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UNDER CONSTRUCTION Author: Daniel Kantor and Andrew Einstein, Cornell University Problem Specification |
Problem Specification
The purpose of this tutorial is to illustrate the setup and solution of a turbulent flow past a sphere. Flow past a sphere is one of the classical problems of fluid mechanics. For this problem, we will be looking at Reynolds number of 1.14E6.
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{panel} UNDER CONSTRUCTION Author: Daniel Kantor and Andrew Einstein, Cornell University {color:#ff0000}{*}Problem Specification{*}{color} [1. Create Geometry in GAMBIT|FLUENT - Turbulent Flow Past a Sphere - Step 1] [2. Mesh Geometry in GAMBIT|FLUENT - Turbulent Flow Past a Sphere - Step 2] [3. Specify Boundary Types in GAMBIT|FLUENT - Turbulent Flow Past a Sphere - Step 3] [4. Set Up Problem in FLUENT|FLUENT - Turbulent Flow Past a Sphere - Step 4] [5. Solve\!|FLUENT - Turbulent Flow Past a Sphere - Step 5] [6. Analyze Results|FLUENT - Turbulent Flow Past a Sphere - Step 6] [7. Refine Mesh|FLUENT - Turbulent Flow Past a Sphere - Step 7] [Problem 1|FLUENT - Turbulent Flow Past a Sphere - Problem 1] {panel} h2. Problem Specification !pb_img001.jpg|width=32,height=32! The purpose of this tutorial is to illustrate the setup and solution of a turbulent flow past a sphere. Flow past a sphere is one of the classical problems of fluid mechanics. For this problem, we will be looking at Reynolds number of 1.14E6. {latex} \large $$ {Re} = {\rho VD \over \mu} $$ {latex} |
We
...
know
...
D
...
=
...
6.
...
To
...
obtain
...
Re
...
=
...
1.14E6,
...
we
...
can
...
arbitrarily
...
set
...
ρ,
...
V
...
and
...
μ,
...
but
...
will
...
use
...
the
...
standard
...
values
...
in
...
Fluent.
...
For
...
our
...
case,
...
let's
...
set
...
ρ
...
=
...
1.225
...
kg/m
...
3 ,
...
V
...
=
...
2.7754
...
m/s
...
and
...
μ
...
=
...
1.7894E-05
...
kg/ms.
...
Preliminary Analysis
For Re = 1.14E6,
...
we
...
are
...
looking
...
at
...
turbulent
...
flow.
...
What
...
will
...
be
...
the
...
velocity
...
profile
...
of
...
this
...
flow?
...
What
...
will
...
be
...
the
...
drag
...
coefficient
...
of
...
the
...
sphere?
...
What
...
will
...
be
...
the
...
pressure
...
coefficient
...
around
...
sphere?
...
How
...
will
...
the
...
streamlines
...
around
...
sphere
...
look?
...
Let's
...
start
...
the
...
modeling
...
in
...
our
...
quest
...
to
...
find
...
out
...
the
...
answer
...
!
...
We'll
...
create
...
the
...
geometry
...
and
...
mesh
...
in
...
GAMBIT
...
which
...
is
...
the
...
preprocessor
...
for
...
FLUENT,
...
and
...
then
...
read
...
the
...
mesh
...
into
...
FLUENT
...
and
...
solve
...
for
...
the
...
flow
...
solution.
...
...
...
...
...
...
...
...