A coupled LBM-LES-DEM particle flow modeling for microfluidic chip and ultrasonic-based particle aggregation control method
Applied Mathematical Modelling,
Год журнала:
2025,
Номер
unknown, С. 116025 - 116025
Опубликована: Фев. 1, 2025
Язык: Английский
Constructal design of a rectangular porous fin considering minimization of maximum temperature difference and pumping power consumption
Science China Technological Sciences,
Год журнала:
2023,
Номер
67(3), С. 919 - 929
Опубликована: Дек. 6, 2023
Язык: Английский
Constructal design of printed circuit recuperator for S-CO2 cycle via multi-objective optimization algorithm
Science China Technological Sciences,
Год журнала:
2023,
Номер
67(1), С. 285 - 294
Опубликована: Дек. 6, 2023
Язык: Английский
Constructal design of a rectangular parallel phase change microchannel in a three-dimensional electronic device
Science China Technological Sciences,
Год журнала:
2023,
Номер
67(5), С. 1381 - 1390
Опубликована: Дек. 8, 2023
Язык: Английский
Enhanced mixing efficiency and reduced droplet size with novel droplet generators
Scientific Reports,
Год журнала:
2024,
Номер
14(1)
Опубликована: Фев. 27, 2024
Abstract
Nowadays,
droplet
microfluidics
has
become
widely
utilized
for
high-throughput
assays.
Efficient
mixing
is
crucial
initiating
biochemical
reactions
in
many
applications.
Rapid
during
formation
eliminates
the
need
incorporating
micromixers,
which
can
complicate
chip
design.
Furthermore,
immediate
of
substances
upon
contact
significantly
improve
consistency
chemical
and
resulting
products.
This
study
introduces
three
innovative
designs
generators
that
achieve
efficient
produce
small
droplets.
The
T-cross
cross-T
geometries
combine
cross
T
junction
mechanisms,
improved
efficiency.
Numerical
simulations
were
conducted
to
compare
these
novel
with
traditional
junctions
terms
index,
diameter,
eccentricity.
geometry
exhibited
highest
index
produced
smallest
For
flow
rate
ratio
0.5,
this
offered
a
10%
increase
decrease
diameter
by
compared
junction.
While
best
efficiency
among
generators,
it
produces
larger
droplets,
risk
contamination
due
microchannel
walls.
Therefore,
highly
desirable
most
applications
its
production
considerably
smaller
asymmetric
8%
around
2%
conventional
0.5.
All
demonstrated
comparable
lowest
droplets
(around
1%).
Thus,
geometries,
particularly
geometry,
are
favorable
choice
where
both
high
sizes
important.
Язык: Английский
Optimization of passive micromixers: effects of pillar configuration and gaps on mixing efficiency
Scientific Reports,
Год журнала:
2024,
Номер
14(1)
Опубликована: Июль 15, 2024
Chemical
bioreactions
play
a
significant
role
in
many
of
the
microfluidic
devices,
and
their
applications
biomedical
science
have
seen
substantial
growth.
Given
that
effective
mixing
is
vital
for
initiating
biochemical
reactions
applications,
micromixers
become
increasingly
prevalent
high-throughput
assays.
In
this
research,
numerical
study
using
finite
element
method
was
conducted
to
examine
fluid
flow
mass
transfer
characteristics
novel
featuring
an
array
pillars.
The
utilized
two-dimensional
geometries.
impact
pillar
configuration
on
performance
evaluated
concentration
distribution
index
as
key
metrics.
explores
effects
design
pressure
drop,
drawing
from
principles
such
contraction-expansion
split-recombine.
Two
configurations
arrays,
slanted
arrowhead,
are
introduced,
each
undergoing
investigation
regarding
parameters
diameter,
gap
size
between
groups,
distance
pillars,
vertical
shift
groups.
Subsequently,
optimal
identified,
exhibiting
efficiency
exceeding
99.7%
at
moderate
Reynolds
number
(Re
=
1),
level
typically
challenging
attain
high
efficiency.
Notably,
drop
remains
low
1102
Pa.
Furthermore,
variations
over
time
across
different
positions
along
channel
examined.
Both
demonstrate
short
lengths
times.
At
4300
μm
inlet,
arrowhead
yielded
indices
97.2%
98.9%,
respectively.
could
provide
99.5%
channel's
end
within
8
s.
Additionally,
both
exceeded
90%
by
3
combination
rapid
mixing,
length
highly
promising
applications.
Язык: Английский
Comparative Analysis of Flow behavior During the nanofluid Phase Transition at Serpentine Microchannel Bends
Chemical Engineering and Processing - Process Intensification,
Год журнала:
2025,
Номер
unknown, С. 110298 - 110298
Опубликована: Апрель 1, 2025
Язык: Английский
Characterization of the oil water two phase flow in a novel microchannel contactor equipped with helical wire static mixer
Scientific Reports,
Год журнала:
2024,
Номер
14(1)
Опубликована: Окт. 8, 2024
This
study
investigates
an
oil/water
two-phase
system
to
assess
the
potential
efficacy
of
a
novel
passive
mixer
in
enhancing
liquid-liquid
interfacial
area
within
micro-channel
contactor.
In
this
system,
two
fluids
are
introduced
into
microchannel
with
diameter
800
μm
and
length
20
cm,
which
is
equipped
stainless-steel
helical
wire
measuring
250
diameter.
Throughout
experiments,
both
supplied
at
equal
flow
rates,
dominant
forces,
including
attachment
detachment
examined.
The
results
reveal
critical
Weber
number
3.8
×
10
Язык: Английский
Numerical investigation of mixing efficiency in Janus micro-mixer using lattice Boltzmann method
Physics of Fluids,
Год журнала:
2023,
Номер
35(7)
Опубликована: Июль 1, 2023
Droplet
micro-mixing
is
a
critical
aspect
limiting
the
accuracy
of
chemical
analysis
and
quality
drug
screening,
requiring
efficient
mixing
target
concentrations
in
limited
volume.
In
this
paper,
ternary
dilute
solute
lattice
Boltzmann
model
used
to
study
processes
mechanisms
solutes
inside
Janus
droplets.
The
influence
three
factors
including
droplet
velocity,
tilt
angle
volume
ratio
on
efficiency
examined.
results
show
that
there
main
circulation
“dead
zone”
droplet.
With
increasing
both
intensity
occupied
increase,
which
make
increase.
At
different
angles,
difference
strength
internal
flow
field
makes
“windward
part”
greater
than
“leeward
part.”
When
keeping
r-phase
constant
g-phase,
diffusion
distance
shortened
reduced.
competes
with
reinforcing
effect
field,
finally
shows
tendency
larger
r:
g,
faster
mix
complete.
will
provide
theoretical
support
for
further
improvement
micro-mixer
efficiency.
Язык: Английский
Effect of Microchannel Curvature on Water Droplet Dynamics in a Highly Viscous Flow
Industrial & Engineering Chemistry Research,
Год журнала:
2024,
Номер
63(31), С. 13881 - 13894
Опубликована: Июль 25, 2024
This
work
is
dedicated
to
the
three-dimensional
(3D)
computational
fluid
dynamics
(CFD)
simulations
of
microchannel
curvature
effect
on
water
droplet
in
a
highly
viscous
flow.
Dynamics
10
μm
droplets
bitumen
medium
flowing
through
U-shaped
tubes
square-cross-section
and
h
=
40
width
investigated.
The
channel
radius
R
varies
from
0.25h
2h
inlet
Reynolds
number
Rein
2
10.
coupled
level-set
volume
(CLSVOF)
methods
are
combined
with
adaptive
mesh
refinement
(AMR)
technique
accurately
simulate
flow
regime.
Different
geometry
performances
compared
using
one-dimensional
(1D)
diagrams
for
integral
characteristics
3D
visualization
liquid–liquid
interface.
Flows
vicinities
convex
concave
walls
found
control
deformation
breakup
patterns.
results
reveal
that
at
≥
7,
causes
temporary
coalescence
associated
formation
long
worm-shaped
droplets.
Differently
positioned
each
Rein,
bend
radius,
interfacial
tension
cases
assessed
individually.
As
result,
behavior
map
developed
based
local
capillary
numbers.
Язык: Английский