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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
NUMERICAL INVESTIGATION OF THE EFFECTS OF DIFFERENT CONSTITUTIVE RHEOLOGY MODELS ON BLOOD FLOW TOPOLOGY
Submission Author:
Gustavo Pires Villela de Almeida , RS
Co-Authors:
Gustavo Pires Villela de Almeida, João Luiz F. Azevedo
Presenter: Gustavo Pires Villela de Almeida
doi://10.26678/ABCM.ENCIT2020.CIT20-0057
Abstract
The application of CFD to understand mechanical flow properties in complex flows plays a vital role in hemo- dynamics. The viscosity of the blood is mainly dependent of the volume fraction of red blood cells and plasma in its composition, and how much these blood cells are deformed as a function of the flow field. Hence, blood structure may lead to a non-Newtonian behavior under certain flow conditions. The present work evaluate the effects of Generalized Newtonian Fluid (GNF) constitutive rheology models on the flow field for blood flowing through a constricted channel using OpenFOAM libraries. Results have proven the sensitivity of flow field to the yield stress with variations in velocity magnitudes up to 6.3% and in Wall Shear Stress (WSS) up to 16.17%.
Keywords
Rheology, Blood viscosity, CFD, Non-Newtonian fluid, OpenFOAM
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