Now showing items 1-20 of 64

  • A conserved phase-field system based on the Maxwell–Cattaneo law 

    Miranville, Alain; Quintanilla de Latorre, Ramón (2013-06-01)
    Article
    Restricted access - publisher's policy
    Our aim in this paper is to study a generalization of the conserved Caginalp phasefield system based on the Maxwell–Cattaneo law for heat conduction and endowed with Neumann boundary conditions. In particular, we obtain ...
  • A level-set method for interfacial heat or mass transfer in two-phase flows 

    Balcázar Arciniega, Néstor; Antepara Zambrano, Óscar; Rigola Serrano, Joaquim; Oliva Llena, Asensio (International Centre for Numerical Methods in Engineering (CIMNE), 2018)
    Conference lecture
    Restricted access - publisher's policy
    A level-set model is proposed for simulating interfacial heat or mass transfer in two-phase flows. The Navier-Stokes equations as well as the heat transfer or mass transfer equations are discretized using a finite-volume ...
  • Analysis and simulation of a thermosolar heating system using phase change material as the flowing fluid 

    Utrilla Duaso, Javier (Universitat Politècnica de Catalunya / Politecnico di Torino, 2011)
    Master thesis (pre-Bologna period)
    Restricted access - author's decision
    The increasing gas emissions and the continuous rise of fuel prices are the main reasons why new solutions for world energy demand are searched. Using Europe as an indicator, every year more than thirty per cent of the oil ...
  • Analysis of the geometric and radiative characteristics of hydrocarbon pool-fires 

    Planas Cuchi, Eulàlia; Casal Fàbrega, Joaquim; Arnaldos Viger, Josep; Muñoz, Miguel Ángel (2004-08-01)
    Article
    Restricted access - publisher's policy
    The radiation intensity at a given distance depends mainly on the radiative power and the flame’s size and shape. Considerable literature describing both experimental and theoretical studies of thermal radiation from ...
  • An immersed boundary method to conjugate heat transfer problems in complex geometries. Application to an automotive antenna 

    Favre, F.; Antepara Zambrano, Óscar; Oliet Casasayas, Carles; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David (2019-02-05)
    Article
    Restricted access - publisher's policy
    Considering that the most common reason for electronic component failure is the excessive temperature level, an efficient thermal management design can prolong the operating life of the equipment, while also increasing its ...
  • A one-phase Stefan problem with size-dependent thermal conductivity 

    Font Martínez, Francesc (2018-07-02)
    Article
    Restricted access - publisher's policy
    In this paper a one-phase Stefan problem with size-dependent thermal conductivity is analysed. Approximate solutions to the problem are found via perturbation and numerical methods, and compared to the Neumann solution for ...
  • Aplicación de los métodos numéricos basados en volúmenes finitos para la resolución de problemas de mecánica de fluidos y sólidos termoelásticos 

    González Acedo, Ignacio (Universitat Politècnica de Catalunya, 2013-10)
    Master thesis (pre-Bologna period)
    Open Access
    Este proyecto representa una introducción al análisis numérico computacional para resolver problemas dinámicos con transferencia de calor en medios continuos. El objetivo es, en primer lugar, implementar un código orientado ...
  • A suitable criterion for tube sizing in reverse cycle machines 

    Rivero Vilà, Oriol del (Universitat Politècnica de Catalunya / Université de Lorraine, 2011)
    Master thesis (pre-Bologna period)
    Open Access
    To find the optimal diameters for the connecting tubes in reverse cycle machines we use in this paper a new criterion that we have recently developed, the Ecological Cost, “EC" (Kheiri et al. 2011) EC includes the environmental ...
  • Combined heat and moisture transfer in buildings systems 

    Damle, Rashmin; Lehmkuhl Barba, Oriol; Rigola Serrano, Joaquim; Oliva Llena, Asensio (2012)
    Conference report
    Restricted access - publisher's policy
    Temperature and humidity are the two main parameters indicating the comfort level of the building occupants. Although the effect of temperature is taken into account in thermal simulation of buildings, the moisture transfer ...
  • Comparison of drop evaporation models on hot surface 

    González Esteve, Adrià (Universitat Politècnica de Catalunya / Politecnico di Milano, 2014)
    Bachelor thesis
    Open Access
    Covenantee:  Politecnico di Milano
    This project is a study of how a sessile drop evaporates on a hot surface. Some existing models of droplet evaporation are explained, understood, simulated and compared. This project also provides an expression of drop ...
  • Comparison of thermal performance of 3D printer liquefiers through finite element models 

    Jerez Mesa, Ramón; Travieso Rodriguez, Jose Antonio; Gómez Gras, David; Llumà Fuentes, Jordi; Traver Ramos, Oriol (2016)
    Conference report
    Open Access
    Open source 3D printers have experienced an intense expansion during the last years, mainly because of their accessibility and the vast availability of information thanks to user communities. This fact presents researchers ...
  • Concentrated solar in a fluidized bed 

    Terme Turmo, Alex (Universitat Politècnica de Catalunya, 2017-09)
    Master thesis
    Open Access
    The aim of this thesis is to create a CFD model of a fluidized bed to study the heat transfer having concentrated solar as a heat source. First, some background about concentrated solar energy, a review of its actual ...
  • Construction and optimization of a device for enhanced cooling 

    Reguera Robledo, José Ángel (Universitat Politècnica de Catalunya / Technishe Universität Darmstadt, 2009)
    Master thesis (pre-Bologna period)
    Restricted access - author's decision
    The development of faster processors for computer is depending at the moment on optimizing the heat removal. This is the motivation for the Center of Smart Interfaces to do research in this field. Cooling, using two phase ...
  • Control of heat flux using computationally designed metamaterials 

    Fachinotti, Víctor D.; Peralta, Ignacio; Huespe, Alfredo Edmundo; Ciarbonetti, A. (2016)
    Conference report
    Open Access
    To gain control over the diffusive heat flux in a given domain, one has to design metamaterials with a specifc distribution of the generally anisotropic thermal conductivity throughout the domain. Until now, the appropriate ...
  • Design of microdistillation device 

    Capdevila Cullerés, Jaume (Universitat Politècnica de Catalunya, 2017-09)
    Bachelor thesis
    Open Access
    Covenantee:  Technische Universität Darmstadt
    During the last decades, scientists had been widely attracted for microchemical processing technology, due to its efficient mass and energy transfer as well as the increased safety they provide. Microstructured devices ...
  • Direct numerical simulation of the turbulent natural convection flow in an open cavity of aspect ratio 4 

    Chiva Segura, Jorge; Lehmkuhl Barba, Oriol; Borrell Pol, Ricard; Oliva Llena, Asensio (Begell House, 2012)
    Conference report
    Open Access
    In this paper, three-dimensional turbulent natural convection heat transfer in an open cavity with an isothermal wall facing the overture has been studied. The aspect ratio chosen for the cavity has been 4 to complement the ...
  • Disseny de la refrigeració de LEDs d’alta potència mitjançant heat pipes 

    Pérez Ordeig, Aleix (Universitat Politècnica de Catalunya, 2012-06)
    Master thesis (pre-Bologna period)
    Open Access
    En el present projecte es realitza un disseny de refrigeració de LEDs d’alta potència mitjançant tecnologia heat pipe: un dispositiu que utilitza el canvi de fase d’un fluid que circula pel seu interior per transmetre ...
  • Disseny d’un sistema de dissipació integrat i dessasistit per evitar sobreescalfaments en instal·lacions solars tèrmiques 

    Sabaté Galobardes, Josep (Universitat Politècnica de Catalunya, 2011-04)
    Master thesis (pre-Bologna period)
    Open Access
    En el següent document es tracta la problemàtica del sobreescalfament en les instal·lacions solars tèrmiques. Aquestes instal·lacions, degut a les condicions externes, han d’estar aprovisionats amb un sistema de dissipació ...
  • Disseny i fabricació d'un intercanviador de calor 

    Vergés i Pallejà, Akot (Universitat Politècnica de Catalunya, 2014-01-08)
    Bachelor thesis
    Open Access
    Aquest projecte consisteix en el disseny i fabricació d‟un intercanviador de calor. S‟ha realitzat diversos càlculs tèrmics de diferents casos possibles amb el mètode de càlcul manual i mitjançant un programa de càlcul ...
  • Estudi de millora de la nevera de transport de sang 

    Fontanals Montaner, Adrià (Universitat Politècnica de Catalunya, 2016-06)
    Master thesis (pre-Bologna period)
    Restricted access - confidentiality agreement