Abstract
This paper presents an improved technique to generate rogue (freak) waves embedded in random sea based on the approach proposed by Kribel and Alsina (2000). In this method, a part of the wave energy is focused using the temporal-spatial focusing approach to generate an extreme transient wave and the rest behaves randomly. By introducing a correction term, the improved technique removes the numerical.ly spurious fluctuations of the spectra in the existing approach. Various effects of the correction are investigated numerically by using the second-order wave theory and two existing numerical. methods based on the fully nonlinear potential theory (FNPT), including the improved Spectral Boundary Integral (SBI) method and the Quasi Arbitrary Lagrangian-Eulerian Finite Element Method (QALE-FEM). The discussions are mainly focused on (1) the effectiveness of the correction on retaining the features of the specified wave spectrum; and (2) the effects of the correction on the probability of the maximum wave heights.
| Original language | English |
|---|---|
| Pages (from-to) | 263-289 |
| Number of pages | 27 |
| Journal | CMES - Computer Modeling in Engineering and Sciences |
| Volume | 106 |
| Issue number | 4 |
| Publication status | Published - 2015 |
| Externally published | Yes |
Keywords
- 2nd order wave theory
- FNPT
- Improved SBI
- QALE-FEM
- Random sea
- Rogue waves
ASJC Scopus subject areas
- Software
- Modelling and Simulation
- Computer Science Applications