Now showing items 3989-4008 of 5538

    Numerical modelling of a parabolic trough solar collector 

    Hachicha, Ahmed Amine (Date of defense: 2013-09-30)

    Concentrated Solar Power (CSP) technologies are gaining increasing interest in electricity generation due to the good potential for scaling up renewable energy at the utility level. Parabolic trough solar collector (PTC) ...

    Numerical modelling of complex geomechanical problems 

    Pérez Foguet, Agustí (Date of defense: 2000-12-01)

    La tesis se centra en el desarrollo de técnicas numéricas específicas para la resolución de problemas de mecánica de sólidos, tomando como referencia aquellos que involucran geomateriales (suelos, rocas, materiales ...

    Numerical modelling of constructed wetlands for wastewater treatment 

    Samsó Campà, Roger (Date of defense: 2014-03-28)

    Constructed Wetlands (CWs) are a wastewater treatment technology that inherits the purification potential of natural wetlands and optimizes it to comply with regulations for treated discharges. CWs have become an equally ...

    Numerical modelling of microalgae systems for wastewater treatment 

    Solimeno, Alessandro (Date of defense: 2017-05-04)

    Reactions and processes that occur in microalgae and bacteria systems are difficult to understand because most of them take place simultaneously and depend on many parameters such as temperature, solar radiation, nutrients ...

    Numerical modelling of the growth and remodelling phenomena in biological tissues 

    Comellas Sanfeliu, Ester (Date of defense: 2016-02-05)

    Living biological tissues are complex structures that have the capacity of evolving in response to external loads and environmental stimuli. The adequate modelling of soft biological tissue behaviour is a key issue 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 resolution of turbulent flows on complex geometries. 

    Lehmkuhl Barba, Oriol (Date of defense: 2012-07-26)

    This thesis aims at developing a numerical methodology suitable for the direct numerical simulation (DNS) and large-eddy simulation (LES) of turbulent flows in order to be used in complex flows, currently encountered in ...

    Numerical simulation and experimental validation of hermetic reciprocating compressors. Integration in vapour compression refrigerating systems 

    Rigola Serrano, Joaquim (Date of defense: 2002-09-27)

    The numerical simulation model presented is based on the integration of the fluid conservation equations (continuity, momentum and energy) in the whole compressor domain (compression chamber, valves, manifolds, mufflers, ...

    Numerical simulation and experimental validation of vapor compression refrigerating systems: special emphasis on natural refrigerants 

    Ablanque Mejía, Nicolás (Date of defense: 2010-07-21)

    The aim of this work is to study the thermal and fluid-dynamic behavior of vapor compression refrigerating systems and their constitutive elements (heat exchangers, expansion devices, compressors and connecting tubes) ...

    Numerical simulation of flames using flamelet models 

    Ahmad, Shamshad (Date of defense: 2017-04-06)

    The thesis topic is located in the domain of numerical simulation of laminar flames. The principal aim of the presented research is the study of numerical techniques for the multidimensional simulation of flames with low ...

    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 simulation of bubbles and drops in complex geometries by using dynamic meshes 

    Gutiérrez Álvarez, Enrique (Date of defense: 2018-07-17)

    CFD techniques are important tools for the study of multiphase flows, because most of the physical phenomena of these flows often happen on space and time scales where experimental methodologies are impossible in practice. ...

    Numerical simulation of fatigue processes : application to steel and composite structures 

    Barbu, L. G. (Lucia Gratiela) (Date of defense: 2016-02-01)

    The present thesis aims at advancing an innovative computational methodology that simulates steel and composite material fracture under cyclic loading following a phenomenological approach, with calibration from both small ...

    Numerical simulation of frost growth and densification using deformable and static grids 

    Bartrons Casademont, Eduard (Date of defense: 2018-10-05)

    The present thesis aims at developing a basis for the numerical simulation of the growth and densification of macroscopic frost sheets. Notwithstanding the fact that icing has still a long way to fully understand its ...

    Numerical simulation of multi-fluid flows with the Particle Finite Element Method 

    De Mier Torrecilla, Monica (Date of defense: 2010-06-29)

    La presencia simultánea de múltiples fluidos con diferentes propiedades ocurre en numerosos problemas medioambientales, procesos industriales y situaciones de la vida diaria. Algunos ejemplos son la interacción fluido-combustible ...

    Numerical simulation of multiphase flows : level-set techniques 

    Balcázar Arciniega, Néstor Vinicio (Date of defense: 2014-09-30)

    This thesis aims at developing numerical methods based on level-set techniques suitable for the direct numerical simulation (DNS) of free surface and interfacial flows, in order to be used on basic research and industrial ...

    Numerical simulation of multiphase immiscible flow on unstructured meshes 

    Jofre Cruanyes, Lluís (Date of defense: 2014-07-25)

    The present thesis aims at developing a basis for the numerical simulation of multiphase flows of immiscible fluids. This approach, although limited by the computational power of the present computers, is potentially very ...

    Numerical simulation of Newtonian/non-Newtonian multiphase flows : deformation and collision of droplets 

    Amani, Ahmad (Date of defense: 2019-07-24)

    The complex nature of multiphase flows, particularly in the presence of non-Newtonian rheologies in the phases, limits the applicability of theoretical analysis of physical equations as well as setting up laboratory ...

    Numerical Simulation of Non-premixed Laminar and Turbulent Flames by means of Flamelet Modelling Approaches 

    Claramunt Altimira, Kilian (Date of defense: 2005-02-18)

    Deep knowledge of combustion phenomena is of great scientific and technological interest. In fact, better design of combustion equipments (furnaces, boilers, engines, etc) can contribute both in the energy efficiency and ...

    Numerical simulation of sensible and latent thermal energy storage systems 

    Torras Ortiz, Santiago (Date of defense: 2016-02-05)

    El objetivo principal de esta tesis es la resolución numérica de problemas de transferencia de calor y dinámica de fluidos y su aplicación para el estudio del comportamiento transitorio de sistemas térmicos de acumulación ...