Ara es mostren els items 11-30 de 61

    • Direct numerical simulation of a NACA0012 in full stall 

      Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol; Borrell Pol, Ricard; Oliva Llena, Asensio (2013-10-15)
      Article
      Accés obert
      This work aims at investigating the mechanisms of separation and the transition to turbulence in the separated shear-layer of aerodynamic profiles, while at the same time to gain insight into coherent structures formed ...
    • Direct Numerical Simulation of the flow over a sphere at Re = 3700 

      Rodríguez Pérez, Ivette María; Borrell Pol, Ricard; Lehmkuhl Barba, Oriol; Oliva Llena, Asensio; Pérez Segarra, Carlos David (2009)
      Comunicació de congrés
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      The direct numerical simulation of the flow past a sphere at Re=3700 is presented. The computations are carried out with a parallel unstructured symmetry preserving information for accurate solving complex geometries. As ...
    • Direct numerical simulation of the flow over a sphere at Re = 3700 

      Rodríguez Pérez, Ivette María; Borrell Pol, Ricard; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David; Oliva Llena, Asensio (2011-05-19)
      Article
      Accés restringit per política de l'editorial
      The direct numerical simulation of the flow over a sphere is performed. The computations are carried out in the sub-critical regime at Re = 3700 (based on the free-stream velocity and the sphere diameter). A parallel ...
    • Direct numerical simulation of the flow over a spherical bubble in a turbulent pipe flow 

      Jofre Cruanyes, Lluís; Balcázar Arciniega, Néstor; Lehmkuhl Barba, Oriol; Borrell Pol, Ricard; Castro González, Jesús (International Association for Computational Mechanics (IACM), 2014)
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      This work aims at investigating, by means of a direct numerical simulation, the flow over a clean spherical bubble fixed on the axis of a turbulent pipe flow. The simulation is performed by means of a parallel unstructured ...
    • Direct numerical simulation of the turbulent natural convection flow in an open cavity of aspect ratio 4 

      Chiva Segura, Jorge; Lehmkuhl Barba, Oriol; Borrell Pol, Ricard; Oliva Llena, Asensio (Begell House, 2012)
      Text en actes de congrés
      Accés obert
      In this paper, three-dimensional turbulent natural convection heat transfer in an open cavity with an isothermal wall facing the overture has been studied. The aspect ratio chosen for the cavity has been 4 to complement the ...
    • Direct numerical simulation of turbulent flows with parallel algorithms for various computing architectures 

      Gorobets, Andrei; Trias Miquel, Francesc Xavier; Borrell Pol, Ricard; Oyarzun Altamirano, Guillermo; Oliva Llena, Asensio (International Association for Computational Mechanics (IACM), 2014)
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      The purpose of the work is twofold. Firstly, it is devoted to the development of efficient parallel algorithms for large-scale simulations of turbulent flows on different supercomputer architectures. It reports experience ...
    • Direct numerical simulation of turbulent wakes: flow past a sphere at Re=5000 

      Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol; Borrell Pol, Ricard; Oliva Llena, Asensio; Pérez Segarra, Carlos David (2010)
      Text en actes de congrés
      Accés obert
      The flow around bluff bodies is of great interest for a large number of engineering applications such as vehicle aerodynamics, cooling devices using forced convection, heat transfer enhancement using droplets, among ...
    • Direct numerical simulations and symmetry preserving regularization simulations of the flow over a circular cylinder at Reynolds number 3900 

      Lehmkuhl Barba, Oriol; Borrell Pol, Ricard; Pérez Segarra, Carlos David; Chiva Segura, Jorge; Oliva Llena, Asensio (2009-09-14)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      Flow around cylindrical structures is of relevance for many practical applications. Knowledge of flow-related unsteady loading of such structures is crucial for hydro - and aerodynamic control and design. Recenty, the ...
    • Distributed tabulation of flamelet lookup tables 

      Abel, Nicholas; Borrell Pol, Ricard; Mira Martínez, Daniel (Barcelona Supercomputing Center, 2022-05)
      Text en actes de congrés
      Accés obert
      One of the fundamental questions in combustion simulation is how to account for detailed chemistry effects, while controlling both the error of the chemical scheme and the computational cost. Combustion chemistry is ...
    • Dynamic resource allocation for efficient parallel CFD simulations 

      Houzeaux, Guillaume; Badia Sala, Rosa Maria; Borrell Pol, Ricard; Dosimont, Damien; Ejarque Artigas, Jorge; García Gasulla, Dario; López Herrero, Víctor (Elsevier, 2022-09-15)
      Article
      Accés restringit per política de l'editorial
      CFD users of supercomputers usually resort to rule-of-thumb methods to select the number of subdomains (partitions) when relying on MPI-based parallelization. One common approach is to set a minimum number of elements or ...
    • Effect of mesh partition on the scalability of the parallel solution of the radiative transfer equation 

      Colomer Rey, Guillem; Borrell Pol, Ricard; Trias Miquel, Francesc Xavier; Oliva Llena, Asensio (2011)
      Comunicació de congrés
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      The radiative transfer equation is solved in parallel using spatial domain decomposition. The effect of several kinds of mesh partitioning strategies is analyzed in this work. Geometries discretized with both structured ...
    • Effect of the actuation on the boundary layer of an airfoil at moderate reynolds number 

      Lehmkuhl Barba, Oriol; Rodríguez Pérez, Ivette María; Borrell Pol, Ricard (Springer, 2020)
      Text en actes de congrés
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      Synthetic (zero net mass flux) jets are an active flow control technique to manipulate the flow field in wall-bounded and free-shear flows. The fluid necessary to actuate on the boundary layer is intermittently injected ...
    • Effects of the actuation on the boundary layer of an airfoil at Reynolds Number Re = 60000 

      Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol; Borrell Pol, Ricard (Springer-Verlag, 2020-05-29)
      Article
      Accés obert
      Synthetic (zero net mass flux) jets are an active flow control technique to manipulate the flow field in wall-bounded and free-shear flows. The present paper focuses on the role of the periodic actuation mechanisms on the ...
    • Efficiency of large-scale CFD simulations on modern supercomputers using thousands of CPUS and hybrid MPI+OPENMP parallelization 

      Gorobets, Andrei; Borrell Pol, Ricard; Trias Miquel, Francesc Xavier; Kozubskaya, T.K.; Oliva Llena, Asensio (2010)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      This work represents an experience in using the hybrid parallel model to perform large-scale DNS. Advantages of the hybrid approach compared to the MPI-only approach are presented and discussed. The use of OpenMP in addition ...
    • Efficient CFD code implementation for the ARM-based Mont-Blanc architecture 

      Oyarzun Altamirano, Guillermo; Borrell Pol, Ricard; Gorobets, Andrei; Mantovani, Filippo; Oliva Llena, Asensio (Elsevier, 2017-09-20)
      Article
      Accés obert
      Since 2011, the European project Mont-Blanc has been focused on enabling ARM-based technology for HPC, developing both hardware platforms and system software. The latest Mont-Blanc prototypes use system-on-chip (SoC) devices ...
    • Efficient CFD code implementation for the ARM-based Mont-Blanc architecture 

      Oyarzun Altamirano, Guillermo; Borrell Pol, Ricard; Gorobets, Andrei; Mantovani, Filippo; Oliva Llena, Asensio (Elsevier, 2018-02)
      Article
      Accés obert
      Since 2011, the European project Mont-Blanc has been focused on enabling ARM-based technology for HPC, developing both hardware platforms and system software. The latest Mont-Blanc prototypes use system-on-chip (SoC) devices ...
    • ETP4HPC’s SRA 5 strategic research agenda for High-Performance Computing in Europe 2022: European HPC research priorities 2023-2027 

      Carpenter, Paul Matthew; Casas, Marc; Unsal, Osman Sabri; Radojkovic, Petar; Martorell Bofill, Xavier; Miranda, Alberto; Guitart Fernández, Jordi; Corbalán González, Julita; Peña Monferrer, Antonio José; Bautista Gomez, Leonardo Arturo; Vázquez García, Miguel; Beltran Querol, Vicenç; Queralt Calafat, Anna; Nou Castell, Ramon; Borrell Pol, Ricard; Houzeaux, Guillaume; Serradell Maronda, Kim; Carrera Pérez, David; García Sáez, Artur; Puchol García, Carlos (2022-09)
      Report de recerca
      Accés obert
      This document feeds research and development priorities devel-oped by the European HPC ecosystem into EuroHPC’s Research and Innovation Advisory Group with an aim to define the HPC Technology research Work Programme and ...
    • FFT-based Poisson Solver for large scale numerical simulations of incompressible flows 

      Borrell Pol, Ricard; Lehmkuhl Barba, Oriol; Trias Miquel, Francesc Xavier; Oyarzún, G.; Oliva Llena, Asensio (2011)
      Comunicació de congrés
      Accés obert
      In the context of time-accurate numerical simulation of incompressible flows, a Poisson equation needs to be solved at least once per time-step to project the velocity field onto a divergence-free space. Due to the non-local ...
    • Flow dynamics in the turbulent wake of a sphere at sub-critical Reynolds numbers 

      Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol; Borrell Pol, Ricard; Oliva Llena, Asensio (2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The direct numerical simulation of the flow over a sphere is performed. The computations are carried out in the sub-critical regime at Re = 3700 and Re = 10000 (based on the free-stream velocity and the sphere diameter). ...
    • Flow past a NACA0012 airfoil: from laminar separation bubbles to fully stalled regime 

      Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol; Borrell Pol, Ricard; Oliva Llena, Asensio (Springer, 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial