Physics of Fluids,
Journal Year:
2024,
Volume and Issue:
36(12)
Published: Dec. 1, 2024
A
topology
optimization-based
design
method
for
liquid
cooling
garments
(LCGs)
is
proposed,
aiming
to
enhance
the
heat
flow
performance
of
LCG
systems
by
optimizing
internal
microchannel
structures.
The
primary
objective
improve
and
transfer
characteristics
in
high-temperature
environments,
ensuring
efficient
dissipation.
To
achieve
this,
a
novel
film
replaces
traditional
fixed
hose
structures
integrates
with
water-cooled
exchanger,
forming
modular
system
that
facilitates
rapid
assembly.
variable-density
optimization
model
applied
refine
configurations,
examining
effects
fluid
domain
volume
fractions
multi-objective
weighting
factors.
findings
indicate
as
increase,
designs
become
finer,
leading
improved
dissipation
efficiency
reduced
pressure
drop.
Numerical
simulations
experimental
validations
reveal
topology-optimized
(TO)
outperforms
(TRA
TRB)
terms
performance,
observed
studies
on
fields,
distributions,
temperature
profiles,
Nusselt
numbers.
Specifically,
TO
reduces
average
30.96%
compared
TRA
maximum
19.46%
TRB
at
rate
240
ml/min.
At
voltage
8
V
700
ml/min,
TO-designed
LCGs
steady-state
24
°C,
exhibiting
superior
under
high-flow
scenarios.
also
demonstrates
faster
thermal
equilibrium
gradient,
contributing
enhanced
wearer
comfort.
This
research
confirms
efficacy
optimization,
offering
theoretical
basis
practical
framework
developing
high-performance
systems.
Chemical Engineering & Technology,
Journal Year:
2023,
Volume and Issue:
46(10), P. 2034 - 2045
Published: July 6, 2023
Abstract
Two
different
types
of
hollow‐fiber
membrane
contactors
were
used
for
CO
2
separation
from
the
gas
stream
with
monoethanolamine
(MEA)
absorbent
and
numerically
investigated.
After
model
validation
experimental
data,
removal
efficiency,
MEA
concentration,
pressure
drop
variation
examined
under
conditions
by
some
effective
parameters
such
as
velocity,
absorption
solution
porosity,
tortuosity.
Membrane
tortuosity
porosity
enhancement
led
to
light
decrease
increase
in
respectively,
but
velocity
significantly
reduced
efficiency.
Biomicrofluidics,
Journal Year:
2024,
Volume and Issue:
18(2)
Published: March 1, 2024
Acoustohydrodynamic
micromixers
offer
excellent
mixing
efficiency,
cost-effectiveness,
and
flexible
controllability
compared
with
conventional
micromixers.
There
are
two
mechanisms
in
acoustic
micromixers:
indirect
influence
by
induced
streamlines,
exemplified
sharp-edge
micromixers,
direct
waves,
represented
surface
wave
The
former
utilizes
structures,
while
the
latter
employs
action
to
affect
both
fluid
its
particles.
However,
traditional
bubbles
achieve
significant
performance
numerous
programmable
platforms
provide
solutions
wide
applicability.
This
review
offers
a
comprehensive
overview
of
various
elucidates
their
underlying
principles,
explores
biomedical
applications.
In
addition,
advanced
micromixing
impressive
versatility,
convenience,
ability
cross-scale
operations
is
introduced
detail.
We
believe
this
will
benefit
researchers
field
know
find
suitable
method
for
Processes,
Journal Year:
2023,
Volume and Issue:
11(6), P. 1845 - 1845
Published: June 19, 2023
In
this
research,
experimental
investigation
and
the
computational
fluid
dynamic
(CFD)
simulation
of
a
cryogenic
condenser
for
oxygen
liquefaction
was
carried
out.
The
liquid
nitrogen
used
as
cooling
fluid.
section,
three-dimensional
model
with
structured
mesh
high
quality
aspect
ratio
skewness
considered.
multi-phase
flow
inside
studied
numerically,
using
volume
(VOF)
method.
This
work
also
examined
assessment
vapor
generation
rate
during
condensation
oxygen,
based
on
boiling
heat
transfer
mechanism
unique
physical
characteristics.
experiment
conducted
to
examine
results.
effect
height
mass
flows
investigated
dynamics
(CFD).
average
deviation
CFD
predictions
from
available
17%.
Fluid Dynamics Research,
Journal Year:
2024,
Volume and Issue:
56(6), P. 065504 - 065504
Published: Nov. 12, 2024
Abstract
Microfluidic
devices
are
increasingly
valuable
for
their
compact
size
and
ability
to
handle
tiny
fluid
volumes,
making
efficient
mixing
at
this
scale
(micromixing)
a
critical
focus.
This
research
aims
optimize
micromixer
geometries
improve
efficiency
while
controlling
pressure
drop,
providing
method
that
balances
performance
computational
cost.
Building
on
previous
work,
we
introduce
novel
optimization
framework
in
microfluidics
combining
dynamics
(CFD)
machine
learning
(ML)
techniques,
particularly
Gaussian
process
(GP)
modeling
with
Genetic
Algorithm
(GA)
optimization.
Inspired
by
Y-type
design
cylindrical
grooves
the
main
channel’s
surface
internal
obstructions,
our
study
examines
impact
of
circular
obstructions
percentage
drop
under
varying
obstruction
diameter
offset.
Simulations
conducted
using
OpenFOAM
software
generate
data
reduced-order
GP
model,
which
provides
model
uncertainty.
The
geometry
is
then
optimized
GA
algorithm
reduced
model.
Results
indicate
medium-sized
(137
mm
diameter,
10
offset)
near
channel
wall
achieve
optimal
performance,
closely
aligning
studies.
uncertainties,
recorded
as
3.9%
21.5%
respectively,
further
validate
robustness
highlights
an
effective,
uncertainty-quantified
leverages
CFD
ML
integration,
setting
foundation
microfluidic
strategies.
Numerical Heat Transfer Part A Applications,
Journal Year:
2023,
Volume and Issue:
unknown, P. 1 - 27
Published: Nov. 1, 2023
This
article
demonstrates
that
using
a
wavy
microchannel
instead
of
smooth
can
enhance
thermal
and
hydraulic
performance
in
both
single
two-phase
flow.
Various
parameters
such
as
Nusselt
number
(Nu),
friction
factor
(f),
(PF),
enhancement
(EF)
are
estimated
for
different
microchannels
with
varying
waviness
amplitudes.
The
heat
transfer
coefficient
(HTC)
varies
significantly
flux,
particularly
due
to
nucleate
boiling.
improvement
is
evident
the
highest
values
ratio
(Nutp/Nusp
=
2.35),
PFwavy
1.4,
EF
1.88
achieved
at
specific
operating
conditions
(heat
flux
100
W/cm2,
mass
188
kg/m2s,
amplitude
0.1
mm,
wavelength
1
mm).
However,
increase
decrease,
Nutp/Nusp,
PF,
decline
pressure
drop
penalty
outweighing
benefits
enhancement.
also
explores
designs
mitigating
hot
spots,
including
one
decreasing
along
flow
direction
another
shorter
middle.
these
more
suitable
single-phase
