Numerical simulation of unsteady biomedical flows

Solutions of unsteady internal flows which are of interest in biomedical studies are presented. Pulsatile flows in a channel with a step constriction and in a cylindrical duct with closed end were examined. The steady motion was imposed by the time variation of the inflow axial velocity. The solution was obtained for laminar flow and low Mach number. The low Mach number compressible solution in a channel with a step construction was in good agreement with the incompressible LDV measurements. The velocities in the confined duct were in good agreement with numerical results presented in the literature. The authors demonstrated the ability of the numerical scheme to capture complex unsteady phenomena such as large separated regions and vortical structures, whose study is of interest in biomechanics