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dune-fem
dune-fem-dg
Commits
fea22ee5
Commit
fea22ee5
authored
6 years ago
by
Robert K
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fast version of shock tube.
parent
b573cac8
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!4
Latest features added to dune-fem-dg.
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#11553
failed
6 years ago
Stage: test
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pydemo/euler/shock_tube_fast.py
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pydemo/euler/shock_tube_fast.py
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fea22ee5
import
time
from
dune.grid
import
structuredGrid
,
cartesianDomain
from
dune.fem
import
parameter
import
dune.create
as
create
from
dune.models.elliptic.formfiles
import
loadModels
from
llf
import
NumFlux
from
dune.femdg
import
createFemDGSolver
from
ufl
import
*
gamma
=
1.4
dim
=
2
from
euler
import
sod
as
problem
#from euler import radialSod3 as problem
Model
,
initial
,
x0
,
x1
,
N
,
endTime
,
name
=
problem
(
dim
,
gamma
)
parameter
.
append
({
"
fem.verboserank
"
:
-
1
})
parameter
.
append
(
"
parameter
"
)
grid
=
structuredGrid
(
x0
,
x1
,
N
)
# grid = create.grid("ALUSimplex", cartesianDomain(x0,x1,N))
dimR
=
grid
.
dimension
+
2
t
=
0
dt
=
1e-3
count
=
0
saveStep
=
0.15
saveTime
=
saveStep
def
initialize
(
space
):
return
space
.
interpolate
(
initial
,
name
=
'
u_h
'
)
if
space
.
order
==
0
:
return
space
.
interpolate
(
initial
,
name
=
'
u_h
'
)
else
:
lagOrder
=
1
# space.order
spacelag
=
create
.
space
(
"
lagrange
"
,
space
.
grid
,
order
=
lagOrder
,
dimrange
=
space
.
dimRange
)
u_h
=
spacelag
.
interpolate
(
initial
,
name
=
'
tmp
'
)
return
space
.
interpolate
(
u_h
,
name
=
'
u_h
'
)
def
useGalerkinOp
():
global
count
,
t
,
dt
,
saveTime
# a full fv implementation using UFL and the galerkin operator
# some sign error or something else leading to wrong results
# still needs fixing
spaceName
=
"
finitevolume
"
space
=
create
.
space
(
spaceName
,
grid
,
dimrange
=
dimR
)
n
=
FacetNormal
(
space
.
cell
())
u_h
=
space
.
interpolate
(
initial
,
name
=
'
u_h
'
)
u_h_n
=
u_h
.
copy
(
name
=
"
previous
"
)
fullModel
=
inner
(
Model
.
F_c
(
u
),
grad
(
v
)
)
*
dx
-
\
inner
(
NumFlux
(
Model
,
u
,
n
,
dt
),
v
(
'
+
'
)
-
v
(
'
-
'
))
*
dS
-
\
inner
(
Model
.
F_c
(
u
)
*
n
,
v
)
*
ds
operator
=
create
.
operator
(
"
galerkin
"
,
inner
(
u
-
u_h_n
,
v
)
*
dx
==
dt
*
replace
(
fullModel
,{
u
:
u_h_n
}),
space
)
operator
.
model
.
dt
=
1e-5
grid
.
writeVTK
(
name
,
pointdata
=
[
u_h
],
number
=
count
)
start
=
time
.
time
()
while
t
<
endTime
:
u_h_n
.
assign
(
u_h
)
operator
.
solve
(
target
=
u_h
)
t
+=
operator
.
model
.
dt
if
t
>
saveTime
:
count
+=
1
grid
.
writeVTK
(
name
,
pointdata
=
[
u_h
],
number
=
count
)
saveTime
+=
saveStep
print
(
"
time loop:
"
,
time
.
time
()
-
start
)
grid
.
writeVTK
(
name
,
pointdata
=
[
u_h
],
number
=
count
)
def
useODESolver
(
polOrder
=
2
,
limiter
=
'
default
'
):
global
count
,
t
,
dt
,
saveTime
polOrder
=
polOrder
if
False
:
# needs change in dune/fem-dg/operator/dg/passtraits.hh
space
=
create
.
space
(
"
dglegendre
"
,
grid
,
order
=
polOrder
,
dimrange
=
dimR
,
hierarchical
=
False
)
else
:
space
=
create
.
space
(
"
dgonb
"
,
grid
,
order
=
polOrder
,
dimrange
=
dimR
)
u_h
=
initialize
(
space
)
# rho, v, p = Model.toPrim(u_h)
operator
=
createFemDGSolver
(
Model
,
space
,
limiter
=
limiter
)
# operator.setTimeStepSize(dt)
operator
.
applyLimiter
(
u_h
);
print
(
"
number of elements:
"
,
grid
.
size
(
0
),
flush
=
True
)
grid
.
writeVTK
(
name
,
pointdata
=
[
u_h
],
# celldata={"density":rho, "pressure":p}, # bug: density not shown correctly
#celldata={"pressure":p, "maxLambda":Model.maxLambda(0,0,u_h,as_vector([1,0]))},
#cellvector={"velocity":v},
number
=
count
,
subsampling
=
2
)
start
=
time
.
time
()
tcount
=
0
while
t
<
endTime
:
operator
.
solve
(
target
=
u_h
)
# operator.applyLimiter( u_h );
dt
=
operator
.
deltaT
()
t
+=
dt
tcount
+=
1
if
tcount
%
100
==
0
:
print
(
'
[
'
,
tcount
,
'
]
'
,
'
dt =
'
,
dt
,
'
time =
'
,
t
,
'
count =
'
,
count
,
flush
=
True
)
if
t
>
saveTime
:
count
+=
1
grid
.
writeVTK
(
name
,
pointdata
=
[
u_h
],
#celldata={"pressure":p, "maxLambda":Model.maxLambda(0,0,u_h,as_vector([1,0]))},
#cellvector={"velocity":v},
number
=
count
,
subsampling
=
2
)
saveTime
+=
saveStep
print
(
"
time loop:
"
,
time
.
time
()
-
start
)
print
(
"
number of time steps
"
,
tcount
)
grid
.
writeVTK
(
name
,
pointdata
=
[
u_h
],
#celldata={"pressure":p, "maxLambda":Model.maxLambda(0,0,u_h,as_vector([1,0]))},
#cellvector={"velocity":v},
number
=
count
,
subsampling
=
2
)
if
True
:
# grid = structuredGrid(x0,x1,N)
grid
=
create
.
grid
(
"
ALUCube
"
,
cartesianDomain
(
x0
,
x1
,
N
))
grid
.
hierarchicalGrid
.
globalRefine
(
1
)
# grid = create.view("adaptive", grid)
useODESolver
(
2
,
'
default
'
)
# third order with limiter
elif
False
:
N
=
[
n
*
10
for
n
in
N
]
grid
=
structuredGrid
(
x0
,
x1
,
N
)
# grid = create.grid("ALUSimplex", cartesianDomain(x0,x1,N))
useODESolver
(
0
,
None
)
# FV scheme
elif
False
:
N
=
[
n
*
10
for
n
in
N
]
grid
=
structuredGrid
(
x0
,
x1
,
N
)
# grid = create.grid("ALUSimplex", cartesianDomain(x0,x1,N))
useODESolver
(
0
,
'
default
'
)
# FV scheme with limiter
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