Doctorat en Enginyeria Tèrmica

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  • Assessment of LES techniques for mitigating the Grey Area in DDES models 

    Pont Vilchez, Arnau; Santos Serrano, Daniel; Trias Miquel, Francesc Xavier; Duben, Alexey; Revell, Alistair; Oliva Llena, Asensio (2019)
    Conference report
    Open Access
    The slow RANS-LES transition is a well-known shortcoming in hybrid turbulence models such as DelayedDetached Eddy Simulation (DDES). The present work assesses the feasibility of 2D sensitive LES models for naturally ...

  • Improving DES capabilities for predicting Kelvin-Helmholtz instabilities. Comparison with a backward-facing step DNS. 

    Pont Vilchez, Arnau; Trias Miquel, Francesc Xavier; Duben, Alexey; Revell, Alistair; Oliva Llena, Asensio (2020-05-10)
    Conference report
    Restricted access - publisher's policy
    The Detached Eddy Simulation (DES) turbulence model presented by Spalart et al. (Comments on the Feasibility of LES for Wings, and on a Hybrid RANS/LES Approach, [1]) in the late 90s, was specifically designed to simulate ...

  • On the Feasibility of CFD for Transient Air Flow Simulations in Buildings 

    Morozova, Nina; Capdevila Paramio, Roser; Trias Miquel, Francesc Xavier; Oliva Llena, Asensio (2019)
    Conference report
    Restricted access - publisher's policy
    The rapidly growing computational capacity hasmade CFD simulations an attractive tool for indoorenvironmental applications. The ability of CFD toperform transient simulations could be incorporatedinto model predictive ...

  • A numerical approach for non-Newtonian two-phase flows using a conservative level-set method 

    Amani, Ahmad; Balcázar Arciniega, Néstor; Naseri, Alireza; Rigola Serrano, Joaquim (2020-04-01)
    Article
    Restricted access - publisher's policy
    A finite-volume based conservative level-set method is presented to numerically solve the non-Newtonian multiphase flow problems. One set of governing equations is written for the whole domain, and different phases are ...

  • Development of Innovative Heat Sinks for Power Electronics Cooling within the More Electrical Aircraft 

    Oliet Casasayas, Carles; Naseri, Alireza; Rigola Serrano, Joaquim; Oliva Llena, Asensio; Mullen, David; McKay, Connor; Hoell, Klaus; Preishuber-Pfluegl, Florian; Migneau, Maxime (European Conference for AeroSpace Sciences (EUCASS), 2019)
    Conference report
    Open Access

  • DNS of drag-force and reactive mass transfer in gravity-driven bubbly flows 

    Balcázar Arciniega, Néstor; Antepara Zambrano, Óscar; Rigola Serrano, Joaquim; Oliva Llena, Asensio (2019)
    Conference report
    Restricted access - publisher's policy

  • A pure virtual approach for managing platform portability on hybrid supercomputers 

    Álvarez Farré, Xavier; Gorobets, Andrey; Alsati Baldellou, Àdel; Trias Miquel, Francesc Xavier (2019)
    Conference report
    Restricted access - publisher's policy
    Commonly, the development of scientific computing software follows a stencilbased approach: the numerical methods and algorithms are introduced into computing systems through stencil data structures and sweeps (i.e. ...

  • Detailed prediction of fluid-solid coupled phenomena of turbulent flow through reed valves 

    González Acedo, Ignacio; Naseri, Alireza; Rigola Serrano, Joaquim; Pérez Segarra, Carlos David; Oliva Llena, Asensio (Institute of Physics (IOP), 2019)
    Conference report
    Open Access
    The operation of self-actuated valves in suction and discharge processes plays a crucial role in the thermal efficiency and structural reliability of hermetic reciprocating compressors. The present work provides a thorough ...

  • Assessment and comparison of a recent kinematic sensitive subgrid length scale in Hybrid RANS-LES 

    Pont Vilchez, Arnau; Trias Miquel, Francesc Xavier; Revell, Alistair; Oliva Llena, Asensio (Springer Nature, 2020)
    Conference report
    Restricted access - publisher's policy
    A recent kinematic sensitive subgrid length scale, Δlsq, initially developed for LES applications, is now considered for DES. Even though it is presented as a subgrid length scale, instead of a grey area mitigation (GAM) ...

  • Numerical study of droplet deformation in shear flow using a conservative level-set method 

    Amani, Ahmad; Balcázar Arciniega, Néstor; Castro González, Jesús; Oliva Llena, Asensio (2019-11-02)
    Article
    Restricted access - publisher's policy
    This paper is concerned with a numerical study on the behavior of a single Newtonian droplet suspended in another Newtonian fluid, all subjected to a simple shear flow. Conservative finite-volume approximation on a collocated ...

  • An energy-preserving level set method for multiphase flows 

    Valle Marchante, Nicolás; Trias Miquel, Francesc Xavier; Castro González, Jesús (2020-01-01)
    Article
    Restricted access - publisher's policy
    The computation of multiphase flows presents a subtle energetic equilibrium between potential (i.e., surface) and kinetic energies. The use of traditional interface-capturing schemes provides no control over such a dynamic ...

  • A level-set model for mass transfer in bubbly flows 

    Balcázar Arciniega, Néstor; Antepara Zambrano, Óscar; Rigola Serrano, Joaquim; Oliva Llena, Asensio (2019-08-01)
    Article
    Restricted access - publisher's policy
    A level-set model is presented for simulating mass transfer or heat transfer in two-phase flows. The Navier-Stokes equations and mass transfer (or heat transfer) equation are discretized using a finite volume method on a ...

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