Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
A STUDY ON THE INFLUENCE OF RHEOLOGY MODEL IN A CONSTRICTED CHANNEL FLOW
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.ENCIT2018.CIT18-0424
Abstract
The application of CFD to understand mechanical flow properties in complex flows plays an important role in hemodynamics. The hypothesis of using a Newtonian fluid in hemodynamics simulations is sometimes made in order to reduce modeling efforts. However, the blood is fundamentally a suspension of red blood cells in plasma, whose viscosity is mainly dependent of their volume fraction and how much these blood cells are deformed as a function of the flow properties. Hence, blood-like fluid structure may lead to a non-Newtonian behavior and neglecting these effects may jeopardize the analysis. The present work presents a study on the effects of the Herschel-Bulkley rheology model on the mechanical flow properties for a fluid flowing through two different constricted channel configurations using OpenFOAM. A sensitivity analysis revealed high impact of the rheology model μ0 parameter as well as of changes in the geometry of the channel.
Keywords
Rheology, Non-Newtonian fluid, CFD, OpenFOAM, Constricted Channel
