4. B modeling#
4.1. Characteristics of B modeling#
Volume modeling: 3D_ HHM
1 mesh HEXA20 of 3D modelling_ HHM: HHM_HEXA20
4.2. Model B result#
Discretization in time: Several time steps (16) to study the evolution of pressure during the transition phase until it stabilizes. The time pattern is implicit \((\theta \mathrm{=}1)\).
List of calculation times in seconds:
\(\mathrm{1,}\mathrm{5,}\mathrm{10,}\mathrm{50,}\mathrm{100,}\mathrm{500,}{10}^{3},5.\times {10}^{3},{10}^{4},5.\times {10}^{4},{10}^{5},5.\times {10}^{5},{10}^{6},5.\times {10}^{6},{10}^{7},{10}^{10}\mathrm{.}\)
The nodal fluid pressure unknowns evaluated in Code_Aster are variations from initial pressures, so this table shows pressure variations in our comparison between the*Code_Aster* calculation and the reference solution. In addition, the pressure variables used in*Code_Aster* to evaluate the laws of behavior are total gas pressure and capillary pressure.
Node/point |
Order number/instant \((s)\) |
Value |
Press \((\mathrm{Pa})\) |
Tolerance |
|
13 to 20/\(A\) and \(B\) |
|
|
-8,565.10-3 |
|
|
\(2(t=5s)\) |
|
-4,282.10-2 |
|
||
\(3(t=10s)\) |
|
-8,565.10-2 |
|
||
\(4(t=50s)\) |
|
-4,282.10-1 |
|
||
\(8(t={5.10}^{3}s)\) |
|
-4,26.10+1 |
|
||
\(16(t={10}^{10}s)\) |
|
-4,996.10+3 |
|
||
\(1(t=1s)\) |
|
6,796.10-6 |
|
||
\(2(t=5s)\) |
|
3,398.10-5 |
|
||
\(3(t=10s)\) |
|
6,796.10-5 |
|
||
\(4(t=50s)\) |
|
3,398.10-4 |
|
||
\(8(t={5.10}^{3}s)\) |
|
3,384.10-2 |
|
||
\(16(t={10}^{10}s)\) |
|
3,964 |
|
||
1 to 8/\(C\) and \(D\) |
|
|
8,565.10-3 |
|
|
\(2(t=5s)\) |
|
4,288.10-2 |
|
||
\(3(t=10s)\) |
|
8,565.10-2 |
|
||
\(4(t=50s)\) |
|
4,282.10-1 |
|
||
\(8(t={5.10}^{3}s)\) |
|
4,26.10+1 |
|
||
\(16(t={10}^{10}s)\) |
|
4,996.10+3 |
|
||
\(1(t=1s)\) |
|
-6,796.10-6 |
|
||
\(2(t=5s)\) |
|
-3,398.10-5 |
|
||
\(3(t=10s)\) |
|
-6,796.10-5 |
|
||
\(4(t=50s)\) |
|
-3,398.10-4 |
|
||
\(8(t={5.10}^{3}s)\) |
|
-3,384.10-2 |
|
||
\(16(t={10}^{10}s)\) |
|
-3,964 |
|