MIKE 21 BW, User Manual, Page: 87 / 196

2DH Boussinesq Wave Module - Examples
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Figure 4.57 Circulation cell behind the detached breakwater for the case of direc-
tional waves. Computed time-averaged of the velocities beneath the
surface rollers. The time-averaging is performed for computational
points which can be partly wet, i.e. also inside the swash zone
Compared to the case with regular waves, the main features of the eddy
structure for random waves are that the quiescent area in the centre of the
eddy and the maximum speed is reduced.
Figure 4.58 shows a snapshot of the surface elevation for the case of regular
waves. A forward bend in the wave fronts can be seen near the breakwater.
This phenomenon is caused by the strong following current with a maximum
Froude number of 0.2-0.3.