一种血管支架仿真建模与支架内计算流体动力学模拟分析的新方法

Objective: Establish a novel method of simulation modeling of stent and intra-stent computational fluid dynamics simulation analysis. Method: Stent simulation model is designed by Pro/engineer wildfire3.0,the diameter of stent is 10mm, length is 16mm,thickness is 0.5mm.The model include four stent ring which length is 4mm.Every stent ring contain six V-style unit. Fluid models are built up by importing these stent models into computational fluid dynamics software ansys11.0-CFX, then CFD analysis is proceed to study the effect of stent structure on hemodynamics. Result: Stent stimulation model with diamond style mesh is built. According to the analysis of computational fluid dynamics, the low velocity and eddy areas(blue-green area) locate in the both flanks of stent structure, the percentage of low wall shear stress on the surface of models(deep blue area, wall shear stress range from 0 to 0.56 Pa) is 8.21％. Conclusion: A feasible new method of simulation modeling of stent and intra-stent computational fluid dynamics simulation analysis can be established by using Pro/engineer wildfire3.0 and ansys11.0-CFX.