Now showing items 1-20 of 195

  • A 3D CFD numerical study of the bubble generation process into a bubble Tjunction generator and its comparison with experimental data: Part I 

    Arias Calderón, Santiago; Villardi de Montlaur, Adeline de (2016)
    Conference report
    Open Access
    This work presents a 3D numerical study of the bubble generation process into a bubble generator obtained with the commercial Computational Fluid Dynamics solver ANSYS Fluent v15.0.7, and its comparison with experimental ...
  • A 8-neighbor model lattice Boltzmann method applied to mathematical-physical equations 

    An, Bo; Bergadà Granyó, Josep Maria (2016-10-26)
    Article
    Open Access
    A lattice Boltzmann method (LBM) 9-bit model is presented to solve mathematical-physical equations, such as, Laplace equation, Poisson equation, Wave equation and Burgers equation. The 9-bit model has been verified by ...
  • Active flow control on laminar flow over a backward facing step 

    Mushyam, Aditya; Bergadà Granyó, Josep Maria (Institute of Physics (IOP), 2015-09-21)
    Article
    Open Access
    In the present study, two dimensional flow over a backward-facing step in laminar flow regime with application of active flow control (AFC) technique is analysed. The aim of the present work is to gauge the effectiveness ...
  • A dynamic load balancing method for the evaluation of chemical reaction rates in parallel combustion simulations 

    Muela Castro, Jordi; Borrell Pol, Ricard; Ventosa Molina, Jordi; Jofre Roca, Lluís; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David (Elsevier, 2019-08-15)
    Article
    Restricted access - publisher's policy
    The development and assessment of an efficient parallelization method for the evaluation of reaction rates in combustion simulations is presented. Combustion simulations where the finite-rate chemistry model is employed ...
  • Aerodynamic performance of the rear spoiler of a Formula Renault V3.5 2007 

    Pla Navarro, Roger (Universitat Politècnica de Catalunya, 2011-04-13)
    Bachelor thesis
    Restricted access - author's decision
    L’objectiu d’aquest projecte és simular el comportament de l’aleró posterior d’un cotxe de competició de les World Series by Renault 3.5 a mesura que es mou per l’aire. Per tant, s’estudiaran les diverses forces ...
  • A first estimate for a pressure-retarded osmosis-driven thermosyphon 

    Arias Montenegro, Francisco Javier (2017-12-01)
    Article
    Open Access
    Pressure retarded osmosis (PRO) process and its significance for thermosyphon technology is discussed. In previous work the possibility to drive a thermosyphon by difference of densities from induced salinity gradients ...
  • A first study on an oscillatory flow enclosed in a finite cylinder 

    Panadès i Guinart, Carles (Universitat Politècnica de Catalunya, 2009-09-14)
    Master thesis
    Open Access
    In this preliminar work, an oscillatory flow contained in a closed cylinder is investigated by means of spectral methods. The problem is quite related with the Stokes boundary layer and the major phenomena belong to this ...
  • A fluid-structure interaction solver for the fluid flow through reed type valves 

    González Acedo, Ignacio; Naseri, Alireza; Rigola Serrano, Joaquim; Pérez Segarra, Carlos David; Oliva Llena, Asensio (Institute of Physics (IOP), 2017)
    Conference lecture
    Open Access
    Suction and discharge processes with self actuated valves have a major influence in efficiency and reliability of hermetic reciprocating compressors. Understanding the operation completely in order to enhance compressor's ...
  • A level-set method for thermal motion of bubbles and droplets 

    Balcázar Arciniega, Néstor; Oliva Llena, Asensio; Rigola Serrano, Joaquim (Institute of Physics (IOP), 2016)
    Conference report
    Open Access
    A conservative level-set model for direct simulation of two-phase flows with thermocapillary effects at dynamically deformable interface is presented. The Navier-Stokes equations coupled with the energy conservation equation ...
  • 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 low-dissipation convection scheme for the stable discretization of turbulent interfacial flow 

    Schillaci, Eugenio; Jofre Cruanyes, Lluís; Balcázar Arciniega, Néstor; Antepara Zambrano, Óscar; Oliva Llena, Asensio (Elsevier, 2017-08-10)
    Article
    Open Access
    This paper analyzes a low-dissipation discretization for the resolution of immiscible, incompressible multiphase flow by means of interface-capturing schemes. The discretization is built on a three-dimensional, unstructured ...
  • Anàlisi de les estratègies de simulació transitòria de fluxos de metall líquid en condicions de convecció mixta i sota la influència d’un camp magnètic 

    Gómez Artigas, Lucas (Universitat Politècnica de Catalunya, 2019-05-17)
    Master thesis
    Restricted access - author's decision
    El present treball pretén analitzar de manera experimental el comportament de les simulacions transitòries en la resolució de problemes de flux de metall líquid en condicions de convecció mixta i sota la influència d’un ...
  • Análisis del flujo de aire a través de un difusor de automóvil 

    Saban Fosch, Alejandro (Universitat Politècnica de Catalunya, 2018-09-14)
    Bachelor thesis
    Open Access
    The aim of this study was to optimise a car diffuser in order to reduce fuel consumption and improve grip performance in bends, thus achieving a higher cornering speed. The optimisation has been carried out using the ...
  • Análisis de modelos computacionales para la respuesta de tanques afectados por un incendio 

    Andrés Lahoz, David (Universitat Politècnica de Catalunya, 2019-10-23)
    Master thesis
    Open Access
    Análisis de modelos computacionales para el estudio del comportamiento del fluido y del tanque para evaluar situaciones de riesgo que se pueden dar a partir de un incendio.
  • Análisis fluidomecánico de campanas extractoras 

    Santirso Recio, Pablo (Universitat Politècnica de Catalunya, 2014-03)
    Master thesis (pre-Bologna period)
    Restricted access - author's decision
    Este Proyecto de fin de carrera analiza el comportamiento fluidodinámico de una campana extractora de cocina común a través de los siguientes pasos: 1-Estudio experimental de las campanas extractoras más competitivas del ...
  • Analytical prediction of the circumferential pressure distribution in a gear pump 

    Mañé Ramírez, Carles (Universitat Politècnica de Catalunya / Cranfield University, 2017-09)
    Master thesis
    Restricted access - confidentiality agreement
  • An edge-based solver for compressible flow 

    Ortega, Enrique; Flores Le Roux, Roberto Maurice; Oñate Ibáñez de Navarra, Eugenio (2005-10)
    External research report
    Open Access
    An edge-based high-resolution scheme for the solution of the compressible Euler equations on unstructured finite elements grids is presented. The flow solver adopted in the present work is the approximate Riemann solver ...
  • A negative reactivity feedback driven by induced buoyancy after a temperature transient in lead-cooled fast reactors 

    Arias Montenegro, Francisco Javier (2017-10-24)
    Article
    Open Access
    Consideration is given to the possibility to use changes in buoyancy as a negative reactivity feedback mechanism during temperature transients in heavy liquid metal fast reactors (HLMFRs). It is shown that by the proper ...
  • A new subgrid characteristic length for turbulence simulations on anisotropic grids 

    Trias Miquel, Francesc Xavier; Gorobets, Andrei; Silvis, Maurits; Verstappen, Roel; Oliva Llena, Asensio (2017-11-29)
    Article
    Open Access
    Direct numerical simulations of the incompressible Navier-Stokes equations are not feasible yet for most practical turbulent flows. Therefore, dynamically less complex mathematical formulations are necessary for coarse-grained ...
  • A new tool for the practical simulation of fluid-structure interaction problems 

    Cotela Dalmau, Jordi (Universitat Politècnica de Catalunya, 2009-06-23)
    Minor thesis
    Open Access
    La interacció fluid-estructura és un exemple clàssic de problema acoblat resolt mitjançant el mètode d'elements finits. Aquesta tesina l'estudia tant des d'un punt de vista teòric com pràctic. Des del vessant pràctic, es ...