Energies,
Journal Year:
2024,
Volume and Issue:
17(20), P. 5076 - 5076
Published: Oct. 12, 2024
As
electronics
become
more
powerful
and
compact,
laminated
microchannel
heat
sinks
(MCHSs)
are
essential
for
handling
high
flux.
This
study
aims
to
optimize
the
MCHS
design
improved
dissipation
structural
strength.
An
orthogonal
experiment
was
established
with
average
surface
temperature
of
source
as
evaluation
metric,
optimal
structure
determined
through
simulation.
Finally,
cooling
uniformity,
fluidity,
performance
criterion
(PEC)
analyses
were
carried
out
on
structure.
It
that
combination
triangular
cavity
(MCTC),
a
width
0.5
mm,
distribution
density
60%,
presence
undulation
microchannels.
The
result
shows
structure’s
peak
inter-layer
stress
is
just
34.8%
its
longitudinal
tensile
Compared
traditional
parallel
straight
(MCPS),
this
boasts
an
8.6
K
decrease
in
variation
along
specific
paths
only
9.9%
designs.
Moreover,
cuts
velocity
loss
at
entrance
from
75%
59%.
Thus,
research
successfully
develops
effective
optimization
strategy
MCHSs.
Journal of Mines Metals and Fuels,
Journal Year:
2024,
Volume and Issue:
unknown, P. 557 - 579
Published: Sept. 4, 2024
Electronic
cooling
is
crucial
for
modern
electronic
device
design,
ensuring
devices
operate
at
peak
performance,
reliability,
and
longevity.
This
paper
offers
an
in-depth
critical
review
of
technologies,
covering
both
established
methods
recent
innovations.
It
explores
the
challenges
in
cooling,
such
as
effective
heat
dissipation,
thermal
management,
reliability
concerns.
Various
strategies
are
examined,
including
air
liquid
phase-change
emerging
technologies
like
thermoelectric
two-phase
immersion
cooling.
The
also
evaluates
advancements
materials,
manufacturing
processes
that
have
transformed
Additionally,
it
discusses
impact
on
energy
efficiency,
environmental
sustainability,
cost-effectiveness.
Finally,
highlights
future
research
directions
opportunities
innovation
to
meet
increasing
demands
high-performance
systems.
findings
provide
valuable
insights
design
engineers,
assisting
optimal
IC
chip
placement
substrate
board
enhance
extend
operational
lifespan.
International Journal of Thermofluids,
Journal Year:
2024,
Volume and Issue:
22, P. 100630 - 100630
Published: March 11, 2024
This
numerical
investigation
considers
the
mixed
convection
of
a
magnetically
influenced
hybrid
nanofluid
in
two-dimensional
square
cavity
containing
centrally
positioned
rotating
circle
cylinder
with
radius
R=0.12.
The
within
enclosure
is
water-based
and
incorporates
Ag-MgO
nanoparticles,
chemical
physical
interactions
between
MgO
nanoparticles
Ag
molecules
play
an
important
function
determining
thermal
conductivity
dynamic
viscosity
MgO-Ag
nanofluid.
These
findings
exhibit
that
has
potential
to
be
used
as
advanced
heat
transfer
fluid
cooling
systems
exchangers.
Two
distinct
cases
are
examined:
firstly,
all
walls
being
adiabatic,
except
for
bottom
side,
secondly,
right
side
maintained
at
isothermal
condition.
A
finite
element
software
package
(FLEXPDE)
present
study.
governing
partial
equations,
rendered
dimensionless
encompassing
various
parameters,
solved
utilising
Galerkin-based
method.
Novelty
injected
into
exploration
through
meticulous
parametric
study,
delving
influence
key
including
angular
velocity
spanning
from
-25
25,
Reynolds
number
(10
≤
Re
100),
Richardson
(0
Ri
35).
outcomes
vividly
portrayed
visualisation
flow
structure
via
streamlines,
depiction
process
isotherms,
computation
average
Nusselt
numbers.
discernible
trend
emerges,
demonstrating
increase
number,
rotation
speed,
corresponds
elevation
number.
Increasing
(Re)
10
50
intensifies
indicating
fivefold
higher
resistance,
isotherms
=
showing
80%
concentration
near
hot
wall
compared
10.
Counterclockwise
induces
90%
curvature
bottom,
clockwise
top,
highlighting
directional
effects
on
resistance
streamlines.
Remarkably,
intriguing
observation
surfaces
counterclockwise,
revealing
10%
augmentation
values
direction.
Furthermore,
adoption
nanofluids
agents,
lieu
pure
water,
shown
enhance
cavity's
overall
performance,
surpassing
previous
results.
underscores
novel
insight
advantageous
utilisation
improving
efficacy
systems.
International Journal of Thermofluids,
Journal Year:
2024,
Volume and Issue:
22, P. 100669 - 100669
Published: April 22, 2024
Nanomaterials
used
as
additives
to
diesel,
biodiesel,
and
its
blends
have
shown
promising
results
in
improving
thermal
efficiency
reducing
pollutant
emissions
compression
ignition
engines.
However,
the
stability
of
dispersions
has
been
noted
literature
a
primary
challenge
effective
use
nanomaterials
fuel
additives.
Between
fuels
are
carbon
nanotubes
(CNTs).
These
carbonaceous
materials
positive
negative
concerning
engine
performance
emissions,
differences
could
be
associated
with
dispersion
fuel.
Therefore,
there
is
still
much
uncertainty
regarding
relationship
between
nanomaterial
impact
nanofuels
on
performance.
Specifically,
current
lacks
sufficient
information
incorporating
amide-functionalized
(CNT)
diesel-biodiesel
their
influence
particulate
matter
ICE.
In
this
study
CNT
were
dispersed
Colombian
commercial
diesel
(10
%
vol.
palm
oil
biodiesel)
was
evaluated.
The
most
stable
stationary
Ignition
Compression
Engine
(ICE)
evaluate
emissions.
Results
show
that
it
not
possible
disperse
biodiesel
90
petroleum
diesel)
due
high
rate
agglomeration
sedimentation.
contrast,
opposite
behavior
using
base
An
amide
functionalization
process
carried
out
generate
repulsion
improve
Amide-functionalized
(CNTF)
obtained
pristine
Oleylamine
nitrogen
functional
group
precursors.
X-ray
Photoelectron
Spectroscopy
confirmed
groups
surface,
loss
weight
14
identified
temperature
range
150-550°C,
indicating
grade
functionalization.
Functionalized
non-functionalized
concentration
100
mg/L
dispersion's
colloidal
stability.
This
examined
for
three
days
by
visual
inspection
variation
hydrodynamic
diameter
dynamic
light
scattering.
prepared
at
two
concentrations
(50
mg/L)
engine.
Colloidal
enhanced
when
CNTF
compared
unstable,
dispersion.
similar.
Compared
diesel-CNTF
did
considerably
engine´s
6
kW,
only
minor
gain
observed
12
kW
mg/L.
they
reduced
up
39.8%.
case
utilizing
both
functionalized
additives,
increased,
CO
decreased.
International Journal of Thermofluids,
Journal Year:
2024,
Volume and Issue:
22, P. 100644 - 100644
Published: March 28, 2024
Being
one
of
the
most
efficient
devices
for
passive
two-phase
heat
transfer,
pulsating
pipes
(PHPs)
exchange
considerable
powers
through
a
small
cross-sectional
area,
which
can
be
used
in
various
fields
such
as
thermal
control,
electronic
cooling,
waste
recovery,
etc.
Numerous
studies
have
been
performed
recent
years
to
investigate
effect
channel
geometry
and
characteristics
critical
challenge
that
directly
affects
system
performance.
An
overview
developments
PHPs
improving
performance
is
provided
present
article,
with
particular
emphasis
on
effects
characteristics.
This
paper
provides
comprehensive
this
field,
discusses
experimental
numerical
conducted,
challenges
still
facing
current
state
art.
review
valuable
resource
researchers
scholars
studying
modeling
aspects
PHPs.
It
supplies
them
detailed
insights
analysis,
helping
stay
updated
latest
field.
Exploring
enhancement
offers
foundation
future
research
directions.
Therefore,
utilize
inform
their
investigations,
refine
methodologies,
contribute
advancing
PHP
technology.
International Journal of Thermofluids,
Journal Year:
2023,
Volume and Issue:
20, P. 100438 - 100438
Published: Aug. 9, 2023
A
Synthetic
Jet
Actuator
(SJA)
is
a
fluidic
device
that
generates
quasi-steady
jet
of
fluid
by
the
cyclic
suction
and
blowing
into
out
cavity
across
slot
or
an
orifice
such
net
mass
flux
zero
over
actuation
cycle.
The
unique
features
SJA
including
short
response
time,
high
velocity,
no
requirement
for
external
air
supply,
lack
complex
piping
compactness,
have
attracted
lot
attention
in
recent
years,
it
has
been
subject
intense
research
mechanics
heat
transfer
fields.
aim
this
review
paper
to
present
comprehensive
characteristics
SJAs
quiescent
conditions,
interaction
with
cross
flow
their
application
separation
control
enhancement
processes.
effects
geometrical
operational
parameters
on
performance
presented
conditions.
applications
technology
models
simple
geometries
reviewed
discussed.
Moreover,
cooling
purposes,
influence
crucial
design
operating
reviewed.
World Journal of Engineering,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Feb. 6, 2024
Purpose
The
research
focused
on
analysing
a
unique
type
of
heat
exchanger
that
uses
swirling
air
flow
over
heated
tubes.
This
includes
round
baffle
plate
with
holes
and
opposite-oriented
trapezoidal
deflectors
attached
at
different
angles.
are
spaced
various
distances,
the
tubes
arranged
in
circular
pattern
while
maintaining
constant
flux.
Design/methodology/approach
setup
is
housed
inside
duct
airflow
longitudinal
direction.
study
examined
impact
inclination
angles
pitch
ratios
performance
within
specific
range
Reynolds
numbers.
Findings
findings
revealed
angle
significantly
affected
velocity,
higher
resulting
increased
velocity.
transfer
was
best
lower
ratios.
Flow
resistance
decreased
increasing
ratio.
Originality/value
average
thermal
enhancement
factor
angles,
maximum
value
observed
as
0.94
ratio
1
an
30°.
