Code_Aster ®
Version
7.4
Titrate:
Modeling 3d_FLUI_ABSO
Date:
01/06/05
Author (S):
G. DEVESA, F. LEBOUVIER Key
:
U3.14.10-C Page
: 1/4
Organization (S): EDF-R & D/AMA, DeltaCAD
Handbook of Utilization
U3.14 booklet: Mechanical finite elements 3D
Document: U3.14.10
Modeling 3d_FLUI_ABSO
Summary:
This document describes for modeling 3d_FLUI_ABSO:
· degrees of freedom carried by the finite elements which support modeling,
· the related meshs supports,
· supported loadings,
· nonlinear possibilities,
· case-tests implementing modeling.
Modeling 3d_FLUI_ABSO (Phénomčne: MECANIQUE) corresponds to finite elements of which meshs
supports are surface. They make it possible to take into account the condition of absorbing border of volumes
fluids.
Handbook of Utilization
U3.14 booklet: Mechanical finite elements 3D
HT-66/05/004/A
Code_Aster ®
Version
7.4
Titrate:
Modeling 3d_FLUI_ABSO
Date:
01/06/05
Author (S):
G. DEVESA, F. LEBOUVIER Key
:
U3.14.10-C Page
: 2/4
1 Discretization
1.1
Degrees of freedom
Modeling
Degrees of freedom (with each node node)
3d_FLUI_ABSO
PRES: pressure
PHI: fluid potential of displacement
1.2
Net support of the matrices of rigidity
The meshs supports of the finite elements can be quadrangles or triangles. Elements
are isoparametric.
Modeling Nets Interpolation
Remarks
linear 3d_FLUI_ABSO TRIA3
TRIA6
quadratic
QUAD4
linear
QUAD8
quadratic
QUAD9
1.3
Net support of the loadings
The same ones as previously.
2 Loadings
supported
AFFE_CHAR_MECA
3d_FLUI_ABSO
Remarks
DDL_IMPO
FDLV111A
Handbook of Utilization
U3.14 booklet: Mechanical finite elements 3D
HT-66/05/004/A
Code_Aster ®
Version
7.4
Titrate:
Modeling 3d_FLUI_ABSO
Date:
01/06/05
Author (S):
G. DEVESA, F. LEBOUVIER Key
:
U3.14.10-C Page
: 3/4
3 Possibilities
non-linear
3.1
Laws of behaviors
The only relation of behavior available for this modeling is RELATION “ELAS” (under
COMP_INCR) in DYNA_NON_LINE (Cf. [U4.51.11]).
3.2 Deformations
Only the linearized deformations key word “PETIT” under DEFORMATION are available in
relations of behavior (Cf. [U4.51.11]).
4
Examples of implementation: case-tests
FDLV111A [V8.01.111]: Absorption of a wave of pressure in a fluid column
Handbook of Utilization
U3.14 booklet: Mechanical finite elements 3D
HT-66/05/004/A
Code_Aster ®
Version
7.4
Titrate:
Modeling 3d_FLUI_ABSO
Date:
01/06/05
Author (S):
G. DEVESA, F. LEBOUVIER Key
:
U3.14.10-C Page
: 4/4
Intentionally white left page.
Handbook of Utilization
U3.14 booklet: Mechanical finite elements 3D
HT-66/05/004/A
Outline document