Capillary-gravity ship wave patterns

Hui Liang

doi:10.1016/S1001-6058(16)60794-1

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Capillary-gravity ship wave patterns

2017-10-01

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Hui Liang

Xiaobo Chen *

DOI：10.1016/S1001-6058(16)60794-1

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Abstract

En 中文

Ship wave pattern is a fascinating research topic in the fields of marine hydrodynamics and water waves. Within the pure-gravity wave theory, the ship wave pattern composed of transverse waves and divergent waves appearing on the downstream is confined within a sector symmetrical about the ship track with a half-angle 19 degrees 28'. However, when the surface tension is accounted for, the wave pattern is greatly modified especially at a low translating speed. Besides the minimum speed of capillary waves c(min) = 0.23 m/s below which waves cannot be generated, there is another critical speed c(div) = 0.45 m/s associated with the disappearance of divergent waves. In the present paper, the wave patterns created by a steadily translating source are studied, and they are examined with the crestlines obtained from the asymptotic analysis.

Keywords:

Ship waves

wave pattern

gravity-dominant waves

capillarity-dominant waves

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