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Titrate:
Operator DEFI_FONC_FLUI


Date:
31/01/05
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A. Key ADOBES
:
U4.35.01-E Page
: 1/8

Organization (S): EDF-R & D/MFTT
Handbook of Utilization
U4.3- booklet: Function
Document: U4.35.01
Operator DEFI_FONC_FLUI

1 Goal

To define a profile rate of flow fluid along a beam. Profiles corresponding to
“standard” profiles resulting from results experimental and used within the framework of a dynamic calculation with
taking into account of forces fluid-rubber bands.

Speeds are calculated with the nodes for which one seeks in the concept grid
value of the associated curvilinear X-coordinate.

Currently, it is possible to apply a profile speed defined by DEFI_FONC_FLUI only to one
structure whose meshs are of type “SEG2”. The produced concept is of type function (parameter
“ABSC”, curvilinear X-coordinate)
Handbook of Utilization
U4.3- booklet: Function HT-66/05/004/A

Code_Aster ®
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Titrate:
Operator DEFI_FONC_FLUI


Date:
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Author (S):
A. Key ADOBES
:
U4.35.01-E Page
: 2/8

2 Syntax

F [function] = DEFI_FONC_FLUI (


MAILLAGE
=
my
, [grid]

NOEUD_INIT
=
nor
, [node]


NOEUD_FIN
=
nf
, [node]

VITE = _F
(

/PROFIL
=/“UNIFORME”
,



VALE =/1.
[DEFAUT]








/vale,




[R]


/PROFIL
=/“LEONARD”,




NB_BAV
=
/
0
[DEFAUT]








/2








/3,





),


Interpol
=
/
“LIN”
[DEFAUT]








/“LOG”








/“NON”,


PROL_GAUCHE =/“EXCLUDED” [DEFECT]
/
“LINEAIRE”
/
“CONSTANT”
,


PROL_DROITE =/“EXCLUDED” [DEFECT]
/
“LINEAIRE”
/
“CONSTANT”
,


INFORMATION =/1 [DEFECT]








/2,


TITER
=
titrate
, [TXM]









);
Handbook of Utilization
U4.3- booklet: Function HT-66/05/004/A

Code_Aster ®
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Titrate:
Operator DEFI_FONC_FLUI


Date:
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3 Operands

3.1 Operand
MAILLAGE

MAILLAGE
=
my

Name of the grid for which the curvilinear X-coordinate is defined.

3.2 Operands
NOEUD_INIT and NOEUD_FIN

NOEUD_INIT = nor/NOEUD_FIN = nf

The function is defined on the whole of the grid. Nodes “INIT” and “FIN” allow
to define the zone of application of the profile speed. Apart from this zone, the value of the function
is null.

3.3 Key word
VITE

VITE

Key word factor, it makes it possible to define the profile speed.

PROFIL

This operand, associated operands VALE and NB_BAV, makes it possible to define a “standard” profile:
“UNIFORME” or “LEONARD”.

/
VALE = vale

Allows to define the level of the function, if the standard profile is “UNIFORME”.

/NB_BAV

If the profile is of type “LEONARD”, NB_BAV defines a “standard” profile stored in one
catalog.

Note:

BAV (Barre Anti Vibratoire) is a terminology related to the tubes of generator of
vapor. NB_BAV corresponds to the number of anti-vibratory bars being in
the zone of obtaining the profile.

3.4 Operand
Interpol

Interpol

Type of interpolation of the function enters the values of parameter of the field of definition.

· “LIN”:
linear,
· “LOG”:
logarithmic curve,
· “NON”:
one does not interpolate (and thus the program will stop if one asks
value of the function for a value of the parameter for which it
was not defined).
Handbook of Utilization
U4.3- booklet: Function HT-66/05/004/A

Code_Aster ®
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Titrate:
Operator DEFI_FONC_FLUI


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U4.35.01-E Page
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3.5 Operands
PROL_GAUCHE and PROL_DROITE

PROL_GAUCHE/PROL_DROITE

Define the type of prolongation on the left (respectively on the right) of the field of definition
parameter.

· “LINEAIRE”:
the function is prolonged on the left (on the right) by a segment
of the same line slope than on the lower terminal (higher)
field of definition of the parameter,
· “EXCLU”:
the extrapolation of the function apart from the field of
definition of the parameter is prohibited,
· “CONSTANT”:
the function is prolonged on the left (on the right) by the value
that it takes on the lower terminal (higher) field of
definition of the parameter.

3.6 Operand
INFO

INFO

Level of impression.

· INFO = 1:
no impression,
· INFO = 2:
one prints in file MESSAGE the name of the function, it
a number of points of definition, the name of the parameter, the name
result, options of prolongation and interpolation and
the first 10 values of the function, in the ascending order
parameter.

3.7 Operand
TITER

TITER
=
titrate

Argument of the text type defining the title attached to the concept function at output.
Handbook of Utilization
U4.3- booklet: Function HT-66/05/004/A

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Titrate:
Operator DEFI_FONC_FLUI


Date:
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4
Presentation of the standard profiles speed

They are defined in a form discretized in (varying angle in degrees of 0. to 180.) - [Figure 4-a],
[Figure 4-b] and [Figure 4-c].

Thus, it is possible starting from the equation [éq 4-1] to apply these profiles to a field defined in
curvilinear X-coordinate.

. +
v (S
I
I
I
I) =















éq 4-1
vmoy

vk+1- vk
I =

k+1-k



I
S - N
S I
with

180

I =


nf
S - nor
S

vk k+1- vk+1 K



I =

k+1-k

S, S, S
I
nor
nf is respectively the curvilinear X-coordinate of the point running, the NOEUD_INIT and of
NOEUD_FIN which define the zone of application.

K: index in the table of the discretized function.

NR
(I.
I + I)
I
v
=1
moy =

NR

NR: a number of points of discretization of the zone of application.
Handbook of Utilization
U4.3- booklet: Function HT-66/05/004/A

Code_Aster ®
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Date:
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Leonard profile without BAV
1,8
1,6
1,4
1,2
tess
1
0,8
L
from VI
0,6
Profi
0,4
0,2
0 0
5
5
30
75
90
48,
105
150
180
131,
Angle (°)

Appear 4-a: Profil speed - NB_BAV = 0

Leonard profile 2 BAV
1
0,9
0,8
0,7
0,6
tess
0,5
L
from VI 0,4
Profi 0,3
0,2
0,1
0 0
4
4
6
6
29
51
99
90
01
49
151
180
33,
47,
70,
75,
104,
109,
132,
146,
Angle (°)

Appear 4-b: Profil speed - NB_BAV = 2
Handbook of Utilization
U4.3- booklet: Function HT-66/05/004/A

Code_Aster ®
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Titrate:
Operator DEFI_FONC_FLUI


Date:
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Author (S):
A. Key ADOBES
:
U4.35.01-E Page
: 7/8

Leonard profile 3 BAV
1,4
1,2
1
0,8
0,6
Profile of Vitesse 0,4
0,2
0 0 7 7
2
8
3
3
48
44
15
90
85
56
25,
30,
132
180
51,
75,
77,
102,
104,
128,
149,
154,
Angle (°)

Appear 4-c: Profile speed - NB_BAV = 3

Handbook of Utilization
U4.3- booklet: Function HT-66/05/004/A

Code_Aster ®
Version
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Titrate:
Operator DEFI_FONC_FLUI


Date:
31/01/05
Author (S):
A. Key ADOBES
:
U4.35.01-E Page
: 8/8

5 Bibliography

[1]
NR. GAY: Flustru Version 2.0 - Présentation general. Note of use - source FORTRAN of
software. Note technical EDF/DER HT-32/93.05A.

Handbook of Utilization
U4.3- booklet: Function HT-66/05/004/A

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