Accurate fast computation of steady two-dimensional surface gravity waves in arbitrary depth

Abstract

This paper describes an efficient algorithm for computing steady two-dimensional surface gravity wave in irrotational motion. The algorithm complexity is O(N log N), N being the number of Fourier modes. The algorithm allows the arbitrary precision computation of waves in arbitrary depth, i.e., it works efficiently for Stokes, cnoidal and solitary waves, even for quite large steepnesses. The method is based on conformal mapping, Babenko equation rewritten in a suitable way, pseudo-spectral method and Petviashvili's iterations. The efficiency of the algorithm is illustrated via some relevant numerical examples. The code is open source, so interested readers can easily check the claims, use and modify the algorithm.

36 pages, 7 figures, 3 tables, 48 references, 4 appendices. Other author papers can be downloaded at http://www.denys-dutykh.com/

References in corpus (2)

• A generalized Petviashvili iteration method for scalar and vector Hamiltonian equations with arbitrary form of nonlinearity
• New exact relations for steady irrotational two-dimensional gravity and capillary surface waves

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