title: Pulsatile spiral blood flow through arterial stenosis.
abstract: Pulsatile spiral blood flow in a modelled three-dimensional arterial stenosis, with a 75% cross-sectional area reduction, is investigated by using numerical fluid dynamics. Two-equation k-ω model is used for the simulation of the transitional flow with Reynolds numbers 500 and 1000. It is found that the spiral component increases the static pressure in the vessel during the deceleration phase of the flow pulse. In addition, the spiral component reduces the turbulence intensity and wall shear stress found in the post-stenosis region of the vessel in the early stages of the flow pulse. Hence, the findings agree with the results of Stonebridge et al. (2004). In addition, the results of the effects of a spiral component on time-varying flow are presented and discussed along with the relevant pathological issues.
authors.affiliation: a CFD Group, System, Power & Energy Research Division, School of Engineering, University of Glasgow , Glasgow G12 8QQ , UK.
authors.forename: Fabian
authors.initials: F
authors.lastname: Linge
authors.forename: Md Abdul
authors.initials: MA
authors.lastname: Hye
authors.forename: Manosh C
authors.initials: MC
authors.lastname: Paul
mesh_terms: D001783:Blood Flow Velocity / Q000502:physiology*; D016893:Carotid Stenosis / Q000503:physiopathology*; D003198:Computer Simulation; D003251:Constriction, Pathologic; D003430:Cross-Sectional Studies; D006439:Hemodynamics; D006801:Humans; D008955:Models, Cardiovascular; D008962:Models, Theoretical; D011312:Pressure; D011673:Pulsatile Flow / Q000502:physiology*; D013314:Stress, Mechanical; D018608:Ultrasonography, Doppler
keywords: arterial stenosis; pulsatile blood flow; spiral; swirl flows; turbulence