3. Modeling A#
3.1. Characteristics of modeling#
Here we are modeling a case \(\mathrm{2D}\). The flows are calculated on 3 sides:
the vertical left side, noted “MGAUCHE”
the vertical right side, noted “MDROIT”
a vertical side in the subject, noted “MMIL”.
We will reorient the edge stitches so as to have an outgoing normal. The flow being directed from right to left in this example will be positive on MGAUCHE and negative on MDROIT.
We will reorient MMIL so that the normal goes out to the right part of the bar based on MMIL. That way the flow will be positive on MMIL.
To reorient the meshes in \(\mathrm{2D}\), we use the keyword factor ORIE_PEAU_2D from the MODI_MAILLAGE command. If the side is internal, you must specify a group of surface elements on which it relies to determine the outgoing normal to this group (keyword GROUP_MA_SURF).
To reorient the cells in \(\mathrm{3D}\), we use the keyword factor ORIE_PEAU_3Dde the command MODI_MAILLAGE. If the surface is internal, we must specify a group of volume elements on which it relies to determine the outgoing normal to this group (keyword GROUP_MA_VOLU).
The quantity of water on surfaces \(\Gamma\) thus defined will therefore be equal to
\({\mathrm{\int }}_{\Gamma }{M}_{11}\mathrm{.}\nu \mathrm{=}\mathit{h.}\rho \frac{{K}_{\mathit{int}}}{\mu }\mathrm{.}\frac{{P}_{\mathit{ini}}\mathrm{-}{P}_{G}}{L}\mathrm{=}2{10}^{\text{-10}}{\mathit{kg.s}}^{\mathrm{-}1}\).
The flows of steam \({M}_{12}\), dry air \({M}_{21}\) and dissolved air \({M}_{22}\) are themselves almost zero (with the exception of simplifications).
The modeling tested here is D_ PLAN_HH2S
3.2. Characteristics of the mesh#
Number of knots: 805
Number of meshes and types: 406 meshes, 206 SEG3et 200 QUAD8
3.3. Tested sizes and results#
Identification |
Reference Type |
Value |
Tolerance ( \(\text{\%}\) ) |
Component \(\mathrm{INTE}\text{\_}\mathrm{FH11}\), location \(\mathrm{MDROITE}\) |
“AUTRE_ASTER” |
-2.0E-10 |
|
Component \(\mathrm{INTE}\text{\_}\mathrm{FH11}\), location \(\mathrm{MMIL}\) |
“AUTRE_ASTER” |
2.0E-10 |
|
Component \(\mathrm{INTE}\text{\_}\mathrm{FH11}\), location \(\mathrm{MGAUCHE}\) |
“AUTRE_ASTER” |
2.0E-10 |
|
The hydraulic flow is tested at the first Gauss point of cell \({M}_{401}\) at order number 5:
Identification |
Reference Type |
Value |
Tolerance ( \(\text{\%}\) ) |
Component \(\mathrm{FH11}\) |
“NON_REGRESSION” |
2.00133E-10 |
|
Component \(\mathrm{FH22}\) |
“NON_REGRESSION” |
1.99933E-11 |
|