Wave pattern of a ship. An aerial photograph from directly above shows, away from the breaking wave from the bow and its turbulent wake, the asymptotic pattern deduced by Kelvin in 1887. The waves are confined to an angle of 19 1/2 degrees on either side of the path of the ship, in agreement with the theory. (Newman 1970) Ref.: An Album of Fluid Motion by M. Van Dyke

September 30, 2011

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