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Third-order approximation to short-crested waves

Published online by Cambridge University Press:  19 April 2006

J. R. C. Hsu,
Y. Tsuchiya and
R. Silvester
J. R. C. Hsu
Affiliation:
Department of Civil Engineering, The University of Western Australia, Nedlands
Y. Tsuchiya
Affiliation:
Department of Civil Engineering, The University of Western Australia, NedlandsPermanent address: Disaster Prevention Research Institute, Kyoto University, Japan.
R. Silvester
Affiliation:
Department of Civil Engineering, The University of Western Australia, Nedlands
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Abstract

Short-crested wave systems, as produced by two progressive waves propagating at an oblique angle to each other, have an extremely important effect on a sedimentary bed. The complex water-particle motions are conducive to lifting material into suspension and sustaining it in motion. In order to study this phenomenon rigorously, the variables of this wave system are derived to a third-order approximation by a perturbation method. The case of waves reflecting obliquely from a vertical wall is examined under the assumptions of full reflexion, uniform finite depth and an inviscid incompressible fluid. The new formulation reduces to standing or Stokes waves at the limiting angles of approach. Expressions for kinematic quantities are also presented.

Information

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 90 , Issue 1 , 16 January 1979, pp. 179 - 196
Copyright
© 1979 Cambridge University Press

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