3D Fluid-Structure Interaction Simulation Of A
Bileaflet Heart Valve Opening-closing Cycle And
Comparison With Experimental Flow Data
Author(s)
D. Palmieri, G. Vezzani, F. Lagasco & S. Pascale
Abstract
A fully automated numerical procedure has been implemented to enable 3D
modelling of the physical behaviour of blood flow through an implanted
Mechanical Heart Valve (MHV). For this purpose, a specifically developed
Valve Cycle Program was coupled with a commercial Computational Fluid
Dynamics (CFD) solver to implement a Fluid-Structure Interaction (FSI) model.
A complete opening-closing cycle has been simulated by imposing physiological
boundary conditions. A parallel laboratory circulatory mock-loop hosting a
MHV has been manufactured to carry out experimental Particle Image
Velocimetry (PIV) flow measurements. The predicted flow characteristics were
found to be in good agreement with experimental observations. Both numerical
and experimental results confirmed that flow patterns and associated shear
stresses downstream of the valve result in a low thrombosis and haemolysis
potential.
Keywords: heart valve, CFD, Fluid-Structure Interaction, PIV.
1 Introduction
Since the first successful implantation of a prosthetic heart valve four decades
ago, over 50 different designs have been developed including both mechanical
and bioprosthetic valves. Today, with over 200,000 implants worldwide each
year, the most widely implanted design is the mechanical bileaflet prosthesis [1].
However, MHV implants suffer from complications resulting from thrombus
deposition and patients implanted with these valves need to withstand long-term
anti-coagulant therapy. Such complications are thought to be caused by high
Keywords
heart valve, CFD, Fluid-Structure Interaction, PIV.
Related Book
Other papers in this volume
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