Validation of a CFD methodology for positive displacement LVAD analysis using PIV data

Richard B. Medvitz, Varun Reddy, Steve Deutsch, Keefe B. Manning, Eric G. Paterson

Research output: Contribution to journalArticle

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Abstract

Computational fluid dynamics (CFD) is used to asses the hydrodynamic performance of a positive displacement left ventricular assist device. The computational model uses implicit large eddy simulation direct resolution of the chamber compression and modeled valve closure to reproduce the in vitro results. The computations are validated through comparisons with experimental particle image velocimetry (PIV) data. Qualitative comparisons of flow patterns, velocity fields, and wall-shear rates demonstrate a high level of agreement between the computations and experiments. Quantitatively, the PIV and CFD show similar probed velocity histories, closely matching jet velocities and comparable wall-strain rates. Overall, it has been shown that CFD can provide detailed flow field and wall-strain rate data, which is important in evaluating blood pump performance.

Original languageEnglish (US)
Article number111009-1
JournalJournal of Biomechanical Engineering
Volume131
Issue number11
DOIs
Publication statusPublished - Nov 1 2009

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All Science Journal Classification (ASJC) codes

  • Biomedical Engineering
  • Physiology (medical)

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