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A viscoelastic fluid–structure interaction model for carotid arteries under pulsatile flow
Author(s) -
Wang Zhongjie,
Wood Nigel B.,
Xu Xiao Yun
Publication year - 2015
Publication title -
international journal for numerical methods in biomedical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.741
H-Index - 63
eISSN - 2040-7947
pISSN - 2040-7939
DOI - 10.1002/cnm.2709
Subject(s) - viscoelasticity , pulsatile flow , mechanics , fluid–structure interaction , carotid arteries , flow (mathematics) , displacement (psychology) , materials science , jump , physics , structural engineering , engineering , finite element method , medicine , surgery , composite material , cardiology , quantum mechanics , psychotherapist , psychology
SUMMARY In this study, a fluid–structure interaction model (FSI) incorporating viscoelastic wall behaviour is developed and applied to an idealized model of the carotid artery under pulsatile flow. The shear and bulk moduli of the arterial wall are described by Prony series, where the parameters can be derived from in vivo measurements. The aim is to develop a fully coupled FSI model that can be applied to realistic arterial geometries with normal or pathological viscoelastic wall behaviour. Comparisons between the numerical and analytical solutions for wall displacements demonstrate that the coupled model is capable of predicting the viscoelastic behaviour of carotid arteries. Comparisons are also made between the solid only and FSI viscoelastic models, and the results suggest that the difference in radial displacement between the two models is negligible. Copyright © 2015 John Wiley & Sons, Ltd.