Forced convection heat transfer within a moderately-stenosed, patient-specific carotid bifurcation

• Published in: International journal of numerical methods for heat & fluid flow Vol. 22; no. 8; pp. 1120 - 1134
• Main Authors: Bevan, Rhodri L.T, Lewis, Roland W, Nithiarasu, Perumal
• Format: Journal Article
• Language: English
• Published: Emerald Group Publishing Limited 01.01.2012
• Subjects: Bifurcations; Forced convection; Heat transfer; Mathematical models; Navier-Stokes equations; Numerical analysis; Temperature gradient; Wall shear stresses; Forced convection; Patient-specific; Carotid artery; Convection; Heat transfer; Finite element; Blood flow
• ISSN: 0961-5539; 1758-6585
• DOI: 10.1108/09615531211271907

Purpose - The purpose of this paper is to numerically model forced convection heat transfer within a patient-specific carotid bifurcation and to examine the relationship between the temperature and wall shear stress.Design methodology approach - The procedure employs a parallel, fully explicit (matrix free) characteristic based split scheme for the solution of incompressible Navier-Stokes equations.Findings - The arterial wall temperature, rather than the blood temperature dominates the regions of low wall shear stress and high oscillating shear stress. Additionally, negligible temperature gradient was detected proximal to the arterial wall in this locality.Originality value - The presented results demonstrate a possible mechanism for cold air temperature to influence the atherosclerotic plaque region proximal to the stenosis. The proposed patient-specific heat transfer analysis also provides a starting point for the investigation of the influence of induced hypothermia on carotid plaque and its stability.