Physics of Fluids,
Journal Year:
2024,
Volume and Issue:
36(12)
Published: Dec. 1, 2024
Under
specific
cavitating
flow
conditions,
the
collapse
of
cavitation
structures
near
bluff
body
surface
can
trigger
intense
pressure
pulsations,
resulting
in
severe
vibration
and
noise.
To
effectively
control
damage
caused
by
structures,
this
study
investigates
field
around
a
cylinder
using
compressible
numerical
simulation
method
based
on
implicit
large
eddy
simulation.
This
work
is
first
to
examine
effects
placing
micro-protrusions
cylinder.
The
results
show
that
wall-attached
separation
point
main
cause
induced
vibrations
height
location
are
key
factors
controlling
cylinder's
shear
layer.
It
recommended
position
protrusions
approximately
5°
upstream
point,
with
protrusion
entering
at
least
logarithmic
region
boundary
Appropriately
placed
block
reverse
flow,
reducing
volume
involved
overall
intensity,
thereby
diminishing
load
impact
surface.
Physics of Fluids,
Journal Year:
2024,
Volume and Issue:
36(5)
Published: May 1, 2024
We
experimentally
investigated
a
passive
cavitation
control
approach
to
partial
and
cloud
on
National
Advisory
Committee
for
Aeronautics
0015
hydrofoil.
For
this
approach,
we
implemented
two
different
kinds
of
mesoscale
bio-inspired
riblets,
known
as
scalloped
riblets
sawtooth
the
suction
side
hydrofoil
near
its
leading
edge.
studied
dynamics
with
without
using
high-speed
camera.
In
addition,
performed
hydro-acoustic
measurements
analyze
effects
induced
noise
in
wake
hydrofoils.
considered
flows
at
Reynolds
numbers
0.5
×
106
0.6
hydrofoils
angles
attack
8°
10°.
Results
revealed
that
shedding
surface
was
mitigated
significantly
due
reduction
re-entrant
jet
momentum.
Also,
influence
tip
vortex
reduced
modified
Furthermore,
large-scale
unmodified
located
mostly
lower
frequency
range
30
Hz,
which
similar
cavity
frequency.
The
small-scale
vortex-induced
concentrated
relative
higher
between
100
120
Hz.
study
achieved
by
low
domain
some
cases
manipulating
oscillation
mechanism
elimination
structure.
This
provided
new
insight
into
controlling
destructive
should
be
relevant
various
engineering
applications.
Journal of Marine Science and Engineering,
Journal Year:
2024,
Volume and Issue:
12(3), P. 423 - 423
Published: Feb. 27, 2024
In
this
work,
we
conducted
a
numerical
study
on
the
cavitation
flow
around
circular
cylinder
with
Re=200
and
σ=1,
through
implementation
of
porous
coating.
The
primary
objective
addressed
effectiveness
utilizing
surface
to
control
cavitation.
We
analyzed
dynamics
hydrodynamic
performance
at
different
permeability
levels
surfaces
(K=10−12−10−10).
was
governed
by
density-based
homogeneous
mixture
model,
volume
penalization
method
used
deal
layer.
A
high-order
compact
adopted
for
simulation
cavitating
solving
preconditioned
multiphase
equations.
findings
demonstrated
that
fluctuations
in
lift
coefficient
decreased
when
layer
applied.
However,
it
is
not
possible
precisely
express
an
opinion
about
drag
because
may
vary,
either
increasing
or
decreasing,
depending
within
constant
thickness
results
revealed
application
led
effective
suppression
vortex
shedding.
addition,
reduction
shedding
frequency
obtained,
which
accompanied
thinner
elongated
vortices
wake
region
cylinder.
With
proper
layer,
inception
suppressed,
amplitude
pressure
pulsations
due
mechanism
mitigated.
Physics of Fluids,
Journal Year:
2025,
Volume and Issue:
37(2)
Published: Feb. 1, 2025
In
this
study,
we
directly
monitored
the
collapse
dynamics
of
a
single
cavitation
bubble
induced
by
laser-generated
plasma
near
biomimetic
mesotextured
boundary
placed
in
distilled
water
via
shadowgraphy
technique.
Comparing
mechanism
plain
solid
surface
with
one
allowed
to
investigate
effects
on
control
at
various
relative
wall
distances.
The
results
show
that
microjet
toward
during
first
is
manipulated
when
replaced.
No
substantial
impact
was
observed.
This
from
fact
mitigated
stage
collapse.
Moreover,
second
phase
collapse,
no
toroidal
structures
attached
are
formed
different
addition,
and
stages
modified
happened
earlier
than
collapses
most
Furthermore,
equivalent
radius
for
compared
Langmuir,
Journal Year:
2025,
Volume and Issue:
unknown
Published: May 1, 2025
Cavitation-induced
erosion
presents
major
problems
for
hydraulic
and
marine
systems
due
to
the
collapse
of
bubbles
near
solid
boundaries.
This
work
investigates
a
passive
control
technique
employing
microstructured
rough
surface
reduce
erosion.
High-speed
imaging
studies
were
performed
analyze
dynamics
single
bubble
induced
by
laser-generated
plasma
microscale
smooth
surface.
The
bubble's
equivalent
radius
was
investigated
over
time
three
varying
relative
wall
distances,
its
behavior
assessed
specific
phases:
growth,
collapse,
rebound.
adjacent
demonstrated
symmetrical
formed
toroidal
structures
affixed
wall,
in
accordance
with
established
bubble-wall
interaction
phenomena
documented
prior
research.
surface,
on
other
hand,
caused
an
asymmetric
rebound,
causing
counter-jet
form
that
moved
away
from
divergence
anticipated
symmetric
indicated
roughness
substantially
influences
dynamics,
diminishing
microjet
momentum
associated
cavity
size,
thus
alleviating
These
results
provided
innovative
perspectives
cavitation
strategies
through
modification.
