Civil Engineering Reference
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Fig. 3.4 Time setup of simulation under ocean box. The whole simulation time spans 5, respec-
tively 30, days. Three days of spin-up is required. During spin-up, wind forcing is slowly increased
to avoid unrequested dynamical effects within the ocean box. Over the last 2 days, a constant wind
field of METRAS forces the ocean box.
Dashed lines
show wind speed of wind component
u
,
solid
lines
of component
v
. Each component is separated into
(
pink
), which stand
for different wind forcing fields regarding forcing without OWF signal and with OWF signal. The
wind field forces the ocean every 10 min (time index of
x
-axis)
ref
(
violet
) and
owf
'
'
'
'
a
b
c
Fig. 3.5 Setup of temperature (
red
) and salinity (
blue
) start fields for whole ocean box. (a) For
TS01, a linear decreasing/increasing of temperature/salinity is applied with values in accordance
with North Sea conditions. (b) TS02 is a simplified stratification with only two layers being
separated in 12-m depths. (c) TS03 is based on CTD measurements taken in May 2013 around the
test wind farm
alpha ventus
Stratification of TS01
is in accordance with the most common North Sea
conditions, which mean warmer and fresher surface layer of 15.0
C and 34.0 psu
units and a thermocline in 12-m depths. Near-bottom temperature is set to 7.0
C
with a salinity of 35.0 psu.
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