Now showing items 25-36 of 61

    • 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, ...
    • DNS of the rising motion of a swarm of bubbles in a confined vertical channel 

      Balcázar Arciniega, Néstor; Lehmkuhl Barba, Oriol; Castro González, Jesús; Oliva Llena, Asensio (Springer, 2018)
      Conference lecture
      Restricted access - publisher's policy
    • 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). ...
    • Improving edge finite element assembly for geophysical electromagnetic modelling on shared-memory architectures 

      Castillo-Reyes, Octavio; de la Puente, Josep; Cela, Jose M. (IEE, 2016-12-12)
      Conference report
      Open Access
      This work presents a set of node-level optimizations to perform the assembly of edge finite element matrices that arise in 3D geophysical electromagnetic modelling on shared-memory architectures. Firstly, we describe the ...
    • Implicit large-eddy simulation of compressible flows using the Interior Embedded Discontinuous Galerkin method 

      Fernandez, P.; Nguyen, N.C.; Roca, Xevi; Peraire, J. (2016)
      Conference lecture
      Open Access
      We present a high-order implicit large-eddy simulation (ILES) approach for simulating transitional turbulent flows. The approach consists of an Interior Embedded Discontinuous Galerkin (IEDG) method for the discretization ...
    • Enhancing Energy Production with Exascale HPC Methods 

      Camata, José J.; Cela, José M.; Costa, Danilo; Coutinho, Alvaro LGA; Fernández-Galisteo, Daniel; Jiménez, Carmen; Kourdioumov, Vadim; Mattoso, Marta; Mayo-García, Rafael; Miras, Thomas; Moríñigo, José A.; Navarro, Jorge; Navaux, Philippe O.A.; Oliveira, Daniel de; Rodríguez-Pascual, Manuel; Silva, Vítor; Souza, Renan; Valduriez, Patrick (2016)
      Conference lecture
      Open Access
      High Performance Computing (HPC) resources have become the key actor for achieving more ambitious challenges in many disciplines. In this step beyond, an explosion on the available parallelism and the use of special ...