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Now showing items 30640-30659 of 41875
Numerical modeling of metal cutting processes using the Particle Finite Element Method
Metal cutting or machining is a process in which a thin layer or metal, the chip, is removed by a wedge-shaped tool from a large body. Cutting is a complex physical phenomena in which friction, adiabatic shear bands, ...
Numerical modeling of simple laboratory experiments of rotating flows
Despite the large amount of research which has been conducted on turbulent flows, a full understanding of their dynamics as well as the mechanisms involved in the onset of turbulence is still missing. Experimental studies ...
Numerical modeling of the underwater acoustic impact of offshore stations
The design of offshore power stations (for wind, wave or tidal energy generation) requires assessing their environmental impact. In particular, it is of the major importance to predict the impact of the generated subsea ...
Numerical modeling of transient multiphase thermo–mechanical problems: Application to the oceanic lithosphere
Los modelos numéricos son una herramienta muy útil a la hora de estudiar la geodinámica de gran escala, la interpretación entre litosfera y manto o entre distintas placas tectónicas. En este trabajo se desarrolla una nueva ...
Numerical modelling of nanoporous anodic alumina photonic structures for optical biosensing
Alguns materials mostren propietats físiques, òptiques i químiques particulars en la nanoescala. La nanotecnologia permet al científic millorar les seves propietats modificant l'estructura de la matèria en aquest nivell i ...
Numerical modelling based on the multiscale homogenization theory. Application in composite materials and structures
A multi-domain homogenization method is proposed and developed in this thesis based on a two-scale technique. The method is capable of analyzing composite structures with several periodic distributions by partitioning the ...
Numerical modelling of a parabolic trough solar collector
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
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
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
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
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
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 production of vowels and diphthongs using finite element methods
Recentment, les simulacions tridimensionals per ordinador han esdevingut bastant populars per modelar l’acústica del tracte vocal. Aquestes són capaces de superar algunes de les limitacions clàssiques de les tècniques ...
Numerical Relativity studies in Anti-de Sitter spacetimes: Gravitational Collapse and the AdS/CFT correspondence
In this thesis we study several open problems using Numerical Relativity on asymptotically Anti-de Sitter (AdS) spacetimes. The understanding of the dynamics of AdS is interesting not only because of pure theoretical reasons ...
Numerical resolution of turbulent flows on complex geometries.
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
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
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
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
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
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. ...
