Materials,
Journal Year:
2024,
Volume and Issue:
18(1), P. 111 - 111
Published: Dec. 30, 2024
Bimetallic
composite
pipes,
as
critical
components,
effectively
integrate
the
superior
properties
of
diverse
materials
to
meet
growing
demand
for
lightweight,
high-strength,
and
corrosion-resistant
solutions.
These
pipes
find
extensive
applications
in
petrochemical,
power
generation,
marine
engineering,
refrigeration
equipment,
automotive
manufacturing
industries.
This
paper
comprehensively
reviews
advanced
bending
forming
technologies,
with
a
focus
on
challenges
such
wrinkling,
excessive
wall
thinning,
springback,
cross-sectional
distortion,
interlayer
separation.
The
review
combines
theoretical
analysis,
experimental
findings,
numerical
simulations
provide
insights
into
defect
prevention
strategies
process
optimization.
It
also
evaluates
emerging
technologies
artificial
neural
networks
intelligent
control
systems,
which
demonstrate
significant
potential
enhancing
accuracy,
reducing
defects,
improving
efficiency.
Additionally,
this
work
outlines
future
research
directions,
emphasizing
innovations
required
stringent
performance
standards
bimetallic
pipe
components
high-end
applications.
Physics of Fluids,
Journal Year:
2025,
Volume and Issue:
37(3)
Published: March 1, 2025
This
study
systematically
investigates
the
performance
and
internal
flow
field
characteristics
of
387
series
three-stage
electric
submersible
pump
under
varying
viscosities.
By
integrating
experimental
data
with
numerical
simulations,
research
focuses
on
analyzing
effects
medium
viscosity
pump's
hydraulic
performance,
efficiency,
power,
energy
losses.
Additionally,
turbulence
suppression
effect
high-viscosity
conditions
is
thoroughly
examined
through
simulations.
The
results
show
that
as
increases,
both
head
efficiency
decline
significantly,
while
total
entropy
generation
rises
substantially.
Specifically,
drops
from
48.32%
to
3.2%
increases
20
696
mPa·s,
a
notable
rise
in
production.
proportion
due
direct
dissipation
wall
gradually
conditions.
Vortex
structure
analysis
reveals
conditions,
vortex
intensity
weakens
fluid
rotation
decreases,
shear
viscous
become
significantly
stronger,
emerging
primary
sources
loss.
distribution
concentrated
at
inlet
outlet
impeller
blades,
leading
edge
guide
vanes,
near
vane
backplates,
highlighting
dominant
role
These
findings
provide
valuable
theoretical
practical
insights
for
optimizing
enhancing
pumps
high-viscosity.
AIP Advances,
Journal Year:
2025,
Volume and Issue:
15(5)
Published: May 1, 2025
This
study
explores
the
influence
of
viscous
dissipation
and
variable
density
on
heating
efficiency
mass
flux
in
magneto-hydrodynamic
Oldroyd-B
fluid
flow
over
a
polymer
stretching
surface
with
Soret
Dufour
effects.
The
heat
convective
boundary
conditions
are
used
for
increment
thermal
sequence.
To
incorporate
nonlinear
partial
differential
equations
into
standard
scheme,
appropriate
transformation
is
used.
reduced
to
expressions
then
numerically
solved
using
effective
Keller
box
approach.
Newton–Raphson
approach
applied
calculate
unknown
quantities
sheet.
evaluation
controlling
factors,
such
as
Prandtl
quantity
Pr,
Deborah
numbers
β1,
β2,
Biot
number
γ,
mixed
convection
parameter
λ,
magnetic
M,
Eckert
Ec,
distribution,
velocity
profiles
calculated
significantly.
It
observed
that
significant
increase
temperature
evaluated
at
minimal
Pr
=
1.5
but
maximum
value
larger
factor
M
3.5.
Skin
friction
rate
increased
higher
choice
parameter.
Permafrost and Periglacial Processes,
Journal Year:
2025,
Volume and Issue:
unknown
Published: May 14, 2025
ABSTRACT
This
paper
investigates
the
spatiotemporal
dynamics
and
their
changes
of
southern
limit
latitudinal
permafrost
(SLLP)
lower
mountain
(LLMP)
in
Northeast
China,
emphasizing
roles
climate
change
human
activities.
Permafrost
this
region
is
primarily
distributed
northern
parts
Da
Xiao
Xing’anling
ranges
upper
Changbai
Mountains
at
summits
Huanggangliang
part
Mountain
Range.
degradation,
ongoing
since
least
local
Holocene
Megathermal
Period
(8.5–6.0
ka
BP),
has
intermittently
reversed
during
cooler
climatic
intervals
but
continues
to
exert
significant
impacts
on
regional
environments,
infrastructure
stability,
carbon
storage.
Notably,
northward
retreats
SLLP
mid‐19
th
century
underscore
sustained
nature
especially
patchy
zones
increasingly
sensitive
warming
anthropogenic
influences.
LLMP
variability
similarly
shaped
by
a
combination
climatic,
hydrometeorological,
ecological,
topographic
factors.
The
distributions
are
further
complicated
presence
relict
sporadic
permafrost,
as
well
hydrothermal
effects
vegetation
snow
cover.
Addressing
challenges
mapping
modeling
boreal
China
requires
comprehensive
field
investigations,
long‐term
situ
monitoring
via
station
networks,
advanced
numerical
modeling.
Emerging
technologies,
including
satellite
airborne
remote
sensing
(RS),
geographic
information
systems
(GIS),
unmanned
aerial
vehicles
(UAVs),
surface
geophysical
methods,
big
data
analytics,
offer
new
possibilities
for
enhancing
mapping.
Integrating
these
tools
with
conventional
studies
can
significantly
improve
our
understanding
dynamics.
Continued
efforts
monitoring,
technological
innovation,
multidisciplinary
collaboration,
international
cooperation
essential
meet
posed
degradation
changing
climate.
