MS Thesis R. Hager - Hawaii National Marine Renewable Energy ...

multiply the results by particular wave amplitudes. Caution is needed in doing this that thewave amplitude satisfies linear potential theory.4.3 Numerical ValidationResults from AQWA are validated by comparing with the numerical results of Koo and Kim(2005) as well as the experimental results by Nojiri and Murayama (1975). Koo and Kimstudied the diffraction problem for a two-dimensional, surface- piercing, single and dualLewis form hull, as seen in Figure 4.27. The same single body case is analyzed with AQWAfor comparison in this study. The dimensions of the body are given in Table 4.1, where B,W, and D denote the body’s length, width, and draft, respectively. The width and length aretaken at the still water level. The curved radius prevents turbulence from occurring. Koo andKim used a two-dimensional numerical wave tank (NWT) based on potential theory withnonlinear free-surface boundary conditions and acceleration-potential method.Comparatively, AQWA is based on linear potential theory with linearized boundaryconditions. However, for small wave amplitudes, the two models should predict the same orsimilar results.B= 0.5 mD= 0.25mFigure 4. 27 Lewis Form Hull73