title: Numerical simulation of unsteady micropolar hemodynamics in a tapered catheterized artery with a combination of stenosis and aneurysm.
abstract: The unsteady flow characteristics of blood are analyzed through a catheterized stenotic artery with post-stenotic dilatation. A rigid tube with a pair of abnormal wall segments in close proximity to each other is employed to geometrically simulate the diseased artery. A micropolar fluid model is used to capture the rheological characteristics of the streaming blood in the annulus. The mild stenosis approximation is employed to derive the governing flow equation which is then solved using a robust finite difference method. Particular attention is paid to the effects of geometrical parameters of the arterial wall and rheological parameters of the blood on axial velocity, flow rate, resistance impedance and wall shear stress. The global behavior of blood is also analyzed through instantaneous pattern of streamlines.
authors.affiliation: Department of Mathematics and Statistics, International Islamic University, Islamabad, 44000, Pakistan. akbarzaman75@yahoo.com.
authors.forename: Akbar
authors.initials: A
authors.lastname: Zaman
authors.affiliation: Department of Mathematics and Statistics, International Islamic University, Islamabad, 44000, Pakistan.
authors.forename: Nasir
authors.initials: N
authors.lastname: Ali
authors.affiliation: Gort - Medical/Aerospace Engineering Sciences, Southmere Avenue, Great Horton, Bradford, BD7 3NU, England, UK.
authors.forename: O
authors.initials: O
authors.lastname: Anwar Bég
mesh_terms: D000465:Algorithms; D000783:Aneurysm / Q000097:blood* / Q000503:physiopathology; D001158:Arteries / Q000502:physiology; D002406:Catheterization, Peripheral; D003198:Computer Simulation; D003251:Constriction, Pathologic / Q000097:blood* / Q000503:physiopathology; D006439:Hemodynamics; D006801:Humans; D008955:Models, Cardiovascular; D008962:Models, Theoretical; D012039:Regional Blood Flow
keywords: Cardiovascular hemodynamics; Catheterized artery; Finite differences; Finite elements; Micropolar rheological model; Unsteady blood flow