Enviaments recents

  • 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
    Accés restringit per política de l'editorial
    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 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
    Accés restringit per política de l'editorial
    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 ...
  • Large eddy simulation of a turbulent diffusion flame: some aspects of subgrid modelling consistency 

    Ventosa Molina, Jordi; Lehmkuhl, Oriol; Pérez Segarra, Carlos David; Oliva Llena, Asensio (2017-04-26)
    Article
    Accés restringit per política de l'editorial
    In the context of Large Eddy Simulation (LES) solely for the momentum transport equation there may be found several models for the turbulent subgrid fluxes. Furthermore, among those relying on the eddy diffusivity approach, ...
  • DNS and regularization modeling of a turbulent differentially heated cavity of aspect ratio 5 

    Trias Miquel, Francesc Xavier; Gorobets, Andrei; Oliva Llena, Asensio; Pérez Segarra, Carlos David (2013-01-15)
    Article
    Accés obert
    This work is devoted to the study of turbulent natural convection flows in differentially heated cavities. The adopted configuration corresponds to an airfilled (Pr = 0.7) cavity of aspect ratio 5 and Rayleigh number Ra ...
  • Three dimensionality in the wake of the flow around a circular cylinder at Reynolds number 5000 

    Aljure Osorio, David E.; Lehmkuhl, Oriol; Rodríguez Pérez, Ivette María; Oliva Llena, Asensio (Elsevier, 2017-04-02)
    Article
    Accés restringit per política de l'editorial
    The turbulent flow around a circular cylinder has been investigated at Re=5000Re=5000 using direct numerical simulations. Low frequency behavior, vortex undulation, vortex splitting, vortex dislocations and three dimensional ...
  • 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
    Accés restringit per política de l'editorial
    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 ...
  • Simulation of the two-fluid model on incompressible flow with Fractional Step method for both resolved and unresolved scale interfaces 

    Hou, Xiaofei; Rigola Serrano, Joaquim; Lehmkuhl Barba, Oriol; Oliva Llena, Asensio (2015-04)
    Article
    Accés obert
    In the present paper, the Fractional Step method usually used in single fluid flow is here extended and applied for the two-fluid model resolution using the finite volume discretization. The use of a projection method ...
  • On the evolution of flow topology in turbulent Rayleigh-Bénard convection 

    Dabbagh, Firas; Trias Miquel, Francesc Xavier; Gorobets, Andrei; Oliva Llena, Asensio (2016-11-22)
    Article
    Accés obert
    Small-scale dynamics is the spirit of turbulence physics. It implicates many attributes of flow topology evolution, coherent structures, hairpin vorticity dynamics, and mechanism of the kinetic energy cascade. In this work, ...
  • On the properties of discrete spatial filters for CFD 

    Baez Vidal, Aleix; Lehmkuhl Barba, Oriol; Trias Miquel, Francesc Xavier; Pérez Segarra, Carlos David (2016-12-01)
    Article
    Accés restringit per política de l'editorial
    The spatial filtering of variables in the context of Computational Fluid Dynamics (CFD) is a common practice. Most of the discrete filters used in CFD simulations are locally accurate models of continuous operators. However, ...
  • 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
    Accés restringit per política de l'editorial
    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 ...

Mostra'n més