Enviaments recents

  • 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 ...
  • Drain water heat recovery storage-type unit for residential housing 

    Torras Ortiz, Santiago; Oliet Casasayas, Carles; Rigola Serrano, Joaquim; Oliva Llena, Asensio (2016-06-25)
    Article
    Accés restringit per política de l'editorial
    The drain water heat recovery (DWHR) system is an interesting household technology to reduce energy costs and environmental impact. The objective of the utilisation of these devices is the recovery of the waste heat from ...
  • 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
    Accés restringit per política de l'editorial
    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 ...
  • Analysis and design of a drain water heat recovery storage unit based on PCM plates 

    Morales-Ruiz, S; Rigola Serrano, Joaquim; Oliet Casasayas, Carles; Oliva Llena, Asensio (2016-10-01)
    Article
    Accés restringit per política de l'editorial
    This paper is focused on the detailed analysis of a PCM plate heat storage unit with a particular configuration, looking for the maximum contact area with the fluid (water) and the minimum volume to be used in a real ...
  • Thermo-mechanical parametric analysis of packed-bed thermocline energy storage tanks 

    Ferreira González, Ignacio; Pérez Segarra, Carlos David; Lehmkuhl, Oriol; Torras, Santiago; Oliva Llena, Asensio (2016-10-01)
    Article
    Accés restringit per política de l'editorial
    A packed-bed thermocline tank represents a proved cheaper thermal energy storage for concentrated solar power plants compared with the commonly-built two-tank system. However, its implementation has been stopped mainly due ...
  • Numerical analysis of conservative unstructured discretisations for low Mach flows 

    Ventosa Molina, Jordi; Chiva Segura, Jorge; Lehmkuhl, Oriol; Muela Castro, Jordi; Pérez Segarra, Carlos David; Oliva Llena, Asensio (2016-12-01)
    Article
    Accés restringit per política de l'editorial
    Unstructured meshes allow easily representing complex geometries and to refine in regions of interest without adding control volumes in unnecessary regions. However, numerical schemes used on unstructured grids have to ...

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