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Full-Text Articles in Physical Sciences and Mathematics

The Freak Wave Mystery ??A New Hypothesis For Its Occurrence, Nai-Kuang Liang Jun 2007

The Freak Wave Mystery ??A New Hypothesis For Its Occurrence, Nai-Kuang Liang

Journal of Marine Science and Technology

Freak waves are known as a maritime myth, which have damaged large cargo and cruise ships. So far freak waves are explained by strong current focusing and nonlinear wave interaction. The latter may results in a single large wave. However this can still not explain the disappearance of the cargo ship Muenchen in December, 1978. This paper proposes a new hypothesis which stems from the wave/ swell energy flux accumulation due to the moving wind system. Nature might play the game by controlling the moving speed to approach the wave/swell group velocity.


Generation Of Internal Solitary Wave By Gravity Collapse, Chen-Yuan Chen, John Rong-Chung Hsu, Cheng-Wu Chen, Hsin-Hsun Chen, Ching-Feng Kuo, Min-Hung Cheng Feb 2007

Generation Of Internal Solitary Wave By Gravity Collapse, Chen-Yuan Chen, John Rong-Chung Hsu, Cheng-Wu Chen, Hsin-Hsun Chen, Ching-Feng Kuo, Min-Hung Cheng

Journal of Marine Science and Technology

Laboratory experiments were conducted to investigate the generation of an internal solitary wave (ISW) in a two-layer free surface fluid system in wave flume (12 m × 0.5 m × 0.7 m), which included wave channel and compartment. There is filled with stratified twolayer fluid system in the channel and small compartment, respectively. These two regions in the wave flume are separated by a movable vertical gate at one end of the flume for generating the ISW (internal solitary wave). An ISW generation is thus caused by gravity collapse upon raising the vertical gate. Given positive potential energies, an elevation-type …


Wave Propagation At The Interface Of A Two-Layer Fluid System In The Laboratory, Chen-Yuan Chen, John Rong-Chung Hsu, Cheng-Wu Chen, Ching-Feng Kuo, Hsin-Hsun Chen, Min-Hung Cheng Feb 2007

Wave Propagation At The Interface Of A Two-Layer Fluid System In The Laboratory, Chen-Yuan Chen, John Rong-Chung Hsu, Cheng-Wu Chen, Ching-Feng Kuo, Hsin-Hsun Chen, Min-Hung Cheng

Journal of Marine Science and Technology

A series of laboratory experiments on internal solitary wave (ISW) had been conducted in a two-layer fluid system. Internal solitary waves were generated in laboratory which was controlled by several variables, including different layer thickness ratios H1/H2, interface differences ηo, and the density ratios ρ1/ρ2. The wave flume used in this experiment was 12 meter long with a cross-section 0.5 m wide by 0.7m in height. Five ultrasonic probes placed at equidistance recorded the interface fluctuations, and one density probe measured the change of density across the interface. Data collection and processing were carried out via control software. This paper …