A fluid mechanical view on abdominal aortic aneurysms - École polytechnique Access content directly
Journal Articles Journal of Fluid Mechanics Year : 2010

A fluid mechanical view on abdominal aortic aneurysms

Abstract

Abdominal aortic aneurysms are a dilatation of the aorta, localized preferentially above the bifurcation of the iliac arteries, which increases in time. Understanding their localization and growth rate remain two open questions that can have either a biological or a physical origin. In order to identify the respective role of biological and physical processes, we address in this article these questions of the localization and growth using a simplified physical experiment in which water (blood) is pumped periodically (amplitude a, pulsation ) in an elastic membrane (aorta) (length L, cross-section A0 and elastic wave speed c0) and study the deformation of this membrane while decharging in a rigid tube (iliac artery; hydraulic loss K). We first show that this pulsed flow either leads to a homogenous deformation or inhomogenous deformation depending on the value of the non-dimensional parameter c0 2/(aL2K). These different regimes can be related to the aneurysm locations. In the second part, we study the growth of aneurysms and show that they only develop above a critical flow rate which scales as A0c0/K. © 2010 Cambridge University Press.
Fichier principal
Vignette du fichier
S0022112010003782a.pdf (2.21 Mo) Télécharger le fichier
Origin : Publisher files allowed on an open archive
Loading...

Dates and versions

hal-00998006 , version 1 (08-07-2014)

Identifiers

Cite

V. Duclaux, F. Gallaire, Christophe Clanet. A fluid mechanical view on abdominal aortic aneurysms. Journal of Fluid Mechanics, 2010, 664, pp.5-32. ⟨10.1017/s0022112010003782⟩. ⟨hal-00998006⟩
359 View
293 Download

Altmetric

Share

Gmail Facebook X LinkedIn More