Fluid-structure interaction modeling of a patient-specific cerebral aneurysm

Influence of structural modeling

Ryo Torii, Marie Oshima, Toshio Kobayashi, Kiyoshi Takagi, Tayfun E. Tezduyar

Research output: Contribution to journalArticle

111 Citations (Scopus)

Abstract

Fluid-structure interaction (FSI) simulations of a cerebral aneurysm with the linearly elastic and hyper-elastic wall constitutive models are carried out to investigate the influence of the wall-structure model on patient-specific FSI simulations. The maximum displacement computed with the hyper-elastic model is 36% smaller compared to the linearly elastic material model, but the displacement patterns such as the site of local maxima are not sensitive to the wall models. The blood near the apex of an aneurysm is likely to be stagnant, which causes very low wall shear stress and is a factor in rupture by degrading the aneurysmal wall. In this study, however, relatively high flow velocities due to the interaction between the blood flow and aneurysmal wall are seen to be independent of the wall model. The present results indicate that both linearly elastic and hyper-elastic models can be useful to investigate aneurysm FSI.

Original languageEnglish
Pages (from-to)151-159
Number of pages9
JournalComputational Mechanics
Volume43
Issue number1
DOIs
Publication statusPublished - 2008 Dec
Externally publishedYes

Fingerprint

Cerebral Aneurysm
Structural Modeling
Fluid structure interaction
Fluid
Interaction
Modeling
Aneurysm
Linearly
Blood
Model
Model structures
Wall Shear Stress
Constitutive models
Flow velocity
Apex
Rupture
Elastic Material
Blood Flow
Constitutive Model
Shear stress

Keywords

  • Cerebral aneurysm
  • Fluid-structure interaction
  • Patient-specific modeling
  • Structural model

ASJC Scopus subject areas

  • Ocean Engineering
  • Mechanical Engineering
  • Computational Theory and Mathematics
  • Computational Mathematics
  • Applied Mathematics

Cite this

Fluid-structure interaction modeling of a patient-specific cerebral aneurysm : Influence of structural modeling. / Torii, Ryo; Oshima, Marie; Kobayashi, Toshio; Takagi, Kiyoshi; Tezduyar, Tayfun E.

In: Computational Mechanics, Vol. 43, No. 1, 12.2008, p. 151-159.

Research output: Contribution to journalArticle

Torii, Ryo ; Oshima, Marie ; Kobayashi, Toshio ; Takagi, Kiyoshi ; Tezduyar, Tayfun E. / Fluid-structure interaction modeling of a patient-specific cerebral aneurysm : Influence of structural modeling. In: Computational Mechanics. 2008 ; Vol. 43, No. 1. pp. 151-159.
@article{d306b3d3b7b34ec986c6a88cacefa8b3,
title = "Fluid-structure interaction modeling of a patient-specific cerebral aneurysm: Influence of structural modeling",
abstract = "Fluid-structure interaction (FSI) simulations of a cerebral aneurysm with the linearly elastic and hyper-elastic wall constitutive models are carried out to investigate the influence of the wall-structure model on patient-specific FSI simulations. The maximum displacement computed with the hyper-elastic model is 36{\%} smaller compared to the linearly elastic material model, but the displacement patterns such as the site of local maxima are not sensitive to the wall models. The blood near the apex of an aneurysm is likely to be stagnant, which causes very low wall shear stress and is a factor in rupture by degrading the aneurysmal wall. In this study, however, relatively high flow velocities due to the interaction between the blood flow and aneurysmal wall are seen to be independent of the wall model. The present results indicate that both linearly elastic and hyper-elastic models can be useful to investigate aneurysm FSI.",
keywords = "Cerebral aneurysm, Fluid-structure interaction, Patient-specific modeling, Structural model",
author = "Ryo Torii and Marie Oshima and Toshio Kobayashi and Kiyoshi Takagi and Tezduyar, {Tayfun E.}",
year = "2008",
month = "12",
doi = "10.1007/s00466-008-0325-8",
language = "English",
volume = "43",
pages = "151--159",
journal = "Computational Mechanics",
issn = "0178-7675",
publisher = "Springer Verlag",
number = "1",

}

TY - JOUR

T1 - Fluid-structure interaction modeling of a patient-specific cerebral aneurysm

T2 - Influence of structural modeling

AU - Torii, Ryo

AU - Oshima, Marie

AU - Kobayashi, Toshio

AU - Takagi, Kiyoshi

AU - Tezduyar, Tayfun E.

PY - 2008/12

Y1 - 2008/12

N2 - Fluid-structure interaction (FSI) simulations of a cerebral aneurysm with the linearly elastic and hyper-elastic wall constitutive models are carried out to investigate the influence of the wall-structure model on patient-specific FSI simulations. The maximum displacement computed with the hyper-elastic model is 36% smaller compared to the linearly elastic material model, but the displacement patterns such as the site of local maxima are not sensitive to the wall models. The blood near the apex of an aneurysm is likely to be stagnant, which causes very low wall shear stress and is a factor in rupture by degrading the aneurysmal wall. In this study, however, relatively high flow velocities due to the interaction between the blood flow and aneurysmal wall are seen to be independent of the wall model. The present results indicate that both linearly elastic and hyper-elastic models can be useful to investigate aneurysm FSI.

AB - Fluid-structure interaction (FSI) simulations of a cerebral aneurysm with the linearly elastic and hyper-elastic wall constitutive models are carried out to investigate the influence of the wall-structure model on patient-specific FSI simulations. The maximum displacement computed with the hyper-elastic model is 36% smaller compared to the linearly elastic material model, but the displacement patterns such as the site of local maxima are not sensitive to the wall models. The blood near the apex of an aneurysm is likely to be stagnant, which causes very low wall shear stress and is a factor in rupture by degrading the aneurysmal wall. In this study, however, relatively high flow velocities due to the interaction between the blood flow and aneurysmal wall are seen to be independent of the wall model. The present results indicate that both linearly elastic and hyper-elastic models can be useful to investigate aneurysm FSI.

KW - Cerebral aneurysm

KW - Fluid-structure interaction

KW - Patient-specific modeling

KW - Structural model

UR - http://www.scopus.com/inward/record.url?scp=52549126204&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=52549126204&partnerID=8YFLogxK

U2 - 10.1007/s00466-008-0325-8

DO - 10.1007/s00466-008-0325-8

M3 - Article

VL - 43

SP - 151

EP - 159

JO - Computational Mechanics

JF - Computational Mechanics

SN - 0178-7675

IS - 1

ER -