Fluid-structure interaction in a pulmonary arterial bifurcation

X. L. Yang, Yang Liu, J. M. Yang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

25 Citations (Scopus)


A numerical method is developed to solve the fluid-structure interaction in three-dimensional pulmonary arterial bifurcation with collapsible tubes. A self-developed FEM code is used to calculate the nonlinear deformation of the thin-walled structure and a commercial CFD solver, FLUENT, is used to resolve the fluid flow. The large deformation of the structure alters the flow field significantly while the fluid pressure affects the deformation of the structure strongly. In the bifurcation branches, the relatively short tube collapses into wave number N = 3 mode. The strong collapse of the branch tube leads to a large contraction of the cross-sectional area and increases the resistance on the fluid flow. The recirculation occurs at both the up- and down-stream of the collapsed tube.
Original languageEnglish
Pages (from-to)2694-2699
Number of pages6
JournalJournal of Biomechanics
Issue number12
Publication statusPublished - 15 Aug 2007


  • Collapsible tubes
  • Fluid-structure interaction
  • Pulmonary arterial bifurcation

ASJC Scopus subject areas

  • Biophysics
  • Orthopedics and Sports Medicine
  • Biomedical Engineering
  • Rehabilitation


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