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Now showing items 30633-30652 of 41821
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 ...
Numerical Simulation of Non-premixed Laminar and Turbulent Flames by means of Flamelet Modelling Approaches
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 oil spills in coastal areas using shallow water equations in generalised coordinates
The pollution generated by accidental marine oil spills can cause persistent ecological disasters and lead to serious social and economical damages. Numerical simulations are a valuable tool to make proper decisions in ...
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 ...
Numerical simulation of shallow water equations and some physical models in image processing
There are two main subjects in this thesis: the first one deals with the numerical simulation of shallow water equations, the other one is the resolution of some problems in image processing<br/><br/>The first part of this ...
Numerical simulation of the thermal and fluid dynamics behaviour of liquid-vapour two-phase flow in evaporators and condensers
Un estudio numérico del comportamiento térmico y fluido-dinámico de flujos bifásicos, liquido-gas, en conductos es presentado. El análisis numérico es basado en dos diferentes modelos. El primer modelo es conocido como ...
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 Simulation of Turbulent Flows. Multiblock Techniques. Verification and Experimental Validation
Work here presented is the result of basic research in key aspects of the currently available engineering tools and methodologies for the design, optimisation and development of thermal systems and equipment: turbulence ...
Numerical simulations of particle turbulent dispersion and deposition with implications for the spreading of airborne diseases
Aquesta tesi doctoral examina la dinàmica de partícules en fluxos turbulents mitjançant simulacions numèriques, enfocant-se en dos escenaris clau: els fluxos generats per l'exhalació i els impulsats per flotabilitat en ...
Numerical simulations of primordial black holes
This thesis has been devoted to the study of the gravitational collapse of spherically symmetric perturbations on a Friedman-Robertson-Walker (FRW) universe filled by a perfect fluid. Large cosmological perturbations ...
Numerical simulations of the DCMIX microgravity thermodiffusion experiments to assess the impact of typical International Space Station reboosting manoeuvres
En aquesta tesi s'ha analitzat l'impacte que les maniobres vehiculars impulsives (reboostings) de l'Estació Espacial Internacional (ISS) tenen sobre els experiments de la sèrie DCMIX. En primer lloc, l'entorn microgravitatorio ...
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 ...
Numerical solution of 3-D electromagnetic problems in exploration geophysics and its implementation on massively parallel computers
The growing significance, technical development and employment of electromagnetic (EM) methods in exploration geophysics have led to the increasing need for reliable and fast techniques of interpretation of 3-D EM data ...
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, ...
Numerical study of bio-fluids and mass transfer processes through membranes
La reologia de la sang (hemoreología) exerceix un ppel important en la perforació de teixits i l'alteració de les seves condicions fisiològiques és gairebé sempre la principal causa de patologies cardiovasculars. Per tant, ...
Numerical study of hopf bifurcations in the two-dimensional plane poiseuille flow
In this work we try to analyse the dynamics of the Navier-Stokes equations in a problem without domain complexities as is the case of the plane Poiseuille flow. The Poiseuille problem is described as the flow of a viscous ...
Numerical study of intense cyclogenesis events in the Mediterranean basin
S'han estudiat diverses ciclogènesis mediterrànies mitjançant el model atmosfèric MM5,<br/>la inversió de vorticitat potencial per peces i la tècnica de la separació de factors. Els<br/>resultats mostren com a agents per ...
Numerical study of isothermal two-phase flow dispersion in the packed bed of a hydrodesulfurization reactor
El objetivo principal de este trabajo es predecir la dispersión de un flujo bifásico en el lecho de un reactor de hidrodesulfuración. Se consideran propiedades físicas constantes, sin incluir reacciones químicas ni procesos ...
Numerical study of the heat and mass transfer processes with the Lattice Boltzmann method: Laminar Mixed Convection in a Square Open C
El tema d’aquesta tesis és l’estudi numèric i implementació del mètode de Lattice Boltzmann utilitzant els models D2Q9 amb múltiples temps de relaxació (MTR), aquest model es aplicat en el camp de fluids, temperatura ...
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 ...
