Mixed heat transfer from a square cylinder near the wall
Physics of Fluids,
Год журнала:
2025,
Номер
37(3)
Опубликована: Март 1, 2025
This
study
investigates
the
effect
of
flow
and
heat
transfer
on
a
square
cylinder
placed
near
planar
wall.
The
is
assumed
to
be
within
boundary
layer
Five
different
wall-to-cylinder
gap
ratios
are
considered,
i.e.,
G/D
=
0.2,
0.6,
1.2,
2,
3.
Reynolds
number
based
width
fixed
at
Re
150.
In
this
study,
two-dimensional
analysis
performed
for
mixed
convection
under
influence
aiding
opposing
buoyancy
(−1≤Ri
≤
1).
unsteady
governing
continuity,
momentum,
energy
equations
solved
with
fully
implicit
fractional-step
method
using
computer
code
written
in
FORTRAN.
numerical
results
have
been
presented
terms
characteristics,
such
as
mean
drag
rms
lift
coefficients,
local
Nusselt
variations.
For
qualitative
assessment,
field
temperature
distributions
also
acquired
interpret
understand
underlying
physical
mechanism
because
patterns
change
simultaneously.
case
pure
forced
convection,
rate
0.2
was
about
half
that
3
case.
significant
caused
by
large
velocity
difference
between
top
front
surfaces
when
plane
Additionally,
Ri
>
0,
ratio
coefficient
Nu
decreased.
Язык: Английский
Examination of Wake Characteristics for Tandem Circular Cylinders via Computational Fluid Dynamics
Journal of Advanced Research in Natural and Applied Sciences,
Год журнала:
2025,
Номер
11(1), С. 1 - 11
Опубликована: Март 31, 2025
Wake
characteristics
of
the
cylinders
have
been
numerically
investigated
for
tandem
arrangement.
The
study
was
done
airflow
at
a
diameter-based
Reynolds
number
Re
=
200
via
ANSYS-Fluent
2021
R1.
Variations
horizontal
distances
between
two
with
same
diameter
considered
in
1.5
≤
L*
6
range.
drag
coefficients
attained,
and
these
results
presented
along
flow
velocity
components,
magnitude
values
vorticity,
pressure
distributions.
In
front
upstream
cylinder,
stagnated
all
cases.
Nonetheless,
it
has
observed
≥
4.5
terms
downstream
cylinder.
periodical
clusters
cross-stream
components
attained
wake
region.
Vortex
shedding
patterns.
unsteady
structures
seen.
spacing
circular
influenced
force.
Nevertheless,
effect
an
cylinder
on
one
disappeared
this
study.
coefficient
is
approximately
concerning
value
single
as
result
Язык: Английский