Now showing items 1-20 of 39

    • 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
      Open Access
      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, Giovanni; 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 ...
    • Detailed analysis of the numerical resolution of the heat transfer and fluid flow governing equations 

      Illa José, Arnau (Universitat Politècnica de Catalunya, 2019-09-30)
      Bachelor thesis
      Restricted access - author's decision
      Primerament es proposen a l’estudiant uns casos bàsics d’integració de les equacions bàsiques de conservació de la massa, momentum i energia que li serviran per consolidar els seus coneixements en aquesta important temàtica ...
    • 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 ...
    • Film melting heat transfer from a horizontal open surface 

      Arias Montenegro, Francisco Javier (2019-05-26)
      External research report
      Open Access
      In this internal report, consideration is given to the velocity of melting from a horizontal open surface and with particular reference to polar caps and large glaciers. In current models, the melting velocity is critically ...
    • 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 ...
    • From pure conduction to homogeneous isotropic turbulence 

      Alsalti Baldellou, Àdel (Universitat Politècnica de Catalunya, 2019-01)
      Master thesis
      Open Access
      L’objectiu d’aquest treball és estudiar multiples casos relacionats amb la dinàmica de fluids i amb la transferència de calor. Més concretament, sis casos de complexitat creixent han estat abordats des de la perspectiva de ...
    • 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
      Open Access
      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 ...