Publisher DOI: 10.1016/j.camwa.2017.04.012
Title: The influence of geometric imperfections in cardiovascular FSI simulations
Language: English
Authors: Radtke, Lars 
König, Marcel 
Düster, Alexander 
Keywords: cardiovascular fluid–structure interaction; end-to-end anastomosis; soft tissue material; partitioned solution approach
Issue Date: 2017
Publisher: Elsevier
Source: Computers & Mathematics with Applications 7 (74): 1675-1689 (2017)
Abstract (english): 
We present a study of the fluid–structure interaction in an idealized end-to-end anastomosis of a vascular bypass-graft and an artery. Special attention is paid to the impact of geometric imperfections in the artery and the flow path of the upstream vessel segment on the hemodynamics. A partitioned solution approach is applied and developed further to solve the coupled problem in an implicit manner. To stabilize and accelerate the convergence of the staggered coupling iterations, an interface quasi-Newton least squares method is applied. While the finite volume method is used for the fluid mechanics subproblem, high-order finite elements serve to discretize the structural subproblem. A convergence study shows the efficiency of the high-order elements in the context of nearly incompressible, anisotropic materials used to model circular and irregular-shaped segments of an artery. The fluid–structure interaction simulations reveal a dominant influence of the upstream vessel’s curvature, which, however, decays rapidly in straight sections where the influence of geometric imperfections is dominant. Based on the proposed simulation approach, hemodynamic parameters such as the oscillating shear index can be directly linked to the shape and the intensity of the imperfections.
URI: http://hdl.handle.net/11420/3518
ISSN: 1873-7668
Journal: Computers and mathematics with applications 
Institute: Konstruktion und Festigkeit von Schiffen M-10 
Document Type: Article
Appears in Collections:Publications without fulltext

Show full item record

Page view(s)

95
Last Week
1
Last month
3
checked on Sep 28, 2022

SCOPUSTM   
Citations

4
Last Week
0
Last month
0
checked on Jun 30, 2022

Google ScholarTM

Check

Add Files to Item

Note about this record

Cite this record

Export

Items in TORE are protected by copyright, with all rights reserved, unless otherwise indicated.