International Journal of Numerical Methods for Heat & Fluid Flow,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 22, 2024
Purpose
This
study
aims
to
investigate
experimentally
and
numerically
the
thermal
analysis
of
a
wavy
diverging-converging
corrugated
enclosure,
partitioned
into
two
parts
under
effect
magnetohydrodynamic
(MHD)
natural
convection.
The
left
part
was
filled
with
Al
2
O
3
/C
H
6
nanofluid,
while
right
saturated
by
porous
medium,
featuring
cylinder
at
center.
system
is
relevant
many
engineering
applications.
Key
factors
affecting
performance,
such
as
nanofluid
volume
fraction,
Darcy
number,
Hartmann
inclination
angle
MHD
Rayleigh
were
analyzed.
evaluated
impact
these
parameters
on
stream
function,
average
Nusselt
number
isothermal
lines
three
heat
source
scenarios:
heating
cylinder,
magnetic
media
walls.
Design/methodology/approach
main
governing
equations
for
flow
are
mass,
momentum
transfer,
modeled
using
Darcy–Brinkmann
model.
These
transformed
dimensionless
form
solved
COMSOL
6.0
based
finite-element
method.
Dynamic
viscosity,
density
conductivity
used
calculate
properties
different
concentrations.
Findings
results
showed
that
increasing
(Ra)
(Da)
increased
55%,
indicating
enhanced
transfer.
A
vertical
(γ
=
90°)
further
improved
performance.
Conversely,
performance
decreased
(Ha).
highest
observed
when
applied
followed
side
nanofluid–porous
contact
lowest
contact.
Experimental
data
demonstrated
presence
field
can
significantly
increase
temperature,
thereby
enhancing
transfer
convection,
particularly
in
region
Originality/value
primary
originality
this
work
lies
use
novel
design
structure
wall.
In
addition,
it
uses
types
fluids
simultaneously,
dividing
enclosure
sections:
contains
mixed
only.
also
includes
its
center
four
undulations.
position
influences
dissipation.
Therefore,
positions
examined:
constant
side.
Scientific Reports,
Год журнала:
2024,
Номер
14(1)
Опубликована: Июнь 19, 2024
Abstract
Natural
convection
in
a
square
porous
cavity
with
partial
magnetic
field
is
investigated
this
work.
The
enters
part
of
the
left
wall
horizontally.
horizontal
walls
are
thermally
insulated.
wave
vertical
on
right
side
at
low
temperature,
while
high
temperature.
Brinkman-Forchheimer-extended
Darcy
equation
motion
utilized
construction
fluid
flow
model
for
media.
Finite
Element
Method
(FEM)
was
used
to
solve
problem’s
governing
equations,
and
current
study
validated
by
comparing
it
earlier
research.
On
streamlines,
isotherms,
Nusselt
numbers,
changes
length,
Hartmann
number,
Rayleigh
number
waves
have
been
examined.
This
paper
will
show
that
negatively
impacts
heat
transmission.
suggests
can
control
transfer
movement.
Additionally,
shown
improved
when
increased.
Journal of Engineering Research,
Год журнала:
2024,
Номер
unknown
Опубликована: Май 1, 2024
In
this
study,
magnetohydrodynamic
(MHD)
natural
convection
flow
investigated
a
large
heat
transfer
trend
in
uniform
magnetic
field
finite
element
approach.
For
verification,
calculation
results
adjusted
high
stream
function,
temperature
distribution,
and
the
average
Nusselt
of
MHD.
This
research
presents
an
innovative
contribution
by
analyzing
corrugated
geometries,
specifically
focusing
on
square-corrugated
(SW)
circle-corrugated
(CW)
configurations.
Additionally,
The
influence
key
parameters
constituting
Hartman
number,
Rayleigh
Darcy
which
largely
affects
velocities,
temperature,
was
accurately
observed
present
study.
To
computationally
resolve,
wave
is
in-stream
behavior
but
has
not
influenced
distribution
or
parameter.
maximum
minimum
value
number
related
to
S
at
Da=10−5
case
1
WC
2,
respectively.
Furthermore,
decreasing
parameter
increases
velocity
u
v
strength
both
cases.
Heat Transfer,
Год журнала:
2024,
Номер
54(1), С. 788 - 830
Опубликована: Окт. 3, 2024
Abstract
The
current
work
extensively
investigates
double‐diffusive
of
nano‐encapsulated
phase
change
material
in
a
thermal
storage
system
partially
filled
with
porous
foam.
generation
irreversibilities
and
the
influence
Soret/Dufour
magnetohydrodynamic
effects
are
also
considered.
circular
cold
cavity
contains
corrugated
hot
cylinder
covered
by
an
annular
considered
parameters
Rayleigh
number
(10
3
–10
5
),
fusion
temperature
(0.1–0.9),
Stefan
volume
concentration
nanoparticles
(0–0.05),
Darcy
−4
−1
).
Hartmann
(0–80)
undulations
inner
(3–9).
numerical
analysis
has
exploited
finite
element
approximations.
results
indicate
that
numbers
greatly
fluid
flow,
isotherms,
concentrations
melting/solidification
region.
great
on
region
while
there
is
no
evident
isotherms
where
both
Nusselt
Sherwood
around
5%
number.
In
contrast,
values
decreased
30%
decreasing
Da
from
0.1
to
10
.
Furthermore,
very
low
heat
transfer,
mass
transfer
