Now showing items 137-152 of 152

    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 ...

    Thermo-hydro-mechanical impacts of carbon dioxide (CO2) injection in deep saline aquifers. 

    Vilarrasa Riaño, Víctor (Date of defense: 2012-07-20)

    Los procesos termo-hidro-mecánicos relacionados con el almacenamiento geológico de carbono deben ser entendidos y cuantificados para demostrar a la opinión pública de que la inyección de dióxido de carbono (CO2) es segura. ...

    Three-dimensional numerical analysis of flow structure and sediment transport process in open channels 

    Sánchez Cordero, Esteban (Date of defense: 2019-05-31)

    This research project focuses on the analysis and prediction of flow structures and sediment transport process in open channels by using three-dimensional numerical models. The numerical study was performed using the ...

    Topology optimization of incompressible structures for fluid-structure interaction problems 

    Castañar Pérez, Inocencio (Date of defense: 2023-07-24)

    (English) Topology optimization of incompressible structures, in which the loads on the structure come from the stresses exerted by a surrounding fluid, is a highly complex problem. This work presents a compilation of the ...

    Towards stochastic methods in CFD for engineering applications 

    Tosi, Riccardo (Date of defense: 2021-12-21)

    Recent developments of high performance computing capabilities allow solving modern science problems employing sophisticated computational techniques. However, it is necessary to ensure the efficiency of state of the art ...

    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 ...

    Tractament de la incertesa en estimació i previsió de pluja amb radars meteorològics 

    Roca Sancho, Jordi (Date of defense: 2013-10-16)

    This thesis deals with uncertainty in radar-based precipitation estimation and nowcasting in two ways: its quantification in a probabilistic manner, and its reduction in the precipitation estimates. A straightforward way ...

    Transferability assessment of railway infrastructure charges: contribution to a conceptual framework. 

    Fernández Belmonte, Diego (Date of defense: 2009-02-25)

    La evaluación preliminar de los resultados de la Reforma Ferroviaria Europea muestra la lentitud de su implementación y la existencia de insuficiencias en el nivel de competencia introducido en el mercado y en la consecución ...

    Un modelo de daño continuo para materiales-friccionales 

    Oller, S. (Sergio), 1955- (Date of defense: 1988-05-31)

    Actualmente hay diversas corrientes investigadoras que han profundizado en el estudio del comportamiento mecánico de los materiales, dejando un apreciable cúmulo de experiencias aprovechables. No obstante, se encuentran ...

    Un modelo de discontinuidades fuertes para la simulación numérica de la fractura en compresión, de piezas de hormigón armado en tres dimensiones 

    Díaz Ortíz, Guillermo Fernando (Date of defense: 2014-07-23)

    This paper presents a numerical approach for the simulation of reinforced concrete pieces in three dimensions, using embedded discontinuity elements, based on the strong discontinuity approach. In turn, this work is divided ...

    Understanding and mitigating the post-injection seismicity induced by fluid injection in enhanced geothermal systems 

    Boyet, Auregan (Date of defense: 2024-01-31)

    (English) Induced seismicity due to hydraulic stimulation and circulation is a hurdle for the development of Enhanced Geothermal Systems (EGS). The monitored seismicity has occasionally reached magnitudes large enough to ...

    Unfittted finite element methods for explicit boundary representations 

    Martorell Pol, Pere Antoni (Date of defense: 2024-02-21)

    (English) This thesis covers the development of large-scale numerical methods for the simulations of partial differential equations on arbitrarily complex geometries. The target application of this thesis is the structural ...

    Urban mobility safety in Barcelona: an evaluation of risk factors and techniques to achieve Vision Zero 

    Aiash, Ahmad (Date of defense: 2023-10-27)

    (English) In order to converge towards Vision Zero concept in road safety, traffic crashes need great study and analysis. This thesis is aimed at this goal, applied to the urban and metropolitan environment of Barcelona. ...

    Utilización de técnicas de estimación de error y generación automática de mallas en procesos de optimización estructural 

    Bugeda, G. (Gabriel) (Date of defense: 1990-03-31)

    A pesar de que la utilización del método de los elementos finitos está muy extendida, es difícil determinar el nivel de precisión de los resultados obtenidos. Para ello es necesario utilizar alguno de los mallados estimadores ...

    Wave propagation problems with aeroacoustic applications 

    Espinoza Román, Héctor Gabriel (Date of defense: 2015-05-08)

    The present work is a compilation of the research produced in the field of wave propagation modeling. It contains in-depth analysis of stability, convergence, dispersion and dissipation of spatial, temporal and spatial-temporal ...

    Zero-thickness interface elements in petroleum geomechanics : sand production and hydraulic fracture 

    Garolera Vinent, Daniel (Date of defense: 2017-09-18)

    This thesis describes the extension of the Finite Element Method with zero-thickness interface elements (FEM+z) to 3D, large and complex problems in geomaterials, with special interest in petroleum geomechanics. This general ...