Recent Submissions

  • 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 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 ...
  • A highly portable heterogeneous implementation of a Poisson solver for flows with one periodic direction 

    Alsalti Baldellou, Àdel; Trias Miquel, Francesc Xavier; Álvarez Farré, Xavier; Oliva Llena, Asensio (2021)
    Conference report
    Restricted access - publisher's policy
    The portability of codes has become a major advantage given the continuous development of new architectures for numerical applications, as well as the progressive incorporation of accelerators in modern supercomputers. ...
  • Comparison of Sliding Mesh and Immersed Boundary Methods in Unsteady Simulations 

    Vera i Fernández, Jordi; Muela Castro, Jordi; Favre, Federico; Oliet Casasayas, Carles (2021)
    Conference report
    Restricted access - publisher's policy
    The feasibility and accuracy of two methods for simulating moving bodies inside a fluid are studied. Different cases are presented using the Immersed Boundary Method and the Sliding Mesh technique. The results obtained by ...
  • Electrical Conductivity of Concentrated LiBr Ethylene-Glycol and Water ternary system 

    Zheng, Jian; Bellmunt Chiva, Jorge; Castro González, Jesús; Liu, Yue; Oliva Llena, Asensio (Institute of Physics (IOP), 2021)
    Conference report
    Open Access
    LiBr/H2O as working pair in absorption chiller is widely used in the absorption refrigeration system, and the electrical conductivity is used as secondary properties as an empirical relation with temperature and concentration ...
  • Investigating the capabilities of CFD-based data-driven models for indoor environmental design and control 

    Morozova, Nina; Trias Miquel, Francesc Xavier; Capdevila Paramio, Roser; Oliva Llena, Asensio (International Centre for Numerical Methods in Engineering (CIMNE), 2021)
    Conference report
    Open Access
    In this work, we study the accuracy of CFD-based data-driven models, which predict comfort-related flow parameters in a ventilated cavity with a heated floor. We compare the computational cost and accuracy of three different ...
  • On Preconditioning Variable Poisson Equation with Extreme Contrasts in the Coefficients 

    Alsalti Baldellou, Àdel; Trias Miquel, Francesc Xavier; Gorobets, Andrei; Oliva Llena, Asensio (International Centre for Numerical Methods in Engineering (CIMNE), 2021)
    Conference report
    Open Access
    It is well known that the solution by means of iterative methods of very ill-conditioned systems leads to very poor convergence rates. In this context, preconditioning becomes crucial in order to modify the spectrum of the ...
  • Simulation of fluid-structure interaction and impact force on a reed valve 

    Castrillo Green, Pablo; Schillaci, Eugenio; Rigola Serrano, Joaquim (2021)
    Conference report
    Open Access
    The cyclic impact force between a reed valve and the seat plate is the main reason of the valve failure in many thermo-technical devices as compressors, engines, etc. According to experimental observations the latter is ...
  • Experimental and numerical analysis of reed valve movement in an impact fatigue test system and reciprocating compressors 

    Tofique, Muhammad Waqas; Löf, Alexander; Schillaci, Eugenio; Castrillo Green, Pablo; Rigola Serrano, Joaquim (Purdue University, 2021)
    Conference report
    Restricted access - publisher's policy
    During operation of a reciprocating compressor, its flapper valve opens to allow the passage of gases and closes by striking against the valve impact plate. This reed valve movement and impact is repeated billions of times. ...

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