Examples
98
MIKE 21 BW - © DHI
Binary data files
Parameter files
4.3.2
Sloping beach with wave breaking and moving shoreline
Purpose of the example
Wave breaking and wave run-up on a gently sloping plane beach is consid-
ered in this example. The example concentrates on shoaling of regular waves
and spilling type of wave breaking.
Model setup
The model setup follows the experimental setup by Ting and Kirby (1994).
They presented measurements for spilling and plunging type of breakers on a
plane sloping beach with a slope of 1/35 starting in depth of 0.40 m. The
model setup is illustrated in Figure 4.67. Waves are generated at internal
points by source terms, representing the volume flux in progressive waves.
The wave period is 2.0 s and the wave height 0.121 m. The seaward bound-
ary is treated as nonreflective, using sponge layer (100 points). A moving
shoreline is included in the simulation, using a slot width of
= 0.01 and a
smoothing parameter of
= 100 (default values in MIKE 21 BW). A 50 point
wide sponge layer is used in the slot in order to damp the oscillations in the
slot, see Figure 4.67. With respect to the parameters of the breaker model
the following standard (default) values are applied: initial breaking angle
b
=
20
, final breaking angle
o
= 10
, half-time for cut-off roller t
1/2
= T/5 = 0.4 and
roller form factor f
d
= 1.5. An explicit filter is introduced near the still water
shoreline to remove short-wave instabilities during uprush and downrush and
to dissipate the wave energy in the model area where the surface roller can-
not be resolved.
Name:
Partial_Reflection_mesh.dfs1
Description:
Mesh
Name:
Partial_Reflection_model.dfs1
Description:
Sponge and porosity layer coefficients
Name:
RegularWave_H1.0T8.0h10.0.dfs0
Description:
Wave generation data in case of regular waves
Name:
IrregularWave_Hs1.0Tp8.0h10.0
Description:
Wave generation data in case of irregular waves
Name:
Regular_wave_simulation.bw
Description:
PFS-file for the regular wave case
Name:
Irregular_wave_simulation.bw
Description:
PFS-file for the irregular wave case
Summary of Contents for 21 BW
Page 1: ...MIKE 2017 MIKE 21 BW Boussinesq Waves Module User Guide...
Page 2: ...2...
Page 4: ...4 MIKE 21 BW DHI...
Page 16: ...Introduction 16 MIKE 21 BW DHI...
Page 190: ...Reference Manual 190 MIKE 21 BW DHI...
Page 192: ...Scientific Documentation 192 MIKE 21 BW DHI...
Page 193: ...193 INDEX...