International Journal for Numerical Methods in Fluids,
Journal Year:
2024,
Volume and Issue:
96(6), P. 853 - 883
Published: Feb. 12, 2024
Abstract
In
simulations
using
the
particle
finite
element
method
(PFEM)
with
node‐based
strain
smoothing
technique
(NS‐PFEM)
to
simulate
incompressible
flow,
spatial
and
temporal
instabilities
have
been
identified
as
crucial
problems.
Accordingly,
this
study
presents
a
stabilized
NS‐PFEM‐FIC
formulation
an
fluid
free‐surface
flow.
proposed
approach,
(1)
stabilization
is
achieved
by
implementing
gradient
field
in
place
of
constant
over
domains,
handling
direct
nodal
integration;
(2)
increment
calculus
(FIC)
terms
are
added
integration,
three‐step
fractional
step
adopted
update
pressures
velocities;
(3)
novel
slip
boundary
predictor–corrector
algorithm
developed
deal
interaction
between
flow
rigid
walls,
avoiding
pressure
concentration
induced
standard
no‐slip
condition.
The
validated
via
several
classical
numerical
cases
(hydrostatic
test,
water
jet
impinging,
dam
break,
break
on
obstacle).
Comparisons
all
experimental
results
other
solutions
reveal
good
agreement,
demonstrating
strong
ability
solve
high
accuracy
promising
application
prospects.
International Journal for Numerical and Analytical Methods in Geomechanics,
Journal Year:
2023,
Volume and Issue:
47(10), P. 1911 - 1935
Published: May 6, 2023
Abstract
Vacuum‐assisted
prefabricated
horizontal
drain
(PHD)
can
be
used
to
accelerate
the
consolidation
process
of
dredged
mud
slurry
with
high
water
content,
and
this
method
exhibits
advantages
over
traditional
treatment
methods
that
use
vertical
(PVD).
However,
large‐strain
model
simulate
soil
induced
by
vacuum‐assisted
PHDs
is
missing
in
literature,
although
models
for
PVD‐induced
radial
are
abundant.
This
study
presents
a
piecewise‐linear
plane‐strain
drains.
The
called
PCS,
abbreviation
P
lane‐strain
C
onsolidation
S
ettlement.
PCS
account
complex
conditions
including
large
strain,
multiple
layers
PHD
boards,
staged
filling
layers,
varying
spacing
time‐dependent
surcharge
and/or
vacuum
loading,
self‐weight,
nonlinear
compressibility,
hydraulic
conductivity
during
process,
flows,
non‐Darcian
flow.
validated
using
two‐dimensional
Terzaghi's
theory
(small
strain)
large‐scale
laboratory
test
(large
strain),
which
involves
filled
stages,
different
spacings
boards.
Lastly,
proposed
applied
case
conducted
at
Shimokita
Peninsula
(Aomori
Prefecture,
Japan),
where
have
been
treat
duration
330
days.
International Journal for Numerical and Analytical Methods in Geomechanics,
Journal Year:
2024,
Volume and Issue:
48(8), P. 2152 - 2178
Published: March 18, 2024
Abstract
We
attempt
to
formalise
the
relationship
between
poroelasticity
theory
and
effective
medium
of
micromechanics.
The
assumptions
these
two
approaches
vary,
but
both
can
be
linked
by
considering
undrained
response
a
material;
that
is
main
focus
paper.
To
analyse
linkage
micromechanics,
we
do
not
limit
ourselves
original
Biot.
Instead,
consider
multi‐porous
extension
anisotropic
poroelasticity,
where
pore
fluid
pressure
may
vary
within
bulk
interest.
As
consequence,
any
inhomogeneities
in
material
are
necessarily
interconnected;
instead,
they
form
isolated
sets
described
different
poroelastic
parameters
pressures.
incorporate
methods
inside
Biot‐like
investigate
various
microstructures.
show
cases
such
implementation
valid
others
appear
questionable.
During
micromechanical
analysis,
derive
particular
case
cylindrical
transverse
isotropy—commonly
assumed
conventional
laboratory
triaxial
tests—where
symmetry
induced
aligned
cracks.
