Energy and Power Engineering,
Journal Year:
2023,
Volume and Issue:
15(12), P. 500 - 516
Published: Jan. 1, 2023
Laminar
natural
convection
is
studied
in
a
square
cavity
filled
with
air
whose
two
vertical
sides
are
subject
to
temperature
difference,
while
the
other
horizontal
adiabatic.
The
hot
and
cold
wall
temperatures
kept
constant.
We
have
presented
dynamic
thermal
study
of
pure
for
different
values
Rayleigh
number.
numerical
simulation
was
carried
out
numbers
ranging
from
102,
103,
…,
105
Prandtl
number
Pr
=
0.71.
used
COMSOL
Multiphysic
5.1
software,
which
allows
us
simultaneously
solve
coupled
physical
phenomena
enclosure
containing
under
Boussinesq
approximation.
For
coupling
radiation
radiative
surfaces,
both
faces
subjected
flux,
emissivity
surfaces
varies
ε
0.1
0.8.
seen
that
circulation
process
involved.
fluid
high
near
rises
ceiling
sinks.
This
movement
continues
until
reaches
equilibrium.
In
convection-surface
coupling,
results
indicate
exchange
decreases
as
function
Surface
reduces
flow
cavity.
Case Studies in Thermal Engineering,
Journal Year:
2024,
Volume and Issue:
61, P. 105064 - 105064
Published: Sept. 1, 2024
Magnetohydrodynamic
and
entropy
generation
of
double-diffusive
mixed
convection
in
a
curvilinear
cavity
filled
with
nano-enhanced
phase
change
material
rotating
cylinder
has
been
studied
this
paper.
Three
heat
sources
have
considered
range
different
variables
such
as
Reynolds
number
(10
≤
Re
100),
Richardson
(0.1≤
Ri
10),
Hartmann
(0≤
Ha
≤50)
Lewis
Le
0.9),
bouncy
ratio
(1≤
Nz
5),
fusion
temperature
θf
≤0.9)
Stephan
Ste
≤0.9).
These
numerically
solved
by
applying
the
Finite
Element
Method.
The
main
results
indicated
that
transfer,
mass
transfer
capacity
are
hugely
increased
increase
Re,
volume
concentration
while
decreasing
generation.
Furthermore,
melting/solidification
region
is
influenced
variable
negligible
influence
on
streams,
transfer.
value
average
Nusselt
Sherwood
328
%
258
respectively
increasing
from
10
to
100.
Also,
these
two
numbers
decreased
61
54
0
20.
