Figure 6a Mesh number 2D SBVC2 SBVC3 17 0.015 0.007 0.006 8 0.020 0.008 0.007 4 0.025 0.017 0.015 1 0.025 0.025 0.025 Figure 6b Mesh number 2D SBVC2 SBVC3 17 0.025 0.006 0.003 8 0.027 0.012 0.007 4 0.029 0.013 0.012 1 0.032 0.032 0.032