title: Numerical Study of Turbulent Pulsatile Blood Flow through Stenosed Artery Using Fluid-Solid Interaction.
abstract: The turbulent pulsatile blood flow through stenosed arteries considering the elastic property of the wall is investigated numerically. During the numerical model validation both standard k-ε model and RNG K-ε model are used. Compared with the RNG K-ε model, the standard K-ε model shows better agreement with previous experimental results and is better able to show the reverse flow region. Also, compared with experimental data, the results show that, up to 70% stenosis, the flow is laminar and for 80% stenosis the flow becomes turbulent. Assuming laminar or turbulent flow and also rigid or elastic walls, the results are compared with each other. The investigation of time-averaged shear stress and the oscillatory shear index for 80% stenosis show that assuming laminar flow will cause more error than assuming a rigid wall. The results also show that, in turbulent flow compared with laminar flow, the importance of assuming a flexible artery wall is more than assuming a rigid artery wall.
authors.affiliation: Department of Mechanical Engineering, Isfahan University of Technology, Isfahan 8415683111, Iran.
authors.forename: Mehdi
authors.initials: M
authors.lastname: Jahangiri
authors.affiliation: Department of Mechanical Engineering, Isfahan University of Technology, Isfahan 8415683111, Iran.
authors.forename: Mohsen
authors.initials: M
authors.lastname: Saghafian
authors.affiliation: Department of Biomedical Engineering, University of Isfahan, Isfahan 8174673441, Iran.
authors.forename: Mahmood Reza
authors.initials: MR
authors.lastname: Sadeghi
mesh_terms: D001158:Arteries / Q000473:pathology* / Q000503:physiopathology*; D050197:Atherosclerosis / Q000473:pathology / Q000503:physiopathology; D003198:Computer Simulation; D003251:Constriction, Pathologic; D023921:Coronary Stenosis / Q000473:pathology / Q000503:physiopathology; D004548:Elasticity; D018056:Hemorheology; D006801:Humans; D008955:Models, Cardiovascular; D011673:Pulsatile Flow / Q000502:physiology*