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Related Experiment Videos

Computational flow visualization in vibrating flow pump type artificial heart by unstructured grid.

Takuma Kato1, Satoyuki Kawano, Kazuhiro Nakahashi

  • 1Department of Aeronautics and Space Engineering, Tohoku University, Sendai, Japan. tkato@ltwt.ifs.tohoku.ac.jp

Artificial Organs
|January 22, 2003
PubMed
Summary

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Computational fluid dynamics (CFD) simulations visualized blood flow in a vibrating flow pump (VFP) artificial heart. This research provides key design insights for left ventricular assist devices, aiming to reduce risks like hemolysis and blood coagulation.

Area of Science:

  • Biomedical Engineering
  • Fluid Dynamics
  • Computational Science

Background:

  • Artificial hearts, specifically vibrating flow pumps (VFPs), are crucial for left ventricular assist devices.
  • Blood flow patterns within artificial hearts significantly impact device performance and can lead to complications like hemolysis and blood coagulation.

Purpose of the Study:

  • To perform computational flow visualization within the casing of a VFP under various conditions.
  • To develop and apply novel computational fluid dynamics (CFD) techniques for designing effective VFPs.
  • To present useful design data for VFPs intended for left ventricular assist device applications.

Main Methods:

  • Developed numerical codes to solve three-dimensional Navier-Stokes equations for blood flow using the finite volume method.

Related Experiment Videos

  • Implemented simulation techniques incorporating the artificial compressibility method and unstructured grids.
  • Performed numerical calculations based on precise configurations and flow conditions of a prototype VFP device.

    • Main Results:

    • Detailed CFD analysis of flow patterns within the VFP casing was conducted.
    • The study visualized computational results using advanced computational graphics techniques.
    • Identified flow characteristics closely related to the risks of hemolysis and blood coagulation.

    Conclusions:

    • The developed CFD methods provide a robust approach for analyzing VFP performance.
    • The study offers valuable design data for optimizing VFPs to mitigate biomechanical issues.
    • Effective VFP design is critical for improving the safety and efficacy of left ventricular assist devices.