Now showing items 1-20 of 22

  • A CFD framework for offshore and onshore wind farm simulation 

    Avila, Matias; Gargallo-Peiró, Abel; Folch, Arnau (IOP Publishing, 2017)
    Article
    Open Access
    We present a wind simulation framework for offshore and onshore wind farms. The simulation framework involves an automatic hybrid high-quality mesh generation process, a pre-processing to impose initial and boundary ...
  • A Novel approach to reconstruct the plinian and co-ignimbrite phases of large eruptions - Campanian Ignimbrite 

    Marti, Alejandro; Folch, Arnau; Costa, Antonio; Engwell, Samantha (Barcelona Supercomputing Center, 2015-05-05)
    Conference report
    Open Access
    Reconstructing the volume and tephra dispersal from volcanic super-eruptions is necessary to assess the widespread impact of these massive events on climate, ecosystems and humans. Recent studies have demonstrated that ...
  • A Parallel CFD Model for Wind Farms 

    Avila, Matías; Folch, Arnau; Houzeaux, Guillaume; Eguzkitza, Beatriz; Prieto, Luis; Cabezón, Daniel (Elsevier, 2013-06-01)
    Article
    Open Access
    We present a Computational Fluid Dynamics (CFD) modeling strategy for onshore wind farms aimed at predicting and opti- mizing the production of farms using a CFD model that includes meteorological data assimilation, complex ...
  • A simplified model for bottom trawl fishing gears 

    Folch, Arnau; Prat Farran, Joana d'Arc; Antonijuan Rull, Josefina (2007-05-12)
    Article
    Open Access
    Computational modeling is a valuable complementary tool to assess behavior of bottom trawl fishing gears. A simplified model of the gear that mainly affects to the net is proposed. The model is constrained to steady towing ...
  • A simplified model for bottom trawl fishing gears 

    Folch, Arnau; Prat, Joana; Antonijuan Rull, Josefina; Sala, A.; Sardà, Francesc; Manuel Lázaro, Antonio (SARTI (Technological Development Centre of Remote Acquisition and Data processing Systems), 2008-04-08T15:55:17Z)
    Article
    Open Access
  • A wind field downscaling strategy based on domain segmentation and transfer functions 

    Barcons, Jordi; Avila, Matias; Folch, Arnau (Wiley, 2018-02-06)
    Article
    Open Access
    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 ...
  • Beyond eruptive scenarios: assessing tephra fallout hazard from Neapolitan volcanoes 

    Sandri, Laura; Costa, Antonio; Selva, Jacopo; Tonini, Roberto; Macedonio, Giovanni; Folch, Arnau; Sulpizio, Roberto (Nature Publishing Group, 2016-04-12)
    Article
    Open Access
    Assessment of volcanic hazards is necessary for risk mitigation. Typically, hazard assessment is based on one or a few, subjectively chosen representative eruptive scenarios, which use a specific combination of eruptive ...
  • DISPAR: a tool to model bottom trawl fishing gears 

    Antonijuan Rull, Josefina; Prat, Joana; Folch, Arnau; Gualdo Sesma, Olga; Sardà, Francesc; Manuel Lázaro, Antonio (SARTI (Technological Development Centre of Remote Acquisition and Data processing Systems), 2008-04-08T16:01:20Z)
    Article
    Open Access
  • Diurnal cycle RANS simulations applied to wind resource assessment 

    Barcons, Jordi; Avila, Matias; Folch, Arnau (Wiley, 2019-02)
    Article
    Open Access
    Microscale computational fluid dynamics (CFD) models can be used for wind resource assessment on complex terrains. These models generally assume neutral atmospheric stratification, an assumption that can lead to inaccurate ...
  • FPLUME-1.0: An integral volcanic plume model accounting for ash aggregation 

    Folch, Arnau; Costa, Antonio; Macedonio, Giovannin (EGU Journals, 2016-02-02)
    Article
    Open Access
    Eruption source parameters (ESP) characterizing volcanic eruption plumes are crucial inputs for atmospheric tephra dispersal models, used for hazard assessment and risk mitigation. We present FPLUME-1.0, a steady-state 1-D ...
  • 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
    Open Access
    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 ...
  • Multimodal deep learning methods for person annotation in video sequences 

    Folch, Arnau (Universitat Politècnica de Catalunya, 2018-10)
    Bachelor thesis
    Open Access
    The purpose of this project is to focus in exploring deep learning methods for multimodal person recognition in video sequences. The project will be carried out in the context of unsupervised person annotation systems for ...
  • Optimization of atmospheric transport models on HPC platforms 

    de la Cruz, Raúl; Folch, Arnau; Farré, Pau; Cabezas, Javier; Navarro, Nacho; Cela, José M. (Elsevier, 2016-12)
    Article
    Open Access
    The performance and scalability of atmospheric transport models on high performance computing environments is often far from optimal for multiple reasons including, for example, sequential input and output, synchronous ...
  • Optimization of atmospheric transport models on HPC platforms 

    De la Cruz Martinez, Raul; Folch, Arnau; Farré, Pau; Cabezas, Javier; Navarro, Nacho; Cela Espín, José M. (2016-12)
    Article
    Open Access
    The performance and scalability of atmospheric transport models on high performance computing environments is often far from optimal for multiple reasons including, for example, sequential input and output, synchronous ...
  • Potential ash impact from Antarctic volcanoes: Insights from Deception Island’s most recent eruption 

    Geyer, A.; Marti, Alejandro; Giralt, S.; Folch, Arnau (Nature Publishing Group, 2017-11-28)
    Article
    Open Access
    Ash emitted during explosive volcanic eruptions may disperse over vast areas of the globe posing a threat to human health and infrastructures and causing significant disruption to air traffic. In Antarctica, at least five ...
  • Reconstructing the plinian and co-ignimbrite sources of large volcanic eruptions: A novel approach for the Campanian Ignimbrite 

    Marti, Alejandro; Folch, Arnau; Costa, Antonio; Engwell, Samantha (Nature Publishing Group, 2016-02-17)
    Article
    Open Access
    The 39 ka Campanian Ignimbrite (CI) super-eruption was the largest volcanic eruption of the past 200 ka in Europe. Tephra deposits indicate two distinct plume forming phases, Plinian and co-ignimbrite, characteristic of ...
  • Representing Urban Geometries for Unstructured Mesh Generation 

    Gargallo-Peiró, Abel; Folch, Arnau; Roca, Xevi (Elsevier, 2016)
    Article
    Open Access
    We present a robust and automatic method to generate an idealized surface geometry of a city landscape ready to be meshed for computer simulations. The city geometry is idealized for non viscous flow simulations and targets ...
  • Results of the eruptive column model inter-comparison study 

    Costa, Antonio; Suzuki, Yujiro J.; Cerminara, Matteo; Devenish, Ben J.; Ongaro, Tomaso E.; Herzog, Michael; van Eaton, Alexa R.; Denby, L. C.; Bursik, Marcus I.; Vitturi, M. de' Michieli; Engwell, Samantha L.; Neri, Augusto; Barsotti, Sara; Folch, Arnau; Macedonio, Giovanni V.; Girault, Frédéric; Carazzo, Guillaume; Tait, Steve R.; Kaminski, Édouard; Mastin, Larry G.; Woodhouse, Mark J.; Phillips, Jeremy C.; Hogg, Andrew J. C.; Degruyter, Wim; Bonadonna, Constanza (Elsevier, 2016-02-06)
    Article
    Open Access
    To improve our understanding of the physics of volcanic plumes and their interaction with the atmosphere, increasingly sophisticated numerical models of eruptive columns have been developed by a growing number of research ...
  • Uncertainties in volcanic plume modeling: A parametric study using FPLUME 

    Macedonio, Giovanni; Costa, Antonio; Folch, Arnau (Elsevier, 2016-10-15)
    Article
    Open Access
    We carry out a parametric study in order to identify and quantify the effects of uncertainties on pivotal parameters controlling the dynamics of volcanic plumes. The study builds upon numerical simulations using FPLUME, ...
  • Unveiling WARIS Code, a Parallel and Multi-purpose FDM Framework 

    de la Cruz, Raúl; Hanzich, Mauricio; Folch, Arnau; Houzeaux, Guillaume; Cela, José Maria (Springer, 2014-10-31)
    Conference report
    Open Access
    WARIS is an in-house multi-purpose framework focused on solving scientific problems using Finite Difference Methods as numerical scheme. Its framework was designed from scratch to solve in a parallel and efficient way Earth ...