Departament de Màquines i Motors Tèrmics: Recent submissions
Now showing items 21-40 of 75
Multiphysics simulation in buildings
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 ...
DNS of multiphase flows: study of atomization and free-surface phenomena
The present thesis focuses on the numerical analysis of some diverse physical set-up that involve the interaction of two -or three immiscible and incompressible phases. The simulations are carried out by means of finite-volume ...
Flow topology and small-scale dynamics in turbulent Rayleigh-Bénard convection
Without fluid turbulence, life might have rather different look. The atmosphere and oceans could nearly maintain a much larger temperature differences resulting in ultimate heating or cooling to the earth surface. The water ...
Aerodynamic analysis of complex geometries using CFD
Aerodynamic analysis has become one of the most important tools in many engineering applications. In this sense, this thesis work is aimed at performing aerodynamic analysis of different geometries, expanding the available ...
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 ...
Towards a virtual platform for aerodynamic design, performance assessment and optimization of horizontal axis wind turbines
This thesis focuses on the study and improvement of the techniques involved on a virtual platform for the simulation of the Aerodynamics of Horizontal Axis Wind Turbines, with the ultimate objective of making Wind Energy ...
Parallel optimization algorithms for high performance computing : application to thermal systems
The need of optimization is present in every field of engineering. Moreover, applications requiring a multidisciplinary approach in order to make a step forward are increasing. This leads to the need of solving complex ...
Real-time nonlinear model predictive control for thermal management in a plug-in hybrid electric vehicle
Several socioeconomic factors are leading governments to encourage electric powered vehicles. Currently, the bottleneck for electric vehicles mass production lies in the high voltage battery technology. One of the main ...
Numerical simulation of sensible and latent thermal energy storage systems
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 ...
Parallel object-oriented algorithms for simulation of multiphysics : application to thermal systems
The present and the future expectation in parallel computing pose a new generational change in simulation and computing. Modern High Performance Computing (HPC) facilities have high computational power in terms of operations ...
Numerical study of the non-Oberbeck-Boussinesq effects in turbulent water-filled cavities
The work carried out in the framework of the present thesis aims at shedding light into the complex phenomena involved in turbulent water-filled cavities, questioning the validity of the well-established Oberbeck-Boussinesq ...
Directrices energéticas integrales en edificios de oficinas transparentes (TOBEE)
The main objective of this Thesis is to determine the behaviour, the energetic and economic feasibility, and the comfort conditions in office buildings, specifically for solutions with high proportions of glazing on facades ...
Heterogeneous parallel algorithms for computational fluid dynamics on unstructured meshes
Frontiers of computational fluid dynamics (CFD) are constantly expanding and eagerly demanding more computational resources. Currently, we are experiencing an rapid evolution in the high performance computing systems driven ...
Numerical simulation of turbulent diffusion flames using flamelet models on unstructured meshes
The present thesis aims at developing numerical methods and algorithms for the efficient simulation of diffusion flames in the flamelet regime. To tackle turbulent chemically reacting flows a double framework is used in ...
Numerical modeling of complex heat transfer phenomena in cooling applications
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 ...
A study of hybrid powertrains and predictive algorithms applied to energy management in refuse-collecting vehicles
There is an increasing demand for vehicles with lower environmental impact and higher fuel efficiency. To meet these requirements, powertrain hybridization has been introduced in both academia and industry during recent ...
Numerical study and experimental optimization of air curtains
he main objective of the present thesis is to study and optimize the sealing efficiency of air curtains. Therefore, the phenomenology of the breakthrough and the parameters which affect it has been studied. However, ...
Modelling and experimental validation of water vapor absorption by falling films of LiBr aqueous solution under wave regimes conditions and presence of non-absorbable gases
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) ...
Numerical simulations of thermal storage systems : emphasis on latent energy storage using phase change materials (PCM)
The present thesis aims at studying the use of phase change materials (PCM) in thermal energy storage (TES) applications and to develop and implement numerical tools for their evaluation. Numerical analysis is nowadays an ...
Energy efficient ventilation strategies for surgery rooms
Surgery rooms are a space type with particularly stringent indoor environmental quality (IEQ) requirements, which translate into high energy use. Due to the unclear IEQ and infection control requirements for surgery rooms ...
