Non-Newtonian and flow pulsatility effects in simulation models of a stented intracranial aneurysm

作者：Cavazzuti M; Atherton M A^*; Collins M W; Barozzi G S

来源：Proceedings of the Institution of Mechanical Engineers - Part H: Journal of Engineering in Medicine , 2011, 225(H6): 597-609.

DOI：10.1177/09544119JEIM894

• cerebral aneurysm
• stent
• virtual Intracranial Stenting Challenge 2007
• wall shear stress distribution
• pulsatile flow

Three models of different stent designs implanted in a cerebral aneurysm, originating from the Virtual Intracranial Stenting Challenge'07, are meshed and the flow characteristics simulated using commercial computational fluid dynamics (CFD) software in order to investigate the effects of non-Newtonian viscosity and pulsatile flow. Conventional mass inflow and wall shear stress (WSS) output are used as a means of comparing the CFD simulations. In addition, a WSS distribution is presented, which clearly discriminates in favour of the stent design identified by other groups. It is concluded that non-Newtonian and pulsatile effects are important to include in order to avoid underestimating WSS, to understand dynamic flow effects, and to discriminate more effectively between stent designs.

• 出版日期2011