The Wave Energy Concentration at the Agulhas Current off South Africa |
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| Authors: | Lavrenov I V |
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| Institution: | (1) Arctic and Antarctic Institute, Av. Bering 38, 199397 St. Petersburg, Russia. |
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| Abstract: | The case of a freak wave collision with the ship in the Agulhas current is described. The explanation of the appearance of the freak wave as a result of wind-wave transformation in the Agulhas current is given. Swell is captured and intensified by the counter-current and is located in the neighbourhood of the maximum value of the current velocity, as a result of which there is a great concentration of wave-energy density. The superposition of wind and sea with swell transformed by the current promotes the formation of the freak waves. Using a simple mathematical analysis, an optimal ship track is proposed which could reduce the risk of collision with a freak wave. |
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| Keywords: | freak waves Agulhas current ship collision wave energy modelling of wave transformation on current |
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