Departament de Màquines i Motors Tèrmics

Recent Submissions

  • A CFD-based surrogate model for predicting flow parameters in a ventilated room using sensor readings 

    Morozova, Nina; Trias Miquel, Francesc Xavier; Capdevila Paramio, Roser; Schillaci, Eugenio; Oliva Llena, Asensio (2022-07-01)
    Article
    Restricted access - publisher's policy
    In this work, we develop a computational fluid dynamics (CFD)-based surrogate model, which predicts flow parameters under different geometrical configurations and boundary conditions in a benchmark case of a mechanically ...

  • Coupled radiation and natural convection: Different approaches of the slw model for a non-gray gas mixture 

    Colomer Rey, Guillem; Consul Serracanta, Ricard; Oliva Llena, Asensio (2007-09)
    Article
    Open Access
    The coupling between non-gray radiation heat transfer and convection–conduction heat transfer is studied. The spectral line weighted sum of gray gases model (SLW) is used to account for non-gray radiation properties. The ...

  • DNS of mass transfer in turbulent bubbly flow in a vertical pipe 

    Balcázar Arciniega, Néstor; Rigola Serrano, Joaquim; Oliva Llena, Asensio (2021)
    Conference report
    Restricted access - publisher's policy
    The present research focuses on the DNS of mass transfer in gravity-driven turbulent bubbly flow in a vertical pipe, at a high Reynolds number (Re approximates to 1000). The objective is to compute the mass transfer ...

  • Transient Thermal Management of Vapor Cycles to Simulate Aircraft Electrical Environment Control Systems 

    Ablanque Mejía, Nicolás; Torras Ortiz, Santiago; Oliet Casasayas, Carles; Rigola Serrano, Joaquim; Pérez Segarra, Carlos David (International Institute of Refrigeration, 2019)
    Conference lecture
    Restricted access - publisher's policy
    A Modelica library has been developed to simulate both transient and steady state of vapor cycle systems (VCS) integrated within Electrical Environment Control Systems (E-ECS) architectures applied in the thermal management ...

  • Advanced techniques for grau area mitigation in DES simulations and their effectes on the subsonic round jet acoustic spectra 

    Duben, Alexey; Ruano Pérez, Jesús; Trias Miquel, Francesc Xavier; Rigola Serrano, Joaquim (2021)
    Conference report
    Restricted access - publisher's policy
    The research dedicated to the investigation of different gray-area mitigation approaches towards accurate aerodynamics and aeroacoustics is presented. The recent modifications of hybrid RANS-LES DDES approach based on ...

  • NUMA-Aware Strategies for the Heterogeneous Execution of SPMV on Modern Supercomputers 

    Álvarez Farré, Xavier; Gorobets, Andrei; Trias Miquel, Francesc Xavier; Oliva Llena, Asensio (2021)
    Conference report
    Open Access
    The sparse matrix-vector product is a widespread operation amongst the scientific computing community. It represents the dominant computational cost in many large-scale simulations relying on iterative methods, and its ...

  • A General Method to Compute Numerical Dispersion Error 

    Ruano Pérez, Jesús; Baez Vidal, Aleix; Rigola Serrano, Joaquim; Trias Miquel, Francesc Xavier (2021)
    Conference report
    Open Access
    This article presents a new methodology to compute numerical dispersion error. The analysis here presented is not restricted to uniform structured meshes nor linear discrete operators as it does not rely on sinusoids to ...

  • On the implementation of flux limiters in algebraic frameworks 

    Valle Marchante, Nicolás; Álvarez Farré, Xavier; Gorobets, Andrei; Castro González, Jesús; Oliva Llena, Asensio; Trias Miquel, Francesc Xavier (2022-02-01)
    Article
    Open Access
    The use of flux limiters is widespread within the scientific computing community to capture shock dis- continuities and are of paramount importance for the temporal integration of high-speed aerodynamics, multiphase flows ...

  • A new general method to compute dispersion errors on Cartesian stretched meshes for both linear and non-linear operators 

    Ruano Pérez, Jesús; Baez Vidal, Aleix; Rigola Serrano, Joaquim; Trias Miquel, Francesc Xavier (2022-02-01)
    Article
    Restricted access - publisher's policy
    The present article presents a new analysis for the dispersion error and the methodology to evaluate it numerically. Here we present the spectral properties of several convective schemes, including non-linear ones, on ...

  • On the Interpolation Problem for the Poisson Equation on Collocated Meshes 

    Santos Serrano, Daniel; Muela Castro, Jordi; Valle Marchante, Nicolás; Trias Miquel, Francesc Xavier (International Centre for Numerical Methods in Engineering (CIMNE), 2021)
    Conference report
    Open Access
    The appearence of unphysical velocities in highly distorted meshes is a common problem in many simulations. In collocated meshes, this problem arises from the interpolation of the pressure gradient from faces to cells. ...

  • NUMA-Aware strategies for the efficient execution of CFD simulations on CPU supercomputers 

    Álvarez Farré, Xavier; Gorobets, Andrei; Trias Miquel, Francesc Xavier; Oliva Llena, Asensio (2021)
    Conference report
    Restricted access - publisher's policy
    The growing variety of computing architectures and the hybridization of high-performance computing systems encourage the research for portable implementations of numerical methods in simulation codes. However, the pursuit ...

  • Energy and exergy analysis of an absorption system with working pairs LiBr-H2O and Carrol-H2O at applications of cooling and heating 

    Zheng, Jian; Castro González, Jesús; Oliva Llena, Asensio; Oliet Casasayas, Carles (2021-12-01)
    Article
    Restricted access - publisher's policy
    In this work, an air-cooled, single effect solar-driven absorption system is being evaluated from the point of view of 1 and 2 thermodynamic principles for two different applications: absorption chiller and heat pump. One ...

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