Departament de Màquines i Motors Tèrmics: Envíos recientes
Mostrando ítems 1-20 de 75
Development of linear solvers for large-scale CFD simulations on hybrid supercomputers
(English) Divergence constraints are present in the governing equations of many physical phenomena, and they usually lead to a Poisson equation whose solution is one of the most challenging parts of scientific simulation ...
Application of experimental and numerical methodologies for the development of an absortion heat pump for solar-driven systems
(English) The topics explained in this thesis are organized in different chapters. A summary of the contents is given below: Chapter 2. Details of working pairs and properties with numerical modelling and experimental ...
High-order finite volume method for solid dynamics in fluid-structure interaction applications
(English) This thesis aims at developing a high-order finite volume method for solid dynamics on unstructured three-dimensional meshes. The adoption of high-order interpolation methods has a key importance in the efficient ...
A hierarchical parallel implementation model for algebra-based CFD simulations on hybrid supercomputers
(English) Continuous enhancement in hardware technologies enables scientific computing to advance incessantly and reach further aims. Since the start of the global race for exascale high-performance computing (HPC), ...
Development of CFD-based multi-fidelity surrogate models for indoor environmental applications
This thesis presents a methodology for CFD-based multi-fidelity surrogate models for indoor environmental applications. The main idea of this work is to develop a model that has accuracy comparable to CFD simulations but ...
Computational modeling of adsorption packed bed reactors and solar-driven adsorption cooling systems
Environmental concerns regarding climate change and ozone depletion urge for a paradigm shift in the cooling production. The cooling demand exhibits an alarmingly increasing trend, thus its satisfaction in a sustainable ...
On the development of direct numerical simulations for falling films
Multiphase flows present a rich variety of physical instabilities, which may turn into a set of interesting techonological features. In the particular case of vertical fallings films, these features provide with short ...
A new grey area mitigation technique for DES : theory and assessment
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 ...
Developing numerical methods for fully-coupled nonlinear fluid-structure interaction problems
This thesis is dedicated to developing numerical methods to solve fluid-structure interaction (FSI) problems. FSI features in a vast range of physical systems and has a wide application in engineering. The work of this ...
Numerical simulation of Newtonian/non-Newtonian multiphase flows : deformation and collision of droplets
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 ...
Efficient wall modeling for large eddy simulations of general non-equilibrium wall-bounded flows
The main purpose of this thesis has been to contribute to the development of methodologies for wall modeling Large Eddy Simulations (LES) of wall-bounded flows, especially those at high Reynolds numbers. This flow configuration ...
Efficient CAD based adjoint optimization of turbomachinery using adaptive shape parameterization
The present thesis incorporates the CAD model into an adjoint-based optimization loop and uses it for the shape optimization of a 2D transonic turbine blade mid-section (profile). This is demonstrated by performing a single ...
On the numerical simulation of compressible flows
In this thesis, numerical tools to simulate compressible flows in a wide range of situations are presented. It is intended to represent a step forward in the scientific research of the numerical simulation of compressible ...
Development of a finite volume method for elastic materials and fluid-solid coupled applications
This thesis presents the development of a parallel finite volume numerical method to analyse thermoelastic and hyperelastic materials and applied problems with mutual interaction between a fluid and a structure. The ...
Filtering in the numerical simulation of turbulent compressible flow with sysmmetry preserving discretizations
The present thesis investigates how explicit filters can be useful in numerical simulations of turbulent, compressible flow with symmetry preserving discretizations. Such explicit filters provide stability to simulations ...
Adaptive mesh refinement method for CFD applications
The main objective of this thesis is the development of an adaptive mesh refinement (AMR) algorithm for computational fluid dynamics simulations using hexahedral and tetrahedral meshes. This numerical methodology is applied ...
Numerical simulation of frost growth and densification using deformable and static grids
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 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. ...
Modelling and numerical simulation of combustion and multi-phase flows using finite volume methods on unstructured meshes
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 ...
Curat tèrmic i fotocurat de resines epoxi per al control químic de la contracció i millora de la degradabilitat
S’ha estudiat la copolimerització de resines epoxi amb una spirobislactona com a comonòmer per tal de controlar la contracció química durant el curat i millorar la seva degradabilitat per tal d’afavorir la seva recuperació ...
