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http://dx.doi.org/10.3795/KSME-B.2014.38.1.063

Effect of Stent Design Porosity on Hemodynamics Within Cerebral Aneurysm Model: Numerical Analysis  

Phan, Dai Thanh (School of Mechanical Engineering, Univ. of Ulsan)
Lee, Sang-Wook (School of Mechanical Engineering, Univ. of Ulsan)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.38, no.1, 2014 , pp. 63-70 More about this Journal
Abstract
In the present study, CFD simulations were conducted for investigating intra-aneurysmal flow characteristics with different stent porosities ($C_{\alpha}$ = 80%, 74%, and 64%), and the simulation results were compared with experimental data. Using a quadratic tetrahedral element-based finite element scheme, we estimated velocity fields and wall shear stress. The intra-aneurysmal velocity reduction ratios obtained via simulation agree well with published experimental data. It was found that a stent with a porosity of 80%, which is highest in the present study, is able to effectively reduce flow into the aneurysm, which causes intra-aneurysmal stasis, and that stents with lower porosities afford only incremental benefits in reducing inflow to an aneurysm.
Keywords
Cerebral Aneurysm; Stent; Porosity; Hemodynamics; CFD; Wall Shear Stress; Velocity Reduction Ratio;
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