Generation of a spatially periodic directional wave field in a rectangular wave basin based on higher-order spectral simulation
| Autor: | Takuji Waseda, Katsuji Tanizawa, Wataru Fujimoto, Hidetaka Houtani, Keiji Kiyomatsu |
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| Rok vydání: | 2018 |
| Předmět: |
Surface (mathematics)
Physics Environmental Engineering 010504 meteorology & atmospheric sciences Series (mathematics) Spectrum (functional analysis) Elevation Order (ring theory) Ocean Engineering 01 natural sciences Spectral line 010305 fluids & plasmas Computational physics 0103 physical sciences Rogue wave Spectral method 0105 earth and related environmental sciences |
| Zdroj: | Ocean Engineering. 169:428-441 |
| ISSN: | 0029-8018 |
| Popis: | A new wave generation method, called HOSM-WG, is presented in this paper. The method utilizes the precomputed spatially periodic wave field based on the higher-order spectral method (HOSM) simulation to calculate the wave-maker signals. The spatially periodic wave fields were reproduced in a rectangular basin with 382 wave makers on the peripheral. Upon wave generation, the bound components are excluded from the spectrum and the free waves are generated by applying the Schaffer's second-order correction. The HOSM-WG was first validated for unidirectional spatially-periodic modulated wave trains generated in physical and numerical wave basins. Then, freak waves in unidirectional irregular waves and in directional irregular waves were generated. The time series of surface elevation, frequency spectra, and spatial wave profiles compared well between the HOSM-WG and HOSM simulation even for a broad bimodal directional spectrum. |
| Databáze: | OpenAIRE |
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