Fluid-solid interaction in arteries incorporating the autoregulation concept in boundary conditions

Afkari, Damon and Gabaldón Castillo, Felipe (2015). Fluid-solid interaction in arteries incorporating the autoregulation concept in boundary conditions. "Computer Methods in Biomechanics and Biomedical Engineering", v. 19 (n. 9); pp. 985-1001. ISSN 1476-8259. https://doi.org/10.1080/10255842.2015.1085026.

Description

Title: Fluid-solid interaction in arteries incorporating the autoregulation concept in boundary conditions
Author/s:
  • Afkari, Damon
  • Gabaldón Castillo, Felipe
Item Type: Article
Título de Revista/Publicación: Computer Methods in Biomechanics and Biomedical Engineering
Date: 24 September 2015
ISSN: 1476-8259
Volume: 19
Subjects:
Freetext Keywords: FSI; pressure boundary condition; autoregulation; impedance; aorta
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Mecánica de Medios Continuos y Teoría de Estructuras
Creative Commons Licenses: None

Full text

[img]
Preview
PDF - Requires a PDF viewer, such as GSview, Xpdf or Adobe Acrobat Reader
Download (2MB) | Preview

Abstract

In pre-surgery decisions in hospital emergency cases, fast and reliable results of the solid and fluid mechanics problems are of great interest to clinicians. In the current investigation, an iterative process based on a pressure-type boundary condition is proposed in order to reduce the computational costs of blood flow simulations in arteries, without losing control of the important clinical parameters. The incorporation of cardiovascular autoregulation, together with the well-known impedance boundary condition, forms the basis of the proposed methodology. With autoregulation, the instabilities associated with conventional pressure-type or impedance boundary conditions are avoided without an excessive increase in computational costs. The general behaviour of pulsatile blood flow in arteries, which is important from the clinical point of view, is well reproduced through this new methodology. In addition, the interaction between the blood and the arterial walls occurs via a modified weak coupling, which makes the simulation more stable and computationally efficient. Based on in vitro experiments, the hyperelastic behaviour of the wall is characterised and modelled. The applications and benefits of the proposed pressure-type boundary condition are shown in a model of an idealised aortic arch with and without an ascending aorta dissection, which is a common cardiovascular disorder.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainDPI2011-27609/DPIUnspecifiedUnspecifiedUnspecified

More information

Item ID: 40812
DC Identifier: http://oa.upm.es/40812/
OAI Identifier: oai:oa.upm.es:40812
DOI: 10.1080/10255842.2015.1085026
Official URL: http://www.tandfonline.com/doi/full/10.1080/10255842.2015.1085026#.ViZmTX7NyUk
Deposited by: Memoria Investigacion
Deposited on: 21 Jun 2016 14:52
Last Modified: 24 Sep 2016 22:30
  • Logo InvestigaM (UPM)
  • Logo GEOUP4
  • Logo Open Access
  • Open Access
  • Logo Sherpa/Romeo
    Check whether the anglo-saxon journal in which you have published an article allows you to also publish it under open access.
  • Logo Dulcinea
    Check whether the spanish journal in which you have published an article allows you to also publish it under open access.
  • Logo de Recolecta
  • Logo del Observatorio I+D+i UPM
  • Logo de OpenCourseWare UPM