A comparison of the hydrodynamical behaviour of three heart aortic prostheses by numerical methods.
The behaviour of the blood flow passing through artificial heart values in aortic position is numerically simulated by discretizing the Navier-Stokes equations for viscous incompressible flow through the finite element method. Three different artificial valves, Starr-Edwards, St Jude and disc valves, are modelled by using the finite element method as well as the Navier-Stokes equations for viscous incompressible flow. The blood flow behaviour is characterized by discretizing both planar and axisymmetric domains of the value devices. The streamlines as well as the velocity distributions are studied and compared. Likewise, the pressure patterns are analysed and compared. Some numerical examples of the three valves are presented and discussed herein.
Cerrolaza
M
M
Bioengineering Center, Faculty of Engineering, Central University of Venezuela, Caracas, Venezuela.
Herrera
M
M
Berrios
R
R
Annichiaricco
W
W
D000465:Algorithms; D001021:Aortic Valve; D001783:Blood Flow Velocity; D001794:Blood Pressure; D001809:Blood Viscosity; D003198:Computer Simulation; D006350:Heart Valve Prosthesis; D018056:Hemorheology / Q000145:classification; D006801:Humans; D008955:Models, Cardiovascular; D011474:Prosthesis Design; D012039:Regional Blood Flow; D013499:Surface Properties