Geoscience Reference
In-Depth Information
Fig. 42 Time-averaged
vorticity maps. (a) the vertical
plane of symmetry (with
streamlines), (b)verticalplane
at 30
from the symmetry axis
(with streamlines), and (c)the
scour hole, at a vertical plane
45
from the symmetry axis
(with velocity vectors).
Vorticity in s
1
a
0.8
400
300
0.6
200
100
0.4
0
0.2
100
−
0
−
200
0
0.2
0.4
0.6
0.8
1
1.2
x/D
(
−
)
b
1
400
300
0.8
200
0.6
100
0.4
0
0.2
−
100
0
0
−
200
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
x/D
(
−
)
c
0.8
150
100
0.7
50
0
0.6
0.5
−
50
0.4
−
100
0.3
−
150
0.2
−
200
0.1
250
−
0
0
0.1
0.2
0.3
0.4
0.5
0.6 0.7
0.8 0.9 1
1.1 1.2
x/D
(
−
)
