Langmuir,
Journal Year:
2024,
Volume and Issue:
40(35), P. 18773 - 18780
Published: Aug. 22, 2024
In
this
paper,
we
develop
a
theory
to
capture
Taylor
dispersion
and
concentration
profiles
of
solute
band
transporting
in
circular
capillary
the
presence
background
active
fluid
flow.
Specifically,
consider
liquids
containing
particles
with
vortex
defects:
under
such
circumstances,
our
recent
calculations
have
revealed
generation
(diffusioosmosis-like)
induced
pressure-gradient-driven
flow
an
axial
gradient
activity
(or
particles).
This
therefore,
captures
transport
activity-gradient-triggered
pressure-driven
flows.
We
obtain
analytical
results
for
overall
velocity,
coefficient
effective
diffusivity),
band.
compare
findings
Hagen
Poiseuille
(having
same
magnitude
pressure
as
flows)
identify
smaller
(and
hence
lesser
spread
bands)
average
velocity
(hence
slower
band–an
effect
that
becomes
more
magnified
at
larger
Peclet
numbers)
case
liquid
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 4, 2025
Self-propelling
active
matter
relies
on
the
conversion
of
energy
from
undirected,
nanoscopic
scale
to
directed,
macroscopic
motion.
One
challenges
in
design
synthetic
lies
control
dynamic
states,
or
motility
gaits.
Here,
an
experimental
system
self-propelling
droplets
with
thermally
controllable
and
reversible
states
is
presented,
unsteady
over
meandering
persistent
arrested
These
are
known
depend
Péclet
number
molecular
process
powering
motion,
which
can
now
be
tuned
by
using
a
temperature
sensitive
mixture
surfactants
as
propulsion
fuel.
The
droplet
dynamics
quantified
analyzing
flow
chemical
fields
for
individual
comparing
them
canonical
models
autophoretic
particles.
In
context
these
models,
situ,
fundamental
first
broken
symmetry
that
translates
isotropic,
immotile
base
state
self-propelled
motility,
experimentally
demonstrated.
Physical Review Letters,
Journal Year:
2024,
Volume and Issue:
132(5)
Published: Feb. 1, 2024
Recently,
there
is
much
interest
in
droplet
condensation
on
soft
or
liquid
liquidlike
substrates.
Droplets
can
deform
and
interfaces
resulting
a
wealth
of
phenomena
not
observed
hard,
solid
surfaces
(e.g.,
increased
nucleation,
interdroplet
attraction).
Here,
we
describe
unique
collective
motion
condensate
water
droplets
that
emerges
spontaneously
when
substrate
covered
with
thin
oil
film.
move
first
serpentine,
self-avoiding
fashion
before
transitioning
to
circular
motions.
We
show
this
self-propulsion
(with
speeds
the
0.1-1
mm
s^{-1}
range)
fueled
by
interfacial
energy
release
upon
merging
newly
condensed
but
smaller
droplets.
The
resultant
spans
multiple
length
scales
from
submillimeter
several
centimeters,
potentially
important
heat-transfer
water-harvesting
applications.
Physical Review Fluids,
Journal Year:
2024,
Volume and Issue:
9(3)
Published: March 27, 2024
Active
drops
through
active
stresses
alter
drop
evaporation
dynamics,
puncture
evaporating
drops,
and
induce
an
inside-out
evaporation.
For
with
vortex
defect,
activity
can
extend
contractile
lifetimes
by
50%
accelerate
extensile
33%.
Non-intuitive
deposition
patterns
emerge
due
to
induced
fluid
flows
where
the
is
dragged
towards
both
outer
newly
formed
inner
contact
lines.
Potential
applications
of
such
include
enhanced
longevity
in
biological
contexts
customizable
thin
film
deposits.
Small,
Journal Year:
2024,
Volume and Issue:
20(33)
Published: April 21, 2024
Liquid
organic
hydrogen
carrier
is
a
promising
option
for
the
transport
and
storage
of
as
clean
energy
source.
This
study
examines
stability
behavior
drops
immobilized
on
substrate
during
an
interfacial
hydrogen-evolution
reaction
(HER)
at
drop
surface
its
surrounding
aqueous
solution.
Hydrogen
microbubbles
form
within
rise
to
apex.
The
growth
rate
in-drop
bubble
increases
with
concentration
reactant
in
medium.
remains
stable
till
buoyancy
acting
large
enough
overcome
capillary
force
external
viscous
drag.
spontaneously
rises
carries
portion
liquid
solution
surface.
These
spontaneous
rising
bubbles
are
detected
measurements
using
high-precision
sensor
placed
upper
solution,
reversing
settling
phase
from
separation
reactive
emulsion.
finding
this
work
provides
new
insights
into
behaviors
many
gas
evolution
reactions
technologies.
Physical review. E,
Journal Year:
2023,
Volume and Issue:
107(2)
Published: Feb. 14, 2023
The
gravitational
settling
of
oil
droplets
solubilizing
in
an
aqueous
micellar
solution
contained
a
capillary
channel
is
investigated.
motion
these
active
reflects
competition
between
and
Marangoni
forces,
the
latter
due
to
interfacial
tension
gradients
generated
by
differences
filled-micelle
concentrations
along
oil-water
interface.
This
studied
varying
surfactant
concentration,
density
difference
droplet
continuous
phase,
viscosity
phase.
force
enhances
speed
when
compared
Hadamard-Rybczynski
prediction
for
(surfactant
free)
Stokes
flow.
can
also
induce
lateral
motion,
suggesting
that
forces
are
not
always
aligned.
decorrelation
rate
(α)
measured
as
initial
slope
velocity
autocorrelation
indicative
extent
which
aligned
during
settling,
examined
function
size:
correlated
(small
values
α)
observed
at
both
small
large
radii,
whereas
significant
occur
limits.
behavior
marked
contrast
dish,
where
increases
with
radius
before
saturating
radius.
A
simple
relation
crossover
maximal
value
α
occurs
proposed.
Physical Review X,
Journal Year:
2024,
Volume and Issue:
14(3)
Published: Sept. 17, 2024
Understanding
the
ability
of
particles
to
maneuver
through
disordered
environments
is
a
central
problem
in
innumerable
settings,
from
active
matter
and
biology
electronics.
Macroscopic
ultimately
exhibit
diffusive
motion
when
their
energy
exceeds
characteristic
potential
barrier
random
landscape.
In
stark
contrast,
wave-particle
duality
causes
electrons
media
come
rest
even
weak—a
remarkable
phenomenon
known
as
Anderson
localization.
Here,
we
present
hydrodynamic
system
with
features,
millimetric
droplet
self-guided
by
its
own
wave
field
over
submerged
topography,
whose
dynamics
exhibits
localized
statistics
analogous
those
electronic
systems.
Consideration
an
ensemble
particle
trajectories
reveals
suppression
diffusion
guiding
extends
topography.
We
rationalize
mechanistically
emergent
virtue
wave-mediated
resonant
coupling
between
which
produces
attractive
about
localization
region.
This
analog,
demonstrates
how
classical
may
localize
like
wave,
suggests
new
directions
for
future
research
various
areas,
including
matter,
localization,
many-body
topological
matter.
Published
American
Physical
Society
2024
Journal of Fluid Mechanics,
Journal Year:
2024,
Volume and Issue:
980
Published: Feb. 8, 2024
For
dissolving
active
oil
droplets
in
an
ambient
liquid,
it
is
generally
assumed
that
the
Marangoni
effect
results
repulsive
interactions,
while
buoyancy
effects
caused
by
density
difference
between
droplets,
diffusing
product
and
fluid
are
usually
neglected.
However,
has
been
observed
recent
experiments
can
form
clusters
due
to
buoyancy-driven
convection
(Krüger
et
al.
,
Eur.
Phys.
J.
E
vol.
39,
2016,
pp.
1–9).
In
this
study
we
numerically
analyse
effect,
addition
propulsion
flow
(with
its
strength
characterized
Péclet
number
$Pe$
).
The
have
their
origin
(i)
droplet
which
Galileo
$Ga$
;
(ii)
(i.e.
filled
micelles)
be
quantified
a
solutal
Rayleigh
$Ra$
.
We
how
attracting
repulsing
behaviour
of
neighbouring
depends
on
control
parameters
find
leads
well-known
repulsion
interacting
reaction
attraction.
At
sufficiently
large
even
collisions
take
place.
Our
further
shows
with
increasing
collision
becomes
delayed.
Moreover,
derive
velocity
Reynolds
$Re_d$
proportional
$Ra^{1/4}/(
\ell
/R)$
where
$\ell
/R$
distance
normalized
radius.
Finally,
obtain
$Re_{rep}$
$PeRa^{-0.38}$
balance
attractive
$Pe\sim
Ra^{0.63}$
agrees
well
transition
curve
regimes
without
collision.
Physical Review Research,
Journal Year:
2024,
Volume and Issue:
6(3)
Published: July 18, 2024
Biomolecular
condensates
help
organize
the
cell
cytoplasm
and
nucleoplasm
into
spatial
compartments
with
different
chemical
compositions.
A
key
feature
of
such
compositional
patterning
is
local
enrichment
enzymatically
active
biomolecules
which,
after
transient
binding
via
molecular
interactions,
catalyze
reactions
among
their
substrates.
Thereby,
biomolecular
provide
a
template
for
nonuniform
concentration
profiles
In
turn,
substrates,
interactions
enzymes,
drive
enzyme
fluxes
which
can
enable
novel
nonequilibrium
dynamics.
To
analyze
this
generic
class
systems,
current
focus
on
self-propelled
droplet
motion,
we
here
develop
self-consistent
sharp
interface
theory.
our
theory,
diverge
from
usual
bottom-up
approach,
involves
calculating
dynamics
based
given
potential
gradient.
Instead,
reminiscent
control
take
reverse
approach
by
deriving
profile
required
to
maintain
desired
condensate
form
The
currents
enzymes
come
corresponding
power
dissipation
rate,
allows
us
derive
thermodynamic
consistency
criterion
passive
part
system
(here,
reciprocal
enzyme-enzyme
interactions).
As
first-use
case
study
role
where
transport
substrates
due
diffusion
is,
in
part,
compensated
redistribution
interactions.
More
generally,
theory
applies
mass-conserved
matter
systems
moving
phase
boundaries.
Published
American
Physical
Society
2024
