RESEARCH ARTICLE


Numerical Study of Non-Newtonian Blood Behavior in the Abdominal Aortic Bifurcation of a Patient-Specific at Rest



Carlos Oliveira1, Armando A. Soares1, 2, *, André Simões3, Sílvia Gonzaga2, Abel Rouboa1, 2, 4
1 ECT/UTAD – School of Science and Technology, University of Trás-os-Montes e Alto Douro, Vila Real,Portugal.
2 INEGI-Institute of Science and Innovation in Mechanical and Industrial Engineering, Porto, Portugal.
3 Hospital Centre Lisboa Norte, Hospital de Santa Maria e Hospital Pulido Valente, Lisbon, Portugal.
4 MEAM-Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania, Philadelphia, PA, USA.


Article Metrics

CrossRef Citations:
0
Total Statistics:

Full-Text HTML Views: 991
Abstract HTML Views: 467
PDF Downloads: 545
ePub Downloads: 437
Total Views/Downloads: 2440
Unique Statistics:

Full-Text HTML Views: 527
Abstract HTML Views: 287
PDF Downloads: 220
ePub Downloads: 157
Total Views/Downloads: 1191



© 2017 Oliveira et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: (https://creativecommons.org/licenses/by/4.0/legalcode). This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the ECT/UTAD, School of Science and Technology, University of Trás-os-Montes e Alto Douro, Vila Real, Portugal; INEGI-Institute of Science and Innovation in Mechanical and Industrial Engineering, Porto, Portugal; ECT/UTAD, Quinta de Prados, Apartado 1013, 5001-801 Vila Real, Portugal, Tel: +351 259 350 334; Fax: +351 259 350 356; E-mail: asoares@utad.pt


Abstract

Background:

The interaction of blood flow with walls of blood vessels is central for the development and maintenance of cardiovascular health. The analysis of wall shear stress is, therefore, fundamental in hemodynamic studies.

Objective:

The aim of this work is to study numerically the influence of the shear thinning blood properties on the hemodynamics in the abdominal aortic bifurcation for a patient-specific at rest.

Methods:

Were tested two models for the blood dynamic viscosity, one Newtonian and other non-Newtonian, with dependence on hematocrit and total protein minus albumin.

Results and Conclusion:

The results show the shear thinning behavior influence on the velocity distribution and wall shear stress. Furthermore, wall shear stress values are globally lower for non-Newtonian blood model at high velocity values than those for the Newtonian blood model. However, for low velocity values this behavior is inverted.

Keywords: Abdominal Aorta, Computational Fluid Dynamics, Hemodynamic, Rest, Shear Thinning, Wall Shear Stress.