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

Afkari, Damon y 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.

Descripción

Título: Fluid-solid interaction in arteries incorporating the autoregulation concept in boundary conditions
Autor/es:
  • Afkari, Damon
  • Gabaldón Castillo, Felipe
Tipo de Documento: Artículo
Título de Revista/Publicación: Computer Methods in Biomechanics and Biomedical Engineering
Fecha: 24 Septiembre 2015
Volumen: 19
Materias:
Palabras Clave Informales: FSI; pressure boundary condition; autoregulation; impedance; aorta
Escuela: E.T.S.I. Caminos, Canales y Puertos (UPM)
Departamento: Mecánica de Medios Continuos y Teoría de Estructuras
Licencias Creative Commons: Ninguna

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Resumen

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.

Proyectos asociados

TipoCódigoAcrónimoResponsableTítulo
Gobierno de EspañaDPI2011-27609/DPISin especificarSin especificarSin especificar

Más información

ID de Registro: 40812
Identificador DC: http://oa.upm.es/40812/
Identificador OAI: oai:oa.upm.es:40812
Identificador DOI: 10.1080/10255842.2015.1085026
URL Oficial: http://www.tandfonline.com/doi/full/10.1080/10255842.2015.1085026#.ViZmTX7NyUk
Depositado por: Memoria Investigacion
Depositado el: 21 Jun 2016 14:52
Ultima Modificación: 24 Sep 2016 22:30
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