Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
A comparison study between high-fidelity and mid-fidelity models of coronary blood flow simulation
Submission Author:
ALEXANDRE COSTA , PR , Brazil
Co-Authors:
Amaury Santos, ALEXANDRE COSTA, Alonso Alvarez, Pablo Blanco
Presenter: Amaury Santos
doi://10.26678/ABCM.COBEM2023.COB2023-0359
Abstract
Arterial circulation is an incredibly complex system, and understanding its flow dynamics is crucial for providing better treatments for cardiovascular diseases. Coronary flow simulation has become a significant research tool for studying fluid mechanics in coronary arteries. The development of numerical methods in Computational Fluid Dynamics (CFD) has allowed researchers to model and analyze complex flow patterns in the coronary network with unprecedented detail. CFD models can simulate the effects of various boundary conditions, the presence of atherosclerotic plaques, surgical interventions (e.g., stent placement), and physiological parameter effects (e.g., blood viscosity and shear stress). This study aims to compare the results of a high-fidelity model (Finite Volume Method, FVM) and a medium-fidelity numerical approach (Transversely Enriched Pipe Element Method, TEPEM). The medium-fidelity numerical strategy is positioned between low-fidelity and high-fidelity models to simulate fluid flow in tubular domains. While a high-fidelity model can provide detailed predictions, its application to clinical settings is prohibitively expensive. An in-house code was used to implement the medium-fidelity model (TEPEM), and a commercial solver (ANSYS FLUENT) was used to generate the high-fidelity model (FVM). As an initial study, both methods are employed to predict spatial heterogeneities in the pressure field in a specific patient's coronary artery. The results, in terms of pressure profiles, are compared across four different physiological scenarios.
Keywords
hemodynamics, reduced order models, Computational fluid dynamics (CFD)
