Numerical study on hydrodynamic characteristics and heat transfer enhancement of gas-liquid Taylor flow in divergent microchannels
Process Safety and Environmental Protection,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
Язык: Английский
Experimental investigation of flow boiling heat transfer and instabilities in microchannels at high liquid subcooling
Physics of Fluids,
Год журнала:
2025,
Номер
37(3)
Опубликована: Март 1, 2025
Flow
boiling
in
a
microchannel
effectively
removes
high
heat
flux
and
plays
crucial
role
the
thermal
management
of
electronic
devices.
Microchannel
dimensional
parameters
have
significant
impact
on
flow
characteristics,
but
their
quantitative
correlation
with
behavior
remains
undetermined.
In
this
work,
five
microchannels
different
were
designed
to
investigate
effects
geometric
characteristics
under
liquid
subcooling
(70
°C).
The
study
identified
two
primary
patterns
microchannel:
bubble
slug
flow.
Special
was
observed.
expanded
rapidly
at
exit
microchannel,
head
shrank
into
small
bubbles
detached.
remaining
channel
would
be
temporarily
quiescent.
Additionally,
increasing
rib
width
decreasing
accelerated
transition
prematurely
triggered
critical
(CHF).
Increasing
number
channels
can
lead
reduction
CHF
significantly
lower
wall
temperature
by
more
than
18
°C.
A
280.7
W/cm2
achieved
R200-200
superheat
not
exceeding
13
reducing
improve
transfer
coefficient
(HTC),
maximum
HTC
26
kW/m2K.
growth
elongation
constrained
upstream
reasons
for
reversal.
width,
resulted
fluctuations
pressure
drop
microchannels.
This
complements
understanding
performance,
providing
valuable
insight
optimizing
dissipation
design.
Язык: Английский
Study on internal circulation patterns and heat transfer characteristics of gas-liquid Taylor flow in a gradually expanding microchannel
Chemical Engineering and Processing - Process Intensification,
Год журнала:
2025,
Номер
212, С. 110283 - 110283
Опубликована: Март 21, 2025
Язык: Английский
Heat transfer characteristics of Taylor flow in a bottom-heated square microchannel: A 3D conjugate heat transfer numerical study
Applied Thermal Engineering,
Год журнала:
2025,
Номер
unknown, С. 126509 - 126509
Опубликована: Апрель 1, 2025
Язык: Английский
Taylor bubble splitting, flow and coalescence in branching microchannels: An experimental and numerical simulation study
Chemical Engineering Journal,
Год журнала:
2024,
Номер
486, С. 150231 - 150231
Опубликована: Март 6, 2024
Язык: Английский
Breakup regimes and heat transfer of an isolated bubble and Taylor bubble flow in the T-type microchannel
International Journal of Thermal Sciences,
Год журнала:
2024,
Номер
206, С. 109351 - 109351
Опубликована: Авг. 19, 2024
Язык: Английский
Heat transfer enhancement in a ribbed T-shaped microchannel by oil-water slug flow
Journal of the Taiwan Institute of Chemical Engineers,
Год журнала:
2024,
Номер
162, С. 105577 - 105577
Опубликована: Май 30, 2024
Язык: Английский
An experimental investigation on characteristics of liquid film thickness of gas-liquid Taylor flow in square/rectangular microchannel applied in microreactor
International Journal of Heat and Mass Transfer,
Год журнала:
2024,
Номер
234, С. 126081 - 126081
Опубликована: Авг. 28, 2024
Язык: Английский
Flow and Heat Transfer in Two-Phase Flow Immiscible Droplets in Microchannels
Nanoscale and Microscale Thermophysical Engineering,
Год журнала:
2023,
Номер
28(1), С. 1 - 27
Опубликована: Окт. 24, 2023
The
enhancement
of
heat
transfer
in
microchannels
without
phase
change
is
a
significant
area
study,
primarily
driven
by
the
internal
fluid
recirculation
two-phase
flows.
This
investigation
focuses
on
circular
microchannel,
100
μm
diameter,
where
mineral
oil
droplets
are
introduced
into
water
flow.
study
utilizes
conservative
level
set
method
for
precise
interface
tracking
and
liquid
film
thickness
measurement.
research
introduces
modified
Nusselt
number,
specifically
tailored
to
describe
characteristics
multiphase
delves
effects
varying
droplet
sizes,
from
small
spheres
slug.
findings
indicate
that
most
occurs
with
whose
volume
closely
matches
sphere
fitting
within
channel.
Moreover,
explores
impact
parameters
like
inlet
velocity,
primary-phase
slug
length,
contact
angle.
Notably,
higher
velocities
lead
improved
transfer,
resulting
substantial
increase
number
compared
single-phase
underscores
delicate
balance
between
intensity
capacity
concerning
as
excessive
variations
can
harm
thermal
performance.
It
also
highlights
pivotal
role
surface
wettability,
showing
performance
hydrophobic
surfaces.
Язык: Английский