Journal of Taibah University for Science,
Journal Year:
2024,
Volume and Issue:
18(1)
Published: Dec. 11, 2024
Magnetohydrodynamics
(MHD)
mixed
convection
of
non-Newtonian
power-law
fluid
for
laminar
flow
inside
a
ventilated
square
cavity
with
an
inner
rotating
heated
cylinder
is
studied
numerically
using
the
Galerkin
weighted
residual
finite
element
method
(GFEM).
The
left
vertical
wall
has
inlet
port
at
its
top,
while
right
outlet
bottom.
Several
significant
parameters,
including
Hartman
number
(0≤Ha≤80),
Prandtl
(20≤Pr≤100),
Reynolds
(100≤Re≤400),
index
(0.6≤n≤1.4),
angular
rotational
velocity
(ω=−20,0,20),
and
magnetic
field
inclination
angle
(0∘≤γ≤120∘)
on
investigated.
Streamlines,
isotherms,
local
Nusselt
numbers
(Nu),
average
(Nu¯),
sensitivity
analysis,
other
numerical
representations
results
are
provided.
research
showed
that
when
aligned
parallel
to
gravitational
(γ=90∘),
heat
transfer
rate
increases,
buoyancy
force
leads
process.
In
clockwise
condition
(ω=20),
increases
by
69.84%
Re
rises
from
100
400.
relation
between
Nu¯
inversely
proportional
in
all
three
conditions
cylinder.
cylinder's
anticlockwise
directions,
as
Hartmann
0
80.
When
also
A
analysis
variance
(ANOVA)
been
performed
this
study.
Physics of Fluids,
Journal Year:
2024,
Volume and Issue:
36(7)
Published: July 1, 2024
This
research
deals
with
the
intricate
dynamics
of
double
diffusive
thermogravitational
convection
within
a
convex
U-shaped
porous
chamber
and
sheds
light
on
use
radiative
ternary
hybrid
nanoliquid.
In
this
configuration,
lower
flat
boundary
is
assumed
to
be
thermally
hot
densely
concentrated
while
curved
lateral
boundaries
remain
cold
dilute.
The
other
enclosure
are
kept
under
adiabatic
conditions.
governing
Navier–Stokes
equations
along
thermal
species
effectively
solved
by
employing
higher
order
compact
technique.
developed
in-house
program
has
been
rigorously
verified
against
experimental
computational
benchmark
results.
meticulously
examines
impact
several
pivotal
parameters,
including
Lewis
number
(1≤Le≤20),
buoyancy
ratio
(0≤N≤10),
Darcy
(10−4≤Da≤10−2),
Rayleigh
(104≤Ra≤106),
volumetric
heat
source/sink
coefficient
(−10≤q≤10),
radiation
parameter
(1≤Rd≤5),
aspect
(0.2≤AR≤0.6),
solid
particles
concentration
(0.0≤ϕthnp≤0.04)
nanofluid.
findings
eloquently
portrayed
through
graphical
representations
showcasing
streamlines,
iso-solutals,
isotherms,
dimensionless
Nusselt
(Nuavg)
Sherwood
(Shavg)
parameters.
Our
investigation
demonstrates
that
nanofluid
outperforms
both
mono
nanofluids
in
facilitating
diffusion
processes.
Moreover,
optimal
transfer
efficiency
achieved
conditions
characterized
an
AR
=
0.2,
Ra=106,
Da=10−2,
N
10,
Le
1,
volume
fraction
ϕthnp=0.04.
International Journal of Thermofluids,
Journal Year:
2023,
Volume and Issue:
21, P. 100546 - 100546
Published: Dec. 14, 2023
The
cross-diffusion
via
Soret
and
Dufour
impacts
on
natural
convection
in
an
L-shaped
enclosure
full
of
multi-walled
carbon
nanotubes
(MWCNTs)-H2O
(water)
nanofluids
has
been
studied
numerically
utilizing
the
multiple-relaxation-time
(MRT)
lattice
Boltzmann
method
(LBM)
through
graphics
processing
unit
(GPU)
computing.
indented
part
L-shape
is
cold
(Tc),
while
left
bottom
walls
chamber
maintain
a
heated
(Th)
temperature.
adiabatic
boundary
condition
present
cavity's
remaining
walls.
thermal
conductivity
viscosity
are
function
fluid
temperature,
corresponding
correlation
was
derived
from
experimental
data.
current
methodology
data
based
outcomes
wholly
noble.
Numerical
simulations
have
done
for
numeroust
relevant
pertinent
such
as
Rayleigh
number,
3×103≤Ra≤3×105,
buoyancy
ratio,
−2≤Br≤2,
volume
fraction,
0.0≤ϕ≤0.01,
0.0≤Sr≤0.2,
0.0≤Df≤0.2,
Prandtl
Pr=6.2,
Lewis
Le=2
fixed.
results
presented
regarding
streamlines,
isotherms,
isoconcentration,
velocity
temperature
distribution,
local
Nusselt
average
Sherwood
total
entropy
production.
It
discovered
that
with
growing
numbers,
fractions,
Nu¯
Sh¯
rise.
For
various
numbers
Ra
=
(3×103,
3×104,
3×105),
grew
by
29.95%,
19.86%,
1.77%
respectively
when
ϕ
increased
0.0
to
0.01.
graph
reaches
its
maximum
Ra=3×105.
streamlines
grow
enhances.
In
addition,
fraction
rises
0.02,
Nu
because
more
potent
conductivity,
but
Sh
falls.
highest
formation
found
Ra=(3×105),
general
rate
improves
enlarged
Bejan
number
stays
constant.
Finally,
response
surface
analysis
done,
output
closely
matches
original
simulation
results.
International Journal of Modelling and Simulation,
Journal Year:
2024,
Volume and Issue:
unknown, P. 1 - 30
Published: April 9, 2024
This
study
aims
to
numerically
examine
the
heat
transfer
and
entropy
generation
of
non-Newtonian
power-law
nanofluids
in
a
C-shaped
cavity
filled
with
porous
media
considering
Brinkman-Forchheimer
extended
Darcy
model
(BFEDM).
The
graphics
processing
unit
(GPU)
based
multiple-relaxation-time
lattice
Boltzmann
method
(MRT-LBM)
was
used
through
computing
unified
device
architecture
(CUDA)
C/C++
platform.
It
is
known
fact
that
fluid
viscosity
varies
shear
rate
nanoparticle
sizes
thermal
conductivity
also
temperature.
However,
extension
such
phenomena
needs
be
further
investigated
understand
any
specific
threshold
application.
To
leverage
characteristics,
it
permissible
add
certain
input
parameters.
As
result,
indices
(n),
number
(Da),
volume
fraction
nanoparticles
(ϕ),
Rayleigh
(Ra),
fixed
porosity
(ε=0.4)
were
five
key
parameters
considered
analyze
numerical
results.
GPU-based
code
validated
available
benchmark
results,
good
agreements
obtained.
results
showed
average
terms
Nusselt
(Nu‾)
increased
due
an
increase
Ra
enhanced
buoyancy
force
reduction
.
Numerical Heat Transfer Part B Fundamentals,
Journal Year:
2024,
Volume and Issue:
unknown, P. 1 - 22
Published: Jan. 3, 2024
Heat-exchanging
devices
equipped
with
conventional
thermal
fluids
are
failing
to
meet
the
standard
in
terms
of
efficiency.
The
inclusion
nanoparticles
within
a
base
fluid
improve
efficiency
can
be
great
alternative
but
proper
understanding
on
interactions
during
heat
transfer
phenomena
is
required.
This
work
examines
between
conduction
and
convection
nanofluid
water
copper
(Cu)
particles.
investigation
focuses
behavior
nanofluid,
considering
impact
magnetohydrodynamics
(MHDs)
flow
over
vertical
surface.
governing
equations
were
non-dimensionalized
by
suitable
transformation
then
solved
numerically
implicit
finite
difference
method
(FDM).
key
findings
suggested
that
increasing
magnetic
parameter
plummeted
skin
friction
coefficient
accelerated
dissipation
up
5%−10%
augmenting
peaks
velocity
as
well
temperature
under
constant
volume
fraction
nanoparticles.
In
addition,
boundary
layer
thickness
also
increased
concurrently.
Alternatively,
when
non-zero
was
considered,
allowed
vary,
convective
got
enhanced.
from
this
study
will
assist
relevant
industry
identify
Cu
presence
field
order
achieve
best
efficacy
heat-exchanging
unit.
