MIKE 21 SW is a 3rd generation spectral wind-wave model that simulates the growth, decay and transformation of wind-generated waves and swells in offshore and coastal areas. The model includes wave growth by action of wind, non-linear wave-wave interaction, dissipation by white-capping, dissipation by wave breaking, dissipation due to bottom friction, refraction due to depth variations, and wave-current interaction.
MIKE 21 NSW is a spectral wind-wave model, which describes the propagation, growth and decay of short-period waves in nearshore areas. The model includes the effects of refraction and shoaling due to varying depth, wave generation due to wind and energy dissipation due to bottom friction and wave breaking.
MIKE 21 EMS (elliptic mild-slope wave) simulates the propagation of linear time harmonic water waves on a gently sloping bathymetry with arbitrary water depth. MIKE 21 EMS is capable of reproducing the combined effects of shoaling, refraction, diffraction and back-scattering. Likewise energy dissipation, due to wave breaking and bed friction, is included as well as partial reflection and transmission through for instance pier structures and breakwaters.
MIKE 21 PMS (parabolic mild-slope) can be applied to any water depth on a gently sloping bathymetry, and it is capable of reproducing phenomena, such as shoaling, refraction, dissipation due to bed friction and wave breaking, forward scattering and partial diffraction. MIKE 21 PMS is used to determine wave fields in open coastal areas, in coastal areas with structures where reflection and diffraction along the x-direction are negligible, in navigation channels, etc. Furthermore, MIKE 21 PMS can produce the wave radiation stresses required for the simulation of wave-induced currents, which is very important in the computation of coastal sediment transport.
MIKE 21 BW is based on the numerical solution of a new form of the two-dimensional Boussinesq equations including non-linearity and frequency dispersion. The model is capable of reproducing the combined effects of most wave phenomena of interest in coastal and harbour engineering. These include shoaling, refraction, diffraction and partial reflection of irregular short-crested and long-crested finite-amplitude waves propagating over complex bathymetries. Phenomena, such as wave grouping, generation of bound sub-harmonics and super-harmonics and near-resonant triad interactions, can also be modelled using MIKE 21 BW.