3. Modeling A#
3.1. Characteristics of modeling#
The calculation is a linear thermal resolution.
3.2. Characteristics of the mesh#
3.2.1. The calculation mesh#
The initial mesh was created by Salome. He is in degree 1. Before the calculation, the mesh is passed to degree 2 by the command CREA_MAILLAGE.
Number of nodes: |
1106 |
Number of SEG2: |
187 |
Number of TRIA3: |
1954 |
Number of TETRA4: |
3584 |
The groups are defined to be able to follow the borders, apply the material and loads, and perform the final test.
VOLUME |
Volume meshes. |
IN1 |
The face of the inlet of the big pipe. |
IN2 |
The face of the inlet of the small pipe. |
OUT |
The face of the outlet of the big pipe. |
T1_ INT |
The inner side of the big pipe. |
T2_ INT |
The inner side of the small pipe. |
T1_ EXT |
The outer side of the big pipe. |
T2_ EXT |
The outer side of the small pipe. |
IN2_IA |
The 1st internal half-edge of the small pipe inlet. |
IN2_IB |
The 2nd inner half-edge of the small pipe inlet. |
IN2_EA |
The 1st external half-edge of the small pipe inlet. |
IN2_EB |
The 2nd external half-edge of the small pipe inlet. |
INT_EA |
The 1st outer half-edge of the intersection. |
INT_EB |
The 2nd outer half-edge of the intersection. |
INT_IA |
The 1st internal half-edge of the intersection. |
INT_IB |
The 2nd inner half-edge of the intersection. |
POINT |
A node at the intersection of the external faces of pipes. |
Figure 3.2.1-1 .: Initial mesh
3.2.2. The border network#
The initial mesh was created by Salome. He is in degree 1. Its purpose is to define a 1D border numerically. Only the sharp edges of the geometry were meshed, with a fineness an order of magnitude greater than that of the calculation mesh. We chose to discretize each sharp edge of the mesh into 1000 segments.
Number of knots: |
17996 |
Number of SEG2: |
18000 |
We find the same groups as in the calculation mesh, to represent the same geometric locations. Only segment groups exist.
IN2_IA |
The 1st internal half-edge of the small pipe inlet. |
IN2_IB |
The 2nd inner half-edge of the small pipe inlet. |
IN2_EA |
The 1st external half-edge of the small pipe inlet. |
IN2_EB |
The 2nd external half-edge of the small pipe inlet. |
INT_EA |
The 1st outer half-edge of the intersection. |
INT_EB |
The 2nd outer half-edge of the intersection. |
INT_IA |
The 1st internal half-edge of the intersection. |
INT_IB |
The 2nd inner half-edge of the intersection. |
3.3. Features tested#
Orders |
||
MACR_ADAP_MAIL |
|
|
MAILLAGE_FRONTIERE |
||
GROUP_MA_FRONT |
3.4. Tested sizes and results#
The non-regression is tested on a node in the intersection.
Field |
Component |
Value |
\(\mathrm{TEM}\) |
|
370.861930 |
Table 3.4-1 .: Reference values