Federica Milinanni
Solution of Second Order Elliptic Equations on Polygonal/Polyhedral Meshes by the Virtual Element Method with Applications in Geosciences.
Rel. Stefano Berrone, Marco Verani. Politecnico di Torino, Corso di laurea magistrale in Ingegneria Matematica, 2020
|
Preview |
PDF (Tesi_di_laurea)
- Tesi
Licenza: Creative Commons Attribution Non-commercial No Derivatives. Download (13MB) | Preview |
Abstract
The reaction-convection-diffusion equation is a second order elliptic partial differential equation that can be used to model many different physical phenomena. A method to solve this class of problems is the Virtual Element Method (VEM). In this thesis we focus on two dimensional problems defined on polygonal meshes, considering both the stationary and evolutive case. The aim of this thesis is to analyze and implement the stabilization methods Streamline Upwind Petrov-Galerkin (SUPG) and Mass Lumping in the particular case of Virtual Element space of order k = 1. Numerical results show the positive stabilization effect of SUPG and Mass Lumping when the problem is characterized respectively by very large Péclet and very low Karlowitz numbers.
Moreover, an error analysis on an easy stationary problem shows that the stabilization methods preserve the rate of convergence of VEM
Relatori
Anno Accademico
Tipo di pubblicazione
Numero di pagine
Corso di laurea
Classe di laurea
Ente in cotutela
URI
![]() |
Modifica (riservato agli operatori) |
