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reg
pac
Leh
Fig
eneration
ckets is no
high obser
gure 6.8).
of the stru
ot greatly
rved in a
uctures and
different
a syntheti
d by their
from what
ic turbule
clustering
t the grou
ent layer
g into
up at
(see
Fig
te
gure 6.8.
For
ertiary structu
rmation of pac
ure induced b
ckets with the
by a “mother”
e apparition o
vortex, accord
of a secondary
ding to [ZHO
y and
99]
Z
sym
x
+
Zhou
et al.
mmetrical s
200
[ZHO 99]
structures,
hen they inj
ese structu
arrangeme
estimated
and show
nject structu
ures align
ent in direc
d
x
+
0
for the in
nitial
se at
s into
h an
Δ=
wed that
300
PS
decrea
ar to QSVs
y but with
UE 89].
x
+
Δ
ures simila
coherentl
ction
z
[GU
Δ
PS
P
+
wh
flow. The
ymmetrical
the
asy
=
F
mea
by
corr
ass
(
Figure 6.9
asurements
Adrian
et
respond to
ociated
wit
)
shows th
s obtained
al.
[ADR 0
o the spanw
th the hea
We can cle
orm by th
he particle
in a bound
00]. The c
wise vortic
ads of HPV
early see th
he amalgam
image vel
dary layer w
ontours in
city layers
Vs. The ve
hat elongat
mation of
locimetry (
with
(PIV)
2, 250
mage
to be
esent
of low
essive
τ
=
n the top im
believed t
ectors repre
ted zones o
the succe
Re
2
U y
mom
y
.
mentum fo
−
0.8
U
∞
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