## 3 Results and Discussion  
Figure 7 shows the TAWSS magnitude on the aneurysm surface of each model, as well as for each pressure condition under study. As can be seen, in 5 of 6 models, the ISH condition presented the highest values, up to almost 120% higher than in the normal condition. This is curious and interesting since, intuitively, it could be expected that the highest TAWSS presented the condition with highest pressures (hypertension), a situation \begin{table}
\begin{tabular}{c c c c} \hline \hline
**A** & \begin{tabular}{c} **Skewness** \\ **(Maximum)** \\ \end{tabular} & \
\begin{tabular}{c} **Orthogonal Quality** \\ **(Minimum)** \\ \end{tabular} &
\begin{tabular}{c} **Aspect Ratio** \\ **(Maximum)** \\ \end{tabular} \\ \hline
1 & 0.81695 & 0.18305 & 8.80420 \\
2 & 0.86274 & 0.10972 & 11.83121 \\
3 & 0.85771 & 0.14229 & 9.69181 \\
4 & 0.82012 & 0.17988 & 11.16402 \\
5 & 0.83572 & 0.12418 & 9.79063 \\
6 & 0.83613 & 0.16387 & 12.71124 \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Final mesh quality parameters for each aneurysm model. Figure 6: (**a**) Tetrahedral mesh for fluid domain and boundary conditions. (**b**) Triangles mesh for solid domain and boundary conditions. Corresponds to A-6 model. that did not occur. This exception occurred in the A-3 model, where the hypertension condition presented the highest magnitude, followed by ISH. Moreover, in A-5 there were only minor changes between the three different pressure conditions, and with hypertension presenting a slightly decrease in contrast to a normal condition. This behavior for A-3 and A-5 model showed that fluid-solid interaction phenomena and so the hemodynamics effects and magnitudes on the arterial wall were strongly dependent on the aneurysm type and geometry. Nevertheless, that in 5 of 6 models the ISH presented the highest wall shear stress magnitude could be an important result that should be validated through analysis of a higher number of cerebral aneurysm models, and thus, establish a possible trend in the hemodynamic behavior. Figure 8 shows the magnitude of the WSS for the A-1 model at the two cardiac cycles of the simulation, where it is clearly observable how the wall shear stresses increased drastically at systole time when passing from the normal condition to a hypertension condition, and even more when passing to a ISH condition. Figure 8: WSS for A-1 model at aneurysm surface and at the entire cardiac cycle. Figure 7: TAWSS at aneurysm surface, for each model and pressure condition. More specifically, Figure 9 shows the magnitude and wall surface distribution of the WSS at systole of the cardiac cycle (SWSS) for the A-1 model, where it is possible to appreciate how the wall shear stresses increased drastically when passing from the normal condition to a ISH or hypertension condition. At this stage of the cardiac cycle, the ISH condition presented averaged shear stresses up to 180% higher than in the normal condition, and ~40% higher than the hypertension condition. Analogous to the previous parameter, in Figure 10, the OSI magnitude is presented, where it is possible to observe how there was a considerable increase when passing to an ISH condition and hypertension, except for the A-1 model (ruptured) where there were minor changes. At the same time, it is once again interesting to notice that in 5 of the 6 models the ISH condition presented the highest magnitudes, with increases in the OSI of up to 300% compared to a normal condition. As an example, in Figure 11 the magnitude and distribution of the OSI for the A-3 model is presented, and it is clearly observable how the ISH condition presented a drastic increase with respect to the normal condition, as well as when compared to the hypertensive condition. Likewise, as TAWSS, this variable result showed that abrupt hemodynamic changes may occur, depending on the type of aneurysm and its geometry.