A Reduced Order Model formulation for left atrium flow: an Atrial Fibrillation case
| Autor: | Balzotti, Caterina, Siena, Pierfrancesco, Girfoglio, Michele, Stabile, Giovanni, Dueñas-Pamplona, Jorge, Sierra-Pallares, José, Amat-Santos, Ignacio, Rozza, Gianluigi |
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| Rok vydání: | 2023 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | A data-driven Reduced Order Model (ROM) based on a Proper Orthogonal Decomposition - Radial Basis Function (POD-RBF) approach is adopted in this paper for the analysis of blood flow dynamics in a patient-specific case of Atrial Fibrillation (AF). The Full Order Model (FOM) is represented by incompressible Navier-Stokes equations, discretized with a Finite Volume (FV) approach. Both the Newtonian and the Casson's constitutive laws are employed. The aim is to build a computational tool able to efficiently and accurately reconstruct the patterns of relevant hemodynamics indices related to the stasis of the blood in a physical parametrization framework including the cardiac output in the Newtonian case and also the plasma viscosity and the hematocrit in the non-Newtonian one. Many FOM-ROM comparisons are shown to analyze the performance of our approach as regards errors and computational speed-up. Comment: 21 pages, 14 figures |
| Databáze: | arXiv |
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