speeds using resistance-type wave gauges. The results show that, at both wind speeds, LTWGM can produce wind waves with long fetches exceeding the length of the wind-wave tank. It is observed that the spectrum of wind waves with a long fetch reproduced by a wave generator is consistent with that of pure wind-driven waves without a wave generator. The fetch laws between the significant wave height and the peak frequency are also confirmed for the wind waves under long-fetch conditions. This implies that the ideal wind waves under long-fetch conditions can be reproduced using LTWGM with the programmable irregular-wave generator.

Turbulent current measurements in a wind-wave tank

1984 ◽  
Vol 89 (C1) ◽  
pp. 627 ◽  
Author(s):  
Jung-Tai Lin ◽  
Mohamed Gad-el-Hak
Keyword(s):  
Wind Wave ◽  
Wave Tank

Development of Air Side Loop Method Applied Wind-wave Tank

2018 ◽  
Vol 2018 (0) ◽  
pp. GS2-4
Author(s):  
Shunsaku TAKAHATA ◽  
Naohisa TAKAGAKI ◽  
Naoya SUZUKI ◽  
Keita TAKANE ◽  
Yuhei SHIMIZU ◽  
...  
Keyword(s):  
Wind Wave ◽  
Wave Tank ◽  
Loop Method

scholarly journals Bound waves and Bragg scattering in a wind-wave tank

1999 ◽  
Vol 104 (C2) ◽  
pp. 3243-3263 ◽  
Author(s):  
William J. Plant ◽  
William C. Keller ◽  
Vahid Hesany ◽  
Tetsu Hara ◽  
Erik Bock ◽  
...  
Keyword(s):  
Wind Wave ◽  
Bragg Scattering ◽  
Wave Tank

scholarly journals Wind Wave Growth at Short Fetch

2008 ◽  
Vol 38 (7) ◽  
pp. 1597-1606 ◽  
Author(s):  
T. Lamont-Smith ◽  
T. Waseda
Keyword(s):  
Wind Speed ◽  
Wave Height ◽  
Significant Wave Height ◽  
Field Data ◽  
Wind Wave ◽  
Wind Waves ◽  
Retention Rates ◽  
Horizontal Distance ◽  
Wave Tank ◽  
Significant Wave

Abstract Wave wire data from the large wind wave tank of the Ocean Engineering Laboratory at the University of California, Santa Barbara, are analyzed, and comparisons are made with published data collected in four other wave tanks. The behavior of wind waves at various fetches (7–80 m) is very similar to the behavior observed in the other tanks. When the nondimensional frequency F* or nondimensional significant wave height H* is plotted against nondimensional fetch x*, a large scatter in the data points is found. Multivariate regression to the dimensional parameters shows that significant wave height Hsig is a function of U2x and frequency F is a function of U1.25x, where U is the wind speed and x is the horizontal distance, with the result that in general for wind waves at a particular fetch in a wave tank, approximately speaking, the wave frequency is inversely proportional to the square root of the wind speed and the wavelength is proportional to the wind speed. Similarly, the wave height is proportional to U1.5 and the orbital velocity is proportional to U. Comparison with field data indicates a transition from this fetch law to the conventional one [the Joint North Sea Wave Project (JONSWAP)] for longer fetch. Despite differences in the fetch relationship for the wave tank and the field data, the wave height and wave period satisfy Toba’s 3/2 power law. This law imposes a strong constraint on the evolution of wind wave energy and frequency; consequently, the energy and momentum retention rate are not independent. Both retention rates grow with wind speed and fetch at the short fetches present in the wave tank. The observed retention rates are completely different from those typically observed in the field, but the same constraint (Toba’s 3/2 law) holds true.

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