Effects of Stenosis Profile on Hemodynamic and Mass Transport in Axisymmetric Geometries: A Numerical Study

In this study, irregular stenosis profile is considered, with its throat area being varied into three different configurations. Ideal geometries are viable for numerically analyzing hemodynamics under various stenosis severities. Numerical work has been carried out on these stenosis profiles under pulsatile flow conditions using open-source software OpenFOAM. The irregular stenosis profile highly influences wall shear stress and its variations. Significant variations in the amplitude of the WSS profile are observed. These stenosis profiles are liable for higher chances of rupture. Mild stenosis further promotes the aggregation of plaque deposits, which the magnitude of WSS fluctuations can predict. The severity of the stenosis has strongly affected mass transfer near the arterial wall by dominating concentration transport by convection into the lumen region. Convection dominated region is strongly limited to upstream of throat section, predominantly for severe stenosis configurations. Hence, actual representation of the stenosis profile with surface irregularity elucidates hemodynamic and mass transfer phenomenon for a better understanding of diseased condition.