Sequential Methods for Coupled Geomechanics and Multiphase Flow

4.4. NUMERICAL EXAMPLES 103
Dimensionless distance (z/Lz)
Dimensionless distance (z/Lz)
2
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
Drained (Iteration vs Refined ∆ t d )
∆ t d =2.6×10 −4 1 iteration
∆ t d =5.2×10 −4 2 iterations
True Solution
0
0 0.2 0.4 0.6 0.8 1
Dimensionless pressure P =(P−P )/∆p
d i i
2
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
Drained (Iteration vs Refined ∆ t d )
∆ t d =2.6×10 −4 1 iteration
∆ t d =5.2×10 −4 2 iterations
True solution
0
0 0.005 0.01 0.015 0.02 0.025
Dimensionless displacement (u =u/L )
d z
Figure 4.7: Comparison between more iterations and refined time step size in the drained
split for Case 4.1: pressure (top) and displacement (bottom). The coupling strength is close
to one (τ = 0.95).