A pulsatile suspension flow simulation in a stenosed vessel

A nonlinear pulsatile suspension flow in a stenosed vessel has been numerically analyzed. A transient UVP finite element method (FEM) and a stable time integration scheme, based on a predictor-character strategy, with constant error monitoring have been employed in the computational study. The pulsatile suspension flow is characterized by analyzing the flow, pressure and stress fields. Effects of the nonlinear particulate phase on the nonlinear suspending fluid phase are clearly brought out by comparing the suspension flow results with that of the corresponding homogeneous flow. Particles are seen to dampen the flow velocity, wall pressure and the wall shear stress. In the presence of the particles, fatter and longer recirculation regions both upstream and downstream to the stenosis are seen. Suspension flows are found to have greater variations in the pressure normal to the central axis. Also, their wall shear stress is found to be both high and alternating in direction.