Artery Research

Volume 22, Issue C, June 2018, Pages 24 - 35

Numerical modeling of a prototype cardiac assist device by implementing fluid-structure interaction

Authors
Shahrokh Rahmania, Mehrnaz Oveysia, Alireza Heidarib, Mahdi Navidbakhsha, *, Mansour Alizadeha
aSchool of Mechanical Engineering, Iran University of Science and Technology, Tehran 16846, Iran
bStructural Biomechanics, Structures Division, Department of Civil Engineering, Faculty of Engineering, University of Tehran, Iran
*Corresponding author. School of Mechanical Engineering, Iran University of Science and Technology, Tehran 16846, Iran. Fax: +98 21 77240488. E-mail address: mnavid@iust.ac.ir (M. Navidbakhsh).
Corresponding Author
Mahdi Navidbakhsh
Received 6 October 2017, Revised 9 January 2018, Accepted 12 January 2018, Available Online 20 March 2018.
DOI
10.1016/j.artres.2018.01.002How to use a DOI?
Keywords
Heart failure; Cardiac assist device; Fluid–structure interaction analysis; Von Mises stress
Abstract

The purpose of this study is to simulate the blood flow in a 2D axisymmetric model for the aorta assisted with a type of cardiac assist device in which the balloon part is surrounding the ascending aorta and can pump the blood flow by its inflation/deflation. The blood flow and von Mises stress in the assisted aorta are investigated by fluid–structure interaction analysis (FSI). Taking into consideration three materials and seven thicknesses for the balloon in one layered and three-layered aorta models, the influences of each of these states on the mentioned parameters have been studied. The numerical simulation demonstrates that by using this cardiac assist device, the maximum blood flow velocity increases up to 92% at the time of maximum pressure on the balloon and this configuration augments the maximum von Mises stress. The magnitude of the maximum von Mises stress and the maximum blood velocity reduce by thickening the balloon from 0.8 mm to 2 mm up to 8.9% and 9.95%, respectively. The maximum pressure at the outlet of the aorta increases from 9.77 kPa to 10.4 kPa at the time of applying maximum pressure on the balloon. With the one-layered aorta model, the maximum von Mises stress occurs at the innermost layer of the aorta’s wall on each line across the wall and the balloon. Using the three-layered aorta model, the location of the maximum stress is shifted to the juncture of intima and media layers.

Copyright
© 2018 Association for Research into Arterial Structure and Physiology. Published by Elsevier B.V. All rights reserved.
Open Access
This is an open access article distributed under the CC BY-NC license.

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Journal
Artery Research
Volume-Issue
22 - C
Pages
24 - 35
Publication Date
2018/03/20
ISSN (Online)
1876-4401
ISSN (Print)
1872-9312
DOI
10.1016/j.artres.2018.01.002How to use a DOI?
Copyright
© 2018 Association for Research into Arterial Structure and Physiology. Published by Elsevier B.V. All rights reserved.
Open Access
This is an open access article distributed under the CC BY-NC license.

Cite this article

TY  - JOUR
AU  - Shahrokh Rahmani
AU  - Mehrnaz Oveysi
AU  - Alireza Heidari
AU  - Mahdi Navidbakhsh
AU  - Mansour Alizadeh
PY  - 2018
DA  - 2018/03/20
TI  - Numerical modeling of a prototype cardiac assist device by implementing fluid-structure interaction
JO  - Artery Research
SP  - 24
EP  - 35
VL  - 22
IS  - C
SN  - 1876-4401
UR  - https://doi.org/10.1016/j.artres.2018.01.002
DO  - 10.1016/j.artres.2018.01.002
ID  - Rahmani2018
ER  -