Characterizing pulsatile blood flow in a specific carotid bifurcation: insights into hemodynamics and rheology models

IF 1.1 Q4 BIOPHYSICS
Boukedjane Mouloud, Bahi Lakhdar
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引用次数: 0

Abstract

This study uses laminar and turbulent flow models to investigate the blood flow dynamics in a specific carotid bifurcation. Pulsatile boundary conditions and the rigid carotid artery wall are considered. Three viscosity models describe the non-Newtonian blood behavior. The Fluent solver and the finite volume method solve the equations. Results show a Poiseuille-like flow in the common carotid artery (CCA), unaffected by the flow regime, viscosity model, or boundary conditions. The branching zone exhibits a C-shaped stagnation zone with low velocity and wall shear stress due to the CCA widening and ICA/ECA curvature. Strong secondary flow is observed in the carotid sinus; the flow is directed towards the inner wall with higher velocity in the internal carotid artery. Discrepancies between viscosity models are pronounced in laminar flow, particularly with the natural boundary conditions. The non-Newtonian blood behavior is more apparent in the laminar flow of the external carotid artery, especially with the second set of boundary conditions.

表征特定颈动脉分支的脉动血流:对血流动力学和流变学模型的见解
& lt; abstract>本研究采用层流和湍流模型来研究特定颈动脉分支的血流动力学。考虑了脉动边界条件和颈动脉壁刚性。三种粘度模型描述了非牛顿血液的行为。采用Fluent求解器和有限体积法求解。结果显示颈总动脉(CCA)有泊泽维尔样流动,不受流动状态、粘度模型或边界条件的影响。由于CCA变宽和ICA/ECA曲率,分支区表现为低速和低壁剪应力的c型停滞区。颈动脉窦内可见强烈的二次血流;血流以较快的速度在颈内动脉流向内壁。在层流中,粘度模型之间的差异是明显的,特别是在自然边界条件下。非牛顿血液行为在颈外动脉层流中更为明显,特别是在第二组边界条件下。& lt; / abstract>
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来源期刊
AIMS Biophysics
AIMS Biophysics BIOPHYSICS-
CiteScore
2.40
自引率
20.00%
发文量
16
审稿时长
8 weeks
期刊介绍: AIMS Biophysics is an international Open Access journal devoted to publishing peer-reviewed, high quality, original papers in the field of biophysics. We publish the following article types: original research articles, reviews, editorials, letters, and conference reports. AIMS Biophysics welcomes, but not limited to, the papers from the following topics: · Structural biology · Biophysical technology · Bioenergetics · Membrane biophysics · Cellular Biophysics · Electrophysiology · Neuro-Biophysics · Biomechanics · Systems biology
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