Now showing items 27-46 of 75
González Castro, Josep Ramon (Date of defense: 2001-07-25)
En les últimes dècades s'han impulsat nombroses investigacions adreçades a optimitzar el disseny, la fabricació i l'explotació de centrals de cogeneració i, en particular, les que són accionades per motors alternatius ...
Vidal Jiménez, Bárbara (Date of defense: 2007-07-09)
En este trabajo se ha realizado una simulación numérica detallada del fenómeno de cambio de fase sólido-líquido, por ser esta fenomenología de gran interés en diferentes áreas industriales. <br/>La simulación realizada ...
García Rivera, Eduardo (Date of defense: 2015-04-17)
Esta tesis se centra en el estudio de los diferentes mecanismos implicados en la absorción de vapor de agua en películas descendentes de configuración vertical (tipica configuracion para absorbedores enfriados por aire) ...
Muela Castro, Jordi (Date of defense: 2018-04-11)
The present thesis is devoted to the development and implementation of mathematical models and numerical methods in order to carry out computational simulations of complex heat and mass transfer phenomena. Several areas ...
Souaihi, Oussama (Date of defense: 2017-12-22)
Numerical simulation play an important role in the design, engineering, operation and management of buildings. It can help reducing energy consumption, improving indoor air quality and thermal comfort and provide quantitative ...
Pont Vilchez, Arnau (Date of defense: 2020-12-17)
The use of hybrid RANS-LES methods has become widespread during the last decade, as an interesting approach for covering the gap between RANS and LES turbulence models in terms of both computational resources and degree ...
Mora Acosta, Josue (Date of defense: 2001-12-20)
The target of this work is to contribute to the enhancement of numerical methods for the simulation of complex thermal systems. Frequently, the factor that limits the accuracy of the simulations is the computing power: ...
Sadurní Caballol, Alexandre (Date of defense: 2012-09-28)
The aim of this work is to study the thermal behavior and fluid-dynamic systems, vapor compression refrigeration and its components (heat exchangers, expansion devices, compressors, connecting pipes, pumps and pressure ...
Kessentini, Hamdi (Date of defense: 2014-02-14)
In this thesis a flat plate collector (FPC) with plastic transparent insulation materials (TIM) and a low-cost overheating protection system destined for heat supply from 80 to 120°C is presented. A ventilation channel ...
Zhang, Hao (Date of defense: 2014-11-28)
This thesis focuses on the numerical investigation of the particle-fluid systems based on the Discrete Element Method (DEM). The whole thesis consists of three parts, in each part we have coupled the DEM with different ...
Colomer Rey, Guillem (Date of defense: 2006-06-26)
L'objectiu principal d'aquesta tesi es l'estudi de la transferència d'energia per radiació. Per aquest motiu, s'ha estudiat la fenomenologia bàsica de la transferencia de calor per radiació. Tenint en compte el tipus ...
Hou, Xiaofei (Date of defense: 2015-06-26)
Multiphase and multicomponent flows are frequently encountered in the cooling applications due to combined heat transfer and phase change phenomena. Two-fluid and homogeneous mixture models are chosen to numerically study ...
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) ...
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 ...
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, ...
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) ...
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 ...
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. ...
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 ...
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 ...