Now showing items 1-20 of 29

  • A level-set model for thermocapillary motion of deformable fluid particles 

    Balcázar Arciniega, Néstor; Rigola Serrano, Joaquim; Castro González, Jesús; Oliva Llena, Asensio (2016-12-01)
    Article
    Restricted access - publisher's policy
    A new level-set model is proposed for simulating immiscible thermocapillary flows with variable fluid-property ratios at dynamically deformable interfaces. The Navier–Stokes equations coupled with the energy conservation ...
  • A parallel finite-element framework for the thermal analysis of metal additive manufacturing with powder methods 

    Miranda Neiva, Eric (Universitat Politècnica de Catalunya, 2016-10-21)
    Master thesis
    Restricted access - author's decision
    Virtual design process and validation of products built with metal additive manufacturing technologies with powder methods is not possible without a coupled thermomechanical numerical analysis tool that is capable of ...
  • 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 a size-dependent model for the latent heat of small tin nanoparticles 

    González Esteve, Adrià (Universitat Politècnica de Catalunya, 2016-07)
    Master thesis
    Open Access
    The classical formulation for the Stefan problem at the nanoscale does not work because the melting temperature and the effective latent heat decrease with the nanoparticle size. In this work, a model for the effective ...
  • 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 ...
  • Computational fluid dynamics modeling of impinging gas-jet systems: I. Assessment of eddy viscosity models 

    Coussirat Núñez, Miguel Gustavo; van Beeck, J; Mestres Ridge, Marc; Egusquiza Estévez, Eduard; Buchlin, J-M; Escaler Puigoriol, Francesc Xavier (2005-07-15)
    Article
    Restricted access - publisher's policy
    Computational fluid dynamics plays an important role in engineering design. To gain insight into solving problems involving complex industrial flows, such as impinging gas-jet systems (IJS), an evaluation of several eddy ...
  • 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 ...
  • Convective heat transfer around vertical jet fires: an experimental study 

    Kozanoglu, Bulent Kozanoglu; Zárate López, Luis; Gómez-Mares, Mercedes; Casal Fàbrega, Joaquim (Elsevier, 2011-12)
    Article
    Restricted access - publisher's policy
    The convection heat transfer phenomenon in vertical jet fires was experimentally analyzed. In these experiments, turbulent propane flames were generated in subsonic as well as sonic regimes. The experimental data demonstrated ...
  • Coupling CFD models of airflow with building simulation with an object-oriented and parallel infrastructure 

    Damle, Rashmin; Lehmkuhl Barba, Oriol; Rodríguez Pérez, Ivette María; Oliva Llena, Asensio (2012)
    Conference report
    Restricted access - publisher's policy
    Integrating CFD & HT models with the general building program raises the computational time of building simulations as these simulations are usually performed over a period of one year. Within this context, our aim is ...
  • 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 ...
  • Estudi experimental i numèric d'un bescanviador de calor 

    Riera Santacreu, Martí (Universitat Politècnica de Catalunya, 2017-01-10)
    Bachelor thesis
    Open Access
    El treball present tracta sobre la realització d'un estudi experimental i numèric del bescanviador de flux creuat que disposa el departament de Mecànica de Fluids de l'EEBE. S'ha dut a terme una primera part experimental ...
  • Estudio de fenómenos de transferencia de calor y dinámica de fluidos mediante los métodos de Lattice Boltzmann y volúmenes finitos 

    Sargsyan, Tigran (Universitat Politècnica de Catalunya, 2012-09)
    Master thesis (pre-Bologna period)
    Open Access
    El trabajo se divide en tres partes fundamentales. En la primera parte (capítulo 1) se tratan las ecuaciones que rigen la dinámica de fluidos, que son las de Navier- Stokes. Se presentan las adimensionalizaciones de las ...
  • Experimental study of heat transport in fractured network 

    Pastore, Nicola; Cherubini, claudia; Gassi, C.I.; Allegretti, N.M.; Redondo Apraiz, José Manuel; Tarquis Alfonso, Ana Maria (2015-07-01)
    Article
    Open Access
    Fractured rocks play an important role in transport of natural resources through subsurface systems. In recent years, interest has grown in investigating heat transport by means of tracer tests, driven by the important ...
  • Flow analysis in the HCLL-TBM ITER channels including MHD and heat transfer 

    Mas de les Valls Ortiz, Elisabet; Fradera, Jordi; Batet Miracle, Lluís (2010)
    Conference lecture
    Open Access
    One of the key components regarding heat transfer and tritium inventories in deuterium-tritium nuclear fusion reactors is the (tritium) Breeding Blanket, called Test Blanket Module or TBM in ITER experiment. Several ...
  • Heat and moisture insulation by means of air curtains: application to refrigerated chambers 

    Giráldez García, Héctor; Pérez Segarra, Carlos David; Oliet Casasayas, Carles; Oliva Llena, Asensio (Elsevier, 2016-08)
    Article
    Restricted access - publisher's policy
    The present study is devoted to the determination of the efficiency of air curtain units (ACUs) applied to heat and moisture insulation of refrigerated chambers. A detailed study of the fluid dynamics and heat and mass ...
  • Heat transfer at the nanoscale : The hyperbolic heat equation 

    Irastorza Ugalde, Beñat (Universitat Politècnica de Catalunya, 2015-07)
    Bachelor thesis
    Open Access
    The interest of taking technology to increasingly small scales has required great changes and advances in science. In particular, the well-known Fourier's law (very useful in large scales) has proved to be not accurate ...
  • Indus3es: test rig calibration and initial operation of an absorption heat transformer 

    Oliver Binimelis, Antoni (Universitat Politècnica de Catalunya, 2018-01-28)
    Bachelor thesis
    Open Access
    The absorption heat transformer is technology known for years, which heats water to high temperature from a heat supply at a medium temperature. This heat supply is usually waste heat coming from a chemical or petrochemical ...
  • Numerical and experimental investigation of a vertical LiBr falling film absorber considering wave regimes and in presence of mist flow 

    Garcia Rivera, Eduardo; Castro González, Jesús; Farnós Baulenas, Joan; Oliva Llena, Asensio (2016-11-01)
    Article
    Restricted access - publisher's policy
    The absorber represents the most critical component in absorption systems and one of the key issues. In this component complex heat and mass transfer phenomena during the absorption process takes place simultaneously. For ...
  • Numerical simulation of wind flow around a parabolic trough solar collector 

    Amine Hachicha, Ahmed; Rodríguez Pérez, Ivette María; Castro González, Jesús; Oliva Llena, Asensio (2013-07-01)
    Article
    Restricted access - publisher's policy
    The use of parabolic trough solar technology in solar power plants has been increased in recent years. Such devices are located in open terrain and can be the subject of strong winds. As a result, the stability of these ...