A SIMPLE-MODEL FOR THE EFFECT OF WATER SHEAR ON THE GENERATION OF WAVES BY WIND

被引：12

作者：

CAPONI, EA ^{[1
]}

CAPONI, MZ ^{[1
]}

SAFFMAN, PG ^{[1
]}

YUEN, HC ^{[1
]}

机构：

[1] CALTECH,PASADENA,CA 91125

来源：

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES | 1992年 / 438卷 / 1902期

关键词：

D O I：

10.1098/rspa.1992.0094

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The stability of the air-water interface with piecewise linear velocity profiles in the air and the water is analysed to study the effect of shear in the water on the generation of waves by wind. This simple formulation reduces the eigenvalue problem to the solution of a quartic equation, which facilitates the exploration of the dependence on the various physical parameters. The results indicate that the presence of water shear tends to enhance the Kelvin-Helmholtz-type instability and to lessen the Miles-type mechanism. In addition, the presence of water shear leads to a selection rule by which the growth of certain short wave components is suppressed. This may be relevant to high-frequency radar imaging of the ocean.

引用

页码：95 / 101

页数：7

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