Now showing items 1-20 of 244

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

      Bussetta, Philippe; Dialamishabankareh, Narges; Chiumenti, Michele; 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 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 ...
    • 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 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, ...
    • 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 ...
    • A numerical method for computing unstable quasi-periodic solutions for the 2-D Poiseuille flow 

      Sánchez Casas, José Pablo; Jorba, Angel (1999)
      Article
      Open Access
    • A power flow analysis of a double-deck circular tunnel embedded in a full-space 

      Clot Razquin, Arnau; Romeu Garbí, Jordi; Arcos Villamarín, Robert; Martín Román, Sara-Regina (2014-02)
      Article
      Restricted access - publisher's policy
      The purpose of the present investigation is to obtain the mean power flow radiated by a double-deck circular tunnel and compares it to the one radiated by a simple circular tunnel. To achieve this, a harmonic line load is ...
    • A second-order semi-lagrangian particle finite element method for fluid flows 

      Colom Cobb, J.; García Espinosa, Julio; Serván Camas, Borja; Nadukandi, Prashanth (Springer, 2019-01-01)
      Article
      Open Access
      In this paper, a second-order SL-PFEM scheme for solving the incompressible Navier–Stokes equations is presented. This scheme is based on the second-order velocity Verlet algorithm, which uses an explicit integration for ...
    • A theoretical and experimental study of horizontal air-water two-phase flow with a spool piece 

      Zegrí Reiriz, Jocobo (Universitat Politècnica de Catalunya / Politecnico di Torino, 2010)
      Master thesis (pre-Bologna period)
      Open Access
      Desarrollo de instrumentación especializada y desarrollo de algoritmos especiales capaces de interpertar las señales de medida del flujo bifásico. Combinaciones de diferentes instrumentos (Spool Piece) serán analizados y ...
    • A theoretical and experimental study of horizontal air-water. Two-phase flow with a spool piece 

      Mora Vallejo, Luis (Universitat Politècnica de Catalunya / Politecnico di Torino, 2010)
      Master thesis (pre-Bologna period)
      Open Access
      This Master Thesis has been carried out by Luis Mora Vallejo and Jacobo Zegrí Reiriz. We are both two Spanish students who are studying Engineering in the Universitat Politècnica de Catalunya (UPC) in the engineer‟s school ...
    • A two-step monolithic method for the efficient simulation of incompressible flows 

      Ryzhakov, Pavel; Cotela Dalmau, Jordi; Rossi, Riccardo; Oñate Ibáñez de Navarra, Eugenio (2014-01)
      Article
      Restricted access - publisher's policy
      We propose a simple technique for improving computationally the efficiency of monolithic velocity–pressure solvers for incompressible flow problems. The idea consists in solving the discrete nonlinear system of governing ...
    • 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
    • Adaptive finite element computations of hypersonic inviscid flows around a doubel ellipsoid 

      Fischer, Thomas B.; Oñate Ibáñez de Navarra, Eugenio (1995)
      External research report
      Open Access
      This report documents the potential capabilities of adaptive inviscid flow calculations on unstructured meshes in three dimensions using the finite element method. The finite element formulation of the compressible Euler ...
    • Advances in the simulation of multi-fluid flows with the Particle Finite Element Method: application to bubble dynamics 

      Mier-Torrecilla, Mónica de; 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 ...
    • 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 ...