Computer Applications in Science & Engineering

Enviaments recents

  • Parallel mesh partitioning based on space filling curves 

    Borrell, Ricard; Cajas, Juan C.; Mira, Daniel; Taha, A.; Koric, S.; Vázquez, Mariano; Houzeaux, Guillaume (Elsevier, 2018-09)
    Article
    Accés restringit per política de l'editorial
    Larger supercomputers allow the simulation of more complex phenomena with increased accuracy. Eventually this requires finer and thus also larger geometric discretizations. In this context, and extrapolating to the Exascale ...

  • Evaluating the roles of detailed endocardial structures on right ventricular haemodynamics by means of CFD simulations 

    Sacco, Federica; Paun, Bruno; Lehmkuhl, Oriol; Iles, Tinen L.; Iaizzo, Paul A.; Houzeaux, Guillaume; Vázquez, Mariano; Butakoff, Constantine; Aguado-Sierra, Jazmin (Wiley, 2018-09)
    Accés restringit per política de l'editorial
    Computational modelling plays an important role in right ventricular (RV) haemodynamic analysis. However, current approaches use smoothed ventricular anatomies. The aim of this study is to characterise RV haemodynamics ...

  • Large eddy simulation for automotive aerodynamics with Alya 

    Lehmkuhl, Oriol; Chrysokentis, Georgios; Gomez, Samuel; Owen, Herbert (2018-07-09)
    Comunicació de congrés
    Accés obert
    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 ...

  • Mesh generation, sizing and convergence for onshore and offshore wind farm Atmospheric Boundary Layer flow simulation with actuator discs 

    Gargallo-Peiró, Abel; Avila, Matias; Owen, Herbert; Prieto-Godino, Luis; Folch, Arnau (Elsevier, 2018-12)
    Article
    Accés obert
    A new mesh generation process for wind farm modeling is presented together with a mesh convergence and sizing analysis for wind farm flow simulations. The generated meshes are tailored to simulate Atmospheric Boundary Layer ...

  • Recent EUROfusion Achievements in Support of Computationally Demanding Multiscale Fusion Physics Simulations and Integrated Modeling 

    Voitsekhovitch, I.; Hatzky, R.; Coster, D.; Imbeaux, F.; McDonald, D.C.; Fehér, T.B.; Kang, K.S.; Leggate, H.; Martone, M.; Mochalskyy, S.; Sáez, Xavier; Ribeiro, T.; Tran, T.-M-; Gutierrez-Milla, A.; Aniel, T.; Figat, D.; Fleury, L.; Hoenen, O.; Hollocombe, J.; Kaljun, D.; Manduchi, G.; Owsiak, M.; Pais, V.; Palak, B.; Plociennik, M.; Signoret, J.; Vouland, C.; Yadykin, D.; Robin, F.; Iannone, F.; Bracco, G.; David, J.; Maslennikov, A.; Noé, J.; Rossi, E.; Kamendje, R.; Heuraux, S.; Hölzl, M.; Pinches, S.D.; da Silva, F.; Tskhakaya, D. (American Nuclear Society, 2018-02-21)
    Article
    Accés obert
    Integrated modeling (IM) of present experiments and future tokamak reactors requires the provision of computational resources and numerical tools capable of simulating multiscale spatial phenomena as well as fast transient ...

  • Observations and modelling of ion cyclotron emission observed in JET plasmas using a sub-harmonic arc detection system during ion cyclotron resonance heating 

    McClements, K.G.; Brisset, A.; Chapman, B.; Dendy, R.O.; Jacquet, P.; Kiptily, V.G.; Mantsinen, Mervi; Reman, B.C.G.; JET Contributors (IOP Publishing:, 2018-07-10)
    Article
    Accés obert
    Measurements are reported of electromagnetic emission close to the cyclotron frequency of energetic ions in JET plasmas heated by waves in the ion cylotron range of frequencies (ICRF). Hydrogen was the majority ion species ...

  • 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)
    Comunicació de congrés
    Accés obert
    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 ...

  • Linear scaling DFT calculations for large tungsten systems using an optimized local basis 

    Mohr, Stephan; Eixarch, Marc; Amsler, Maximilian; Mantsinen, Mervi J.; Genovese, Luigi (Elsevier, 2018-05)
    Article
    Accés obert
    Density functional theory (DFT) has become a standard tool for ab-initio simulations for a wide range of applications. While the intrinsic cubic scaling of DFT was for a long time limiting the accessible system size to ...

  • A wind field downscaling strategy based on domain segmentation and transfer functions 

    Barcons, Jordi; Avila, Matias; Folch, Arnau (Wiley, 2018-02-06)
    Article
    Accés obert
    This paper presents a novel methodology for mesoscale‐to‐microscale downscaling of near‐surface wind fields. The model chain consists on the Weather Research and Forecast mesoscale model and the Alya‐CFDWind microscale ...

  • Left Ventricular Trabeculations Decrease the Wall Shear Stress and Increase the Intra-Ventricular Pressure Drop in CFD Simulations 

    Sacco, Federica; Paun, Bruno; Lehmkuhl, Oriol; Iles, Tinen L.; Iaizzo, Paul A.; Houzeaux, Guillaume; Vázquez, Mariano; Butakoff, Constantine; Aguado-Sierra, Jazmin (Frontiers Media, 2018-04-30)
    Article
    Accés obert
    The aim of the present study is to characterize the hemodynamics of left ventricular (LV) geometries to examine the impact of trabeculae and papillary muscles (PMs) on blood flow using high performance computing (HPC). ...

  • MPI+X: task-based parallelization and dynamic load balance of finite element assembly 

    Garcia-Gasulla, Marta; Houzeaux, Guillaume; Ferrer, Roger; Artigues, Antoni; López, Victor; Labarta, Jesús; Vázquez, Mariano (2018)
    Working paper
    Accés obert
    The main computing tasks of a finite element code(FE) for solving partial differential equations (PDE's) are the algebraic system assembly and the iterative solver. This work focuses on the first task, in the context of ...

  • Overview of ASDEX Upgrade results 

    ASDEX Upgrade Team; EUROfusion MST1 Team; Mantsinen, Mervi (International Atomic Energy Agency (IAEA), 2017-06-28)
    Article
    Accés obert
    The ASDEX Upgrade (AUG) programme is directed towards physics input to critical elements of the ITER design and the preparation of ITER operation, as well as addressing physics issues for a future DEMO design. Since 2015, ...

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