IntechOpen eBooks,
Год журнала:
2023,
Номер
unknown
Опубликована: Дек. 4, 2023
Vortex
definition
and
identification
are
extremely
important
for
the
study
of
fluid
dynamics
research.
Liutex
is
a
newly
proposed
concept
that
correctly
represents
vortex.
vector
whose
direction
local
rotation
axis
magnitude
twice
angular
speed.
To
identify
unique
structure
vortex,
method
known
as
Core
Line
has
been
developed,
which
displays
rotational
core
However,
original
manual
method,
not
practical
real
application,
an
automatic
algorithm
required
usage.
Xu
et
al.
by
selecting
best
line
from
group
candidate
lines,
progress.
In
this
chapter,
another
perspective
to
solve
problem,
new
introduced
based
on
forward
gradient
lines.
Since
lines
have
feature
they
advance
maximums,
route
will
still
result
in
line,
avoids
process
find
line.
This
achieved
some
success
Lambda
vortex
early
boundary
layer
transition.
Energies,
Год журнала:
2023,
Номер
16(5), С. 2130 - 2130
Опубликована: Фев. 22, 2023
The
influence
of
the
improvement
finned
tube
radiator
unit
structure
on
fluid
flow
and
heat
transfer
effect
locomotive
was
studied.
A
saw-toothed
fin
with
aluminum
instead
copper
proposed
to
keep
position
size
flat
hot
water
pipe
unchanged.
CFD
simulation
analysis
carried
out
by
ICEPAK17.0,
under
conditions
an
ambient
temperature
24.6
°C,
atmospheric
pressure
85,040
Pa
air
density
ρ
=
0.94
kg/m3,
compare
changes
velocity
field,
turbulence
field
synergy
angle.
sawtooth
new
sink
increases
fluid,
reduces
thickness
outer
boundary
layer
pipe,
strengthens
radiator.
Finally,
baffle
height,
wing
window
width
angle
were
selected,
coefficient
three
low,
medium
high
used
as
indexes
analyze
each
parameter
performance
results
show
that
dissipation
serrated
sheet
is
higher
than
sheet,
increased
about
1.3%,
average
reduced,
improved,
reduced
2.3°,
has
better
performance.
factor
greatest
least
pressure.
When
0.15
mm
high,
largest,
height
change
highest
included
Angle
effect,
higher.
By
changing
structure,
thermal
can
be
improved.
