Geoscience Reference
In-Depth Information
0.8
30
20
0.6
10
0.4
0
0.2
−
10
0
0
0.2
0.4
0.6
0.8
1
1.2
0.8
10
0.6
0
0.4
−
10
0.2
−
20
0
0
−
30
0.2
0.4
0.6
0.8
1
1.2
x /D (
−
)
Fig. 39 Time-averaged velocity components in test CC, symmetry axis. On
top
: longitudinal
component
u
;
bottom
: vertical component
w
. Velocities in cm/s
1
30
0.8
20
0.6
0.4
0.2
0
0
10
0
−
10
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1
10
0.8
0
0.6
−
10
0.4
0.2
0
0
−
20
−
30
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
x/D
(
−
)
Fig. 40 Time-averaged velocity components in test CC, at 30
from the symmetry axis. On
top
:
component
u
p
;
bottom
: vertical component
w
. Velocities in cm/s
in the image plane. Figure
41
shows the velocity field inside the scour hole, in a
vertical plane at 45
from the symmetry axis.
In Fig.
39
, in the upstream region, it is noted the dominance of the
u
-component,
being the vertical component practically negligible. As the flow approaches the
