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Summary

Description A bichromatic group of gravity waves on the surface of deep water. The number of waves for a group in space is different from the number of waves in for the same group in time, due to frequency dispersion: the group velocity is half the phase velocity, for the shown case. The upper (blue) line is a snapshot of the water surface at a certain moment in time. The lower (orange) line is a time trace of the surface elevation at a certain fixed horizontal position. For the shown case, there are 5¾ waves between two wave group nodes in space, while there a 11½ waves between two wave group nodes in time.
Date
Source Own work
Author Kraaiennest (talk)
Reference
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“Unsteady water wave modulations: fully nonlinear solutions and comparison with the nonlinear Schrödinger equation”, in Wave Motion, volume 29, 1999, DOI:10.1016/S0165-2125(98)00045-6, pages 341–361
 
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4 May 2008

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current14:16, 4 May 2008Thumbnail for version as of 14:16, 4 May 2008573 × 121 (42 KB)Kraaiennest{{Information |Description=A bichromatic group of gravity waves on the surface of deep water. The number of waves for a group in space is different from the number of waves in for the same group in time, due to frequency dispersion: the group velocity is

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