Frontiers in Energy Research,
Journal Year:
2023,
Volume and Issue:
11
Published: Dec. 29, 2023
The
wake
flow
of
a
circular
cylinder
is
numerically
investigated
by
Large
Eddy
Simulation
(LES)
combined
with
the
Schnerr–Sauer
cavitation
model.
By
comparing
entropy
production
in
presence
or
absence
cavitation,
energy
loss
distribution
field
explored,
shedding
light
on
interactions
between
multiscale
vortex
systems
and
cavitation.
comparative
results
reveal
that,
under
non-cavitating
conditions,
region
near-wake
area
more
concentrated
relatively
larger.
Energy
dissipation
occurs
regions
characterized
very
high
velocity
gradients,
primarily
near
upper
lower
surfaces
leading
edge.
influence
bubbles
predominantly
observed
trailing-edge
(W1)
(W2).
trends
wall
cylinder’s
surface
are
generally
consistent
both
exhibiting
gradients.
Ultrasonics Sonochemistry,
Journal Year:
2025,
Volume and Issue:
114, P. 107278 - 107278
Published: Feb. 16, 2025
Hydrodynamic
cavitation
(HC)
is
widely
found
in
fluid
machinery
and
has
emerged
as
a
significant
technology
several
engineering
fields.
To
investigate
the
erosion
characteristics
caused
by
HC,
experimental
tests
under
varying
conditions
are
conducted
this
study
using
Venturi
test
section
with
different
divergent
angles.
The
qualitative
risk
distributions
represented
through
paint
experiments,
showing
that
increases
angle
decreases.
Subsequently,
Eulerian-Lagrangian
multiscale
model
adopted
to
simulate
HC
section.
This
directly
resolves
large-scale
cavities
volume
of
(VOF)
method
simultaneously
tracks
sub-scale
discrete
bubbles
bubble
(DBM).
A
modified
aggressive
indicator
[Li
et
al.,
Int.
J.
Mech.
Sci.
262,
108,735
(2024)]
incorporated
into
account
for
power
produced
behaviors,
thereby
reproducing
distribution
risks.
Simulations
corresponding
conducted,
results
show
simulated
features
align
well
observations.
Furthermore,
predicted
present
agree
tests,
confirming
reliability
our
model.
Journal of Fluids Engineering,
Journal Year:
2024,
Volume and Issue:
146(6)
Published: Feb. 22, 2024
Abstract
To
simulate
the
microscale
bubble
distribution
and
its
effect
on
high-frequency
cavitation
noise,
we
present
a
two-way
transition
coupling
Euler–Lagrange
model.
The
model
accounts
for
both
cavity
fission
environmental
nucleation
as
sources
of
bubbles,
which
are
limited
in
traditional
mesh-based
Euler
models.
We
evaluate
with
experimental
data
truncated
NACA0009
hydrofoil
well
measured
size
distributions,
showing
satisfactory
results
velocity
distribution,
patterns,
power
law
scalings
size.
Based
an
acoustic
analogy,
find
that
produces
sound
waves
smaller
wavelengths
higher
frequencies
than
model,
mainly
attributed
to
two
factors:
(1)
bubbles
high
natural
frequency
(2)
intense
multiple
collapse/rebound
behavior.
This
is
promising
predicting
full-spectrum
noise.
Physics of Fluids,
Journal Year:
2024,
Volume and Issue:
36(3)
Published: March 1, 2024
Sheet-to-cloud
cavitation
in
a
Venturi
pipe
is
investigated
experimentally
and
numerically
this
work.
The
multiscale
vapor
structures
are
simulated
by
Eulerian–Lagrangian
modeling.
volume
of
fluid
method
with
adaptive
mesh
refinement
employed
to
capture
the
macroscale
cavity
features,
utilizing
large
eddy
simulation
approach.
results
sensitivity
study
demonstrate
that
second-order
capable
capturing
phase
details
shedding
behaviors.
A
comparison
experimental
reveals
mechanisms
different
types
induced
reentrant
jet
shock
wave.
Taking
microscale
bubbles
into
account
using
Lagrangian
approach
achieving
coupling,
including
morphological
evolution
cavities
characteristics
microbubbles,
accurately
reproduced.
features
microbubbles
during
pressure
wave
or
condensation
propagation
well
recognized
changing
rates.
indicate
can
be
categorized
three
types:
jet,
shock,
In
conditions
work,
cycles
found
mainly
(σ
=
1.03),
0.64),
0.39),
respectively,
decrease
number.
Deleted Journal,
Journal Year:
2025,
Volume and Issue:
2(1)
Published: Jan. 7, 2025
Propeller
cavity
bursting,
triggered
by
the
sharp
hull
wake,
can
significantly
increase
broadband
noise.
However,
its
complex
multiscale
nature
presents
substantial
challenges
for
numerical
simulations,
limiting
prediction
accuracy
propeller
cavitation
noise
to
only
first
few
blade-passing
frequencies.
To
overcome
this
limitation,
study
explores
potential
of
a
novel
Euler–Lagrange
hybrid
model
simulating
bursting
and
resulting
Focused
on
benchmark
test
case
INSEAN
E779A
propeller,
results
effectively
reproduce
measured
associated
pressure
fluctuations,
providing
valuable
insights
realistic
simulations
