Now showing items 59-78 of 352

    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 ...

    Comportamiento de un suelo compactado bajo un estado generalizado de tensiones 

    Weber, Rodrigo Carreira (Date of defense: 2019-12-13)

    This thesis analyzes the hydro-mechanical behavior under a generalized stress state of a compacted mixture of sand (30%) and clayey (70%) at a low density. The experimental study focuses on the analysis of shear strength ...

    Comportamiento hidro-mecánico de agregados gruesos 

    Alvarado de Menéndez, Clara Elena (Date of defense: 2017-05-18)

    Rockfill is a coarse material widely used in geotechnical works such as earth-fill dams (shoulders and toe drains), as well as in embankments and well-graded quarry materials for railway infrastructures. These structures ...

    Computational and experimental thermo-mechanics of metal additive manufacturing : stress, warpage, cracks and properties 

    Lu, Xufei (Date of defense: 2022-07-15)

    The objectives of this thesis are (i) to understand the thermal, metallurgical and mechanical behavior during AM, (ii) to shed light on the generation of residual stresses and the stress-induced deformations and cracks, ...

    Computational multiscale analysis of masonry structures 

    Petracca, Massimo (Date of defense: 2016-04-13)

    Masonry is an ancient building material that has been used throughout the history, and it is still used nowadays. Masonry constitutes the main building technique adopted in historical constructions, and a deep understanding ...

    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 ...

    Computational uncertainity quantification in pressure-driven fracture processes 

    Garikapati, Hasini (Date of defense: 2020-03-28)

    Uncertainty quantification is important in assessing and predicting the performance of complex engineering systems and processes, especially in the absence of adequate experimental or real-world data. With the increase ...

    Conformal n-dimensional bisection for local refinement of unstructured simplicial meshes 

    Belda Ferrín, Guillem (Date of defense: 2022-10-28)

    [English] In n-dimensional adaptive applications, conformal simplicial meshes must be lo cally modified. One systematic local modification is to bisect the prescribed simplices while surrounding simplices are bisected ...

    Consideraciones relativas al diseño y a la alta durabilidad de dovelas de hormigón reforzado con fibras no metálicas (HRFnM) 

    Cruz Romero, Janill Marie de la (Date of defense: 2020-07-27)

    The use of the fibre reinforced concrete (FRC) as a construction material has expanded beyond the traditional applications since the publication of design codes and structural guidelines. Fibre reinforced concrete for ...

    Constructed wetland microbial fuel cells : electricity generation, treatment efficiency improvement, COD bioindication and clogging assessment 

    Corbella Vidal, Clara (Date of defense: 2017-11-10)

    Horizontal Subsurface Flow Constructed Wetlands (HSSF CWs) are natural wastewater treatment systems showing a marked redox gradient between the surface of the system and the bottom zone of the treatment bed. Therefore, ...

    Constructed wetlands for winery wastewater treatment: Sustainability and circular economy in the wine sector 

    Flores Rosell, Laura (Date of defense: 2021-10-01)

    The wine industry generates large volumes of wastewater originating from various processes and operations carried out during wine production. Winery wastewater (WWW) is characterized by highly variable flows and loadings. ...

    Constructed wetlands operated as bioelectrochemical systems for improvement and control of wastewater treatment 

    Hartl, Marco (Date of defense: 2020-07-03)

    The objective of this work was the improvement and control of wastewater treatment using constructed wetlands operated as Microbial Fuel Cells (CW-MFCs) and Microbial Electrolysis Cells (CW-MECs). For this purpose, eight ...

    Construction and post-construction performance of vertical breakwaters on soft soils : the Port of Barcelona case 

    Madrid Argomedo, Manuel Ricardo (Date of defense: 2021-07-21)

    The design and construction of vertical caisson breakwaters on soft soils represents a significant challenge for the engineering of marine structures. Past experience reveals that this type of structures is sometimes prone ...

    Contaminants orgànics persistents i pseudopersistents en medi marí : estudi en biota i en consum humà 

    Aznar Alemany, Òscar (Date of defense: 2017-11-20)

    During the last couple of decades the demand for good quality water in sufficient quantity has increased. The administration is now aware that water is not a commercial product; that hydrological management needs to be ...

    Contribución al diseño eficiente de la configuración en planta de líneas de alta velocidad 

    Martín Cañizares, María del Pilar (Date of defense: 2015-11-16)

    Building a high-speed line requires significant investment and its design strongly influences the operation, with the aggravating circumstance that subsequent modifications not initially planned are not always feasible at ...

    Contributions to the determination of thermal behaviour of façades using quantitative internal IRT (Infrared Thermography) 

    Tejedor Herrán, Blanca (Date of defense: 2019-01-24)

    Within the European framework, most of residential buildings do not satisfy the minimum thermal specifications. In fact, the renovation rate across the EU is estimated at 1% per year. To fulfil with the goals stated by ...

    El costo del impacto sobre el litoral debido al cambio climático en Cataluña 

    Lomelí Quintero, Víctor Manuel (Date of defense: 2023-10-13)

    (English) Climate change is a major issue that is having a significant impact on coastal areas globally. This phenomenon is generating processes of erosion, flooding and sea level rise, which is of great concern. These ...

    Coupling shallow water models with three-dimensional models for the study of fluid-structure interaction problems using the particle finite element method 

    Maso Sotomayor, Miguel (Date of defense: 2022-09-29)

    (English) This thesis investigates numerical methods for the simulation of surface water flows, focusing on the interaction between the large scale and the local scale and its application to natural hazards. Several families ...

    Daño sísmico y propiedades modales en estructuras de edificación 

    Alva Bañuelos, Rodrigo Esteban (Date of defense: 2021-09-17)

    The time required to inspect damaged structures after an earthquake has a direct impact on the social and economic consequences of the event, which can be catastrophic. Developing tools to aid the inspection task is of ...

    Data–driven Bayesian networks modelling to support decision–making : application to the context of Sustainable Development Goal 6 on water and sanitation 

    Requejo Castro, David (Date of defense: 2021-07-13)

    We live in a complexand interconnected world which permeates ditterent scales. sectors or decision problems. This fact is acknowledged by the United Nations 2030 Agenda for Sustainable Development, which underscores current ...