3 documents found, page 1 of 1
Experimental and numerical analyses of the hemodynamics impact on real intracra...
Souza, A.; Lopes, D.; Souza, S.; Ribeiro, J.; Lima, R. A.; Ferrera, C.This study investigates the impact of hemodynamics on real intracranial aneurysms (IAs) using experiments and computational fluid dynamics (CFD) simulations. A particle tracking velocimetry (PTV) approach was used to study the vortical structures inside a real aneurysm and validate numerical simulations performed at a steady regime for different flow rates. Moreover, this and two additional patient-specific cas...
Comparison of RANS and LES turbulent flow models in a real stenosis
Lopes, D.; Puga, Hélder; Teixeira, J.; Lima, R.; Grilo, J.; Dueñas-Pamplona, J.; Ferrera, C.This study focuses on the performance of various turbulence models in predicting hemodynamic variables within a patient-specific geometry of the Brachiocephalic trunk exhibiting a severe stenosis. Numerical simulations employing Reynolds-averaged Navier-Stokes (RANS) and Large Eddy Simulation (LES) models were conducted, comparing four RANS with two LES models. Results indicated significant differences in turbu...
Analysis of finite element and finite volume methods for fluid-structure intera...
Lopes, D.; Agujetas, R.; Puga, Hélder; Teixeira, J. Carlos; Lima, Rui Alberto Madeira Macedo; Alejo, J. P.; Ferrera, C.This paper presents a qualitative and quantitative comparison between the finite element and the finite volume methods for the fluid-structure interaction simulation of blood flow through a real stenosed artery. The artery geometry corresponds to a severely stenosed (around 75% lumen reduction) portion of the brachiocephalic trunk, located immediately upstream of the bifurcation of this vessel into the right su...