Artery Research

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Volume 7, Issue 3-4, September 2013, Pages 153 - 154

P6.03 A FSI MODEL OF CAROTID ARTERIES WITH VISCOELASTIC WALL BEHAVIOUR

Authors
Z. Wang, X.Y. Xu, N.B. Wood
Department of Chemical Engineering and Chemical Technology, Imperial College London, South Kensington Campus, London, United Kingdom
Available Online 11 November 2013.
DOI
10.1016/j.artres.2013.10.184How to use a DOI?
Abstract

Objectives: Human carotid arteries exhibit viscoelastic behaviour characterised by hysteresis of the pressure-diameter relation and longitudinal wall motion1. Ultrasound techniques have been used to measure vessel wall displacements, as well as pressure and diameter waveforms, from which viscoelastic properties can be derived2. The aim of this study is to develop a fully-coupled numerical model for pulsatile flow in human arteries with viscoelastic wall behaviour.

Methods: An idealized common carotid arterial geometry was adopted first, so that comparison could be made between the numerical and analytical solutions. A linear viscoelastic material model was employed where Prony series were used to describe shear and bulk moduli3. The flow was assumed to be laminar flow, and physiologically realistic pressure and flow waveforms were imposed at the model inlet and outlet respectively4. Two-way coupling of fluid structure interaction was achieved by combining Ansys and Fluent.

Results: It was found that the viscoelastic behaviour of the vessel wall caused a phase lag between the radial wall distension and pressure waveform, as shown in Figure 1. The predicted pressure-diameter hysteresis loop (Figure 2) is in good agreement with the analytical solution. The numerical model presented here is being extended to realistic carotid arteries with and without the influence of arterial diseases (e.g. hypertension and atherosclerosis).

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<Previous Article In Issue
Next Article In Issue>
Journal
Artery Research
Volume-Issue
7 - 3-4
Pages
153 - 154
Publication Date
2013/11/11
ISSN (Online)
1876-4401
ISSN (Print)
1872-9312
DOI
10.1016/j.artres.2013.10.184How to use a DOI?
Open Access
This is an open access article distributed under the CC BY-NC license.

Cite this article

risenwbib
TY  - JOUR
AU  - Z. Wang
AU  - X.Y. Xu
AU  - N.B. Wood
PY  - 2013
DA  - 2013/11/11
TI  - P6.03 A FSI MODEL OF CAROTID ARTERIES WITH VISCOELASTIC WALL BEHAVIOUR
JO  - Artery Research
SP  - 153
EP  - 154
VL  - 7
IS  - 3-4
SN  - 1876-4401
UR  - https://doi.org/10.1016/j.artres.2013.10.184
DO  - 10.1016/j.artres.2013.10.184
ID  - Wang2013
ER  -