Enviaments recents

  • Recent developments in the design of a new air-cooled, hot-water-driven H2O-LiBr absorption chiller 

    Castro González, Jesús; Oliva Llena, Asensio; Pérez Segarra, Carlos David; Oliet Casasayas, Carles (ASHRAE, 2008)
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    Accés restringit per política de l'editorial
    This paper explains the up-to-date stage of development of an air-cooled H2O-LiBr absorption chiller. The methodology of development is based on the systematic application of advanced numerical and experimental techniques, ...
  • Exa, zetta, yotta and beyond: on the evolution of Poisson solvers 

    Trias Miquel, Francesc Xavier; Alsalti Baldellou, Àdel; Oliva Llena, Asensio (Parallel Computational Fluid Dynamics (ParCFD), 2023)
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    In this work, we aim to shed light to the following research question: is the complexity of numerically solving Poisson’s equation increasing or decreasing for very large DNS and LES simulations of incompressible flows? ...
  • Low-rank corrections for increasing the arithmetic intensity of the preconditioners 

    Alsalti Baldellou, Àdel; Janna, Carlo; Álvarez Farré, Xavier; Trias Miquel, Francesc Xavier (Parallel Computational Fluid Dynamics (ParCFD), 2023)
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    Spatial reflection symmetries are common in many academic and industrial CFD configurations. Given a mesh with s symmetries, it is possible to transform Poisson’s equation into a set of 2^s fully-decoupled subsystems. By ...
  • Assessment of LES models for a fully developed windturbine array boundary layer 

    Folch Flórez, David; Trias Miquel, Francesc Xavier; Oliva Llena, Asensio (Begell House, 2023)
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    Direct numerical simulations of the incompressible Navier-Stokes equations at high Reynolds numbers are not yet feasible, so dynamically less complex mathematical formulations such as Large Eddy Simulation (LES) have been ...
  • Strategies for increasing the arithmetic intensity on ensemble averaged parallel-in-time simulations 

    Plana Riu, Josep; Trias Miquel, Francesc Xavier; Alsalti Baldellou, Àdel; Oliva Llena, Asensio (Parallel Computational Fluid Dynamics (ParCFD), 2023)
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    Extracting flow statistics from flow simulations requires generally long in- tegration intervals in which a good deal of the time is spent time-averaging the results. In order to avoid this, ensemble averaging can be applied ...
  • A coupled LSVOF-adaptive mesh refinement-moving mesh technique to study complex multiphase problems 

    Amani, Ahmad; Pérez Segarra, Carlos David; Oliva Llena, Asensio (Begell House, 2023)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    The Piecewise-Linear-Interface-Calculation (PLIC) reconstruction algorithm in the Volume-of-Fluid (VOF) method is widely used in numerical simulations of interfacial flows across various fields. However, a significant ...
  • Unstructured Conservative Level-Set (UCLS) method for mass transfer in bubble swarms with high physical properties ratios 

    Balcázar Arciniega, Néstor; Rigola Serrano, Joaquim; Oliva Llena, Asensio (Begell House, 2024)
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    This work introduces a parallel Unstructured Conservative Level-Set (UCLS) method for reactive mass transfer in two-phase flows with a high-density ratio. The proposed method employs the multiple-marker approach to circumvent ...
  • Combustion and air flows simulations of an industrial kiln for sanitary ware manufacture 

    Liu, Jiannan; Ruano Pérez, Jesús; Schillaci, Eugenio; Rigola Serrano, Joaquim; Pérez Segarra, Carlos David (Begell House, 2023)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    The implementation of green hydrogen as fuel in industrial kilns, such as those required in ceramic ware manufacturing processes, would be a disruptive milestone in the decarbonization process of the energyintensive industry. ...
  • Reliable overnight industrial LES: challenges and limitations. Application to CSP technologies 

    Alsalti Baldellou, Àdel; Colomer Rey, Guillem; Hopman, Johannes Arend; Álvarez Farré, Xavier; Gorobets, Andrei; Trias Miquel, Francesc Xavier; Pérez Segarra, Carlos David; Oliva Llena, Asensio (European Research Community on Flow, Turbulence, and Conbustion (ERCOFTAC), 2023)
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    Preserving the operators’ symmetries at the discrete level is crucial to enable reliable DNS and LES simulations of turbulent flows. Moreover, real-world applications demand robust and stable numerical methods suitable for ...
  • On the evolution of Poisson solvers for extreme scale simulations 

    Alsalti Baldellou, Àdel; Trias Miquel, Francesc Xavier; Oliva Llena, Asensio (Begell House, 2023)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    In this work, we aim to shed light to the following research question: is the complexity of numerically solving Poisson’s equation increasing or decreasing for very large DNS and LES simulations of incompressible flows? ...
  • On a conservative solution to checkerboarding: examining the causes of non-physical pressure modes 

    Hopman, Johannes Arend; Alsalti Baldellou, Àdel; Trias Miquel, Francesc Xavier; Oliva Llena, Asensio (European Research Community on Flow, Turbulence, and Conbustion (ERCOFTAC), 2023)
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    Accés obert
    In computational fluid dynamics (CFD), the checkerboard problem remains a challenging issue when employing collocated grid arrangements for complex geometries. It manifests as oscillatory and non-physical pressure modes, ...
  • On a high-order energy-preserving unconditionally stable discretization on collocated unstructured grids 

    Santos Serrano, Daniel; Trias Miquel, Francesc Xavier; Verstappen, R.W.C.P.; Pérez Segarra, Carlos David (European Research Community on Flow, Turbulence, and Conbustion (ERCOFTAC), 2023)
    Text en actes de congrés
    Accés obert
    In this work, an energy-preserving unconditionally stable fractional step method on collocated unstructured grids is presented. Its formulation is based on preserving the underlying symmetries of the differential operators. ...

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