Key result
A fully coupled fluid-structure interaction (FSI) analysis of a human carotid arterial bifurcation model demonstrated a 5 to 11% difference in mean wall shear stress compared to a non-FSI model.
Fluid-structure interaction modeling of the carotid artery demonstrates significant differences in wall shear stress calculations compared to rigid models, which may better identify regions susceptible to atherosclerosis.
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FSI alters carotid WSS estimates versus rigid walls; leaves open whether it improves clinical atherosclerosis risk stratification.
The characteristics of physiological blood flow in human carotid arterial bifurcation model have been numerically studied using a fully coupled fluid-structure interaction (FSI) analysis. This computational model with the fluid-structure interaction is constructed to investigate the flow characteristics and wall shear stress in the carotid artery. As the flow begins to decelerate after the peak flow, a large recirculation zone develops at the non-divider wall of both internal carotid artery (ICA) and external carotid artery (ECA) in FSI model due to the elastic energy stored in the expanding compliant wall. The calculated difference in wall shear stress (WSS) in both Non-FSI and FSI models is a range of between 5 and 11% at the mean WSS. The low WSS corresponds to regions of carotid artery that are more susceptible to atherosclerosis.
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Taewon Seo (2013) studied this question. Fluid-structure interaction (FSI) model vs. Non-FSI model was evaluated on Difference in wall shear stress (WSS) (5-11% difference). A fully coupled fluid-structure interaction (FSI) analysis of a human carotid arterial bifurcation model demonstrated a 5 to 11% difference in mean wall shear stress compared to a non-FSI model.
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