Assessment Improvement of Heat Performance and Hydraulic Thermal Flow in a Three‐Dimensional Tube Equipped With Different Turbulator Corrugated Arrangements
Heat Transfer,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 19, 2025
ABSTRACT
Corrugated
pipe
is
used
in
many
engineering
applications
because
of
its
high
performance
compared
with
smooth
pipe.
This
research
involved
numerical
simulations
and
experimental
testing
a
circular
tube
modified
flow
path
to
improve
the
heat
transfer
exchangers.
The
focus
was
on
enhancing
mixing
creating
vortex
flows
within
increase
exchange
efficiency.
impact
seven
design
factors,
including
ring
diameters
(RD)
pitch
between
pitches
(RP),
thermal–hydraulic
investigated.
Water
as
working
fluid
regime
ranges
from
4000
15,000,
indicating
turbulent
flow.
A
constant
flux
25,500
W/m
2
applied,
water
enters
system
at
temperature
298
K
(25°C).
properties
are
assumed
remain
throughout
conditions,
such
steady
state
(the
conditions
do
not
change
time),
incompressible
density
remains
constant),
no‐slip
condition
velocity
surface
any
solid
boundary
zero).
tubes
consistently
outperformed
due
increased
separation.
Both
increasing
Reynolds
number
decreasing
factors
led
formation
patterns.
In
RD
configurations,
Nusselt
saw
an
average
improvement
approximately
45.6%,
while
friction
factor
19%
57%.
RP
configurations
demonstrated
broader
range
enhancements,
reaching
up
35%,
increases
ranging
15%
42%.
Rings
can
significantly
enhance
tubes.
However,
best
configuration
depends
specific
application.
highest
performance,
resulting
1.38
evaluation
factor,
obtained
using
1
mm
20
mm.
simulated
data
showed
excellent
agreement,
maximum
discrepancy
less
than
11%
for
both
dimpled
Language: Английский
A Numerical Investigation of the Impact of Converging/Diverging Curved Channel Configuration on the Multi‐Channel Cold Plate Hydrothermal Performance
Heat Transfer,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 17, 2025
ABSTRACT
With
the
advancement
of
modern
electronics
and
increase
in
thermal
power
density,
heat
management
has
become
a
challenge
that
impacts
device
performance.
Cold
plates
are
an
effective
solution
liquid
cooling
systems,
improving
dissipation
stability.
This
study
presents
numerical
evaluation
multichannel
cold
plates'
hydraulic
performance
to
enhance
their
overall
efficiency.
Geometric
modifications
included
dual
ports
for
improved
flow
distribution,
transfer,
channel
structure
changes,
such
as
straight,
convergent,
divergent,
convergent/divergent
configurations.
Performance
was
assessed
through
temperature
pressure
drop,
efficiency
analysis
using
ANSYS
Fluent
22R1
under
incompressible
laminar
conditions
with
water
mass
rates
between
0.002
0.006
kg/s.
Compared
conventional
multi‐mini‐channel
plate
(CMMCP),
results
this
showed
flow‐splitting
effect
at
outlet
significantly
compared
single
outlet.
Using
one
inlet
two
outlets
achieved
higher
CMMCP,
reducing
loss
by
61%
Nusselt
number
14.4%.
Furthermore,
modifying
convergent
curve
central
had
greater
impact
on
than
divergent–convergent
curve.
Narrowing
increased
48.71%
design,
while
also
temperature.
The
double‐outlet,
convergent‐curved
design
performed
best
performance,
achieving
highest
fluid
rates,
1.81.
Language: Английский