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

Boukedjane Mouloud; Bahi Lakhdar; Boukedjane Mouloud; Bahi Lakhdar

doi:10.3934/biophy.2023019

AIMS Biophysics

2023, Volume 10, Issue 3: 281-316. doi: 10.3934/biophy.2023019

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Research article

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

Boukedjane Mouloud ^{1,2
,
,},
Bahi Lakhdar ¹

1.
Energy Physics Laboratory, Physics Department, Faculty of Exact Sciences, Mentouri Brothers Constantine 1 University, Constantine, Algeria
2.
Physics Department, Faculty of Sciences, 20 Août 1955 University, Skikda, Algeria

Received: 10 June 2023 Revised: 25 August 2023 Accepted: 10 September 2023 Published: 15 September 2023

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.
- hemodynamics,
- rheology,
- CFD,
- pulsatile flow,
- carotid bifurcation
Citation: Boukedjane Mouloud, Bahi Lakhdar. Characterizing pulsatile blood flow in a specific carotid bifurcation: insights into hemodynamics and rheology models[J]. AIMS Biophysics, 2023, 10(3): 281-316. doi: 10.3934/biophy.2023019

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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.

Conflict of interest

The authors declare no conflict of interest.

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