Blood–artery interaction in calcified aortas and abdominal aortic aneurysms

Soonpil Kang, Sharbel Nashar, Arif Masud

Research output: Contribution to journalArticlepeer-review

Abstract

A stabilized Fluid–Structure Interaction (FSI) method is presented for coupling shear-rate dependent model of blood with finitely deforming anisotropic hyperelastic model of arteries. The blood–artery coupling conditions are weakly enforced to accommodate non-matching blood–artery meshes which provides great flexibility in independent discretization of the fluid and solid subdomains in the patient-specific geometric models. The variationally derived interface coupling terms play an important role in the concurrent solution of the nonlinear mixed-field problems on non-matching discretizations. Two test cases are presented that investigate the effect of the growth of aortic aneurysm on the local changes in the blood flow patterns, and stress concentrations in calcified arteries under pulsating flows to highlight the clinical relevance of the proposed method for cardiovascular applications.

Original languageEnglish (US)
Article number101684
JournalExtreme Mechanics Letters
Volume54
DOIs
StatePublished - Jul 2022
Externally publishedYes

Keywords

  • Aortic aneurysm
  • Blood flow through diseased arteries
  • Blood–artery interaction
  • Calcified arteries
  • Non-Newtonian shear-rate dependent fluids

ASJC Scopus subject areas

  • Bioengineering
  • Chemical Engineering (miscellaneous)
  • Engineering (miscellaneous)
  • Mechanics of Materials
  • Mechanical Engineering

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