Unsteady Two-Dimensional Blood Flow in Porous Artery with Multi-Irregular Stenoses |
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Authors: | Obaid Ullah Mehmood Norzieha Mustapha Sharidan Shafie |
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Institution: | 1.Department of Mathematics, Faculty of Science,Universiti Teknologi Malaysia,Skudai,Malaysia |
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Abstract: | The flow characteristics of an unsteady axisymmetric two-dimensional (2D) blood flow in a diseased porous arterial segment
with flexible walls are investigated. The arterial walls mimic the irregular constrictions whereas the lumen containing the
thrombus, cholesterol, and fatty plaques represents the porous medium. The governing equations with appropriate initial and
boundary conditions are solved numerically using MAC method. The discretization is done on staggered grid with non-uniform
grid size and pressure-poisson equation is solved following SOR method. The pressure and velocity corrections are made cyclically
until the steady state is achieved. It is observed that for decreasing permeability, flow is highly decelerated while pressure
drop and wall shear stress increases. The separation zones and re-circulation regions are found for severe stenoses. Flow
separation and re-circulation diminishes for decreasing permeability of the porous medium. Comparisons are provided with published
experimental and numerical results. |
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