Simulation Of Three Dimensional Pulsatile Blood Flow In Aorta-Coronary Bypass

Ramezani Saadatabadi, Ahmad; Ahmadlouy Darab, Majid; Ghalichi, Farzan; Kamyabi, Ataollah

doi:10.22041/ijbme.2010.13378

Simulation Of Three Dimensional Pulsatile Blood Flow In Aorta-Coronary Bypass

Document Type : Technical note

Authors

Ahmad Ramezani Saadatabadi ¹

Majid Ahmadlouy Darab ²

Farzan Ghalichi ³

Ataollah Kamyabi ⁴

¹ Associate Professor, School of Chemical and Petroleum Engineering, Sharif University of Technology

² Ph.D Candidate, Department of Biomechanics, School of Mechanical Engineering, Sahand University of Technology

³ Associate Professor, Department of Biomechanics, School of Mechanical Engineering, Sahand University of Technology

⁴ Ph.D Candidate, School of Chemical and Petroleum Engineering, Sharif University of Technology

https://doi.org/10.22041/ijbme.2010.13378

Abstract

This study aimed to simulate three dimensional pulsatile Newtonian blood flow in End-to-Side anastomosis of Aorta-coronary bypass using ascending aorta velocity flow wave as graft inlet and left anterior descending coronary artery (LAD) velocity flow wave as coronary inlet for 50% symmetric stenosis. We have supposed that LAD walls were rigid and had no spatial mobility due to heart beats. In order to investigate the graft angles effects on blood flow, especially on the wall shear stress magnitudes, 20, 30 and 40 degrees graft angles were used. Using ascending aorta and LAD pulses simultaneously as boundary conditions for the first time is one of the important features of this study because already these boundary conditions have not been used simultaneously. We considered prograde flow effects. Appearance of recirculation flows in various degrees of grafting angles, existence of secondary flows and increased in their effects specially in pulses deceleration phase, existence of double core helical flows and increase in their intensify specially at the systole peak and the rise in the spatial wall shear stress gradient by increasing in the graft angle are some of important results of this study. Finally, according to our assumptions we suggest 20 to 30 degrees as desired angles for grafting.

Keywords

Coronary artery

3-D Pulsatile Flow

Blood flow

Aorta-Coronary Bypass

Anastomosis

Subjects

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