Document Type : Full Research Paper

Authors

• Alireza Hashemifard ¹
• Nasser Fatouraee ²
• Malikeh Nabaei ³

¹ Biological Fluid Dynamics Research Laboratory, Biomedical Engineering Department, Amirkabir University of Technology, Tehran, Iran

² Associate Professor Amirkabir University of Technology Tehran, Iran

³ Amirkabir University of Technology

Abstract

The crucial responsibility of the aortic valve is to prevent returning of blood flow from the aorta back to the left ventricle. In-time and accurate opening and closing of the aortic valve can effectively produce the desired blood pressure and cardiac output. For this reason, aortic valve simulation can identify changes related to aortic valve hemodynamics and their relationship. Diagrams of the left ventricular pressure, the left ventricular pressure difference relative to the aortic artery, GOA, blood flow, the left ventricle pressure-to-volume, the left ventricular energy, kinematic energy density, viscous dissipation, valve resistance, fluid pressure difference in two The surface side of the leaflets, and the momentary pressure difference of the longitudinal axis of the aortic valve compared to the pressure of the aortic artery are reported in this research and based on these, the process of opening and closing of the aortic valve is analyzed using numerical methods named ALE. The moving of the aortic leaflet as the displacement of the solid boundary in the fluid-solid interaction method causes the fluid mesh to undergo displacement and change, which is repaired by the sequence of re-meshing in the fluid domain. In this process, problems occur, the details of which and the resolving method are explained in detail.

Keywords

• Sinus Valsalva
• FSI
• Re-meshing
• Left Ventricle Pressure
• GOA
• Kinetic Energy
• Viscous Dissipation
• Valve Resistance

Main Subjects

• Fluid-Structure Interaction in Biological Media / FSI