| dc.contributor.author | Susilo, Adhi. | en_US |
| dc.date.accessioned | 2014-10-21T12:35:52Z | |
| dc.date.available | 2007 | |
| dc.date.issued | 2007 | en_US |
| dc.identifier.other | AAINR35795 | en_US |
| dc.identifier.uri | http://hdl.handle.net/10222/54984 | |
| dc.description | A fast accurate computation of nonlinear wave-wave interactions is needed for practical wave modeling. For all modern wave models such as WAM, SWAN and WAVE-WATCH III, wave-wave interactions are computed using the Discrete Interaction Approximation (DIA). It is the centre of these models. While the DIA is fast, it is well know that it is not accurate. An accurate solution was proposed by Webb, Tracy and Resio (WRT) some years ago. Unfortunately, the WRT algorithm is still much slower than the DIA, and cannot be used operationally. | en_US |
| dc.description | Based on Tracy and Resio's work, this thesis develops a new method which approximates the dominant contributions to the calculation of the total nonlinear wave-wave interactions. This method is denoted the Advanced Dominant Interaction (AvDI) method. This method saves computational time by choosing sets of interacting waves that account for the most important portion of the nonlinear wave transfer, so that it isn't necessary to integrate the contributions from the entire spectrum of possible wave-wave interactions. Taking account of the dominant transfer along wavenumbers and angles of interactions, the AvDI method can reduce the required computation time and space sufficiently that it can be implemented for practical wave modelling. | en_US |
| dc.description | The AvDI method was implemented in an operational wave model and tested for ideal wave spectral cases and for a real storm. WAVEWATCH III wave model was chosen as a test-bed for implementation of the AvDI method. Fetch- and duration-limited growth tests were used in the ideal cases. Comparisons with waves observed during hurricane Juan constitute the red storm test. Compared to DIA, results show that AvDI method can be used as an alternative competitive method to compute the nonlinear wave-wave interactions. | en_US |
| dc.description | Thesis (Ph.D.)--Dalhousie University (Canada), 2007. | en_US |
| dc.language | eng | en_US |
| dc.publisher | Dalhousie University | en_US |
| dc.publisher | | en_US |
| dc.subject | Mathematics. | en_US |
| dc.title | Modified Boltzmann integral for practical wave modelling. | en_US |
| dc.type | text | en_US |
| dc.contributor.degree | Ph.D. | en_US |
