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  • Quantifying the checkerboard problem to reduce numerical dissipation 

    Hopman, Johannes Arend; Santos Serrano, Daniel; Alsalti Baldellou, Àdel; Rigola Serrano, Joaquim; Trias Miquel, Francesc Xavier (2025-01-15)
    Article
    Restricted access - publisher's policy
    This work provides a comprehensive exploration of various methods in solving incompressible flows using a projection method, and their relation to the occurrence and management of checkerboard oscillations. It employs an ...

  • Parametric study for a structured thermal energy storage system for concentrated solar power plants 

    Sanmartí Perona, Oriol; Vera i Fernández, Jordi; Torras Ortiz, Santiago; Pérez Segarra, Carlos David (Elsevier, 2024-10-01)
    Article
    Restricted access - publisher's policy
    The objective of this paper is to study and optimise thermal energy storage systems of structured thermocline type. The system consists of a solid filler material made from waste ceramic products and a set of channels ...

  • Thermal and fluid dynamic optimization of a CPV-T receiver for solar co-generation applications: numerical modelling and experimental validation 

    Santos Serrano, Daniel; Azgin, Ahmet; Castro González, Jesús; Kizildag, Deniz; Rigola Serrano, Joaquim; Tunçel, Bilge; Turan, Rasit; Preßmair, Rupert; Felsberger, Richard; Buchroithne, Armin (Elsevier, 2023-07)
    Article
    Open Access
    Solar co-generation, i.e., the generation of electricity and heat in a single device by concentrating the sunbeams, has the potential to significantly increase the overall system performance. The main challenge is related ...

  • Exploiting spatial symmetries for solving Poisson's equation 

    Alsalti Baldellou, Àdel; Álvarez Farré, Xavier; Trias Miquel, Francesc Xavier; Oliva Llena, Asensio (Elsevier, 2023-08-01)
    Article
    Open Access
    This paper presents a strategy to accelerate virtually any Poisson solver by taking advantage of s spatial reflection symmetries. More precisely, we have proved the existence of an inexpensive block diagonalisation that ...

  • Two-phase turbulent kinetic energy budget computation in co-current Taylor bubble flow 

    Frederix, E.M.A.; Tajfirooz, S; Hopman, Johannes Arend; Fang, Jun; Merzari, Elia; Komen, E.M.J. (Taylor & Francis Group, 2023-02-13)
    Article
    Open Access
    Simulation of two-phase flows is relevant for reactor design and safety at normal operation or during accident scenarios. Often, the two-phase flow is in a regime in which slugs are formed or where the flow stratifies. ...

  • 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
    Open Access
    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 ...

  • 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
    Open Access
    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 ...

  • 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 ...

  • A symmetry-preserving second-order time-accurate PISO-based method 

    Komen, E.M.J.; Hopman, Johannes Arend; Frederix, E.M.A.; Trias Miquel, Francesc Xavier; Verstappen, Roel W.C.P. (Elsevier, 2021-07-15)
    Article
    Open Access
    A new conservative symmetry-preserving second-order time-accurate PISO-based pressure-velocity coupling for solving the incompressible Navier-Stokes equations on unstructured collocated grids is presented in this paper. ...

  • Development of a reduced order model of solar heat gains prediction 

    Tamm, Meril; Macià, Jordi; Capdevila Paramio, Roser; Farnós Baulenas, Joan; Thalfeldt, Martin; Kurnitski, Jarek (2020-12-01)
    Article
    Open Access
    The aim of this study was to elaborate and validate a reduced order model able to forecast solar heat gains as a function of the architectural parameters that determine the solar heat gains. The study focused on office ...

  • A comprehensive simulation tool for adsorption-based solar-cooled buildings. Control strategy based on variable cycle duration 

    Papakokkinos, Giorgos; Castro González, Jesús; Capdevila Paramio, Roser; Damble, Rashmin (2021-01-15)
    Article
    Open Access
    Adsorption cooling systems (ACS) may contribute towards a sustainable way of satisfying the increasing cooling demand, as they utilize solar thermal energy and employ non-ozone-depleting substances. Apart from the intrinsic ...

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