8
Figure 1.1: Computational domain of the model.
1.2 General Description of the Model
This section is a description of the numerical model that has been constructed to calcu
late the wave and current field within a given domain. This domain usually is bordered by
a shoreline along one boundary and an offshore region along the opposite boundary. The
other boundaries are sufficiently far from the region of interest (i.e. a structure or shoal,
etc.) so as to not affect the region of interest. This will be discussed further in the section
on boundary conditions. The computational domain for the purposes of this investigation
consists of a rectilinear coordinate system. Figure 1.1 shows the computational domain.
The model consists of two parts, a circulation model and a wave model. The circulation
model computes the mean water surface level and the depth averaged mean currents using
the radiation stresses from the waves as the forcing terms and includes bottom friction,
advective acceleration terms and the lateral diffusion of current momentum. The wave
model determines the radiation stress terms by first solving for the complex amplitude as a