Analysis of Turbulence Impact on generic 3D Aneurysm models with smooth expansion and contraction for Steady flow conditions

Aneurysmal disease, which results in vessel expansion and, in some instances, rupture, is fatal. This work illustrates the steady-state analysis of generic aneurysm models with smooth expansion and contraction with a bulge ratio of D/d ranging from 1.5 to 2.5. These designs were simulated using Reynolds number 1170. This study aims to develop a framework to investigate the various 3D turbulence, namely the standard k-epsilon, RNG k-epsilon-, shear stress transport (SST), and laminar models. This study investigates the flow characteristics in the smooth expansion and contraction pipe at the recirculation zone. These turbulence models are related in terms of velocity profile, the zone where recirculation takes place, WSS, Pressure, and turbulent intensity. One of the most crucial finding results shows that the SST k- model predicts separation flow better than the other two models.