Now showing items 41-60 of 172

    Software development for the optimization of the influence of wind flows within energy applications and sustainable town planning 

    Germano, Nicola (Date of defense: 2021-12-14)

    This thesis aims to propose and validate an innovative, fully open-source framework capable of performing multiscale analysis for the assessment of local wind flows within the urban fabric. Each part of the framework is ...

    Quantifying uncertainty in complex automotive crashworthiness computational models : development of methodologies and implementation in VPS/Pamcrash 

    Rocas Alonso, Marc (Date of defense: 2021-07-23)

    The automotive industry is constantly involved in the development of new methodologies and projects with the aim of reducing costs. During the vehicle design process, one of the most significant cost arises from building ...

    Finite element methods for advection-diffusion-absorption and fluid flow problems 

    Puigferrat Pérez, Albert (Date of defense: 2021-07-20)

    The objective of the thesis is to develop a numerical tool to describe how the concentration of one or more substances distributed in a fluid environment changes under the effect of three transport processes: advection, ...

    Essays on second-best pricing schemes for transport infrastructure 

    Pons i Rigat, Aleix (Date of defense: 2021-07-26)

    Pricing has been advocated for a long time as a suitable policy instrument to deal with transport externalities. Recent technological developments enable the implementation of more sophisticated pricing schemes at affordable ...

    Evaluación del impacto del Cambio Climático (escenarios B1 y A2) en las aportaciones futuras generadas para el horizonte de proyección 2000-2050 en las cuencas del Fluvià y la Tordera en Catalunya 

    Olivares Cerpa, Gonzalo (Date of defense: 2021-07-29)

    The results presented in this doctoral thesis aims to evaluate the possible Climate Change effects on the water resources yield by the Fluvià river basin and the Tordera river basin, both located in the autonomous region ...

    Computational modeling and rational design of flexoelectric metamaterials and devices 

    Mocci, Alice (Date of defense: 2021-07-22)

    Piezoelectricity, the two-way coupling between electric polarization and strain is the basic mechanism behind most electromechanical transduction technologies. It is possible only in a limited number of materials, namely ...

    On the mechanics of strain localization in plasticity : isotropic and orthotropic, cohesive and frictional, associated and non-associated models 

    Kim, Sungchul (Date of defense: 2021-07-21)

    In this thesis, two main topics have been covered: the mechanics of strain localization in plasticity and the performance of several mixed finite elements subjected to plastic strain localization. Throughout the thesis, ...

    Redistribución del uso del espacio viario como gestor eficiente de movilidad 

    González Guzmán, Carlos Alberto (Date of defense: 2021-03-18)

    The efficient and equitable use of urban road space considered as a public good and a scarce resource, leads to giving priority to sustainable transport modes (walking, cycling and public transport). Private vehicle sees ...

    Towards the virtual wind tunnel for civil engineering applications 

    Zorrilla Martínez, Rubén (Date of defense: 2020-09-21)

    This thesis develops a numerical tool (the Virtual Wind Tunnel, VWT) for the resolution of problems involving fluid flow around structures. Due to the limitations that traditional methods may have in this context, the VWT ...

    Mixed finite elements with independent strain interpolation for isotropic and orthotropic damage 

    Barbat Vlad, Gabriel (Date of defense: 2021-02-11)

    The numerical modelling of fracture has been an active topic of research for over five decades. Most of the approaches employed rely on the use of the Finite Element Method, which has shown to be an effective and cost-efficient ...

    Advanced numerical techniques for inverse problems in geophysics 

    Ortega Gelabert, Olga (Date of defense: 2020-12-18)

    This thesis presents an efficient methodology to couple Model Order Reduction techniques within the framework of geophysical probabilistic inversion problems. Accurate models of the interaction between Earth inner processes ...

    Nuevo modelo de peaje urbano vinculado a una segregación del tráfico por niveles de calidad 

    Hormigo Ventura, Juan Pedro (Date of defense: 2020-11-25)

    Urban tolls are nowadays one of the most promising instruments to regulate the entry of vehicles into cities, given the flexibility and versatility granted by the available technology. Although, initially, they represent ...

    Debris flows and general steep slope shallow water flows numerical simulation 

    Medina Iglesias, Vicente (Date of defense: 2011-01-24)

    The main target of this research is to develop a numerical model for debris flow simulations. As it is known, in general, this kind of flows occur in steeped mountain slopes. When dealing with the complete 3D physic system ...

    Large-scale tree-based unfitted finite elements for metal additive manufacturing 

    Miranda Neiva, Eric (Date of defense: 2020-10-07)

    This thesis addresses large-scale numerical simulations of partial differential equations posed on evolving geometries. Our target application is the simulation of metal additive manufacturing (or 3D printing) with powder-bed ...

    Coastal risk forecast system : fostering proactive management at the Catalan coast 

    García León, Manuel (Date of defense: 2018-07-10)

    The action of sea storms is one of the most complex littoral processes with deep management implications. Along the Catalan shoreline which is about 700 km long, 190 km are subject to erosion and/or flooding. Around one ...

    Finite calculus. A stabilized finite element method for solving the Navier-Stokes equations. Application to ocean turbulence 

    Lamorena German, Arnel (Date of defense: 2020-09-17)

    Ocean turbulence is a classic example of turbulent motion and observations of turbulence in the ocean lack in regions of complex topography since in-situ and experimental data are complicated to obtain. As a result, ocean ...

    Innovative mathematical and numerical models for studying the deformation of shells during industrial forming processes with the Finite Element Method 

    Mataix Ferrándiz, Vicente (Date of defense: 2020-09-03)

    The doctoral thesis "Innovative mathematical and numerical models for studying the deformation of shells during industrial forming processes with the Finite Element Method" aims to contribute to the development of finite ...

    High-order hybridizable discontinuous Galerkin formulation and implicit Runge-Kutta schemes for multiphase flow through porous media 

    Costa Solé, Albert (Date of defense: 2020-07-17)

    This dissertation presents high-order hybridisable discontinuous Galerkin (HDG) formulations coupled with implicit Runge-Kutta (RK) methods for the simulation of one-phase flow and two-phase flow problems. High-order-methods ...

    Stabilized reduced order models for low speed flows 

    Reyes Sotomayor, Ricardo (Date of defense: 2020-03-23)

    This thesis presents the a stabilized projection-based Reduced Order Model (ROM) formulation in low speed fluid flows using a Variational Multi-Scale (VMS) approach. To develop this formulation we use a Finite Element (FE) ...

    Technical-economic analysis, modeling and optimization of floating offshore wind farms 

    Lerch, Markus (Date of defense: 2020-03-09)

    The offshore wind sector has grown significantly during the last decades driven by the increasing demand for clean energy and to reach defined energy targets based on renewable energies. As the wind speeds tend to be faster ...