Pressure boundary condition investigation for side branch in coronary bifurcation simulations

Abstract

Computational fluid dynamics (CFD) research tools have been widely used to investigate the complex hemodynamic behaviour at coronary bifurcations. To quantify the coronary flow distribution at the bifurcation, a scaling law is used to calculate flow rate distribution based on diameter ratio of the side branch (SB) and the distal main vessel. In this case, velocity is often used as the boundary condition at the outlets. However, velocity boundary condition often requires careful treatments of the arterial geometries at the outlets (e.g., extend the outlet, regulate imperfect cross-sectional shapes), which may increase computational demand significantly. Comparing to velocity, pressure is near..