Physics of Fluids,
Journal Year:
2024,
Volume and Issue:
36(9)
Published: Sept. 1, 2024
The
study
of
blood
flow
in
curved
arteries
aims
to
understand
how
hemodynamic
behavior
is
affected
by
geometric
factors,
which
crucial
for
revealing
the
formation
and
progression
vascular
diseases.
Currently,
most
studies
on
vessels
have
utilized
computational
fluid
dynamics
software.
Numerical
calculations
typically
concentrated
steady
Newtonian
with
circular
cross
sections,
while
non-Newtonian
has
predominantly
been
calculated
pipes
rectangular
sections.
In
this
paper,
governing
equation
Carreau
a
cerebral
artery
constant
curvature
established
using
curvilinear
coordinate
system,
driven
physiological
pulsatile
pressure
gradient.
Deriving
support
from
finite
difference
method,
numerical
solutions
are
acquired,
whose
convergence
validity
verified.
It
concluded
that
time-averaged
wall
shear
stress
peaks
at
inner
side
artery,
resulting
risk
atherosclerosis,
relative
residence
time
outer
side,
causing
likelihood
infarction
there.
While
an
increase
δ
amplifies
amplitude
both,
it
barely
any
effect
their
values
θ
=
π/2
3π/2.
Time-averaged
Dean
number
first
defined
evaluate
development
secondary
over
cardiac
cycle.
Near
wall,
vessel
escalates
markedly
larger
δ.
This
can
provide
effective
reference
early
prevention
diagnosis
infarction.
Multidiscipline Modeling in Materials and Structures,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 28, 2024
Purpose
This
study
examines
fluid
flow
within
a
rectangular
porous
medium
bounded
by
walls
capable
of
expansion
or
contraction.
It
focuses
on
non-Newtonian
with
Casson
characteristics,
incompressibility,
and
electrical
conductivity,
demonstrating
temperature-dependent
impacts
viscosity.
Design/methodology/approach
The
is
two-dimensional,
unsteady,
laminar,
influenced
small
electromagnetic
force
conductivity.
Hybrid
Analytical
Numerical
Method
(HAN
method)
resolves
the
constitutive
differential
equations.
Findings
fluid’s
velocity
parameter,
viscosity
variation
resistive
force,
while
temperature
affected
radiation
Prandtl
number,
power-law
index.
Increasing
parameter
from
0.1
to
50
results
in
4.699%
increase
maximum
0.123%
average
velocity.
Viscosity
0
15
decreases
1.42%.
Wall
(a
−4
4)
increases
19.07%
1.09%.
100.92%
wall
51.47%
number
change
7.
Originality/value
Understanding
dynamics
various
environments
crucial
for
engineering
natural
systems.
research
emphasizes
critical
role
movements
offers
valuable
insights
designing
systems
requiring
heat
transfer.
presents
new
findings
transfer
channel
two
parallel,
contraction,
which
have
not
been
previously
reported.
Computer Methods in Biomechanics & Biomedical Engineering,
Journal Year:
2025,
Volume and Issue:
unknown, P. 1 - 25
Published: May 1, 2025
A
nano-blood
model
is
developed
to
study
the
flow
of
gold-
and
silver-infused
blood
through
a
porous,
stenotic
artery
under
Newtonian
assumptions.
Wall
curvature,
convective
heating,
wall
motion,
viscous
dissipation
are
considered.
Darcy's
simulates
porous
resistance,
Tiwari-Das
captures
nanoparticle
effects.
Governing
equations
reduced
via
similarity
transformations
solved
using
MATLAB's
bvp4c
solver.
Validation
against
existing
studies
provided.
Results
show
gold-blood
nanofluid
achieves
higher
velocities
than
silver-blood.
Increasing
Biot
number
enhances
cooling
at
arterial
wall.
Detailed
graphs
3D
contour
plots
illustrate
effects
on
temperature,
velocity,
skin
friction,
Nusselt
number.
