Now showing items 21-40 of 50

    Fluid structure interaction by means of reduced order models 

    Tello Guerra, Alexis (Date of defense: 2020-07-10)

    The standard Fluid Structure Interaction coupling (velocity--pressure/displacement) is compared against two novel types of coupling, a Two Field coupling (velocity--pressure/displacement--pressure) and a Three Field coupling ...

    GIS platform for management of shallow geothermal resources 

    García Alcaraz, María del Mar (Date of defense: 2016-03-04)

    This thesis promotes an efficient use of shallow geothermal energy by means of an integrated management system to organize its exploitation. Shallow geothermal energy is a renewable resource based on thermal energy exchange ...

    High-fidelity surrogate models for parametric shape design in microfluidics 

    Borchini, Luca (Date of defense: 2020-12-17)

    Nowadays, the main computational bottleneck in computer-assisted industrial design procedures is the necessity of testing multiple parameter settings for the same problem. Material properties, boundary conditions or ...

    Insertion problems in geomechanics with the particle finite element method 

    Monforte Vila, Lluís (Date of defense: 2018-11-05)

    This thesis develops a numerical technique in which the Particle Finite Element method is applied to simulate solid intrusion problems in Geotechnical Engineering. The thesis describes the numerical development work that ...

    Landslide motion assessment including thermal interaction : an MPM approach 

    Alvarado Bueno, Mauricio (Date of defense: 2018-04-23)

    Risk associated with landslides of natural or man-made origin depends on the prediction of the post-failure behaviour of the mobilized mass. Numerical models capable of integrating the landslide geometry and its evolution, ...

    A machine learning based methodology for anomaly detection in dam behaviour 

    Salazar González, Fernando (Date of defense: 2017-02-23)

    Dam behaviour is difficult to predict with high accuracy. Numerical models for structural calculation solve the equations of continuum mechanics, but are subject to considerable uncertainty as to the characterisation of ...

    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. ...

    Measuring impact loads on rigid coastal structures 

    Marzeddu, Andrea (Date of defense: 2016-04-19)

    The aim of this work is the study of laboratory effects on the measurement of wave impact induced loads on rigid maritime structures. A high number of experiments (more then 4000 using regular wave attacks) have been carried ...

    Mejora del diagnóstico y de la hemodinámica en la revascularización carotídea : aplicación de la dinámica de fluidos computacional mediante el OpenFOAM® y otras herramientas de libre distribución 

    Arias Araluce, Fausto Arturo (Date of defense: 2017-05-19)

    Stroke is a major cause of death and disability in Spain and in the Western world. It is often caused by an accumulation of atherosclerotic plaques on the walls of carotid arteries. Carotid revascularization may be the ...

    Microalgae-based wastewater treatment systems at demonstrative scale : gravity harvesting and thickening of biomass, and advanced design of bioreactors 

    Ortiz Ruiz, Antonio (Date of defense: 2021-12-17)

    Microalgae culture is currently receiving considerable attention for its potential in wastewater treatment and production of algal biomass from which high-value bioproducts and bioenergy can be obtained, as well as the ...

    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) ...

    Modeling capillarity and two-phase flow in granular media: from porescale to network scale 

    Puig Montellà, Eduard (Date of defense: 2019-07-16)

    Numerical simulations at the pore scale are a way to study the behavior of multiphase flows encountered in many natural processes and industrial applications. In this work, liquid morphology and capillary action are examined ...

    Modeling of reactive transport with particle tracking and kernel density estimators 

    Rahbaralam, Maryam (Date of defense: 2018-02-23)

    Random walk particle tracking methods are a computationally efficient family of methods to solve reactive transport problems. While the number of particles in most realistic applications is in the order of 10^6 - 10^9, the ...

    Modelling fragmentation in rockfalls 

    Matas Casado, Gerard (Date of defense: 2020-11-04)

    The fragmentation process in rockfalls is a complex phenomenon that is not well understood and only a few rockfall simulation models consider it explicitly. Fragmentation significantly affects the evaluation of the hazard ...

    MPM modelling of landslides in brittle and unsaturated soils 

    Yerro Colom, Alba (Date of defense: 2015-11-10)

    Landslides and slope instabilities represent one of the most important problems in geotechnics causing significant damages around the world every year. Understanding the mechanics of the whole process is of particular ...

    Numerical analysis of railway ballast behaviour using the Discrete Element Method. 

    Irazábal González, Joaquín (Date of defense: 2017-10-06)

    The development of high-speed train lines has increased significantly during the last twenty-five years, leading to more demanding loads in railway infrastructures. Most of these infrastructures were constructed using ...

    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 ...

    On-line coupling of volcanic ash and aerosols transport with global and regional meteorological models 

    Martí Donati, Alejandro (Date of defense: 2017-07-14)

    Explosive volcanic eruptions can eject large quantities of particulate matter that, along with other aerosol droplets and trace gases, are carried upwards into the atmosphere by the buoyant eruption column and then dispersed ...