Thermally fully developed pipe flows of active liquids
Physics of Fluids,
Journal Year:
2025,
Volume and Issue:
37(3)
Published: March 1, 2025
Active
matter
laden
active
liquids
define
a
unique
class
of
liquids,
whose
extremely
rich
dynamics
can
be
captured
only
by
appropriately
considering
the
contribution
induced
stresses.
In
this
paper,
we
develop
analytical
solutions
for
studying
effect
background
fluid
flow
in
temperature
distribution
and
Nusselt
number
thermally
fully
developed
pipe
with
constant
surface
heat
flux.
Specifically,
consider
an
liquid
consisting
particles
demonstrating
vortex
defects:
consequently,
presence
axial
gradient
activity,
there
occurs
pressure-driven
that
has
profile
different
from
Hagen-Poiseuille
non-active
flow.
We
find
case
is
3.83,
which
smaller
than
classical
value
4.36
observed
(with
flux).
justify
decrease
noting
where
activity
(for
flows)
identical
to
pressure
flows),
overall
strength
flows:
such
reduced
causes
convective
transfer
triggering
flows.
This
also
away
wall
greater
mean
temperature)
Language: Английский
Taylor Dispersion and Concentration Profiles of Solutes in the Capillary Transport of Active Liquids
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
Language: Английский
Nanocapillary Core-Annular Flows of Immiscible Active and Non-Active Liquids Trigger External-Drive-Free Nanofluidic Liquid Transport
Langmuir,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 16, 2025
In
this
paper,
we
develop
analytical
solutions
for
investigating
the
nanocapillary
core-annular
transport
of
an
active
liquid
and
immiscible
non-active
liquid.
The
contains
particles
that
show
vortex
defects,
which
trigger
a
circular
polarization
field,
eventually
enabling
generation
induced
pressure-driven
flow
inside
fluids
in
presence
axial
gradient
activity
(or
concentration
particles).
Here
consider
two
separate
scenarios.
For
first
(second)
case,
occupies
core
(annular)
region
while
annular
(core)
region.
Our
main
finding
is
both
these
cases,
drives
can
achieve
significant
volume
rate
(of
flow)
appropriate
strength
particles);
therefore,
such
nanofluidic
driven
fluid
occurs
with
no
external
driving
(such
as
pressure
or
applied
electric
field).
Also,
greater
thickness
layer
increases
across
entire
but
causes
nonmonotonic
variation
Furthermore,
case
where
core,
larger
active:non-active
viscosity
ratio
significantly
enhances
overall
transport;
however,
other
has
effect.
Finally,
provide
our
results
there
finite
slip
at
walls.
We
find
depending
on
scenario
(active
occupying
region),
different
signs
lengths
have
influences
magnitude
direction
velocity
field
system
Language: Английский
Low Reynolds number flows of active liquids in permeable, long, and thin capillaries
Physics of Fluids,
Journal Year:
2024,
Volume and Issue:
36(9)
Published: Sept. 1, 2024
In
this
Letter,
we
develop
an
analytical
theory
to
study
the
transport
of
active
liquids,
which
contain
and
self-propelling
particles
(with
vortex
defects),
inside
a
long
thin
permeable
capillary
tube.
This
is
triggered
by
pressure
gradient
induced
imposed
in
activity
(or
particle
concentration).
Our
results
show
clear
distinction
radial
axial
velocity
profiles
between
pressure-driven
either
extensile
or
contractile
activity)
non-active
liquids
such
capillaries.
We
also
identify
stream
function
characterizing
liquid
field
tubes.
Language: Английский
Streaming electric field, electroviscous effect, and electrokinetic liquid flows in the induced pressure‐driven transport of active liquids in narrow capillaries
Electrophoresis,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 17, 2024
Abstract
In
this
paper,
we
develop
a
theory
for
studying
the
electrokinetic
effects
in
charged
nanocapillary
filled
with
active
liquid.
The
particles
present
within
liquid
are
self‐driven,
demonstrate
vortex
defects,
and
enforce
circumferentially
arranged
polarization
field.
Under
such
circumstances,
there
is
development
of
an
induced
pressure‐gradient‐driven
transport
dictated
(similar
to
diffusioosmotic
transport)
by
presence
axial
gradient
activity
(or
concentration
particles).
This
pressure‐driven
has
profile
different
from
standard
Hagen–Poiseuille
flow
nanocapillary.
Also,
drives
effects,
which
characterized
generation
streaming
electric
field,
associated
electroosmotic
(EOS)
opposing
flow,
electroviscous
effect.
We
quantify
these
as
functions
dimensionless
parameters
that
vary
inversely
strength
activity‐induced
salt
concentrations.
Overall,
anticipate
paper
will
draw
immense
attention
toward
new
type
phenomena
nanoconfinements.
Language: Английский
Fluid Mechanics, and Its Quantum Developments and Applications
Yi-Fang Chang
No information about this author
European Journal of Theoretical and Applied Sciences,
Journal Year:
2024,
Volume and Issue:
2(5), P. 650 - 667
Published: Sept. 1, 2024
Based
on
the
known
theories
of
fluid
mechanics,
we
research
new
quantum
mechanics
by
operator
method.
Further,
discuss
its
various
developments
combined
extensive
theory
and
other
theories.
Finally,
search
possible
applications
in
some
aspects:
biology
many
systems
are
fluids;
astronomy
binary
stars,
density
wave
evolutionary
direction
spiral
galaxies,
sunspot
researched;
geosciences
earthquake,
formation
basin
hydrocarbon
layer
proposed;
social
sciences
hydrodynamics
corresponding
waves
tides,
synergetics,
corruption,
etc.,
discussed.
Language: Английский
Mean field control of droplet dynamics with high-order finite-element computations
Journal of Fluid Mechanics,
Journal Year:
2024,
Volume and Issue:
999
Published: Nov. 20, 2024
Liquid
droplet
dynamics
are
widely
used
in
biological
and
engineering
applications,
which
contain
complex
interfacial
instabilities
pattern
formation
such
as
merging,
splitting
transport.
This
paper
studies
a
class
of
mean
field
control
formulations
for
these
dynamics,
can
be
to
manipulate
droplets
applications.
We
first
formulate
the
gradient
flows
free
energies
modified
optimal
transport
metrics
with
nonlinear
mobilities.
then
design
an
problem
flows.
As
example,
lubrication
equation
thin
volatile
liquid
film
laden
active
suspension
is
developed,
achieved
through
its
activity
field.
Lastly,
we
apply
primal–dual
hybrid
algorithm
high-order
finite-element
methods
simulate
proposed
problems.
Numerical
examples,
including
formation,
bead-up/spreading,
transport,
merging/splitting
on
two-dimensional
spatial
domain,
demonstrate
effectiveness
mechanism.
Language: Английский