Journal of Engineering Mathematics

, Volume 64, Issue 4, pp 353–365

Flow in a multi-branching vessel with compliant walls

Article

DOI: 10.1007/s10665-009-9285-z

Cite this article as:
Green, J.E.F., Smith, F.T. & Ovenden, N.C. J Eng Math (2009) 64: 353. doi:10.1007/s10665-009-9285-z

Abstract

The problem of fluid flow in a compliant-walled channel which branches into two or more daughters is considered with the aim of understanding blood flow through arterio-venous malformations (AVMs) in the brain. The outer walls of the channel are assumed for definiteness to behave as spring-back plates, whilst the divider is taken as rigid. The fluid is assumed to be incompressible and inviscid. When the Strouhal number is small (as occurs in practice in the brain), there are two main axial length scales, one much longer than the vessel width and the other comparable with the vessel width. Also, in the case of small wall displacements, one can analyse the local flow-structure interaction problem using a complex variable method. The flow shows markedly different qualitative features downstream of the branching, depending on the wall stiffness.

Keywords

Branching channelCompliant wallsInviscid fluid flowMatching

Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • J. E. F. Green
    • 1
    • 2
  • F. T. Smith
    • 1
  • N. C. Ovenden
    • 1
  1. 1.Department of MathematicsUniversity College LondonLondonUK
  2. 2.Mathematical Biosciences InstituteThe Ohio State UniversityColumbusUSA