Modelling Bending Behaviour of Flexible Submerged Vegetation Based on Fluid–Structure Coupling
Ecohydrology,
Journal Year:
2025,
Volume and Issue:
18(2)
Published: March 1, 2025
ABSTRACT
The
bending
behaviour
of
flexible
submerged
vegetation
in
water
flow
has
been
an
important
issue
ecological
hydraulics;
however,
the
understanding
its
laws
is
still
not
in‐depth
enough,
and
a
comprehensive
exploration
governing
parameters
remains
lacking.
To
address
this
gap,
three‐dimensional
numerical
model
based
on
fluid–structure
coupling
was
built
paper
validated
by
experimental
data.
Utilizing
model,
single
various
scenarios
simulated
analysed.
relationships
between
relative
height
(RBH)
critical
variables
such
as
velocity,
radius,
elastic
modulus
submergence
ratio
were
found
fitted
with
different
types
equations.
Through
multiple
regression,
formula
to
estimate
RBH
derived
simulation
results.
established
can
quickly
characterize
state
water,
providing
basis
for
calculating
resistance
contributing
ecological,
engineering
environmental
studies.
Language: Английский
Precise PIV Measurement in Low SNR Environments Using a Multi-Task Convolutional Neural Network
Journal of Marine Science and Engineering,
Journal Year:
2025,
Volume and Issue:
13(3), P. 613 - 613
Published: March 19, 2025
Particle
Image
Velocimetry
(PIV)
is
essential
in
experimental
fluid
mechanics,
providing
nonintrusive
flow
field
measurements.
Among
the
recent
advances
PIV
algorithms,
deep-learning-based
optical
estimation
distinguished
by
its
high
spatial
and
temporal
resolution,
as
well
remarkable
efficiency,
especially
RAFT-PIV,
which
based
on
Recurrent
All-Pairs
Field
Transforms
(RAFT).
However,
RAFT-PIV
extremely
susceptible
to
conditions
characterized
low
signal-to-noise
ratios
(SNR),
leading
unacceptable
errors.
This
study
proposes
PIV-RAFT-EN,
an
enhanced
RAFT-based
algorithm
integrating
image
denoising,
enhancement,
via
a
Multi-Task
Convolutional
Neural
Network
(MTCNN).
Evaluations
synthetic
real-world
low-SNR
data
demonstrate
superior
accuracy
efficiency.
PIV-RAFT-EN
offers
reliable
solution
for
precise
measurements
challenging
environments,
including
practical
applications
like
vehicle
water
entry.
Language: Английский
Coastal Protection for Tsunamis
Journal of Marine Science and Engineering,
Journal Year:
2024,
Volume and Issue:
12(12), P. 2349 - 2349
Published: Dec. 21, 2024
Previous
research
showed
that
a
tsunami
similar
to
the
1755
event
would
inundate
Caxias’
low-ground
areas
in
Oeiras
municipality,
Portugal.
However,
streets
of
downtown
Caxias
were
not
well
reproduced,
which
is
limitation
area’s
mitigation
strategies
and
evacuation
plan.
For
these
reasons,
new
Lidar
data
used
for
first
time
The
local
topography
allowed
construction
more
accurate
DEM,
was
numerical
model
update
improve
inundation
results.
As
complement,
field
survey
conducted
several
locations
assess
coastal
features
protection.
results
show
up
6
m
height
inundated
by
tsunami,
including
residential
area,
road,
railway.
To
stop
waves
from
inundating
areas,
it
proposed
sea
walls
7
third
bridge
over
Barcarena
Stream,
only
pedestrians,
ranging
5
height,
will
serve
as
gate
incoming
waves.
These
protections
should
be
part
strategy
mitigate
overtopping
(winter
storm
surges
tsunamis)
but
also
other
zones.
Language: Английский