Overset meshing in combination with novel blended weak-strong fluid-structure interactions for simulations of a translating valve in series with a second valve

J. Bornoff, H. S. Gill, A. Najar, I. L. Perkins, A. N. Cookson, K. H. Fraser

Research output: Contribution to journalArticlepeer-review

1 Citation (SciVal)

Abstract

Mechanical circulatory support (MCS) devices can bridge the gap to transplant whilst awaiting a viable donor heart. The Realheart Total Artificial Heart is a novel positive-displacement MCS that generates pulsatile flow via bileaflet mechanical valves. This study developed a combined computational fluid dynamics and fluid-structure interaction (FSI) methodology for simulating positive displacement bileaflet valves. Overset meshing discretised the fluid domain, and a blended weak-strong coupling FSI algorithm was combined with variable time-stepping. Four operating conditions of relevant stroke lengths and rates were assessed. The results demonstrated this modelling strategy is stable and efficient for modelling positive-displacement artificial hearts.

Original languageEnglish
Number of pages15
JournalComputer Methods in Biomechanics and Biomedical Engineering
Early online date18 Apr 2023
DOIs
Publication statusE-pub ahead of print - 18 Apr 2023

Keywords

  • Computational fluid dynamics
  • fluid-structure interactions
  • mechanical heart valve
  • positive displacement
  • total artificial heart

ASJC Scopus subject areas

  • Bioengineering
  • Biomedical Engineering
  • Human-Computer Interaction
  • Computer Science Applications

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