Proceedings of the Institution of Mechanical Engineers Part N Journal of Nanomaterials Nanoengineering and Nanosystems,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 1, 2024
A
computational
study
on
the
effect
of
magnetohydrodynamic
mixed
convection
nanofluid
flow
in
a
square
split
lid
driven
cavity
with
block
placed
near
bottom
wall
is
undertaken.
Two
different
nanoparticles
gold
and
alumina
are
considered
for
study.
The
observations
obtained
by
solving
non-dimensionalized
governing
equations
Finite
Element
Method
variational
approach
as
accessible
FreeFEM++
software.
results
Prandtl
numbers
(
Pr),
Richardson
number
Ri),
volume
fractions
[Formula:
see
text],
Reynolds
(Re),
MHD
parameters
(M)
displayed
through
graphs
figures.
It
has
been
observed
that
pressure
distribution
significantly
increases
increment
but
both
behave
differently.
magnetic
field
enhancement
M
=
0.1,
0.2,
0.5
0.9)
decreases
velocity
within
cavity.
convective
heat
transfer
faster
case
Re)
100
than
14
or
21.
And
also
increasing
Number
from
0.1
to
1.0,
average
Nusselt
shows
∼9.5%
Ri
1.0
10.0,
an
∼3%
whereas
decrement
higher
Re
21,
100)
Gold
Allumina
respectively.
present
simulations
have
various
applications
natural
phenomenon
like
climate
control,
meteorological
geophysical
activities
industrial
cooling
electronics
equipment,
exchanger.
REVIEWS ON ADVANCED MATERIALS SCIENCE,
Год журнала:
2024,
Номер
63(1)
Опубликована: Янв. 1, 2024
Abstract
This
work
examines
the
behaviour
of
flow
and
heat
transmission
in
presence
hybrid
nanofluid
thermal
radiation,
generation,
magnetohydrodynamics.
The
state
this
model
is
represented
by
two
different
fluids,
TiO
2
(titanium
dioxide)
Ag
(silver).
enclosure
wavy
slanted,
with
curving
walls
on
left
right.
finite
difference
approximation
method
was
utilized
to
resolve
fundamental
equations
after
they
were
non-dimensionalized,
which
are
further
reduced
a
fourth-order
bi-harmonic
equation
numerically
solved
based
biconjugate
gradient-stabilized
approach
method.
simulations
performed
various
Rayleigh
numbers,
Hartmann
an
inclination
angle
enclosure,
radiation
parameters,
generation
magnetic
field,
volume
fraction
nanoparticles.
streamlines,
isotherms,
average
Nusselt
number
contours
used
depict
thermo-fluid
patterns.
findings
show
that
relies
ϕ
increases
as
rises.
investigation’s
demonstrated
transfer
heated
bottom
wall
significantly
(Ra
=
10
5
6
).
At
cavity
45°,
interesting
multi-vortex
structures
observed.
results
study
may
enhance
effectiveness
solar
collectors,
exchangers,
other
similar
systems
depend
convective
nature.
South African Journal of Chemical Engineering,
Год журнала:
2024,
Номер
49, С. 295 - 312
Опубликована: Июнь 13, 2024
The
heat
transfer
by
natural
convection
of
a
nanofluid,
which
is
ethylene
glycol−Al2O3
has
been
analyzed
in
an
open
cavity
numerically
using
the
multiple-relaxation-time
-
lattice
Boltzmann
method
graphics
processing
unit
high-performance
parallel
computing.
right
side
open,
and
different
boundary
conditions
have
applied
to
all
walls.
Besides,
one
adiabatic
fin
installed
on
each
enclosure's
top
bottom
sides.
Here,
Prandtl
number
fixed
at
16.6,
Rayleigh
changes
from
104−106
with
nanoparticle
volume
fraction
0%−5%
used
for
numerical
simulations.
this
work,
power-law
index
important
parameter
as
well,
0.7,
0.8,
1,
1.2,
1.4
are
values
parameter.
Results
presented
concerning
both
average
local
Nusselt
numbers
form
streamlines,
isotherms,
temperature
distributions,
velocity
rate,
entropy
production.
It
observed
when
increases,
increases
607.94%,
reason,
overall
rate
rises
because
buoyancy
force.
In
addition,
falls
83.28%
rises;
result,
total
fluid
viscosity
index.
also
that
shear-thickening
fluids,
gradient
higher.
On
contrary,
started
decreasing
increase
Additionally,
value
falls.
Moreover,
7.08%
increases.
intensity
force
reduces
fraction.
generation
increase,
but
it
decreases
So,
106,
0.00
then
highest.
This
current
research
many
applications
example
exchangers,
electronic
cooling
equipment,
solar
heating
systems,
aerospace
applications,
medical
devices,
generation-related
systems.
Partial Differential Equations in Applied Mathematics,
Год журнала:
2024,
Номер
10, С. 100667 - 100667
Опубликована: Март 23, 2024
This
numerical
analysis
investigates
the
behavior
of
magnetohydrodynamics
(MHD)
thermosolutal
convection
in
a
hybrid
nanofluid
made
up
multi-wall
carbon
nanotube
(MWCNT)-Fe3O4
and
water
along
vertical
wavy
surface
with
wall
heat
mass
flux
conditions.
The
mathematical
model
is
developed
using
conservation
equations
mass,
momentum,
energy,
energy.
governing
are
converted
into
non-dimensional
form
appropriate
transformation,
implicit
finite
difference
technique
used
to
solve
them.
effects
various
parameters,
such
as
Schmidt
number
(Sc),
nanoparticles
volume
fraction
(ϕ),
amplitude
(a),
magnetic
parameter
(M),
buoyancy
ratio
(Br),
on
velocity,
temperature,
concentration
distribution
(Φ),
streamlines,
isotherms,
local
skin
friction
coefficient
(Cf),
Nusselt
(Nu)
number,
Sherwood
(Sh)
investigated.
Results
show
that
higher
addition
nanofluids
slow
down
transport
rate,
indicated
by
declining
numbers.
However,
enhancing
increases
fluid
flow's
friction,
heat,
transport.
distribution,
convective
within
weakened
M.
Abstract
In
this
study,
a
steady-state
forced
convection
heat
transfer
(HT)
of
air
flow
in
two-dimensional
channel
with
circular
cross-section
is
numerically
investigated.
The
analysis
considers
two
sources
at
uniform
temperatures
along
the
lower
surface
mini-channel,
upper
remaining
adiabatic
to
facilitate
energy
exchange.
are
placed
distances
L
1
=
3.5
m
and
2
1.5
on
bottom
surface.
finite
element
method
used
solve
momentum-energy
equations
using
Computational
fluid
dynamics
(CFD)
software,
under
constant
variable
properties.
HT
rates
computed
for
Reynolds
numbers
(Re
≤
2,000)
Prandtl
number
(Pr
0.713).
study
evaluates
effects
number,
thermo-physical
properties,
thermal
boundary
conditions
hydrodynamic
behavior.
Results
show
that
changes
Nusselt
significantly
influenced
by
Re
source
configuration,
rate
increases
highlighting
notable
differences
centerline
temperature,
velocity,
conductive
flux
wall
maximum
difference
14%
T
20°C.
Pressure
also
decreases
increasing
shows
good
agreement
between
CFD
results
empirical
Shah
equation.
Results in Engineering,
Год журнала:
2024,
Номер
23, С. 102533 - 102533
Опубликована: Июль 14, 2024
Sustainable
energy
solutions
are
necessary
in
the
current
manufacturing
advancements,
where
a
need
is
being
pressed
upon
biomaterial-based
processes.
This
study
examines
aerodynamics
of
wood
chip
biomass
fluidized-bed
reactors,
an
essential
aspect
sustainable
fuel
technologies.
Through
experimental
investigations,
methodology
determined
minimum
fluidization
rates
for
particles
four
distinct
sizes
and
compared
these
with
theoretical
prediction-based
calculations.
A
novel
laboratory
setup
featuring
Differential
Pressure
Feedback
Exhaust
gas
recirculation
(DPFE)
sensor
system
was
developed
to
measure
processes
continuously
advance
enhancements
precision
reliability
findings.
Key
results
include
successful
adaptation
Ergun
equation
chips,
herewith
accommodating
observed
deviations
pressure
drops
within
specific
ranges.
adaptation,
along
real-time
data
tracking
air
phase
changes
using
multifunction
measuring
device,
revealed
critical
insights
into
turbulence
patterns
particle
movement.
These
findings
consistent
models
underscore
potential
optimize
use
reactors.
The
study's
also
contribute
significantly
field
renewable
as
they
offer
validated
methodological
approach
practical
modifications
existing
models.
