Now showing items 1-20 of 215

  • 3D numerical models using a fluid or a solid formulation of FSW processes with a non-cylindrical pin 

    Bussetta, Philippe; Dialamishabankareh, Narges; Chiumenti, Michèle; Agelet de Saracibar Bosch, Carlos; Cervera Ruiz, Miguel; Boman, Romain; Ponthot, Jean Philippe (Springer, 2015-12)
    Article
    Open Access
    Friction Stir Welding (FSW) process is a relatively recent welding process (patented in 1991). FSW is a solid-state joining process during which materials to be joined are not melted. During the FSW process, the behaviour ...
  • 3D numerical simulation of a jet engine axial compression stage 

    Coma Calle, Ferran (Universitat Politècnica de Catalunya, 2015-09-14)
    Bachelor thesis
    Open Access
    The aim of this work is to undertake three-dimensional simulation of a compression stage of a jet engine axial compressor in order to study the air flow, assess blade performance at various working conditions, and validate ...
  • A 3D low-order panel method for unsteady aerodynamic problems 

    Ortega, Enrique; Flores Le Roux, Roberto Maurice; Oñate Ibáñez de Navarra, Eugenio (2010)
    External research report
    Open Access
    An unsteady low-order panel method for three-dimensional subsonic analyses is presented. The method, which is based on well-established techniques in computational aerodynamics, is intended to achieve a cost-effective ...
  • A 3-D volume-of-fluid advection method based on cell-vertex velocities for unstructured meshes 

    Jofre Cruanyes, Lluís; Lehmkuhl Barba, Oriol; Castro González, Jesús; Oliva Llena, Asensio (Elsevier, 2014-05-01)
    Article
    Restricted access - publisher's policy
    A new geometrical Volume-of-Fluid (VOF) method for capturing interfaces on three-dimensional (3-D) Cartesian and unstructured meshes is introduced. The method reconstructs interfaces as first- and second-order piecewise ...
  • AAR-based decomposition method for limit analysis 

    Rabiei, Nima; Muñoz Romero, José (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2014)
    Conference lecture
    Open Access
  • Advances in the simulation of multi-fluid flows with the Particle Finite Element Method: application to bubble dynamics 

    Idelsohn Barg, Sergio Rodolfo; Oñate Ibáñez de Navarra, Eugenio (2010)
    External research report
    Open Access
    In this work we extend the Particle Finite Element Method (PFEM) to multi-fluid flow problems with the aim of exploiting the fact that Lagrangian methods are specially well suited for tracking interfaces. We develop a ...
  • La aerodinámica del fórmula World Series y mejora de la eficiencia del ala delantera 

    Sanchez Folch, Nicolau (Universitat Politècnica de Catalunya, 2016-01)
    Bachelor thesis
    Open Access
    Este documento contiene el análisis de un perfil alar concreto del “flap” de un alerón delantero de un monoplaza de competición, World Series by Renault. Este es un perfil propio de Dallara, empresa que provee a dicha ...
  • Aerodynamic performance of a paraglider wing 

    Moreno Colilles, Joan Marc (Universitat Politècnica de Catalunya, 2017-10-30)
    Bachelor thesis
    Open Access
    The aim of this project is to carry out an aerodynamic performance analysis of a paraglider by using simulation computational programs with low time cost and computational requirements, but still effective approach obtaining ...
  • A finite-volume/level-set interface capturing method for unstructured grids: Simulations of bubbles rising through viscous liquids 

    Balcázar Arciniega, Néstor; Jofre Cruanyes, Lluís; Lehmkuhl Barba, Oriol; Rigola Serrano, Joaquim; Castro González, Jesús; Oliva Llena, Asensio (WIT Press, 2014)
    Conference report
    Open Access
    A numerical method is developed for simulating two-phase flows with moving inter-phase boundaries, which is integrated in a finite-volume framework on collocated unstructured grids of arbitrary element type. The location, ...
  • Air recovery assessment on high-pressure pneumatic systems 

    Trujillo, J. A.; Gámez Montero, Pedro Javier; Codina Macià, Esteban (2016-05-23)
    Article
    Open Access
    A computational simulation and experimental work of the fluid flow through the pneumatic circuit used in a stretch blow moulding machine is presented in this paper. The computer code is built around a zero-dimensional ...
  • ALBA cooling system 1D model and thermo-fluid dynamic simulations using Flowmaster® software 

    Escaler Puigoriol, Francesc Xavier (2014-04-30)
    External research report
    Restricted access - confidentiality agreement
    The Center for Industrial Diagnostics and Fluid Dynamics (CDIF) is a R&D center within the Technical University of Catalonia (UPC). It belongs to the TECNIO network, a technology transfer initiative from ACC10, the Technology ...
  • A level-set aided single-phase model for the numerical simulation of free-surface flow on unstructured meshes 

    Schillaci, Eugenio; Jofre Cruanyes, Lluís; Balcázar Arciniega, Néstor; Lehmkuhl, Oriol; Oliva Llena, Asensio (Elsevier, 2016-11-25)
    Article
    Open Access
    A new single-phase scheme for the numerical simulation of free-surface problems on 3-D unstructured meshes is presented. The flow field is obtained from the discrete solution of the incompressible Navier-Stokes equations, ...
  • A mechanism for streamwise localisation of nonlinear waves in shear flows 

    Mellibovsky Elstein, Fernando; Meseguer Serrano, Álvaro (2015-09-01)
    Article
    Open Access
    We present the complete unfolding of streamwise localisation in a paradigm of extended shear flows, namely two-dimensional plane Poiseuille flow. Exact solutions of the Navier-Stokes equations are computed numerically and ...
  • Anàlisi aerodinàmica d’una pilota de futbol 

    Palacios Corral, Alejandro (Universitat Politècnica de Catalunya, 2018-01-18)
    Bachelor thesis
    Open Access
    De quina manera es poden combinar ciència i esport per acabar donant un bon resultat? Hi ha algun tipus de fórmula matemàtica que doni amb la tecla adequada i permeti automatitzar la pràctica esportiva? De ben segur que, ...
  • Anàlisi fluidodinàmic i modelització d'un drone de combustió interna 

    Pallàs Domingo, Xavier (Universitat Politècnica de Catalunya, 2015-04)
    Master thesis (pre-Bologna period)
    Restricted access - author's decision
    L'objectiu d'aquest projecte és analitzar si és viable construir un drone amb motor d'explosi ó desde el punt de vista fluidomecànic, i fer el model matemàtic del drone, per poder fer el control d'aquest en un futur. El ...
  • 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 numérico de las funciones corriente circulación y vorticidad, para flujo rotatorio con frontera rígida 

    Lizardi Ramos, A.; López C., R.; Morales G., J.R.; Terrés P., H.; Lara V., A. (Universitat Politècnica de Catalunya. CIMNE, 2010)
    Article
    Open Access
    En este trabajo se obtienen y analizan los campos de las funciones vorticidad tangencial, circulación y corriente meridional, que se generan en el interior de un cilindro cerrado que tiene el fondo giratorio y la tapa ...
  • 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 ...
  • An empirical methodology for prediction of shape and flow rate of a free-falling non-submerged liquid and casting iron stream 

    Gámez Montero, Pedro Javier; Castilla López, Roberto; Freire Venegas, Francisco Javier; Khamashta Llorens, Maria; Codina Macià, Esteban (2016-09-19)
    Article
    Open Access
    The work presented in this article demonstrates the use of an empirical and simplified approach based on an optical technique and a home-made ad hoc code that give knowledge of the shape and falling velocity of a free-falling ...
  • An implicit finite-element model for 3D non-hydrostatic mesoscale ocean flows 

    Maidana, Manuel Augusto; Blasco Lorente, Jorge; Espino Infantes, Manuel (2004)
    Article
    Open Access
    We present in this paper a pressure stabilized, finite element method for the numerical approximation of three-dimensional, non-hydrostatic mesoscale ocean flows. The model considered here incorporates surface wind ...