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  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 ...
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  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 ...
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  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 ...
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  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 ...
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  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). ...
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  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 ...
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  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, ...
• The combustion mitigation of methane as a non-CO2 greenhouse gas 

  Jian, X.; Mira, Daniel; Cluff, D.L. (Elsevier, 2018-05)
  Article
  Accés restringit per política de l'editorial

  Anthropogenic emissions of non-CO2 greenhouse gases such as fugitive methane contribute significantly to global warming. A review of fugitive methane combustion mitigation and utilisation technologies, which are primarily ...
• Regional aerosol deposition in the human airways: The SimInhale benchmark case and a critical assessment of in silico methods 

  Koullapis, P.; Kassinos, S.C.; Muela Castro, Jordi; Perez-Segarra, C.; Rigola, J.; Lehmkuhl, Oriol; Cui, Y.; Sommerfeld, M.; Jicha, M.; Saveljic, I.; Filipovic, N.; Lizal, F.; Nicolaou, L. (Elsevier, 2018-02-15)
  Article
  Accés restringit per política de l'editorial

  Regional deposition effects are important in the pulmonary delivery of drugs intended for the topical treatment of respiratory ailments. They also play a critical role in the systemic delivery of drugs with limited lung ...
• LES-based Study of the Roughness Effects on the Wake of a Circular Cylinder from Subcritical to Transcritical Reynolds Numbers 

  Rodriguez, Ivette; Lehmkuhl, Oriol; Piomelli, Ugo; Chiva, Jorge; Borrell, Ricard; Oliva, Assensi (Springer Verlag, 2017-12)
  Article
  Accés restringit per política de l'editorial

  This paper investigates the effects of surface roughness on the flow past a circular cylinder at subcritical to transcritical Reynolds numbers. Large eddy simulations of the flow for sand grain roughness of size k/D = 0.02 ...
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  High-Performance Computing: Do’s and Dont’s 

  Houzeaux, Guillaume; Borrell, Ricard; Fournier, Yvan; Garcia-Gasulla, Marta; Göbbert, Jens H.; Hachem, Elie; Mehta, Vishal; Mesri, Youssef; Owen, Herbert; Vázquez, Mariano (InTech, 2018-02-14)
  Capítol de llibre
  Accés obert

  Computational fluid dynamics (CFD) is the main field of computational mechanics that has historically benefited from advances in high-performance computing. High-performance computing involves several techniques to make a ...
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  The Effect of Partial Premixing and Heat Loss on the Reacting Flow Field Prediction of a Swirl Stabilized Gas Turbine Model Combustor 

  Gövert, Simon; Mira, Daniel; Kok, Jim B. W.; Vázquez, Mariano; Houzeaux, Guillaume (Springer Verlag, 2018-03)
  Article
  Accés obert

  This work addresses the prediction of the reacting flow field in a swirl stabilized gas turbine model combustor using large-eddy simulation. The modeling of the combustion chemistry is based on laminar premixed flamelets ...

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