Hydroelasticity effects induced by a single cavitation bubble collapse
Journal of Fluids and Structures,
Год журнала:
2024,
Номер
127, С. 104131 - 104131
Опубликована: Май 28, 2024
To
investigate
hydroelasticity
effects
on
a
single
cavitation
bubble
dynamic,
focused
laser
was
used
to
generate
the
in
water
near
flexible
aluminium
foil
fixed
specimen
holder
with
circular
aperture
allow
vibrate.
The
generated
below
foil's
center.
A
laser-based
optical
sensor
measured
displacement
at
center
of
foil.
Simultaneously,
high-speed
camera
monitored
bubble's
dynamics
correlate
it
displacement.
By
directly
measuring
displacements,
we
provided
building
block
missing
previous
investigations.
We
found
that
key
difference
between
rigid
and
an
elastic
structure
that,
relative
wall
distances
larger
or
equal
unity,
did
not
collapse
caused
dominant
displacements
during
its
first
growth
(after
plasma
seeding)
subsequent
collapse.
Foil
were
about
twice
as
large
those
phase.
For
lower
distances,
induced
significant
until
third
At
and,
thus,
induce
erosion.
However,
vibrations
therefore,
may
contribute
structural
fatigue
damage.
Our
study
postulates
be
erosive,
however
can
impulsive
loads
causing
thereby
damage
nearby
structures.
Язык: Английский
Numerical investigation of acoustic droplet vaporization and tissue deformation
Mathematics and Computers in Simulation,
Год журнала:
2024,
Номер
225, С. 412 - 429
Опубликована: Июнь 1, 2024
Язык: Английский
Direct Numerical Simulation of Quasispherical Bubble Motion in Ultrasonic Standing Wave Fields
Industrial & Engineering Chemistry Research,
Год журнала:
2024,
Номер
63(44), С. 19274 - 19288
Опубликована: Окт. 22, 2024
To
promote
the
development
of
an
ultrasonic
levitation
technique,
it
is
essential
to
understand
mechanism
bubble
motion
in
standing
wave
fields.
The
trajectory
motion,
position,
and
accompanying
change
surrounding
flow
field
were
investigated.
effects
sound
pressure
amplitude
pa,
acoustic
frequency
f,
radius
Rb,
gravity
level
G/g
on
fully
analyzed.
It
was
found
that
position
y/λ
decreases
with
increase
pa
but
increases
G/g.
chaos
fields
first
then
time
required
for
a
remain
be
steady
f
Based
equilibrium
relationship
between
time-averaged
primary
Bjerknes
force
FBj
buoyancy
Fbuoy,
dimensionless
parameter
X
proposed
determine
whether
or
not
will
levitation,
equation
predict
presented.
Язык: Английский
Numerical investigation on the liquid jet and the dynamics of the near-wall cavitation bubble under an acoustic field
Physics of Fluids,
Год журнала:
2024,
Номер
36(11)
Опубликована: Ноя. 1, 2024
The
dynamics
of
the
near-wall
cavitation
bubble
in
an
acoustic
field
are
fundamental
forms
cavitation,
which
has
been
associated
with
promising
applications
ultrasonic
cleaning,
chemical
engineering,
and
food
processing.
However,
potential
physical
mechanisms
for
cavitation-induced
surface
cleaning
have
not
fully
elucidated.
ultrasonically
driven
numerically
investigated
by
employing
a
compressible
two-phase
model
implemented
OpenFOAM.
corresponding
validation
current
containing
was
performed
comparison
experimental
state-of-the-art
theoretical
results.
Compared
to
state
without
field,
can
enhance
collapse
due
its
stretching
effect,
causing
higher
jet
velocities
shorter
intervals.
velocity
increases
80.2%,
time
reduces
40.9%
compared
those
γ
=
1.1.
In
addition,
effects
stand-off
distances
(γ),
pressure
wave
frequency
(f),
initial
(p*)
on
dynamic
behaviors
were
analyzed
depth.
results
indicate
that
(e.g.,
loads
at
wall
center
maximal
temperature)
weakened
increase
(f)
owing
oscillation
periods.
Furthermore,
maximum
radius
expansion
decrease
increasing
f
p*.
12.6%
when
62.5%
20.5%
p*
74%.
Язык: Английский