Interactions between oscillatory flow and spasmic coronary artery - A FVM study with prescribed moving wall

A FVM (finite volume method) computational system has been developed to investigate the interactions between oscillatory flow and spasmic coronary artery with prescribed moving wall. Computational analyses of the unsteady blood flow induced by the interactions between moving wall and oscillatory flow are presented by using a self-developed, effective, FVM-based NS solver (Liu, 1997) with global conservation in a boundarey-fitted coordinate (BFC) system. Two extensive studies of the oscillatory flow induced by a flushing in/out indentation with fully developed flow at inlet (Poiseuille flow) , and by a fixed asymmetric indentation with pulsatile inlet flow were conducted to investigate geometric and kinematics effects of the unsteady flow with the prescribed moving wall in blood vessel. The present study gives results concerning the variability of WSS(wall shear stress) both in space and in time, which enhances our understanding for the self-excited oscillations that develop when fluid flows through an externally compressed collapsible tube.