Journal of Pure and Applied Mathematics: Advances and ApplicationsAuthor's: BURASKORN NUNTADILOK, JULIAN POULTER, PICHIT BOONKRONG and BENCHAWAN WIWATANAPATAPHEE
Pages: [81] - [106]
Received Date: February 8, 2013
Submitted by:
In this work, we investigate the pulsatile blood flow in the human
coronary artery system with no graft and with a bypass graft. The
computational domain consists of the ascending aorta, the aortic arch,
the proximal left coronary artery (LCA), the right coronary artery
(RCA), and a graft. Blood is assumed to be an incompressible
non-Newtonian fluid. The motion of blood flow is governed by the
continuity equation and the Navier-Stokes equations with pulsatile
conditions on the boundaries. The governing equations are solved by
using the finite element method. Disturbances of blood flow through
the stenosed RCA with no graft and with a bypass graft for the degree
of stenotic flow restrictions 
and 
are investigated. The numerical results
show that the blood pressure drops dramatically, the shear rate tends
to increase in the stenosis area, and the maximal RCA flow decreases
as the degree of stenosis increases. Additionally, the results also
show that the coronary artery system with a bypass graft can increase
the maximal flow in the stenosed RCA, improve the blood pressure, and
decrease the shear rate in the stenosis region.
blood flow, coronary artery bypass graft, incompressible non-Newtonian fluid, stenosis.
