Critical evaluation of three hemodynamic models for the numerical simulation of intra-stent flows
Article dans une revue avec comité de lecture
Date
2015Journal
Journal of BiomechanicsAbstract
We evaluate here three hemodynamic models used for the numerical simulation of bare and stented artery flows. We focus on two flow features responsible for intra-stent restenosis: the wall shear stress and the re-circulation lengths around a stent. The studied models are the Poiseuille profile, the simplified pulsatile profile and the complete pulsatile profile based on the analysis of Womersley. The flow rate of blood in a human left coronary artery is considered to compute the velocity profiles. “Ansys Fluent 14.5” is used to solve the Navier–Stokes and continuity equations. As expected our results show that the Poiseuille profile is questionable to simulate the complex flow dynamics involved in intra-stent restenosis. Both pulsatile models give similar results close to the strut but diverge far from it. However, the computational time for the complete pulsatile model is five times that of the simplified pulsatile model. Considering the additional “cost” for the complete model, we recommend using the simplified pulsatile model for future intra-stent flow simulations.
Files in this item
Related items
Showing items related by title, author, creator and subject.
-
Communication avec acteThis work assesses three hemodynamic models for the numerical modeling of intra-stent flows. These are the classical Poiseuille model (PM), the simplified pulsatile model (SPM) and the complete pulsatile model (CPM) based ...
-
Article dans une revue avec comité de lectureCHABI, Fatiha; NOGUERA, Ricardo; MAUREL, Blandine; CHAMPMARTIN, Stephane; SARRAF, Christophe (icmmb19.org, 2014)A design study of propeller hydrokinetic turbines is explored in the present paper, where the optimized blade geometry is determined by the classical Glauert theory applicable to the design of axial flow turbines (hydrokinetic ...
-
Article dans une revue avec comité de lectureABBASNEZHAD, Navideh; SHIRINBAYAN, Mohammadali; CHABI, Fatiha; CHAMPMARTIN, Stephane; TCHARKHTCHI, Abbas; BAKIR, Farid (MDPI AG, 2021)Drug-eluting stents are desirable platforms for local medicine delivery. However, the incorporation of drugs into polymers can influence the mechanical and physicochemical properties of said matrix, which is a topic that ...
-
Article dans une revue avec comité de lectureThis paper aims to investigate, by means of numerical simulation, the effect of gap profiles on the calculation of the pressure distortion coefficient (λ) and the piston fall rate (vf) of two piston-cylinder units used in ...
-
Article dans une revue avec comité de lectureSome projects such as the EUROMET project 463 have underlined the lack of agreement between experimental measurements and calculations by the finite element method (FEM), used to determine the piston fall rate of a ...