Abstract
Activated inflammatory cells placed in atherosclerotic plaques release heat while the plaque is cooled by blood flow. Temperature heterogeneity in plaque can cause thermal stress, and speeds up plaque growth or rupture process. In the present work, arterial wall temperature distribution of atherosclerotic Right Coronary with nonNewtonian blood flow is investigated by numerical methods. The rheology of the flowing blood is modeled by a generalized Power law model. An advanced algorithm with coupled FEM-FVM is used to determine temperature distribution inside the artery. Transient Navier-Stokes and energy equations in 2D idealized arterial model of a bending artery are discretized using the Finite-Volume Method and solved by SIMPLE algorithm in curvilinear coordinate to analyze pulsatile blood flow, whereas the transient heat conduction equation in the plaque is solved simultaneously with these equations using Finite-Element Method. The plaque temperature, Nusselt Number and heat flux at the plaque/lumen interface is obtained for various moments of cardiac cycle and different Power law indices (n) to investigate influence of blood viscosity on cooling effect of blood. It is observed that how blood dilution modifies the temperature heterogeneity of plaque and decreases probability of rupture of Atherosclerotic plaque.
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