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
Instruction manual
U3.14 booklet: Mechanical finite elements 3D
HT-66/05/004/A
Organization (S):
EDF-R & D/AMA, DeltaCAD
Instruction manual
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
(Phenomenon:
MECHANICS
) 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.
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
Instruction manual
U3.14 booklet: Mechanical finite elements 3D
HT-66/05/004/A
1 Discretization
1.1
Degrees of freedom
Modeling
Degrees of freedom (with each node node)
3d_FLUI_ABSO
NEAR
: 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
3d_FLUI_ABSO TRIA3
linear
TRIA6
quadratic
QUAD4
linear
QUAD8
QUAD9
quadratic
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
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
Instruction manual
U3.14 booklet: Mechanical finite elements 3D
HT-66/05/004/A
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 linearized deformations key word
“SMALL”
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
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
Instruction manual
U3.14 booklet: Mechanical finite elements 3D
HT-66/05/004/A
Intentionally white left page.