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So
me
HP
C c
ha
lle
ng
es
fo
r
mu
lti-
ph
ys
ics
ex
ten
de
d C
FD
co
mp
uta
tio
ns
F.
Vuill
ot,
A. R
efloch
ON
ER
A/D
SN
A
2"w
ork
sh
op
on
HP
C-C
FD
in
En
erg
y/T
ran
sp
ort
Do
ma
ins", H
PC
C 2
014,
Au
gu
st
20-2
2, 2014,
Eco
led
es M
ines, P
ari
s
Ou
tlin
e o
f p
res
en
tati
on
•C
onte
xt
(multi-physic
s e
xte
nded C
FD
for
researc
h a
nd industr
y)
•O
NE
RA
'sC
ED
RE
code
1)
Som
e H
PC
challe
nges
–M
em
ory
–I/
O lib
rary
–L
ag
ran
gia
nvs
Eu
leri
an
–C
ou
plin
g a
nd
CW
IPI
libra
ry
–S
ca
lab
ility
2)
Larg
e s
cale
LE
S e
xam
ple
s
–A
ero
aco
ustics
–R
ea
ctive
flo
ws
–T
wo
-ph
ase
flo
ws
•C
onclu
sio
ns
3"w
ork
sh
op
on
HP
C-C
FD
in
En
erg
y/T
ran
sp
ort
Do
ma
ins", H
PC
C 2
014,
Au
gu
st
20-2
2, 2014,
Eco
led
es M
ines, P
ari
s
HP
C c
ha
lle
ng
es
: 1 t
arg
et
–3 a
xes
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4"w
ork
sh
op
on
HP
C-C
FD
in
En
erg
y/T
ran
sp
ort
Do
ma
ins", H
PC
C 2
014,
Au
gu
st
20-2
2, 2014,
Eco
led
es M
ines, P
ari
s
Co
nte
xt
•H
ard
ware
evolu
tion
–F
rom
ve
cto
r m
ain
fra
me
s (
Cra
y,
NE
C,
Fu
jitsu
), la
rge
me
mo
ry p
er
co
re
–T
o s
ca
lar
pa
ralle
l clu
ste
rs,
red
uce
d m
em
ory
pe
r co
re
–T
ow
ard
s H
PC
clu
ste
rs a
nd
exa
sca
lem
ach
ine
s,
limite
d m
em
ory
pe
r
co
re
•M
ulti-physic
s e
xte
nded C
FD
–F
rom
pu
re a
ero
dyn
am
ic c
on
ditio
ns (
1 s
pe
cie
s,
pe
rfe
ct/
ide
al g
as)
–T
o r
ea
ctive
co
nd
itio
ns (
mu
lti-
sp
ecie
s,
ch
em
ica
l kin
etics,
rea
l g
ase
s)
–T
o m
ulti-
ph
ase
s c
on
ditio
ns (
dis
pe
rse
d,
se
pa
rate
d,
mix
ed
)
–T
o m
ulti-
ph
ysic
s c
on
ditio
ns (
ae
roa
co
ustics,
flu
id-s
olid
in
tera
ctio
ns
(he
at
tra
nsfe
rs,
me
ch
an
ics),
ele
ctr
o-m
ag
ne
tism
, m
ovin
g m
esh
es,
...)
•C
ode c
halle
nges
–M
em
ory
an
d I
/O m
an
ag
em
en
ts
–A
uto
ma
tic p
art
itio
nin
g a
nd
ba
lan
cin
g
–C
ou
plin
g p
roce
du
res
–H
PC
re
qu
ire
me
nts
at
eve
ry le
ve
l
5"w
ork
sh
op
on
HP
C-C
FD
in
En
erg
y/T
ran
sp
ort
Do
ma
ins", H
PC
C 2
014,
Au
gu
st
20-2
2, 2014,
Eco
led
es M
ines, P
ari
s
ON
ER
A's
CE
DR
E c
od
e
•O
NE
RA
'sre
fere
nce
co
de
fo
r e
ne
rge
tics
an
dp
rop
uls
ion
•U
nstr
uctu
red
me
sh
es
–C
ell
cente
red
(fin
ite
volu
me),
expl/im
plic
it, M
US
CL u
pto
hig
hord
er
–G
enera
lized, fu
ll poly
hedra
l, m
eshes
(face
base
d)
•P
ara
llel
–M
PI based
–A
uto
matic
part
itio
nnin
gand
bala
ncin
g
•M
ulti-
ph
ysic
s
–In
tern
al(d
iffe
rentC
ED
RE
solv
ers
for
diffe
rent
ph
ysic
alsyste
ms)
•C
ha
rme
: N
avie
r-S
toke
s, tu
rbu
lent, r
ea
ctive
, re
alg
ases, m
ulti-p
hase
s
•S
pa
rte: d
ispe
rse
dp
ha
ses (
La
gra
ng
ian
)
•S
pir
ée
: d
isp
ers
ed
ph
ases (
Eu
leri
an)
•A
str
e: ra
dia
tio
n (
Mo
nte
-Ca
rlo
)
•R
éa
: ra
dia
tio
n (
dis
cre
teo
rdin
ate
)
•A
ca
cia
: th
erm
al so
lutio
ns in s
olid
s
•F
ilm:
liqu
idfilm
s
–E
xte
rnal(c
ouplin
glib
rari
es: M
pC
CI, C
WIP
I, O
penP
alm
)
–M
ovin
g/d
efo
rma
ble
mesh
(conserv
ative A
LE
ap
pro
ach)
•Z
on
al a
pp
roa
ch
(mo
de
lsp
er
use
r's
do
ma
in)
6"w
ork
sh
op
on
HP
C-C
FD
in
En
erg
y/T
ran
sp
ort
Do
ma
ins", H
PC
C 2
014,
Au
gu
st
20-2
2, 2014,
Eco
led
es M
ines, P
ari
s
HP
C c
ha
lle
ng
es
fo
r s
pe
cif
icin
du
str
ialn
eed
s
•U
nstr
uctu
red
mesh
–no
alig
ned
data
•M
em
ory
•I/
O
•M
ulti-physic
s-
couplin
gappro
aches
•S
cala
bili
ty
•M
ovin
gm
esh
(not
pre
sente
d)
7"w
ork
sh
op
on
HP
C-C
FD
in
En
erg
y/T
ran
sp
ort
Do
ma
ins", H
PC
C 2
014,
Au
gu
st
20-2
2, 2014,
Eco
led
es M
ines, P
ari
s
ME
MO
RY
•Im
port
ance o
fm
em
ory
–m
easure
insid
ecode (
house k
eepin
g)
•C
urr
ent
trend o
f decre
asin
g a
vaila
ble
mem
ory
per
core
HO
WE
VE
R:
–R
esili
en
ce
pro
ble
m:
MT
TI
ch
eckp
oin
t-re
sta
rt
–Im
pa
ct
of
Big
Da
ta (
als
on
ee
ds
of
big
me
mo
ry)
–A
dva
nce
sin
te
ch
no
lgy
•P
RA
M (
para
mete
rra
ndom
access
mem
ory
) in
pla
ce o
fR
AM
•R
eR
am
(HP
–"T
he
Machin
e"
pro
ject)
–M
ore
me
mo
ryca
na
lso
ha
ve
an
in
flu
en
ce
on
mu
lti-
ph
ysic
s c
ou
plin
g
Mem
ory
red
ucti
on
tren
d m
ay
be
co
un
ter
bala
nced
(fo
rtu
nate
ly)
8"w
ork
sh
op
on
HP
C-C
FD
in
En
erg
y/T
ran
sp
ort
Do
ma
ins", H
PC
C 2
014,
Au
gu
st
20-2
2, 2014,
Eco
led
es M
ines, P
ari
s
I/O
is
su
e (
1/2
)
Unstr
uctu
red
data
=>
non c
ontinu
ous
/ in
tele
ave
ddata
Larg
e n
um
ber
of
sm
all
file
s (
per
core
):
Pro
ble
mfo
r ba
ckup
and
for
para
llelfile
syste
m(L
ustr
e, �����
Sin
gle
file
:
in-h
ouse
libra
ry,
bin
ary
,
com
patib
ility
little-e
ndia
n/b
ig-e
ndia
n
Resta
rt o
fcom
puta
tions o
n d
iffe
rent
num
ber
of
core
s(s
trong
users
dem
an
ds)
9"w
ork
sh
op
on
HP
C-C
FD
in
En
erg
y/T
ran
sp
ort
Do
ma
ins", H
PC
C 2
014,
Au
gu
st
20-2
2, 2014,
Eco
led
es M
ines, P
ari
s
I/O
is
su
e (
2/2
)
Actu
albott
leneck:
ways
to e
scape
–T
est
thro
ug
hP
roje
t P
RA
CE
: C
ed
reP
rep
ara
tory
pro
ject
n°
PR
A0
17
,
20
10
, co
mp
ute
r Ju
ge
ne
fro
mJu
elic
h,
1M
h
–I/
O lib
rary
tests
on
32
00
0 c
ore
s,
GP
FS
is
be
tte
rth
an
Lu
str
e
–"I
nte
rle
ave
d"
co
st
islim
ite
dfo
r re
sta
rt f
iles
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10
"w
ork
sh
op
on
HP
C-C
FD
in
En
erg
y/T
ran
sp
ort
Do
ma
ins", H
PC
C 2
014,
Au
gu
st
20-2
2, 2014,
Eco
led
es M
ines, P
ari
s
Mu
ltip
hys
ics
: E
ule
ria
nv
s L
ag
ran
gia
n
•M
ulti-
ph
ysic
s:
mo
re c
ha
llen
ge
s t
o b
e f
ace
d
•E
ule
ria
na
pp
roa
ch
: p
ara
llel b
y d
om
ain
•L
ag
ran
gia
na
pp
roa
ch
: p
ara
llel b
y t
raje
cto
ry (
e.g
. p
ho
ton
s)
•B
oth
ap
pro
ach
es in
CE
DR
E
•P
rob
lem
of
loa
d b
ala
ncin
g f
or
the
co
mp
lete
sim
ula
tio
n
•S
om
e L
ag
ran
gia
na
pp
roa
ch
ne
ed
s a
ll th
e m
esh
on
ea
ch
co
re (
e.g
.
so
lve
r A
str
e)
–Lim
it o
f m
em
ory
: h
ybri
d s
olu
tion thro
ugh
Ope
nM
P
–T
oday t
his
solu
tion p
erm
its to
push th
e lim
it fro
m 3
M e
lem
ents
to 2
0 M
ele
ments
(48G
o/n
ode)
•W
ork
s a
re s
till
ne
ed
ed
on
th
at
su
bje
ct
11
"w
ork
sh
op
on
HP
C-C
FD
in
En
erg
y/T
ran
sp
ort
Do
ma
ins", H
PC
C 2
014,
Au
gu
st
20-2
2, 2014,
Eco
led
es M
ines, P
ari
s
CW
IPI:
Co
up
lin
g W
ith
Pa
ralle
l In
terf
ac
e
•D
evelo
ped
at
ON
ER
A
•O
pen s
ourc
e (
cedre
.onera
.fr)
•T
est
on C
urie 3
2k c
ore
s–
1 B
illio
n n
odes
–S
imu
late
s t
he
co
up
ling
be
twe
en
tw
o s
oft
wa
res
thro
ug
h a
n
exch
an
ge
acro
ss a
n in
terf
ace
co
nsis
tin
g o
f a
pa
rtitio
ne
d s
urf
ace
.
Th
e d
iscre
tiza
tio
no
f th
e s
urf
ace
is u
niq
ue
to
ea
ch
co
de
.
–S
yn
ch
ron
ou
svs a
syn
ch
ron
ou
s:
sp
ee
d r
atio
10
-15
12
"w
ork
sh
op
on
HP
C-C
FD
in
En
erg
y/T
ran
sp
ort
Do
ma
ins", H
PC
C 2
014,
Au
gu
st
20-2
2, 2014,
Eco
led
es M
ines, P
ari
s
CE
DR
E:
Sc
ala
bilit
yte
sts
We a
ckn
ow
led
ge
PR
AC
E f
or
aw
ard
ing
us a
cce
ss to r
eso
urc
e C
UR
IE b
ase
d in
FR
AN
CE
at
TG
CC
, P
roje
ct
PA
13
89
, 20
13,
20
0 k
h
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������������������ ����������� ����
13
"w
ork
sh
op
on
HP
C-C
FD
in
En
erg
y/T
ran
sp
ort
Do
ma
ins", H
PC
C 2
014,
Au
gu
st
20-2
2, 2014,
Eco
led
es M
ines, P
ari
s
Ex
am
ple
so
fla
rge
sc
ale
LE
S "
rea
llife
" a
pp
lica
tio
ns
•A
ero
acoustics
•R
eactive
flow
s
•T
wo-p
hase
reactive
flow
s
14
"w
ork
sh
op
on
HP
C-C
FD
in
En
erg
y/T
ran
sp
ort
Do
ma
ins", H
PC
C 2
014,
Au
gu
st
20-2
2, 2014,
Eco
led
es M
ines, P
ari
s
La
rge
sc
ale
LE
S:
Ae
roa
co
usti
cs
(1/2
)
•Jet
nois
e
–A
ircra
ft n
ois
e r
ed
uctio
n s
tud
ies
–H
yb
rid
ap
pro
ach
: C
ED
RE
LE
S-C
FD
+ K
IM a
co
ustic c
od
e
–2
50
Mce
lls+
re
so
lve
d n
ozzle
bo
un
da
ry la
ye
r tr
ipp
ing
, 9
60
co
res
M.
Lort
eau, F
. C
léro
, F
. V
uil
lot,
"R
ecen
tpro
gre
ssin
LE
S c
om
puta
tion f
or
aero
acoust
ics
of
turb
ule
nt
hot
jet.
Com
par
ison
to e
xper
imen
ts
and
nea
rfi
eld
anal
ysi
s",
AIA
A 2
014-3
057, 20th
AIA
A/C
EA
S A
ero
acoust
ics
Confe
ren
ce, 16-2
0 J
une
2014, A
tlan
ta, G
a, U
SA
15
"w
ork
sh
op
on
HP
C-C
FD
in
En
erg
y/T
ran
sp
ort
Do
ma
ins", H
PC
C 2
014,
Au
gu
st
20-2
2, 2014,
Eco
led
es M
ines, P
ari
s
La
rge
sc
ale
LE
S:
Ae
roa
co
usti
cs
(2/2
)
•Landin
g g
ear
nois
e–
Air
cra
ftn
ois
e r
ed
uctio
nstu
die
s
–C
om
ple
xg
eo
me
trie
s:
un
str
uctu
red
me
sh
es
are
re
qu
ire
d
–H
yb
rid
ap
pro
ach
: C
ED
RE
LE
S-C
FD
+ K
IM a
co
ustic
co
de
–7
0 M
ce
lls+
ZD
ES
tu
rbu
len
ce
mo
de
ling
L. S
and
ers,
N.
Lupo
gla
zoff
, F
. V
uil
lot,
E. M
anoh
a, D
. L
uqu
et, F
. d
e la
Puen
te, "F
urt
her
flow
and
nois
e pre
dic
tions
of
the
Gulf
stre
am
PD
CC
nose
landin
g g
ear
bas
edon t
he
CE
DR
E u
nst
ruct
ure
dso
lver
", 1
9th
AIA
A/C
EA
S A
ero
acoust
ics
Confe
ren
ce, 27-2
9 M
ay 2
013,
Ber
lin, G
erm
any
F. de
la P
uen
te,
L. S
and
ers,
F. V
uil
lot,
"O
n L
AG
OO
N n
ose
landin
g g
ear
CF
D/C
AA
com
puta
tion o
ver
unst
ruct
ure
dm
esh
usi
ng
a Z
DE
S
appro
ach",
AIA
A 2
014
-, 2
0th
AIA
A/C
EA
S A
ero
acoust
ics
Confe
ren
ce, 16
-20 J
une
2014, A
tlan
ta, G
a, U
SA
Gulf
stre
am
/Nasa
PD
CC
nose
landin
g g
ear
(BA
NC
work
shop)
Air
bus
Lagoon N
LG
(B
AN
C w
ork
shop)
16
"w
ork
sh
op
on
HP
C-C
FD
in
En
erg
y/T
ran
sp
ort
Do
ma
ins", H
PC
C 2
014,
Au
gu
st
20-2
2, 2014,
Eco
led
es M
ines, P
ari
s
La
rge
sc
ale
LE
S:
Re
ac
tiv
efl
ow
s
•S
upers
onic
reactive
flow
in o
ver-
expan
ded
nozzle
+ f
ilm c
oolin
g
–L
au
nch
er
stu
die
s(C
NE
S,
AT
AC
pro
ject)
–6
sp
ecie
s +
se
ve
n s
tep
s r
ea
ctive
sch
em
e
–7
.5 M
ce
lls+
ZD
ES
tu
rbu
len
ce
mo
de
ling
B. S
ainte
-Rose
, N
. B
erti
er, S
. D
eck, F
. D
upoir
ieux
, "N
um
eric
al s
imula
tions
and p
hysi
cal
anal
ysi
s of
an o
ver
-ex
pan
ded
rea
ctiv
e gas
flo
w
in a
pla
nar
nozz
le",
Com
bust
ion a
nd F
lam
e 159 (
2012),
2856-2
871
Iso-Q
surf
ace
colo
ure
db
y m
od(U
x)
17
"w
ork
sh
op
on
HP
C-C
FD
in
En
erg
y/T
ran
sp
ort
Do
ma
ins", H
PC
C 2
014,
Au
gu
st
20-2
2, 2014,
Eco
led
es M
ines, P
ari
s
La
rge
sc
ale
LE
S:
Tw
o-p
ha
se
rea
cti
ve
flo
ws
•Liq
uid
pro
pella
nt
rocket
moto
rcom
bustion c
ham
ber
–M
AS
CO
TT
E c
ryo
ge
nic
test
be
nch
(LO
X-G
H2
typ
e)
–C
ou
plin
g o
f tw
o C
ED
RE
Eu
leri
an
so
lve
rs
•C
HA
RM
E for
separa
ted
phase
flo
w (
gas a
nd
liq
uid
jet)
•S
PIR
EE
for
the d
ispers
ed d
rople
t spra
y f
low
–1
0 M
ce
llsg
rid
, 2
x4
80
co
res
A. M
urr
one,
N. F
did
a, C
. L
e T
ouze
, L
. V
inger
t(2
014),
"A
tom
izat
ion o
f cr
yo
gen
ic r
ock
et e
ngin
es c
oax
ial
inje
ctors
. M
odel
ing a
spec
ts a
nd
exper
imen
tal
inv
esti
gat
ions"
, S
pac
e P
ropuls
ion, 2014, C
olo
gn
e, G
erm
any,
19-
22 m
ai, 2014
18
"w
ork
sh
op
on
HP
C-C
FD
in
En
erg
y/T
ran
sp
ort
Do
ma
ins", H
PC
C 2
014,
Au
gu
st
20-2
2, 2014,
Eco
led
es M
ines, P
ari
s
Wra
p-u
p
•H
PC
challe
nges f
or
researc
hand
industr
ialflow
s
–U
nstr
uctu
red
da
ta s
tru
ctu
res
–I/
O a
nd
me
mo
rym
an
ag
em
en
t
–E
xch
an
ge
an
dco
up
ling
pro
ce
du
res
•O
NE
RA
'sC
ED
RE
code for
energ
etics
and
pro
puls
ion
•Larg
e s
cale
LE
S:
recentexam
ple
s
•C
lear
HP
C n
eeds
–U
nste
ad
yflo
wso
lutio
ns
–M
ulti-
ph
ysic
s
–D
ata
ma
na
ge
me
nt
•W
ork
s a
re in p
rogre
ss
in these
are
as
19
"w
ork
sh
op
on
HP
C-C
FD
in
En
erg
y/T
ran
sp
ort
Do
ma
ins", H
PC
C 2
014,
Au
gu
st
20-2
2, 2014,
Eco
led
es M
ines, P
ari
s
Th
an
kyo
ufo
r yo
ur
att
en
tio
n
•Q
UE
ST
ION
S ?
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