Open AccessA Physiologic Model for the Problem of Blood Flow through Diseased Blood Vessels
Author(s) -
Shachi Shah,
S. U. Siddiqui
Publication year - 2016
Publication title -
international journal of advances in applied sciences
Language(s) - English
Resource type - Journals
eISSN - 2722-2594
pISSN - 2252-8814
DOI - 10.11591/ijaas.v5.i2.pp58-64
Subject(s) - shear stress , laminar flow , mechanics , newtonian fluid , pressure drop , stenosis , axial symmetry , materials science , blood flow , shear rate , compressibility , boundary value problem , mathematics , geometry , physics , composite material , viscosity , medicine , mathematical analysis , cardiology
This study focuses on the behavior of blood flow through diseased artery in the presence of porous effects. The laminar, incompressible, fully developed, non-Newtonian in an artery having axially non-symmetric but radially symmetric stenosis is numerically studied. Here blood is represented as Herschel-Bulkley fluid model and flow model is shown by the Navier-Stokes and the continuity equations. Using appropriate boundary conditions, numerical expression for volumetric flow rate, pressure drop and wall shear stress have been derived. The expressions are computed numerically and results are presented graphically. The effects of porous parameter on wall shear stress, stenosis length, stenosis size and stenosis shape parameter are discussed. The wall shear stress increases as the porous parameter, stenosis size and stenosis length increases, but as the stenosis shape parameter increases, the wall shear stress decreases. The work shows that the results obtained from the porous wall model are significantly different from those obtained by the rigid wall model.