Numerical Heat Transfer Part A Applications,
Год журнала:
2023,
Номер
unknown, С. 1 - 21
Опубликована: Сен. 26, 2023
AbstractEngine
oil
has
a
vast
application
sector
as
it
is
the
most
essential
working
lubricant
for
industrial
machineries,
engines
of
vehicles,
and
aircraft
combustion
processing.
In
order
to
find
out
more
effective
engine
oil-based
hybrid
nanofluid
in
terms
heat
transfer
capabilities
minimize
production
cost,
novelty
our
present
study
focused
on
three
different
combinations
nanoparticles
(TiO2+CuO,
MOS2+ZnO,
Al2O3+Cu)
that
are
dispersed
Engine
(EO).
The
fundamental
aim
examine
thermal
flow
fluctuation
convective
dissipative
nano
liquid
understand
physical
quantities
properties
over
vertically
moving
plate
by
employing
Galerkin
Method
(GM).
Similarity
variables
initiated
permute
set
governing
equations
into
nonlinear
coupled
ordinary
differential
along
with
Bc's,
which
solved
using
both
numerical
(Maple)
analytical
method
This
MAPLE
software
uses
fourth-fifth-order
Runge-Kutta-Fehlberg
(RFK45)
technique
default
function
solve
numerically
boundary
value
problems.
Validation
this
been
conducted
comparison
previously
published
results.
results
given
opposing
assisting
distribution
fluid
motion
temperature
profiles,
wall
shear
stress,
rate
transfer.
great
significance
velocity
increasing
mixed
convection
parameters.
Brinkmann
number
Prandtl
have
larger
near
then
increase
decrease
respectively
satisfying
asymptotic
conditions.
Our
also
reveal
TiO2+CuO/Engine
significant
augment
than
MoS2+ZnO/Engine
Al2O3+Cu/Engine
oil.Keywords:
Assisting
flowBrinkmann
numbercounter
parallel
flowengine
nanofluidGalerkin
methodheat
transfermixed
convectionviscous
dissipation
AcknowledgmentsFor
study,
we
would
like
acknowledge
financial
support
Ministry
Science
&
Technology
(NST
research
grant),
Bangladesh.Disclosure
statementNo
potential
conflict
interest
was
reported
author(s).
Case Studies in Thermal Engineering,
Год журнала:
2023,
Номер
50, С. 103420 - 103420
Опубликована: Сен. 9, 2023
This
research
looks
at
the
incompressible,
viscous,
steady-state
laminar
stagnation-point-flow
of
a
Carreau
ternary-hybrid
nano-liquid
towards
convectively
heated
expanding
surface,
taking
into
account
first-order
slippage
and
Ohmic
dissipation.
Viscous
dissipation
effects
Lorentz
forces
are
also
considered.
It
is
discussed
how
thermal
radiation
heat
absorption/generation
contribute
to
transport
process.
Minimizing
entropy
during
ternary
hybrid
has
been
studied.
In
addition,
convective
circumstances
used
conceptually
in
numerical
solution
current
model.
tiny-particles
silver
(Ag),
molybdenum
disulfide
(MoS2),
multi-wall
carbon
nanotubes
(MWCNT)
analysed
this
work's
flow
study.
As
base
fluid,
carboxymethyl
cellulose
(CMC-water)
used.
With
use
appropriate
similarity
trans-formations,
standard
model
equations
transformed
dimensionless
form.
Finding
solutions
for
momentum
fields
using
Runge–Kutta-Fehlberg
technique
shooting
strategy.
The
figures
depict
wide
range
characteristics,
including
fluid
velocity,
temperature,
skin
friction,
Nusselt
number,
minimization,
Bejan
number.
Key
results
from
present
include
fact
that
velocity
curve
flattens
down
as
Weissenberg
number
increases.
Journal of Thermal Analysis and Calorimetry,
Год журнала:
2024,
Номер
149(9), С. 4209 - 4225
Опубликована: Март 11, 2024
Abstract
A
three-dimensional
computational
fluid
dynamics
(CFD)
study
is
carried
out
to
explore
the
effect
of
duct
cross
section
on
thermo-hydraulic
performance
various
ducts.
finite
volume-based
scheme
with
an
SST
k
-omega
model
and
mixture
(two-phase
model)
was
used
obtain
more
realistic
results.
two-phase
consider
movement
between
base
nanoparticles.
Al
2
O
3
nanoparticle
having
a
volume
fraction
0.01%
42
nm
as
particle
size,
heat
transfer
friction
factor
characteristic
are
studied
for
turbulent
flow
regime
(3000
<
Re
9000)
variable
thermo-physical
properties.
maximum
enhancement
86%
in
rate
obtained
serpentine
compared
conventional
circular
at
=
4500.
Owing
significantly
lower
increase
pressure
drop,
elliptical
has
highest
parameter
1.54
relative
duct.
Further,
analyze
quality,
entropy
generation
studied,
it
observed
that
square
reported
60%
lowest
reduction
54%
This
can
aid
choosing
geometry
enhance
nanofluid
applications
such
solar-thermal,
exchangers,
etc.
In
this
work,
entropy
generation
is
optimized
through
the
application
of
second
law
thermodynamics.
The
slip
mechanisms,
Brownian
diffusions,
and
thermophoresis
are
elaborated
using
tangent
hyperbolic
nanomaterial
model.
Magnetohydrodynamic
(MHD)
fluid
taken
into
consideration.
To
characterize
impact
activation
energy,
a
unique
model
involving
binary
chemical
reaction
deployed.
effects
mixed
convection
that
nonlinear
in
nature,
bioconvection,
Joule
effect
all
key
partial
differential
equations
(PDEs)
reduced
ordinary
(ODEs)
by
utilizing
appropriate
similarity
transformations
then
solved
numerically
with
help
built-in
‘bvp4c’
technique
MATLAB
software.
Varied
flow
parameters’
impacts
on
nanoparticle
volume
concentration,
number,
microorganism
temperature,
velocity
fields
analyzed
graphs.
Various
variables
consideration
to
calculate
total
rate
generation.
obtained
results
show
concentration
irreversibility,
viscous
dissipation,
heat
irreversibility
influence
entropy.
numerical
outcomes
were
observed
fixing
physical
parameters
as
0.1<α<4.0
,
id="m2">0.1<M<1.2
id="m3">0.1<Nr<2.2
id="m4">0.1<Le<2.2
id="m5">0.1<Nb<0.4
id="m6">0.1<Nt<1.0
id="m7">2.0<Pr<5.0
id="m8">0.1<Lb<2.0
well
their
momentum,
thermal,
density
profiles.
From
results,
an
increasing
estimate
variable
representing
indicates
decline
concentration.
higher
variable,
Hartmann
Weissenberg
while
Bejan
number
has
contrary
behavior.
Subsequently,
plotted
graphs
discussed
detail,
when
subjected
quantities.
