Doctorat en Enginyeria Tèrmica

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  • Study of the conservation properties in two-way coupled dispersed multiphase flows using finite volume methods 

    Bahramian, Linda; Muela Castro, Jordi; Pérez Segarra, Carlos David (Institute of Physics (IOP), 2021)
    Conference lecture
    Open Access
    In order to simulate dispersed multiphase flows, the coupling level must be determined according to the volume fraction in the system. The volume fraction is the ratio of the total volume of the dispersed phases over the ...

  • High-order finite volume method for linear elasticity on unstructured meshes 

    Castrillo Green, Pablo; Canelas, Alfredo; Schillaci, Eugenio; Rigola Serrano, Joaquim; Oliva Llena, Asensio (2022-08-01)
    Article
    Restricted access - publisher's policy
    This paper presents a high-order finite volume method for solving linear elasticity problems on two-dimensional unstructured meshes. The method is designed to increase the effectiveness of finite volume methods in solving ...

  • Numerical Investigation on fluid flow of protruding branching duct in a dividing junction of a minichannel heat exchanger 

    Settati, Mohamed; Oliet Casasayas, Carles; Oliva Llena, Asensio (2021)
    Conference report
    Open Access
    This study focuses on investigating the effect of protruding branching duct on laminar fluid field in 90¿ dividing pipe junction of mini heat exchanger. The ducts under study, main and branch side, are of minichannel scale ...

  • On a Proper Tensorial Subgrid Heat Flux Model 

    Trias Miquel, Francesc Xavier; Dabbagh, Firas; Santos Serrano, Daniel; Gorobets, Andrei; Oliva Llena, Asensio (2021)
    Conference report
    Open Access
    In this work, we aim to shed light to the following research question: can we find a nonlinear tensorial subgrid-scale (SGS) heat flux model with good physical and numerical properties, such that we can obtain satisfactory ...

  • Proper SGS heat flux models and numerical methods for LES 

    Trias Miquel, Francesc Xavier; Santos Serrano, Daniel; Dabbagh, Firas; Gorobets, Andrei; Oliva Llena, Asensio (2021)
    Conference report
    Restricted access - publisher's policy
    In this work, we aim to shed light to the following research question: can we find a nonlinear tensorial subgrid-scale (SGS) heat flux model with good physical and numerical properties, such that we can obtain satisfactory ...

  • 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 ...

  • 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. ...

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