Spatial velocity distributions in pulse-wave propagation based on fluid-structure interaction.

In this paper, spatial velocity distributions in pulse-wave propagation based on a fluid-structure interaction model are presented. The investigation is performed using the assumption of laminar flow and a linear-elastic wall. The fluid-structure interaction scheme is constructed using the finite element method. The results show that velocity distributions embody an obvious time delay in an elastic tube model. Further, the fully developed flow is delayed and the velocity values are increased in comparison with a rigid tube model. The increase in the wall thickness makes the time delay between the velocity peaks of different sites smaller while the time delay between the velocity minima is unchanged. Similarly, the time delay between the velocity bottoms is more easily found when decreasing the internal radius. The model gives valid results for spatial velocity distributions, which provide important information for wave propagation.