3D simulation of magneto-mechanical coupling in MRI scanners using high order FEM and POD 

    Seoane Chouciño, Marcos (Date of defense: 2020-07-15)

    Magnetic Resonance Imaging (MRI) scanners have become an essential tool in the medical industry due to their ability to produce high resolution images of the human body. To generate an image of the body, MRI scanners combine ...

    Advanced physics-based and data-driven strategies 

    Ibáñez Pinillo, Rubén (Date of defense: 2019-09-02)

    Simulation Based Engineering Science (SBES) has brought major improvements in optimization, control and inverse analysis, all leading to a deeper understanding in many processes occuring in the real world. These noticeable ...

    Analysis of underground excavations in argillaceous hard soils : weak rocks 

    Mánica Malcom, Miguel Ángel (Date of defense: 2018-10-11)

    Materiales arcillosos rígidos, que se encuentran en la zona de transición entre suelos duros y rocas blandas, están siendo considerados actualmente en varios países como la roca huésped para el almacenamiento geológico ...

    Approach to acoustic mapping through continuous mobile monitoring 

    Quintero Perez, Guillermo (Date of defense: 2019-07-08)

    For the production of representative noise maps, a large amount of information is necessary, which includes, among others, on-site measurements of environmental noise. Thus, for noise maps based on measurements, mobile ...

    Complexity reduction in parametric flow problems via Nonintrusive Proper Generalised Decomposition in OpenFOAM 

    Tsiolakis, Vasileios (Date of defense: 2020-01-31)

    The present thesis explores the viability of the proper generalised decomposition (PGD) as a tool for parametric studies in a daily industrial environment. Starting from the equations modelling incompressible flows, the ...

    Computational multiscale modeling of fracture and its model order reduction 

    Caicedo Silva, Manuel Alejandro (Date of defense: 2017-02-24)

    This thesis focuses on the numerical modeling of fracture and its propagation in heterogeneous materials by means of hierarchical multiscale models based on the FE2 method, addressing at the same time, the problem of the ...

    Discrete volume method : a variational approach for brittle fracture 

    Cardoso Nungaray, Víctor Eduardo (Date of defense: 2018-04-27)

    This thesis presents a proposal to simulate mechanics and dynamics of brittle fracture. A variational formulation is used to describe Lagrangian mechanics, by minimizing the difference between potential and kinetic energy ...

    Efficient computational mesoscale modeling of concrete under cyclic loading 

    Titscher, Thomas (Date of defense: 2019-09-27)

    Concrete is a complex material and can be modeled on various spatial and temporal scales. While simulations on coarse scales are practical for engineering applications, a deeper understanding of the material is gained on ...

    Efficient simulation tools for real-time monitoring and control using model order reduction and data-driven techniques 

    Quaranta, Giacomo (Date of defense: 2019-09-02)

    Numerical simulation, the use of computers to run a program which implements a mathematical model for a physical system, is an important part of today technological world. It is required in many scientific and engineering ...

    Experimental and numerical study of the effect of stress on ASR expansions in concrete 

    Liaudat, Joaquín (Date of defense: 2018-06-15)

    This thesis aims at deepening in the understanding of the mechanisms by which the stress state affects the development of concrete expansions and cracking due to the Alkali-Silica Reaction (ASR). With this purpose, a ...

    Lagrangian modeling of reactive transport in heterogeneous porous media 

    Solé Marí, Guillem (Date of defense: 2020-03-13)

    Fluid flow, solute transport, and chemical reactions in porous media are highly relevant for multiple applications and in several fields of knowledge. Aquifers are a typical example of porous media, but many others exist, ...

    Low and high-order hybridised methods for compressible flows 

    Vila Pérez, Jordi (Date of defense: 2021-02-10)

    The aerospace community is challenged as of today for being able to manage accurate overnight computational fluid dynamics (CFD) simulations of compressible flow problems. Well-established CFD solvers based on second-order ...

    Mathematical and computational modeling of flexoelectricity at mesoscopic and atomistic scales 

    Codony, David (Date of defense: 2021-03-01)

    This PhD thesis focuses on the development of mathematical and computational models for flexoelectricity, a relatively new electromechanical coupling that is present in any dielectric at the micron and sub-micron scales. ...

    Mixed finite element formulations for strain localization and failure in plasticity 

    Benedetti, Lorenzo (Date of defense: 2017-05-11)

    Strain localization and quasi-brittle failure in frictional-cohesive materials is still an open and challenging problem in computational mechanics. Owing to its complexity and the significant implications on numerous ...

    Model order reduction of coupled thermo-hydro-mechanical processes in geo-environmental applications 

    Larion, Ygee (Date of defense: 2022-02-01)

    In a large number of geo-environmental applications, it is essential to model coupled processes that depend on several design parameters such as material properties and geometrical features. Thermo-hydro-mechanical (THM) ...

    Multi-scale topological design of structural materials : an integrated approach 

    Ferrer Ferré, Àlex (Date of defense: 2017-05-26)

    The present dissertation aims at addressing multiscale topology optimization problems. For this purpose, the concept of topology derivative in conjunction with the computational homogenization method is considered. In ...

    Numerical modelling of viscoelastic flows based on a log-conformation formulation 

    Moreno Martínez, Laura (Date of defense: 2021-09-22)

    Viscoelastic fluids are a type of non-Newtonian fluids which are formed by complex internal structures and high-molecular-weight, whose typical examples are the polymer solutions and molten polymers. Also, the viscoleastic ...

    Numerical simulation of aeroacoustics using the variational multiscale method : application to the problem of human phonation 

    Pont Ribas, Arnau (Date of defense: 2018-02-23)

    The solution of the human phonation problem applying computational mechanics is covered by several research branches, such as Computational Fluid Dynamics (CFD), biomechanics or acoustics, among others. In the present ...

    Numerical techniques for non-linear analysis of structures combining discrete element and finite element methods 

    Santasusana Isach, Miquel (Date of defense: 2016-12-01)

    This works encompasses a broad review of the basic aspects of the Discrete Element Method for its application to general granular material handling problems with special emphasis on the topics of particle-structure interaction ...

    Simulation tools for biomechanical applications with PGD-based reduced order models 

    Zou, Xi (Date of defense: 2018-03-12)

    Numerical simulation tools are generally used in all modern engineering fields, especially those having difficulties in performing large number of practical experiments, such as biomechanics. Among the computational methods, ...