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The unsteady power law blood flow through a multiirregular stenosed artery

Mustapha, Norzieha and Amin, Norsarahaida (2008) The unsteady power law blood flow through a multiirregular stenosed artery. Matematika, 24 (2). pp. 189-200. ISSN 0127-8274

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Abstract

A non-Newtonian pulsatile model of blood flow through multiple stenoses with irregular surfaces is considered. The model chosen is the generalized power law model of blood viscocity where the flow is assumed to be unsteady, laminar, two dimensional and axisymmetric. The governing equations of motion in terms of the viscous shear stress and the boundary conditions in the cylindrical coordinate system are first transformed using a radial coordinate transformation before they are discretized using a finite difference scheme based on central difference approximations on non-uniform grids. The numerical results obtained in terms of blood flow characterictics show that the values of the axial velocity and flow rate in the power-law model are lower while the resistance to flow and the wall shear stress are higher compared to the Newtonian model. These features concur with the general observations of blood flowing through small stenosed arteries.

Item Type:Article
Uncontrolled Keywords:power-law, multi-irregular, stenosed artery, blood flow, non-newtonian
Subjects:Q Science > QA Mathematics
Q Science > QH Natural history > QH301 Biology
Divisions:Science
ID Code:8499
Deposited By: Norshiela Buyamin
Deposited On:05 May 2009 05:11
Last Modified:02 Jun 2010 01:55

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