The danger of rupture for severe cases of stenosis and aneurysms is extensively studied by healthcare professionals and researchers. Numerical researchers have likewise played a role in forecasting this rupture. This study offers a numerical computation of a time-dependent three-dimensional arterial flow of Newtonian fluid, examining the influence of stenosis and aneurysm on atherosclerosis-related hemodynamics. The pulsatile blood flow simulation has been executed with the software code of COMSOL Multiphysics using a finite element approach. Results indicate that the stenotic model creates hemodynamic conditions associated with a higher risk of thrombosis compared to the aneurysm model. A higher viscous stress is found in the stenotic model compared to that of the aneurysm model. Higher magnitudes of velocity and pressure are estimated for the stenotic model. It can be concluded that for the same height of stenosis and aneurysm, the stenosis model poses a severe risk to humans.
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