Ponències/Comunicacions de congressos

Recent Submissions

  • Large eddy simulation for automotive aerodynamics with Alya 

    Lehmkuhl, Oriol; Chrysokentis, Georgios; Gomez, Samuel; Owen, Herbert (2018-07-09)
    Conference lecture
    Open Access
    The prodigious potential offered by the ever-growing computing infrastructure is fostering the use of large eddy simulation for automotive aerodynamics. This approach, which resolves the larger dynamically important eddies ...

  • A Massively Parallel Algorithm for the Approximate Calculation of Inverse p-th Roots of Large Sparse Matrices 

    Lass, Michael; Mohr, Stephan; Wiebeler, Hendrik; Kühne, Thomas D.; Plessl, Christian (Association for Computing Machinery (ACM), 2018-07)
    Conference lecture
    Open Access
    We present the submatrix method, a highly parallelizable method for the approximate calculation of inverse p-th roots of large sparse symmetric matrices which are required in different scientific applications. Following ...

  • Strategies to Improve the Performance of a Geophysics Model for Different Manycore Systems 

    Serpa, Matheus S.; Cruz, Eduardo H.M.; Diener, Matthias; Krause, Arthur M.; Navaux, Philippe O.A.; Farrés, Albert; Rosas, Claudia; Hanzich, Mauricio; Panetta, Jairo (IEEE, 2017-11-16)
    Conference lecture
    Open Access
    Many software mechanisms for geophysics exploration in Oil & Gas industries are based on wave propagation simulation. To perform such simulations, state-of-art HPC architectures are employed, generating results faster and ...

  • Modelling of combined ICRF and NBI heating in JET hybrid plasmas 

    Gallart, Dani; Mantsinen, Mervi; Challis, Clive; Frigione, Domenico; Graves, Jonathan; Hobirk, Joerg; Belonohy, Eva; Czarnecka, Agata; Eriksson, Jacob; Goniche, Marc; Hellesen, Carl; Jacquet, Philippe; Joffrin, Emmanuel; Krawczyk, Natalia; King, Damian; Lennholm, Morten; Lerche, Ernesto; Pawelec, Ewa; Sips, George; Solano, Emilia; Tsalas, Maximos; Valisa, Marco; JET Contributors (EDP Sciences, 2017-10-23)
    Article
    Open Access
    During the 2015-2016 JET campaigns many efforts have been devoted to the exploration of high performance plasma scenarios envisaged for ITER operation. In this paper we model the combined ICRF+NBI heating in selected key ...

  • Nonlinear electromagnetic stabilization of ITG microturbulence by ICRF-driven fast ions in ASDEX Upgrade 

    de Oliveira, F.N.; Doerk, H.; Mantsinen, Mervi J.; Angioni, C.; Bilato, R.; Bobkov, V.; Dunne, M.; Gallart, D.; Gutiérrez-Milla, A.; Mantica, P.; Odstrcil, T.; Tardini, G.; Sáez, Xavier; ASDEX Upgrade Team; EUROfusion MST1 Team (2016-10)
    Conference lecture
    Open Access
    Electromagnetic waves in the range of Ion Cyclotron Resonance Frequencies (ICRF) have many applications in fusion devices. While their use for external heating of magnetically confined fusion plasmas is well established, ...

  • Evaluating directive-based programming models on Wave Propagation Kernels 

    Rodriguez, Samuel; Farré, Pau; Rosas, Claudia; Hanzich, Mauricio (EAGE, 2017-06-12)
    Conference lecture
    Open Access
    HPC systems have become mandatory to tackle the ever-increasing challenges imposed by new exploration areas around the world. The requirement for more HPC resources depends on the complexity of the area under exploration, ...

  • Optimizing Fully Anisotropic Elastic Propagation on 2nd Generation Intel Xeon Phi Processors 

    Farres, Albert; Duran, A.; Rosas, Claudia; Hanzich, Mauricio; Yount, C.; Fernandez, S. (2017-06-12)
    Conference lecture
    Open Access
    This work shows several optimization strategies evaluated and applied to an elastic wave propagation engine, based on a Fully Staggered Grid, running on the latest Intel Xeon Phi processors, the second generation of the ...

  • Three-Dimensional CSEM Modelling on Unstructured Tetrahedral Meshes Using Edge Finite Elements 

    Castillo-Reyes, Octavio; de la Puente, Josep; Cela, Jose M. (Springer International Publishing, 2017-04-29)
    Conference lecture
    Open Access
    The last decade has been a period of rapid growth for electromagnetic methods (EM) in geophysics, mostly because of their industrial adoption. In particular, the marine controlled-source electromagnetic method (CSEM) has ...

  • Performance Evaluation of Multiple Cloud Data Centers Allocations for HPC 

    Roloff, Eduardo; Carreño, Emmanuell D.; Valverde-Sanchez, Jimmy K.M.; Diener, Matthias; Serpa, Matheus da Silva; Houzeaux, Guillaume; Schnorr, Lucas M.; Maillard, Nicolas; Gaspary, Luciano P.; Navaux, Philippe (Springer International Publishing, 2017-04-29)
    Conference lecture
    Open Access
    This paper evaluates the behavior of the Microsoft Azure G5 cloud instance type over multiple Data Centers. The purpose is to identify if there are major differences between them and to help the users choose the best option ...

  • Study of the Wall Thermal Condition Effect in a Lean-Premixed Downscaled Can Combustor Using Large-Eddy Simulation 

    Mira, Daniel; Vázquez, Mariano; Houzeaux, Guillaume; Gövert, Simon; Kok, Jim W.B.; Mahiques, E.I.; Panek, Lukasz (American Society of Mechanical Engineers, 2016-06-13)
    Conference lecture
    Open Access
    The primary purpose of this study is to evaluate the ability of LES, with a turbulent combustion model based on steady flamelets, to predict the flame stabilization mechanisms in an industrial can combustor at full load ...

  • Radiation-Induced Error Criticality in Modern HPC Parallel Accelerators 

    Oliveira, Daniel; Pilla, Laercio; Hanzich, Mauricio; Fratin, Vinicius; Fernandes, Fernando; Lunardi, Caio; Cela, Jose M.; Navaux, Philippe; Carro, Luigi; Rech, Paolo (2016-03)
    Conference lecture
    Open Access
    In this paper, we evaluate the error criticality of radiation-induced errors on modern High-Performance Computing (HPC) accelerators (Intel Xeon Phi and NVIDIA K40) through a dedicated set of metrics. We show that, as long ...

  • Non-linear MHD Simulation s of Pellet Triggered ELMs in JET and ASDEX Upgrade tokamaks 

    Futatani, Shimpei; Pamela, S.; Huijsmans, G.T.A.; Garzotti, L.; Frigione, D.; Loarte, D.; Hoelzl, M.; Lang, P.T.; Kocsis, G.; Orain, F.; Dunne, M.; Lessig, A.; Mantsinen, Mervi; EUROfusion MST1 Team; ASDEX Upgrade Team; JET Contributors (2016-07-08)
    Open Access
    ITER operation in its high fusion performance DT scenarios relies on the achievement of the H-mode confinement regime, which is expected to lead to the quasi-periodic triggering of ELMs (Edge Localized Modes). ...

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