Document Detail


A two-system, single-analysis, fluid-structure interaction technique for modelling abdominal aortic aneurysms.
MedLine Citation:
PMID:  20923114     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
This work reports on the implementation and validation of a two-system, single-analysis, fluid-structure interaction (FSI) technique that uses the finite volume (FV) method for performing simulations on abdominal aortic aneurysm (AAA) geometries. This FSI technique, which was implemented in OpenFOAM, included fluid and solid mesh motion and incorporated a non-linear material model to represent AAA tissue. Fully implicit coupling was implemented, ensuring that both the fluid and solid domains reached convergence within each time step. The fluid and solid parts of the FSI code were validated independently through comparison with experimental data, before performing a complete FSI simulation on an idealized AAA geometry. Results from the FSI simulation showed that a vortex formed at the proximal end of the aneurysm during systolic acceleration, and moved towards the distal end of the aneurysm during diastole. Wall shear stress (WSS) values were found to peak at both the proximal and distal ends of the aneurysm and remain low along the centre of the aneurysm. The maximum von Mises stress in the aneurysm wall was found to be 408kPa, and this occurred at the proximal end of the aneurysm, while the maximum displacement of 2.31 mm occurred in the centre of the aneurysm. These results were found to be consistent with results from other FSI studies in the literature.
Authors:
S C Kelly; M J O'Rourke
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine     Volume:  224     ISSN:  0954-4119     ISO Abbreviation:  Proc Inst Mech Eng H     Publication Date:  2010  
Date Detail:
Created Date:  2010-10-06     Completed Date:  2010-11-30     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8908934     Medline TA:  Proc Inst Mech Eng H     Country:  England    
Other Details:
Languages:  eng     Pagination:  955-69     Citation Subset:  IM    
Affiliation:
School of Electrical, Electronic and Mechanical Engineering, University College Dublin, Rm 304, Centre for Material Science and Engineering, Belfield, Dublin, Ireland.
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MeSH Terms
Descriptor/Qualifier:
Animals
Aorta, Abdominal / physiopathology*
Aortic Aneurysm, Abdominal / physiopathology*
Blood Flow Velocity
Blood Pressure
Computer Simulation
Elastic Modulus
Finite Element Analysis
Humans
Models, Cardiovascular*
Rheology / methods*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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