Simulation of Blood flow in Different Configurations Design of Bi-leaflet Mechanical Heart Valve

International Conference on Aerospace and Mechanical Engineering 2017

航空航天工程;机械制造

Hafizah Mokhtar, N.^1 ; Abas, Aizat^1

School of Mechanical Engineering, Universiti Sains Malaysia, Engineering Campus, Penang, Nibong Tebal

14300, Malaysia^1

关键词: Artificial heart valves;    Blood flow;    Computer aided designs (CAD);    Design configurations;    Doppler velocity;    Flow area;    Human heart;    Mechanical heart valves;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/370/1/012065/pdf
DOI  :  10.1088/1757-899X/370/1/012065

学科分类：航空航天科学

来源: IOP

【 摘 要 】

In this work, two different designs of artificial heart valve were devised and then compared by considering the thrombosis, wear and valve orifice to anatomical orifice ratio of each mechanical heart valve. These different design configurations of bi-leaflet mechanical heart valves model are created through the use of Computer-aided design (CAD) modelling and simulated using Computational fluid dynamic (CFD) software. Design 1 is based on existing conventional bi-leaflet valve and design 2 based on modified bi-leaflet respectively. The flow pattern, velocity, vorticity and stress analysis have been done to justify the best design. Based on results, both of the designs show a Doppler velocity index of less than the allowable standard of 2.2 which is safe to be used as replacement of the human heart valve. However, design 2 shows that it has a lower possibility of cavitation issue which will lead to lower thrombosis and provide good central flow area of blood as compared to design 1.